When building a Pontiac 400 or really; any Pontiac engine on the cheap you need to look at few things; namely the camshaft and exhaust. If you’re running anything lower than 8.5:1 you’ll want to increase compression to 9-9.5:1 by changing pistons or changing the heads.
The gains are assuming you’re using a standard Pontiac 400 out of a big car like a Bonneville or Grand Prix. If you’re already starting with a Ram Air III setup you’re ahead of the game.
The recipe is as follows:
– Stock Pontiac 400
– Stock Pontiac #16 Heads
– Melling “041” camshaft 231/240 .470/.470 112/115LSA
– Stock Intake
– Stock Carb
– 1 3/4″ Headers w/ straight pipes
🔴Affiliate Link For JEGS🔴
https://jegs.ork2.net/LSxHunter
______________________________________________________________
🌎Website – https://lsxhunter.com
👕Merch – https://teespring.com/stores/lsxhunter
🔊Playlists:
1967 LeMans – https://www.youtube.com/playlist?list=PLmGAeNGAR8W5eOyQRtngRRIH4Zzypwf_x
1965 GTO – https://www.youtube.com/playlist?list=PLmGAeNGAR8W5o7BeUGwriWwnvsjQZDU-8
1978 Firebird – https://www.youtube.com/playlist?list=PLmGAeNGAR8W5DVb7E4tJUlQ-RIPBzc9AZ
🙋♂️Join Us on FaceBook:
Facebook: https://www.facebook.com/lsxhunter
Group: https://www.facebook.com/groups/lsxhunter
🛒Want to support LSxHunter? Affiliate Links Below!
Jegs – https://jegs.ork2.net/LSxHunter
Amazon Tools – https://amzn.to/2K9moHU
Amazon – https://amzn.to/2UBMRjC
Dragy – https://amzn.to/2z71qnJ
){kind=link}
Bigger cam and more compression
I have a 79 trans am 400 w72 4 speed car with 373 rear gears. I want a performance rebuild useing the stock intake carburetor and heads. What cam and piston size do you recommend?
Would you do same with 72 grand prix?
This build work on a 1967 firebird 400 motor?
What can you recommend for a pontiac 400 with 670 heads
I have a stock 1968 400. 030 over #16 heads 3.36:1 rear end, Automatic I might take to the track I dont know yet,, but like to bomb around town at the moment there is going to be a 268H cam going in it, would this be OK or is there something better, I have a 280H in my chevy 462 thats in my firebird at the moment and I was thinking the same for the 400 but someone mentioned that that may be to much for the 400 good for a 455 but not for a 400 any advise would be great
No way it makes 400hp
What’s the compression ratio?
I need all this done to the 400 that’s in my 69 Firebird lol
will these mods work on the 75 formula 400
I'm running a 400 with eldebrock Performer Intake, 6x heads, headers,full magnaflow exhaust and a Holley EFI. How much ballpark hp do you think I have? Not original block so can't really give you that info since even I don't know
I am a bit late to this post. I have a tired, never rebuilt 400 ram air 3. She is not #'s matching but is period correct for my Goat. I'm aiming at 450 hp in either a full rebuild or a ls build. I'm looking for a strong street car that I could take on multi state trips with the family. $ for $ what is the better way to go? I have very little experience in wrenching however I did want to get my 8yr old son involved with this as I want him to have the same love in Muscle Cars. Thoughts?
Is it possible in a Pontiac Formula 400 1974 with 4x head? I have a edelbrock aluminium performance intake,, large exausting and EFI.
My favorite is 068 cam for street use.