HP Gain?
Thread Starter
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
HP Gain?
Hello everyone. I posted this in the wrong forum before. I couldn't figure out how to move it so I'm posting it again here.
I want to purchase a 400" SBC and bolt on my heads, intake, headers and exhaust to it and get a retrofit roller cam that would be good up to 6000-6500 RPMs.
My 350 put down 344 rwhp 343 rwtq running slightly rich on the dyno and has the following mods: Miniram, 58mm throttle body, AFR 195 Eliminator Heads, Hooker Long tube 1 3/4" headers, Corsa true dual 2 1/2" exhaust with H pipe, flat tappet cam (224*/224* @ 0.050", 0.528"/0.528" with 1.6 roller rockers, 112* LSA) 10:1 compression, MSD 6AL2 ignition box.
So what I want to know is about how much HP I can gain by going to the 400 with a matching retrofit roller cam and porting out the Miniram a little bit more?
Thanks!
I want to purchase a 400" SBC and bolt on my heads, intake, headers and exhaust to it and get a retrofit roller cam that would be good up to 6000-6500 RPMs.
My 350 put down 344 rwhp 343 rwtq running slightly rich on the dyno and has the following mods: Miniram, 58mm throttle body, AFR 195 Eliminator Heads, Hooker Long tube 1 3/4" headers, Corsa true dual 2 1/2" exhaust with H pipe, flat tappet cam (224*/224* @ 0.050", 0.528"/0.528" with 1.6 roller rockers, 112* LSA) 10:1 compression, MSD 6AL2 ignition box.
So what I want to know is about how much HP I can gain by going to the 400 with a matching retrofit roller cam and porting out the Miniram a little bit more?
Thanks!
Drifting
Joined: Oct 2005
Posts: 1,916
Likes: 48
From: Angier nc
Can't comment on HP as I know nothing about the limits of a Mini Ram.Make sure you drill the steam holes in the heads for a 400.
I would wager a larger cam and more lift to take advantage of the AFR heads.
I would wager a larger cam and more lift to take advantage of the AFR heads.
Safety Car
Joined: Sep 2001
Posts: 4,155
Likes: 553
From: Glenbeulah Wi
If you build the engine with the necessary parts to achieve the same rpm band as the 350 ran it should have a power increase about the same as the displacement change. So 344 should go to 393 rwhp. That being said a mini ram 400 running to 6500 rpm with the correct combination of parts should easily make 400 plus hp to the tires.
