If I remember right the spread bore intake that came off my 82 diplomat police car engine was aluminum, that engine ran pretty strong for the era it came from, way stronger than the 2bbl 318 that was in my 1981 Newport, it was a total slouch but the cop car 318 would really wake up when that big ol thermoquad was opened up ,and with the lid flipped what a crazy roar that carb made! I loved it. Back when I was 19 (in 92) I did take a 318 from a 79ish Aspen wagon did a rering tossed a mild summit street cam in and used that diplomat cop car intake and a quadrajet, retrofitted the non leanburn electronic ignition from an old dodge van and stock exhaust manifolds no cats and dual 2" exhaust and a non lockup 904 with a slant 6 converter and that mild combo ran really strong for a mostly stock 318, I put it in that land yacht 81 Newport and it would push that thing good, there was a monster hill in my area hit the bottom at 55 and newport bone stock floored kicked down it would maintain 55, I did just the exhaust and it would be at 65 at the top actually huge gain for just from a de carted dual exhaust, I did the engine up with what I listed above and 55 at the bottom at the top the speedo was pinned at 85 so I don't know if it was more, that's a crazy improvement in power from just uncorking and engine and a 4bbl swap. That mild combo in a small car like a dart or a duster would actually be a fun little tire melter. The Newport had a tow package so it had a limited slip and it would do some chirping floored from a dead stop. I thought The car looked pretty cool I thought, champagne paint brown vinyl top, 5 oval 15" ralleyish style cop car wheels with trim rings 235/60 copper cobras, nice n low with saggy rear leafs and loosened up tortion bars, and it had a maroon overstuffed crushed velour interior with a sofa back seat, great feature when your 19!. Even with the cool cars n trucks I've had and have Its still one of my favorites, I would so love to have that exact car now for my daily driver. No it wasn't "fast" in the world of hot rods but being a kid back then it did seem decent to me and several people were like wow this is way faster than I thought it would be so... but for a super cheap build a guy can have fun budget car and with a slightly bigger cam an aftermarket intake, a set of long tubes you could probably add another 20hp? Some diy porting could go add another 10? maybe a bit more? Total HP no idea maybe 250 crank? I dunno but Plenty to melt tires n make noise. Sorry bout rambling n rambling it's a bad habit of mine when I get nostalgic lol.
@Robs-Garage-experiments
7 ай бұрын
MoPar never had an OEM aluminum intake on the 318 in those years of the LA. I do think it includes the earlier poly years. Get story though. I like it!
@deanmoser5907
7 ай бұрын
This 318 has been a mess of a project. I dont think anyone has the same idea. I lost interest ages ago but what you have done for your end of the bargain has been great and very interesting. Well done for putting in the time and expertise.
@servediocylinderheads
7 ай бұрын
Thank you
@bcbloc02
7 ай бұрын
There are 2 things that are a no brainer when hot rodding the v8’s of yesteryear and that is that running a 4bbl and long tube headers is guaranteed to offer you the biggest power gains for the dollars spent.😊
@brianlevan339
7 ай бұрын
Thanks Charlie ! I dont like what happened with Mission Impossible,not using stock parts but it introduced me to your channel and i will continue to watch and will help me with upcoming projects.
@servediocylinderheads
7 ай бұрын
Yeah, I am sure I didn't help... but I did have an idea....what if the first dyno test is a bone stock new cam and then move up to the mean cam? I will run it by David and see what he thinks. Thanks
@fredflinstone4663
7 ай бұрын
Charles thank you for all your beautiful work on the 318, it really helps people who wants to play around with all small Mopar stuff with all this great information. I also appreciate the great work your testing of manifold options and designs have contributed . Funny thing i have a project atm with 318 /360 intake manifolds i have chopped and welded from new victor junior single plane and duel plane rpm to fit a studebaker blown engine . These manifolds fit up port wise really well. Also going to try a pressure boxed thermoquad with the vortex. Thermoquards are so underated love them. Go the thermoquad love Robs shirt!😊
@servediocylinderheads
7 ай бұрын
Love this! Keep up the good work!
@bobbyoshomebuilt2544
7 ай бұрын
Good stuff, thank you for letting us see it.
@servediocylinderheads
7 ай бұрын
You are welcome
@hunnybunnysheavymetalmusic6542
7 ай бұрын
I have an Edelbrock which was supposedly for converting either a 318 or a 360 from 2 bbl to 4 bbl. Not sure what I'm ever gunna do with it, but I'd consider trading it for a set of 440 heads [even the poorest quality cast heads ever made] so I can put some 440 heads on my 413 motor home and get rid of the high rise water pump layout so I can put it into a Dodge Dart or some such. I can port them myself, as well as any other work related to performance upgrades, but mainly, I just want to have a motor that doesn't have a water pump sticking up through the hood.
@Mike-xt2ot
7 ай бұрын
Big gains can be had by milling a couple holes and thread the holes for shallow pipe plugs in the problem areas. This will give access for porting and enlarging inner ports for more volume and blending the sharp turns as much as possible. You'd be suprised of how much iron that can be removed. Its done alot in pure stock circle track engines .
@servediocylinderheads
7 ай бұрын
I have done this but not with Iron manifolds. I even have a video or two on this. Thanks
@jonathoncouchey7151
7 ай бұрын
The last spreadsheet manifold made into th late 80s flows really well and can be ported out to really flow along evenly when compared to the edel Bork intakes.
@Anarchy-Is-Liberty
7 ай бұрын
Spreadsheet manifold? That's like saying: Wee-and! ROFL!!
@servediocylinderheads
7 ай бұрын
I like Wee-and... can't say Why-and...
@TimothyArnott-m7z
7 ай бұрын
Charles, You've lost what UTG was tryin to achieve......yea, the 4bl intake flows WAY more....DUH!!.......the intent was to use the horrid 2 bl, and see what cud be done......all the idea behind mission impossible has been lost......the challenge was to use awful OEM stuff, and try for 1hp/cube..... .its a no brainer to use a 4 bl, or a weiend intake, NOT what the challenge was.... . I'm with UTG, not Against ANY of ur OBVIOUS tallents.....just NOT what he wanted to see if........no offense, not tryin to attack......the original scenario has been put to the wayside......what cud the 2bl intake do???...we'll never know, cuz u just jumped to the 4bl.....and again, DUH, it works better....the initial challenge has gone away.....doesnt anybody think the original challenge was neat??.....probably NOT doable, but was a SUPER cool challenge.......who cares about tossin an aluminum 4 bl intake on it.....OF CORS its gonna perform...NOT the challenge.....PEACE to you sir!!
@servediocylinderheads
7 ай бұрын
The original design is the low rise dual plane and bbd. All together flow 160 cfm at .6" lift. If we multiply that number by 2 it is 320 hp. I think that is pretty close to the original intent was of the mission impossible. The other intakes and we test a few if for information only. Go four barrel!
@davidreed6070
7 ай бұрын
I thought they are going to use the stock parts and then change progressively to better parts. Have I misunderstood?
@servediocylinderheads
7 ай бұрын
@@davidreed6070 No, you are correct.
@servediocylinderheads
7 ай бұрын
Look at the flows from thelow rise dual plane with the bbd going through the head as the original challenge or phase 1. I did three intakes for this project.
@Robs-Garage-experiments
7 ай бұрын
The union of UTG and David V on the project was dissolved long ago. The intent of making 318 HP from a 318 cid engine using the 2bbl carb and intake is still going forward but not exactly as UTG wanted to. UTG said he do it his way later on after DV is done with this. Check out UTH’s channel for more on the topic. He did a good video.
@approachingtarget.4503
7 ай бұрын
The biggest hurtle from flow bench numbers to a running engine is the window time and how much air flows through it. The window time is the valve event. Increasing duration allows more air in than the flow bench will measure. You can add up your totals from your graft Guy's and cone out to an average. But the engine with more duration will transfer more air than the average. I have found that .227° of duration is the sweet spot for engines in that 400ci range. So for a 322, the sweet spot will be around .214°. That number can help determine if you're going to get more flow into the cylinde, s then the flow bent reads. You can figure use 214 as a zero point. For each degree away from zero. 3% of increase or decrease in flow on a running engine will be observed. The typical 340 TA cam with .224° will flow almost exact to the stock LA head flow numbers. The mission impossible 318 should break 1hp per cubic inch even with the BDT if the cam is .227°. That's 13% more airflow than your recorded flow bench numbers. Once you guys upgrade to a single plane and good carb. Your flow numbers will provide 460 with a .227 cam under 7000 rpm. I know for a fact because our super stock motor from the 1990s produced 445 with a KD 500cfm 2 barrel, and we made 470hp at 8000rpm on the same combo with a unrestricted 775 Demonand M1 intake. Granted we achieved this with 2.o2 valves and 8mm stems. So adjust accordingly.
@servediocylinderheads
7 ай бұрын
Good info. Thanks!
@UnityMotorSportsGarage
7 ай бұрын
The Stealth is pretty much a copy of the LD4B but the LD had 273/318 size ports at the face
@servediocylinderheads
7 ай бұрын
Good info. Thanks Andy!
@jojo-pt8sx
7 ай бұрын
Funny/thanks for saying that cause I’m watching this and thinking that stealth looks EXACTLY like the LD4B I have on my 273 commando. Mystery solved!!
@servediocylinderheads
7 ай бұрын
@@jojo-pt8sx Nice. Thanks
@daledavies2334
7 ай бұрын
Charles, how reliable do you think the textured valves will/would be? Could they develop stress risers from dropping on the seats. I realise they should sit on the seats fairly gently.
@servediocylinderheads
7 ай бұрын
I think the way I did them they will have no issue. Thanks
@jonathoncouchey7151
7 ай бұрын
Charlei, i think you would like to stock tbi intakes, which are midrise, and the 80s 4 barrel iron intake, which is much more of a midrise. Ports are very forgiving, and if you are porting. You only really get an upgrade with a good single plane.
@servediocylinderheads
7 ай бұрын
I did one for this project. Check older videos
@bobbyz1964
7 ай бұрын
As far as the Stealth goes, I've got one, takes a few minutes to match it to a 273-318 gasket, a little longer for a 340-360 size. Running 315 heads (273 close chamber) on my 318 with a 68 340 intake. I opened the heads up to match that intake as cast. Once matched it to a 318 size gasket, it was just a cut less than a 1/4 on top, port sorta ramps down there. Going all the way to 340 gasket size is more cutting, didn't see much point in that. Heads have 1.88-1.60 valves now and I ported them. No idea how they flow, but it made me feel better. Hell, I might've made them worse. 🤣
@servediocylinderheads
7 ай бұрын
I doubt it!
@20alphabet
7 ай бұрын
I recall reading something a guy wrote about the 318 LA in particular. He said the best intake manifold was a Weiand, can't remember which one though. It had to do with firing order and pulses that far surpassed the importance of overall flow. I'll try to find it so my next comment will be more informative.
@servediocylinderheads
7 ай бұрын
Please do. Thanks
@20alphabet
7 ай бұрын
After looking a bit into it to refresh my memory it seems to be the Weiand Action Plus. I'll have to delve more into it to locate the article that explained why. Flow wasn't the main benefit, but how the valve opening effected the next cylinder charge.
@dadalebreton184
7 ай бұрын
Without a flowbench, the common backyard can acheive what numbers? Everyone can put a grinder in but, how much is too much?
@servediocylinderheads
7 ай бұрын
It is a good question. I was thinking if I have time D.V. has the other 675 head. I could do a quicky port and find out what it will do with stock sized valves. Minimum time, zero developement. I bet they would break 200 cfm. I know E7's do because I did that experiment. There is a video somewhere. Thanks
@dadalebreton184
7 ай бұрын
Ive seen my cousins done it for years on there 340's, 400's, 440's. Back then they didn't bother with the 318 that was pulling there trailers. But did dye grind everything else. I always tought bigger is better before I listen to David's and your expertive work.
@servediocylinderheads
7 ай бұрын
@@dadalebreton184 Bigger isn't better? Hahaha
@panthermadness4232
7 ай бұрын
The pre China manufactured stealth intakes were as good if not better than the Edelbrock performer rpm intakes for any of the engine makes..great street manifolds.
@servediocylinderheads
7 ай бұрын
Good point. Thanks
@smilsmff
7 ай бұрын
Now I wonder what about the Later years 318 police 4 BBL design from factory?
@Robs-Garage-experiments
7 ай бұрын
I like that line of thinking
@servediocylinderheads
7 ай бұрын
I bet they are pretty good for factory stuff. Thanks
@jonathoncouchey7151
7 ай бұрын
Charlie, you did your part on the stock heads. Bot inky that but even on the aftermarket parts you are teaching us. In a side note. I need to looke for thise modifying bbd videos so i can get a good modified bbd for my beothers truck. Obviously we will keep a good running stock bbd to run as well.
@servediocylinderheads
7 ай бұрын
Thanks
@TheProchargedmopar
7 ай бұрын
👍💪
@jdvintageauto2958
7 ай бұрын
I hate to say it, but this comparison was kind of pointless. Do you have a factory 4 barrel intake to compare with the Stealth? Or even an action plus? I've done this comparison many times with customers. I had a 428 FE come in the shop, the customer had bought and wanted installed A Performer intake. It had smaller ports and runners than the factory intake. I've done the same comparison with SBC 4 barrel intakes. The only apparent advantage was less weight. Regardless I appreciate your efforts, but let's compare Honey crisp with red delicious.
@servediocylinderheads
7 ай бұрын
I doubt you will enjoy the next few videos. Sorry, the point is even with ported low performance heads an aftermarket intake is a no brainer.
@jdvintageauto2958
7 ай бұрын
@@servediocylinderheads nothing to apologize for. In this case, yes an aftermarket 4 barrel intake is better than a stock 2 barrel intake. I guess unless it's a 6 barrel manifold, this is always the case. I make my case again that maybe a better comparison is a factory 4 barrel v.s. an aftermarket. It was not my intent to convey negatively on your work, but a constructive criticism. I learn from the work you do, that's what I enjoy. I just don't think aftermarket is ALWAYS the answer. I've certainly had to correct fitment and quality issues on aftermarket items more than factory. castings.
@Robs-Garage-experiments
7 ай бұрын
I did say at the beginning of the video….. This was for fun and to bring up topics of just simply bolting on an intake and the port mismatches that happen. Glad you brought it up. I do have a OEM ‘72 4bbl intake.
@jdvintageauto2958
7 ай бұрын
@@Robs-Garage-experiments my apologies, I didn't catch the "just for fun part". In my defense I was smoking a brisket at the same time.😁
@jackwillson8099
5 ай бұрын
Did this motor ever get to dyno
@servediocylinderheads
5 ай бұрын
We don't even have a good block to start machining...
@No1414body
7 ай бұрын
Looks like the stealth is good for 400 hp, I'm thinking that m1 is the one you want
@servediocylinderheads
7 ай бұрын
They will not see the Mission Impossible dyno. It was just to see what different designs do and change.
@4speed3pedals
7 ай бұрын
It is pronounced Why And, not we en. Look at the box, it used to be printed on it. Uncle Tony's Garage pulled out of Mission Impossible when he found out that the use of non stock 318 parts were planned to be used. IMHO, his idea would have been a lot of labor spent for nothing. It was his original idea though and I think engine as well. You would think that he would have called a meeting of the minds. You have done a ton of experimenting with the heads. It just shows that aftermarket is the real way to go for less time and money overall being spent. Time is money.
@servediocylinderheads
7 ай бұрын
No doubt! Thanks
@bobgyetvai9444
7 ай бұрын
Uncle Tony is a idiot . I wouldve Never entertained his thoughts At All . Who with a 318 wouldnt put 340 or 360 heads on there if they were available ?? EVERYBODY WOULD !!! To Davids credit he took the challlenge but dam what a bunch of WORK !!! As to that 2bbl carb why not a Holley rather than that lawnmower refuge ??
@servediocylinderheads
7 ай бұрын
@@bobgyetvai9444 It is a lawn mower carb!
@bobbyz1964
7 ай бұрын
I'll have to look, but i think the older two barrel intakes were different, I mean the dual plane ones. That one really looks horrible.
@servediocylinderheads
7 ай бұрын
This is an egr manifold. Terrible.
@TDMP-ThemDamnMoparPeopleTy
7 ай бұрын
Why doesn't anybody ever mention the Stealth's googly eyed ports? The one I had, and every other one I've ever seen suffered from it. Of course it can be fixed, but that should have been done by Weiand long ago. I have to think it would have helped sales. I sold mine to 318WillRun, cheap, because back then I just didn't want to mess with it. Not sure if he's done anything with it over the years. I would love to see some other small port intakes flowed on these heads, though. Stock 340 or even 360, Performer and LD4B come to mind, maybe even a Street Dominator. I'm running RPM Airgaps on both my smallblocks right now. A 410 with CNC Speedmasters Larry Smith touched up, along with porting that intake, and a stock one on a 360 with stock J's. There is a pretty bad mismatch to the 915s. I didn't realise how bad until I scoped it after it was in the truck. I was surprised, and feell stupid for not catching it! I plan to remedy that by porting another set of 915s with 11/32 2.02/1.60 valves, so I've been glued to this series! Thanks for such a comprehensive look at the progression.
@servediocylinderheads
7 ай бұрын
You are welcome.
@Jim-ic2of
6 ай бұрын
Pour yourself a glass of Wiend !😊
@servediocylinderheads
6 ай бұрын
Oh sure, you make fun of how we talk!
@Jim-ic2of
6 ай бұрын
@@servediocylinderheads Not my intention . Just having fun with you guys . 😎
@servediocylinderheads
6 ай бұрын
@@Jim-ic2of Funny!
@calvincrews3885
7 ай бұрын
The Mopar 318 LA can go up between 5500 and 6000 RPM it doesn’t have to be spectacular it just wants to run with the 340 and 360 small block Mopar V8 engines as it can
@servediocylinderheads
7 ай бұрын
100% stock I bet. No issues. Thanks
@No1414body
7 ай бұрын
The bad is possible good for 330 hp, if they modify it to a single blade it could do alot better
@servediocylinderheads
7 ай бұрын
I hope so! Thanks!
@SimonBrun-m3z
7 ай бұрын
Mission impossible is the hard job too do not finding parts and put on
@servediocylinderheads
7 ай бұрын
You may need to pay more attention. None of these manifolds will be dynoed. This is for info only on different designs on the Mission Impossible head.Thanks
@TheFlash-cat
7 ай бұрын
what a joke this is not mission impossible 318. 🤬
@servediocylinderheads
7 ай бұрын
You are 100% right. It is to demostrate the advantages of different intake designs even with a worked up stock head. It just uses the Mission Impossible cylinder head so I can use it in the title.
@thegdfp6447
7 ай бұрын
UTG's MI 318 project was hijacked and murdered. Buying parts and sniffing farts, isn't what it was about.
@servediocylinderheads
7 ай бұрын
Sorry you feel that way. I fought to use stock valves and even the open chamber heads. I feel I succeeded, but the dyno will have the last say. The original challenge is the bbd, low rise dual plane and exhaust manifolds 1hp / cubic inch.
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