Hi Eric, Tim here (the bracket race lover, with my Pontiac)......another GREAT vid!!....i am SO glad i subscribed......i dont subscribe to anything, i have you and 1 other i like to watch......your attention to detail and ability to explain, are refreshing, and i really dig it!!...TY sir!!!......keep portin!!!!
@chuckvanvleet1268
2 жыл бұрын
Keep kicking ass. Great job
@timothybayliss6680
2 жыл бұрын
That head looks like it has a pretty good chamber for a 23° conventional layout. 300cfm from a head smaller than 220cc is really respectable when you consider it uses stud rockers. It still seems like a small head for a 420 inch engine.
@KingJT80
2 жыл бұрын
This would be right at home on a 10.5: 1 pump gas 383 that shifted at 7000
@konnerkramer329
2 жыл бұрын
@@KingJT80 thats funny because im putting these heads from chad spiers with his valve job and port work on a 11 to 1 383 with a 6,500-7,000 redline
@michaelsettle1789
2 жыл бұрын
I am putting these in a 72 chevy street truck I wanted low end grunt with my 421sbc. Max rpms around 5800
@mikeday8826
2 жыл бұрын
67-72 is my favorite body style. I had a 71 with some dart shp heads on it. Sold it a few years back. Kick myself in the ass every day lol. They are getting hard to find....these heads should be perfect for what you want. Good luck with the build!
@jrod264winmag
2 жыл бұрын
@@michaelsettle1789 Is that a cnc Motorsport 421 you got.
@zAvAvAz
6 ай бұрын
What if the D port exhaust ports were upside down? i am see no reason really that the open corners should be on the floor? i am notching out a 358's bore for a really super huge intake valve and smaller exhaust valve than usual. Looking at profilers for the candidate. Shall it work? Plan on using a PRW 1.65:1* roller rockers. They have exaggerated off the seat lift in their ratio arc. Like nearly 1.8:1. So it should be interesting with the short timing on this build. Looking at keeping the runner CC as small as possible still and probably starting with the 185's. Looking to concentrate on low and mid lift flows with the numbers climbing steady for stable port like you said. Thanks a ton eric. This is one of the best comparisons ever.
@paulseabrook8179
2 жыл бұрын
I'm new to this channel. I happen to see a video of valve train at 6000rpm. Valve action is quicker than you can blink. Not open very long.
@timrayburn2461
2 жыл бұрын
Great video Eric
@donbenson2099
Жыл бұрын
The lub is not the problem for a new cam going flat. Take a new lifter wipe the bottom off drag your finger nail across it take a pencil and drag it across the lifter you can feel the file as it is filing the lead off of the pencil along with your finger nail. A ground surface is a poor finish. Now take a sheet of red crocus cloth and a old phone book or soft back book `put the sheet down face up. Now take the lifter an rub it in all directions tilting it as you go (a lifter is crowned) until it is smooth like a piece of glass now run your pencil across it it is now longer a file and will not file your cam lobes down, a new lifter is a file. Without doing this what happens is after a cam is run softly for a while, (without polishing the lifter) it finally wears the grind marks off off of the lifer. If you are running real heavy springs a lot of racers will pull the inner spring out to cut the pressure on the cam lobes. When resizing con rods leave the bore 2/10 under sizer wrap crocus cloth around the mandrel then do the pencil and `finger nail test, now you will not have bearing material transfering and killing the oil clearance. Think about this crank shafts are polished after grinding. Me, a long time machinist in large machine shop doing ship repair, paper mill, mining equipment, saw mill, and a GT1 road racer driving a Camaro . This something I have just kept to myself over the years. Have fun, Don
@franciscohuerta9860
2 жыл бұрын
nice vid Eric wats your opinion on the promaxx n nbk heads even the blue prints for sbc street car
@paulthompson1654
2 жыл бұрын
hi minimum cross section area or pinch point [pushrod ] A more accurate way of comparing heads as it will have a big influence on air speed . Many head makers /porters use a max air speed vs mcsa vs port length to determine head size application 200 cc ford sb head has around the same flow as a 220 chevy sb head and similar MCSA dyno time proves they perform about the same . A sb chevy 200 cc head cannot keep up with previously mentioned . Prior mentioned stats 400cuin were all from the same dyno and same owner
@cfmechanic
2 жыл бұрын
That head looks very similar to a brodix dragon slayer
@shanerorko8076
2 жыл бұрын
What engine size is typical for this head? 383ci?
@WeingartnerRacing
2 жыл бұрын
383 but really any size depending on rpm
@haydenleach7712
2 жыл бұрын
Do you believe this haed would work well on a boosted 383?
@TheProchargedmopar
2 жыл бұрын
👍💪
@docsmallblock6584
2 жыл бұрын
My Pro-filer 195's are a 1206 intake gasket straight from the factory? What state are you located in?
@WeingartnerRacing
2 жыл бұрын
Oklahoma
@carolinaborn2054
2 жыл бұрын
Could you achieve similar results with Trickflow 195cc head? Kenny Dutwieller signature series.
@WeingartnerRacing
2 жыл бұрын
Probably not but close.
@carolinaborn2054
2 жыл бұрын
@@WeingartnerRacing ok thanks for answering.I already have them on a 406 which runs great.Just wanted to see if I could improve on those instead of buying bigger heads.
@paulthompson1654
2 жыл бұрын
hi 227 afr 2.34 MCSA 400CI peaks 6800--7000rpm XX air speed Afr 220 2.180mcsa 400cuin 6500rpm peak 195 afr 1.93 mcsa 400cuin 5800rpm peak All above done with the same peak airflow speed
@jrod264winmag
2 жыл бұрын
What is mcsa
@ratherbeboating10
2 жыл бұрын
Oh don't do this to me and make me spend more money on my build lol. All kidding aside, you can just take my money now...
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