Brother I wonder if people realize how time consuming the testing you do.I just figured out that the magazines I used read the tech articles years ago were written by you.Much respect my friend..
@richardholdener1727
4 жыл бұрын
thnx
@mikehicks65
4 жыл бұрын
Off subject but,where can I buy one of those 2nd gen Camaro shirts like your wearing?
@ianm432
4 жыл бұрын
@@mikehicks65 that's a David freiburger F bomb shirt. I believe shop.davidfreiburger (dot) com
@erenzoscroggins8056
4 жыл бұрын
Yessir Rich been writing articles for years💪🏾💪🏾💪🏾 this is exactly why I follow him
@GroovesAndLands
4 жыл бұрын
It's a huge effort. BUT, when you're an engine nerd and there's an empty test cell with a dynamometer - well, it's like a wet pussy just waiting to get fucked. The urge to fill the test cell and put it to good use is simply overwhelming. Been there. Loved it. Miss it.
@kylemilligan752
4 жыл бұрын
Pay attention folks. Richard Holdener doesn't sell out to anyone. He brings hard factual data. Hard data that will never be presented in other avenues that are slaves to advertiser money. Thank You Mr Holdener!!!!!! Been reading your tests, buying your books since the Silver State Notch😁
@richardholdener1727
4 жыл бұрын
thnx
@ashleighsmith6755
2 жыл бұрын
@@richardholdener1727 Hi Richard. That’s so much for doing what you do. I’m in my second year of circuit racing in Darwin Australia, I have a VT commodore with a rock stock Ls1 T 56 box. I’d like to do some upgrades to the big 3. Can you please provide some input on the upgrades and hopefully be able to move the heads cam and intake to a 6 or 6.2 in 18 months time when a new motor is built. Cheers And Thanks again Ash.
@BEANS-O-MATICtransmissions
4 жыл бұрын
Soon as the rocker ratio changed, the results were out the window and not comparable to the others. Yes, the mast would be right up there but you can't fairly compare those to the others with having more lift. I know guys bust your chops about using the wrong cam, lol, but i think the test definitely coulda used a bigger cam with that amount of cubes. Besides the Mast heads, you proved the difference between all the rec's, great test !
@lafinrat
4 жыл бұрын
I'd love to see an updated test that includes the AFR and TFS LS3 heads.
@xxxroberttheking
4 жыл бұрын
I’d like to see that as well but I would also like to see mast intake vs Holley LS3 dual bdw crossram intake. In the last intake test with the crossram, it made more power everywhere.
@waynebollentin989
4 жыл бұрын
Yes I believe this test is from almost 10 years ago.
@derricklaroche964
4 жыл бұрын
TFS tested there’s on a ls3. Made almost 600hp with a very conservative cam stock everything else 6.2.
@GroovesAndLands
4 жыл бұрын
Badass testing. Thank you! What mad scientist have they got at Mast that came up with the (by far) smallest port with the most flow - that made the best power? I've long been a fan of Darin Morgan cylinder heads, and would have liked so see something by him. EDIT: I swear I wrote that first part before googling and learning that Darin is now working for MAST. I guess now I know who that mad scientist is!
@tedtrotz8145
4 жыл бұрын
The mast heads out flow all the others across the board, so the higher peak power is not just a function of the higher lift, but it does help. Thank you for sharing all of this info!!!! I was kind of waiting for this but lost patience and sent mine out to Frankenstein.
@stevelargen9497
4 жыл бұрын
Old guy told me, (intake flow)x2+10%=max horsepower possible. I'm assuming that's for NA apps. Nice job, as usual. Thanks Richard! 😁
@ls87gbody
4 жыл бұрын
This was the video ive been wanting to see. Those Gm performance cnc heads actually made more power than i thought they would. Thanks you Richard for all your hard work and excellent content! You are the man. By you doing all this testing, we see what does what , and it saves us money, time and headaches by using wrong parts and combos.
@GroovesAndLands
4 жыл бұрын
Those GMPP heads work damn well. Look at the port size though - GM hogs them the fuck out! 19cc material removed!
@JohnThomas-vb9se
4 жыл бұрын
I’m thinking a solid roller with 270-280 duration and .700 or more lift would’ve widened the gap much more at the top.
@richardholdener1727
4 жыл бұрын
agreed
@harryharry3193
4 жыл бұрын
absolutely. great power for the mildness.....if the numbers are not overly corrected. the bigger heads would shine more.... huge valves in these heads.....like the ole cleveland Ford. whats old is new.
@genuinegarage
4 жыл бұрын
Free thumbs up for great titles. My favorite was battle of the borgs. But this is up there
@blair79bear38
4 жыл бұрын
Low speed performance for the win. unless all you do is 1/4 mile racing. In my opinion on the streetyou spend way more time at slower engine speeds than twisting it as fast as it'll turn. But, what do I know.
@drivinwithdrew7676
4 жыл бұрын
Now I want a 468 cubic inch LS
@timothybayliss6680
4 жыл бұрын
There even better with boost
@timothybayliss6680
4 жыл бұрын
@@hendo337 if I was gonna build something for the street I would look for a gen4 4.8 they're almost free and crazy strong. Even at car guy power levels you need to finance your tire budget. Your right though I probably wouldn't boost a 4.185 bore ls too much. Take the 12ci hit in displacement so that it lives longer.
@that1guy997
4 жыл бұрын
You mean need.
@Turbo_Todd
4 жыл бұрын
I have a 454 LSX with that same split/ hand polished intake with 2250 accufab Dominator TB., 11.7:1, cast LS7 style gmpp heads. Stock GMPP cam. Makes 650hp. Now i want a bigger cam!!
@blair79bear38
4 жыл бұрын
Just go with the LSX454r
@bigkellyg5947
4 жыл бұрын
It's summer time Richard. You need to take a road trip to Parker, or Havasu for inspiration, and research. Cold Beer, Skimpy Bikinis and Hot Boats. How about some BB boat motors for our Flat Bottoms, and Hydros. Every guy with a boat tinkers on the motors in the winter. They have families, so money is a budget thing. Mopars, Chevies, Fords, in every size and shape. Just an idea.
@bdugle1
3 жыл бұрын
Looking back to a serious cylinder head test-amazing effort! The Mast heads appear to be attuned to the 0.661” lift as they drop off a bit at 0.700” lift. So the lift was probably a big factor. But Richard, we need to compare this LS 468 to a 0.060”-over 454 with optimized heads, cam, and intake! And while you’re at it, include the overall weight of the package. I’m sure you’ve got the data in your archives, so let’s see it!
@timothybayliss6680
4 жыл бұрын
If you were running this with E85 on the street, a road course or even a 1/3 mile oval car, the efi intake would probably be the way to go. How much torque this makes your gonna have issue on the strip and the 30hp will show up every single time.
@ddn79
4 жыл бұрын
The extra lift isn't going to add the much more HP on the Mast heads. The little taller deck and port making it a better flowing head is why it makes more power. But those heads are big bucks.
@ZackNakazora1
4 жыл бұрын
I think that was the underlying point he was making. Unless we have 700 hp na engines the stock rec port stuff is pretty good. Leaves me wanting a 6.0 with a stock Rec port head and some compression for power.
@jeffwooton7138
4 жыл бұрын
Would love to see some test on torque for these "LS3" heads. I've got both an LY6, and a L96 truck. They work for a living. We need truck torque tests!
@bill2178
4 жыл бұрын
Forget it these heads are so big there's not going to be any difference down low cathedral ports for torque on the vortec 350 s there's no aftermarket head that makes low speed torque production like the factory vortec heads
@broz1969
4 жыл бұрын
There is no magic bullet to make more torque down low.... other then displacement... different cam/heads/compression, can give you a boost at the lower end, but don't expect to gain 50 ft.lbs from those changes at 3500 or below.
@richardholdener1727
4 жыл бұрын
take a look at the BTR truck cam test video on the 6.0L (LY6)
@broz1969
4 жыл бұрын
@@richardholdener1727 where is the link my man?
@bill2178
4 жыл бұрын
@@broz1969 truck cam triple test 5.3 6.0
@funfun8095
4 жыл бұрын
Put 1.8s on the AFR 245s
@petejoseph8257
3 жыл бұрын
No AFR, no TFS, no Edelbrock? What kind of test is this?
@richardholdener1727
3 жыл бұрын
THEY DID NOT MAKE THOSE WHEN THIS TEST WAS DONE
@tonkatoytruck
2 жыл бұрын
I have heard good things about the Liberty heads once they have been ported. They are VERY inexpensive and more than cover the cost of good port job and quality valvetrain.
@C5Z06CarGuy
4 жыл бұрын
It would be interesting to see how the cathedral port 245's would compare to the mast LS3 heads with lift being equal.
@christelford2243
4 жыл бұрын
I blame the squirrels first.
@Sir.VicsMasher
4 жыл бұрын
Can you please test out Edelbrock's E-CNC renctangle port heads for small bore Cathederal port engines?
@frtaylor9
4 жыл бұрын
Question is did the 245 heads have a 1.7 or 1.8 rocker like the MAST?
@414Chevy
4 жыл бұрын
They should be 1.7. Think the 1.8 on the Mast with the bigger intake valve made the Mast out shine the others.
@richardholdener1727
4 жыл бұрын
1.7 on the AFR
@kevinshiley9061
4 жыл бұрын
How would the 1.8:1 rockers change the AFR numbers?
@derricklaroche964
4 жыл бұрын
I don’t think the 1.8s would of made up the difference between the mast and afr but it would of tightened up the gap.
@jessereel406
4 жыл бұрын
Thanks for the continued testing. Is there perhaps a misprint in the head specs chart for the Average Torque on the stock LS3? It shows 483.1? The CNC version can't possibly be over 110 ft lbs increase can it?
@richardholdener1727
4 жыл бұрын
I'll check-its 583
@herbslusher4409
3 жыл бұрын
I would go with the higher torque as long as I could hook up with traction on launch.
@isidrosevier1125
4 жыл бұрын
I want to see some Texas speed heads, and gwatney performance heads
@christophermix6845
3 жыл бұрын
PRCs are pathetic. Checkout JPI cylinder heads on Facebook he shows their heads vs his, you'll see what I mean.
@tonkatoytruck
3 жыл бұрын
Just looking at the flow numbers, The West Coast Cylinder Heads did not drop off in flow as the flow increased. That is a good thing, even if you are not using a cam with lifts above 0.600". It indicates the flow will be even better at low lift when actually in operation.
@C5Z06CarGuy
4 жыл бұрын
How does that hp per cfm ratio change when boost is mixed into the equation?
@richardholdener1727
4 жыл бұрын
boost just increases what is there
@C5Z06CarGuy
4 жыл бұрын
@@richardholdener1727 But do you still run out of cylinder head the same way? For instance, let's say I have some ported 243's that flow 300cfm, and I'm running a D1sc procharger making 800hp. That's 2.6 hp per cfm. If I upgraded to AFR 245's that flow 356cfm, would I make more power on the top end? Or would the boost pressure I'm observing just decrease.
@ryryy1980
Жыл бұрын
Please help, I have TSP 228/228 600/600 112LSA cam kit 660" dual valve spring kit PRC titanium retainers TSP 7.400 pushrod kit TSP rocker trunion upgrade kit w/intake exaust valves on stock non-ported heads. Also, 102mm TB with FAST intake. I need some down low HP/TQ. I have the $ for heads and fuel pump. I heard RHS matches with FAST intake. But my cam?
@LunarOutlawsGarage
4 жыл бұрын
Been trying to catch up on all your videos man keep them coming 🤘
@baby-sharkgto4902
4 жыл бұрын
Where you been, Lunar 🤣
@ShainAndrews
4 жыл бұрын
No catching up. Better off searching videos of interest.
@tommylyeah
4 жыл бұрын
I'm waitin' for that dyno re-test for the 318 :)
@johnparrish9215
4 жыл бұрын
I'm a Ford guy that loves stroker Windsors with Cleveland heads, although the Ford does make good power it is not nearly as easy or affordable as the LS platform. GM hit it out of the park with this design. I'm just curious what the new direct injected engines are like, better or worse??
@richardholdener1727
4 жыл бұрын
they work well-check out the L83 video
@lacboiatl
3 жыл бұрын
You can never have enough head.......... oh back to engines, maybe lollllll. I'm doing a lsa blower on a lq4 and just grabbed some brand new gm lsa heads and thought about getting them port but doubt it after rewatching this video. Maybe get the slag off the runners and gasket match them
@srvdean3024
4 жыл бұрын
Richard please forgive the lack of knowledge, but have you done an episode testing TFS220 Fast as Cast heads on a 6.0?
@bradyelich2745
4 жыл бұрын
You already showed us that the Boss 302/351 head makes it sure there is no other stock engine that can compete. Some one should show how the Boss 429 can work. Fuck the LS, that is old school Ford tech with EFI. The only time Dodge could compete was with the 426 cheated out and a winged car. Funny, the 305 Hemi with the winged car would go just as fast, and that was quickly killed in NASCAR. A 305 ci motor turning 10,000 rpm running with, and passing the big blocks, both Dodge and Ford.
@baby-sharkgto4902
3 жыл бұрын
Lay off of the moonshine, Brad
@bradyelich2745
3 жыл бұрын
@@baby-sharkgto4902 Maybe you should, if you're a GM by-product belieber.
@DBSSTEELER
4 жыл бұрын
The Mast heads were designed for the big bore motors. The power was not just from more lift.
@mwahlert
Жыл бұрын
Is there more to the story than WOT power production? Do the heads notably influence drive-ability or engine responsiveness at part throttle?
@kennyallison7201
4 жыл бұрын
I think that the extra lift on the mast heads had a lot to do with the more power. Most of the time the more u open that valve the more air u will flow which translates to more power!
@dannoyes4493
4 жыл бұрын
I think the fact that, on the Mast head, the valves are opening 10% faster accounts for the majority of the performance gains seen. I'd be interested to see an engine test with different rocker arm ratios, and the difference (if any) on idle vacuum, and the avg hp / tq for said engine..
@harryharry3193
4 жыл бұрын
I here ya...but they do flow more everywhere on the intake.....so that means something too. I think they would shine more with more camshaft-comp-rpm. incredible the stuff out there today.....inflation adjusted, its peanuts. I am a Ford guy, these ls are making cheap race motors that run good.
@JD-rx5bo
2 жыл бұрын
I would like to see a test with the mast heads and all pro go head to head…. Lol
@bcbloc02
4 жыл бұрын
Guess those 1961 Chrysler long rams really were the ticket for street motors besides the cool factor of having the carbs over the shock towers. :-)
@nathantoth4185
4 жыл бұрын
Gonna start callin rich Vegeta, cause he Big Bangs the shit out of everything. Lol
@danielfigueroa4725
2 жыл бұрын
The problem with stock LS3 heads is valve drop you need PTV clearance to get the most potential of these heads and big lift duration cams are limited for stock LS3 heads
@tempest162
4 жыл бұрын
Please keep the dyno LS test, looking to buy me a mx5 and swap a ls engine into it and this info is a gold mine
@n8rivera74
4 жыл бұрын
Check out Tom's Turbo Garage, he LS swapped a Mazdaspeed Miata with an LS3, "Project Thunderbolt".
@LS__812
4 жыл бұрын
Also Taylor Ray has a bad Miata with a 5.3 about to turn into 6.0 NA with all the stuff to keep it turning and not knocking lol
@tempest162
4 жыл бұрын
Thanks I'll check it out
@trav1971
2 жыл бұрын
GM cnc ported Ls3 heads a good choice for BTR STG 4 cammed sbe street ls3?
@lafinrat
4 жыл бұрын
Here's a 790 HP 376 cid LS3 using factory castings. www.enginebuildermag.com/2020/02/eotw-376-cid-ls3-engine/
@InFiD3ViL1
4 жыл бұрын
Jesus Richard! Has your family seen you in the last 2 weeks?
@richardholdener1727
4 жыл бұрын
i think you mean since Dec of 2019-when the channel started
@lloydholt6511
4 жыл бұрын
As always you have a habit of separating the wheat from the chaff. For my money on a 5.3 or 6.0 ls I would probably stick with the stock heads and limit camshaft lift to around 0.550-0.580. At these lifts spring life would be reasonably good on the street and more lift with the stock heads probably would not appreciatively increase the hp very much. On the street I seldom took street motors much past 5500-6000 rpm and rarely ran more than 9:1 cr. Ran all my motors on reg or unleaded gas. I’d leave the valve timing up to those more knowledgeable than me. Would I produce tons of hp. Nope. But I’d have a dependable play toy I could beat on for a long time. Thank you for your debunking lessons. I really do enjoy them. Keep making them and I’ll keep watching them.
@mikew6135
Жыл бұрын
Weirds how David Vizard has been around for so many decades, but his cam formula is rarely used. The 112 you used in this engine should have been more like 108. You say well that's only 4deg . Yes but the difference in torque curve might be enough to beat the next guy. Oh well . Keep on pushing BT and his wide angle high duration cams. Rob Peter to pay Paul. I do respect what you do, and you are a great resource yourself and it's hard to buck the trend I know. Even though you occasionally do as when you did the LSA test and tell people that they will no lose boost even though they have been brainwashed into thinking this will happen. Thanks for all your videos/info. Very much appreciated Ps Dont they make adjustable timing chain/belt kits? Just saying
@richardholdener1727
Жыл бұрын
no one is pushing anything, I know David Vizard well, Your conspiracy thing is foolish, this (like every other video) is just a test of this or these specific parts. Every build isn't about max power.
@andyharman3022
4 жыл бұрын
I really wonder how the engineers at GM ever managed to get the LS3 head past the bean counters. They basically put a race-quality cylinder head into mass production.
@daviddavids3468
2 жыл бұрын
THE REASON GM MADE THOSE HEADS , WAS BECAUSE THE HEMI'S CAME OUT WITH THE APACHE HEADS ! GM HAD TO COMPETE
@68Swiftshifter
2 жыл бұрын
@@daviddavids3468 GM '821/'823 heads = 2008 6.2L LS3, while the Eagle heads came along in 2009 5.7L Hemi.
@erenzoscroggins8056
4 жыл бұрын
Hmmm... Since you built a 468 LS "which is dope",,, how about a 468 on 468 showdown!!! Big Block Chevy vs LS similar or same parts Heads/cam and go from there..... My money's on the Big Block all day.. and you pick Rich Carburetor or Fuel Injected
@richardholdener1727
4 жыл бұрын
the 270 cc LS3 heads does not flow as well as a 360+ cc BBC head
@waynebollentin989
4 жыл бұрын
Wow I remember reading about this test in Hot Rod like 10 years ago or so. Same 468ci motor, cam, heads used etc. Is all this information from that test? Everything sounds about the same.
@richardholdener1727
4 жыл бұрын
same test-I did it for Hot Rod
@waynebollentin989
4 жыл бұрын
@@richardholdener1727 thanks for the reply. I started reading hot rod before I could read. It was my bed time book in the 70s lol. I've always enjoyed your stuff and maybe that's why much of what I see on your channel is so familiar. Keep up the great work bro.
@JacobBennett45
4 жыл бұрын
Would’ve like to have seen how Texas speed ported ls3 heads did but not at all taking away from your work. Lot of time and work when into this. Thank you for your very informative videos
@leonpeyton7590
11 ай бұрын
Hello, I'm sorry to bug you, but I have a lq4 6.0l ls. I would like to change the 317 heads to 823s with an ls3 intake. What all do I have to do to make this set up work well and what cam should i go with. I want to have more power down low 1500 to 4500 range on the rpms
@richardholdener1727
11 ай бұрын
you are going in the wrong direction if you want power below 4000-put 799 or 706 heads on it-not rec port-the rec ports will make more power but will do it after 4000 rpm
@75zl1
4 жыл бұрын
A stock LS3 head can make 700hp... that is wild.
@mrmysterious6006
4 жыл бұрын
Richard, you are a legend! Thanks for throwing on those afr 245s on a big engine. They were never designed for an engine that big but they did hang on good for what they are. They were only 20hp down from the mast heads which is not much different. If you go on AFRs website they are designed for 416-454 engines. Mast do you have the best ls3 heads though IMO. AFR's Ls3 head is also very good too. Great test. One of my favourites. Another suggestion, reach out to Tony Mamo and get one of his reworked trickflow LS7 heads. These have made 700rwhp through a manual trans corvette along with his ported MSD intake.
@aliharvey9946
4 жыл бұрын
Wonder how much closer they would of been if the same rocker ratio was used.
@masyningles8667
4 жыл бұрын
I'd love to see some more lt1 action maybe ported lt1 heads vs lt4 heads or forced induction
@bigal878
4 жыл бұрын
What is the part number on the GM PERFORMANCE CNC LS3 heads? Are they also the 821 castings? Thanks
@FredRTP96
3 жыл бұрын
821
@joesliger1633
4 жыл бұрын
Great videos I'd like to see a comparison of flat plane crankshafts against a standard crankshaft, where do you gain power or loose.
@timothybayliss6680
4 жыл бұрын
When gm was doing the c5r program the engineers said even if they could they wouldn't use a flat plane because the gain from tuning would be less than the loss from increased frictional losses. It's almost a mute point. Ford has gone back to typical crank with the gt500 and FCA uses 90° cranks in Maserati cars and flat cranks in the same engine family in Ferrari cars. The gains comes from tuning and rotational inertia of the crank. A good exhaust header does one and a light weight crank does the other. It's really had to justify the cost, a 90° v8 will have a higher Rev limit all else being equal because of the inherent natural balance of the engine. There is a reason that flat crank ls engines are one off or showcase engines because there isn't anything to be gained.
@nellyfarnsworth7381
4 жыл бұрын
20:24 The CORRECT Answer is ADD BOOST
@charlesmyers9765
9 ай бұрын
There's 4 different casting numbers for the L92/LS3. Is there a best or are they the same? Which was used for the test? 821?
@richardholdener1727
9 ай бұрын
they all flow the same
@zakudog
3 жыл бұрын
Thanks for this rich, I was about to pull the plug on some prc heads but I’ll just stick to the milling my stock ls3 since my build is mild at best
@cuzz63
4 жыл бұрын
After seeing the gains with the 1.8 rockers I have to ask what the gains on factory heads would be with those rockers.
@richardholdener1727
4 жыл бұрын
we didn't see gains with 1.8 rockers-it was the cylinder heads
@samuelpope7799
3 ай бұрын
But a lot of us listeners that watch your videos would like to see what those heads would do on a stock bottom in with maybe a stage two cam because most people are not gonna have the thousands of dollars to have that built bottom in that you’re doing these test withplease think about the little guys too
@richardholdener1727
3 ай бұрын
you don't really need ported LS3 heads on a stock bottom end with a cam-you don't have enough motor to take advantage of 700+ hp heads
@czehrbuild
4 жыл бұрын
If the mast heads utilize the offset ls7 rocker arms that must mean the intake runners are wider like an ls7 head? That would explain the power gains along with the extra lift.
@timothybayliss6680
4 жыл бұрын
That's what I thought when I heard 1.8.
@GroovesAndLands
4 жыл бұрын
Darin Morgan works for Mast. Nuff said. Their ports were the smallest tested (which is a Darin ideology), aside from stock, had the best flow, and of course, made the best average power. Darin is the cylinder head man.
@onegative8887
Жыл бұрын
Whats the cast number on factory LS3 heads
@swamie100
4 жыл бұрын
It would be nice to now what fuel you are using and your stock head had much stronger exhaust flow numbers then i have ever tested. I have seen big gains on e 85 with exhaust work,
@richardholdener1727
4 жыл бұрын
91 + splash of 100
@scottadams6506
3 жыл бұрын
Do some aftermarket ls3 heads now. Building a 408 and want to make 800. Possible?
@richardholdener1727
3 жыл бұрын
na?
@noahzempel
4 жыл бұрын
Richard, you've mentioned in past videos, correct me if I'm wrong, that the real limit of stock bottom end LS is too much torque. Being a bit of a sloppy fan, I was hoping you could elaborate more on this in video content. I realize that might take require a lot of sacrifices to the horsepower gods to come to a conclusion. So a simple explanation of your belief would suffice. Just hoping to save a few LS for the future. Keep up the great work, and thank you! P.S. don't be afraid to do some monetization for yourself...you should be making some cheese for this kind of content!
@richardholdener1727
4 жыл бұрын
the cylinder pressure exerted on the connecting rod breaks the rod at some point
@noahzempel
4 жыл бұрын
@@richardholdener1727 any ballpark as to where that would be? Like 800 ftlb below 4500 rpm?
@rentalift3625
3 жыл бұрын
Hi can you supply me with the bottom end build
@TheRdub82
4 жыл бұрын
Badass test; my TFS 225 R's from TEA are in the ballpark with the Mast LS3 head. My exhaust port out flows all in the chart @ 282 CFM at 700 lift. Going on a 430 windsor, 13:1 cr motor that will run on corn. I wonder why race/pump gas was used instead of corn? Was it because the test was done back in 2010? just a thought as I saw the date on the file tab and maybe E85 wasn't available as much in Socal back then? Anyways good test.
@dennisrobinson8008
2 жыл бұрын
Ported TFS R's could always get it done! How did that 430 W turn out?
@TheRdub82
2 жыл бұрын
@@dennisrobinson8008 there's the video on my channel. Made 715/592 on engine dyno. Two dyno sessions, changed cam only.
@sxyangeleyez
2 жыл бұрын
Thank you so much brother!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
@bradhuff2038
4 жыл бұрын
2019 6.0 in my 2500hd is such a turd down low. I bet putting on some Cath port heads would increase low speed torque production. Whatchu think?
@Only1English
Жыл бұрын
What are the best heads I can buy for my build. I want LS3 style. Are flotek or brodix trick flow summit heads or stock 823 built. Please some sort of help would really help me. I just bought your books Richard to help me in my build this winter .
@richardholdener1727
Жыл бұрын
what power level?
@Only1English
Жыл бұрын
@@richardholdener1727 thank you very much for getting back to me. I didn't even honestly expect that to happen but thank you this is why I subscribe to your channel because I did see you answer to other people.Im looking to make 900-1000hp I'm going to go turbocharged or ProCharger but I was thinking about going with the flowtek heads however your professional advice I would definitely choose over anything because I know you know what you're talking about. I just ordered the books that you have out and I'm going to do some reading up on these LS engines to see what I can do about building a good one for my build. Thank you Richard.
@SuperTurbocoupe
4 жыл бұрын
Love your style!
@Saddedude
3 жыл бұрын
GMPP cnc ported ls9 heads are where its at. They flow 340 cfm, and come STOCK with titanium intake valves and sodium filled incolnel exhaust valves. Never miond the thicker deck and stronger casting with a better alloy.
@5533851
4 жыл бұрын
Your magazine style video titles are cool Richard but it's hard to find videos sometimes. The content is so much more detailed than the title! You would get tonnes more views long term if some of that detail was in the title
@richardholdener1727
4 жыл бұрын
thnx
@rickdemorgan8951
3 жыл бұрын
I didn't see any PtoMaxx heads tested.
@richardholdener1727
3 жыл бұрын
they were not avail when I did this test
@garybegay3028
2 жыл бұрын
That Cathedral heads has air velocities. And what rpm you going shift and how far down the rpm it's going drop after shift. So much more factors. I still learning. Good info Richard. Thanks
@garymathews4042
3 жыл бұрын
thanks you just saved me $1800
@MrBlackbutang
4 жыл бұрын
Gm learned from early Buick’s design
@mohanperformance.enginerd.1308
3 жыл бұрын
First, I really appreciate this gentlemens testing and efforts. This stuff makes us all better. But my two cents is....... Although something to be learned there. Without trying similar cams except with very different valve lifts. Say .550 .650 and .750 lift ranges. It makes it hard to digest any power curve test results. I have not picked up the calculator to see if its enough. But maybe 3 sets of rockers. Like 1.4 to 1 up to 1.9 to 1
@andyharman3022
4 жыл бұрын
What happened to the Mast dyno run that you had to cut it off at 6700 rpm? All the others ran out to 7000. Did the valvetrain go out of control, and are the 1.8 rockers to blame? Yes, the higher ratio rockers helped the Mast heads. Higher ratio slightly increases duration, in addition to the increase in lift. And because of the higher lift, the port is operating at higher flow numbers throughout the valve event.
@zachkuby87
6 ай бұрын
So. Say a guy is running a stock bottom end ls3, gpi ss4 cam with a performance design xs intake in a grand sport corvette. What head would you recommend for a daily driven/weekend warrior track car
@richardholdener1727
6 ай бұрын
daily driver with SS4 cam? ported stock or AFR LS3
@zachkuby87
6 ай бұрын
@richardholdener1727 yeah that's right. Daily driven ss4. I'm that guy. Just looking to squeeze a little more out without going to a supercharger. You're the man btw.
@zacharyrussell6983
2 жыл бұрын
This video helped me a lot! I've got a 02 Camaro and am building a 6.2. I've sold the rec port heads off of it because I knew it was just getting a set of pistons. Now I feel that using my Cartek 243 heads was the right decision. Hopefully I can make 650hp.
@jasonhaley5737
4 жыл бұрын
The Mast head made the most power because of its mid lift airflow advantage over all of the other heads (between .300 to .600). Just goes to show that Mast really did their homework when they designed that head.
@Paulster2
4 жыл бұрын
At first blush, I would have thought just the rockers would have pushed the Mast heads over the top, especially when you consider these heads peaked and fell off sharply sooner than the rest of the heads ... however, there's always more to the tale. Looking at the flow numbers of the Mast heads, they outflow EVERYTHING on the chart by a large margin throughout most of the flow chart. It's no wonder these heads produced better results than the other heads. They would most likely have done that with 1.7:1 rockers, just not quite as large a gain.
@ERidParasoth
4 жыл бұрын
It means you have a baby camshaft in that engine!
@timothybayliss6680
4 жыл бұрын
I agree...doing this much work to run a hydraulic cam makes it hard to question how much power some of these heads will make with 800 lift and 8000 rpm.
@drivinwithdrew7676
4 жыл бұрын
Timothy Bayliss yeah the cam is small for the cubic inch, but I bet it would make a killer daily. It would be cool to see a similar test with a monster cam to see the difference, and maybe even hit 800 hp
@evcass69
4 жыл бұрын
6 of those heads had an intake port 20cc larger than OEM which I've read doesn't help air speed and thus only helps power in the upper RPMs. I was hoping to see recent aftermarket options like the AFR ls3 260, tfs 255, mamo ls3 260, and prc 255/260 to see if they offer better gains in the 3-4K rpm range for HPDE. I really hate paying for the FAST cathedral penalty when I already have a Rick Crawford rod mod ls3 intake.
@richardholdener1727
4 жыл бұрын
i have not run the modded LS3 intake, but would not spend money on the Fast ls3 intake over the stock one
@dagent6407
4 жыл бұрын
@@richardholdener1727 This is quickly becoming one of my favorite channels Richard, learning a lot , thank You Sir. Doing HPDE with my LS3 also and would love to see a comparoo like this on 376ci. I'm thinking your suggestion of TFS 225 heads would still be worth 35hp over the the stock LS3 heads and some extra power under the curve over something like TFS 255 or stock ported heads.
@jamesford2942
4 жыл бұрын
For me I prefer power in the low range with lots of low end torque. Unless you are all out racing, twisting the engine up to 7000 RPM is rarely seen in everyday driving. I like to have fun in my hot rod and that doesn't include driving around with 4:56 gears turning 5000 RPM on the freeway.
@stephenhodge6441
4 жыл бұрын
Good test but I really want to see more aftermarket rec port heads. Afr, trickflow, brodix, Edelbrock and maybe some promaxx for a value brand. And maybe I'm off base here but I think most people want to see what they will do on a bigger cubic inch engine but with fuel injection. I just don't see many people wanting to build carbureted LS engines compared to fuel injection.
@richardholdener1727
4 жыл бұрын
fuel injection and carburetion don't change what the heads do
@stephenhodge6441
4 жыл бұрын
@@richardholdener1727 completely agree but it would be nice to see the numbers on the setups people are building. Love the channel and not telling you how to do what you already do better than anyone else.
@peteJoseph-x3h
2 жыл бұрын
AFR and TFS LS3 heads, please.
@brentterry6476
4 жыл бұрын
Richard can I have this short block😁
@darrenadams3285
3 жыл бұрын
The 1.8 rockers allowed heads to get deeper into high flow lift numbers and spend more % of valve open above .300 lift
@hoonaticbloggs5402
4 жыл бұрын
You’d want the fast manifold on a road car.
@bill2178
4 жыл бұрын
Helluva nice torque curve with the fast and im assuming factory ly6 would be close i really dont think more lift is the key more than likely itsthe extra flow in the 3-500 area
@ProfessorCsATVs
4 жыл бұрын
So if we do a similar test under boost, stock LS3 vs aftermarket heads. Will the boost power be magnified even more do to the extra airflow? Or will the 30hp increase NA remain as a 30hp increase under boost?
@richardholdener1727
4 жыл бұрын
usually magnified x boost
@montecarlo6.0turbo
4 жыл бұрын
What kinda power 09 6.0 e1841p make with uncapped injecters
@Jordan_Rush
4 жыл бұрын
Hey Richard! I have a question.. Is it necessary to run a lower temperature thermostat? Does it help or hurt power? I have seen a people mention changing to 180 degree thermostats before the get a tune. What temp do you recommend ? Factory?
@richardholdener1727
4 жыл бұрын
lower temp makes more power
@Jordan_Rush
4 жыл бұрын
@@richardholdener1727 Thanks for the reply! What temp do you recommend for a GMC 6.2 l9h with a cam, headers, tune? Should I leave the stock temp? Or go down to a 180?
@baby-sharkgto4902
3 жыл бұрын
@@Jordan_Rushit is common to switch to a 160 for cam and head ls engines
@Jordan_Rush
3 жыл бұрын
@@baby-sharkgto4902 thanks for the reply. I went down and picked up a 160. Installed it. Data logging with HP tuners looks like running temp with a 160 thermostat is around 180. Always appreciate input!
@DavieJones_Lockr
4 жыл бұрын
I'm in the process of building a stout shortblock for my Silverado and im curious just how much of a difference you'll see in going from a 3.6 stroke to a 4.0 stroke in an LM7. would love to hear your thoughts. oh, and yes I would be selecting a different cam for the longer stroke engine but I wouldnt be changing the heads. I'm more concerned with power below 6500 being that's where a street truck will spend most of it's time and obviously have more weight to move.
@richardholdener1727
4 жыл бұрын
the added displacement will improve power everywhere-especially down low where you want it most
@johnclary729
4 жыл бұрын
Still hoping to see that tri-y vs long tube vs shorty headers with different intake manifolds. My race car needs good low and mid-range power and sometimes touches 6500 for like .5 seconds before hitting the brakes for the next corner.
@hondatech5000
2 жыл бұрын
Did you get a fast intake?
@johnclary729
2 жыл бұрын
@@hondatech5000 fast enough, I'm just looking for a little more low-end grunt and airflow at high RPMs
@hondatech5000
2 жыл бұрын
@@johnclary729 tbss or fast would do
@hondatech5000
2 жыл бұрын
@@johnclary729 my bad dude I just assume you have an ls of some sort. If you have an ls3 the fast isn’t worth as much. Just use long tubes I dunno if any tri y trickery would be worth it. If you need every average hp to 6500 the cross ram long runner intakes show good (probably the best on a lot of applications) “average power” to 6500.
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