383 vs 440

Chipper Chapman · 07-20-2014, 06:57 PM

Helping a friend out and we are torn at what will be better for him. We've both always heard the old stories of the underdog 383 walking on the 440 4v "back in the day". So I've read that any given cylinder head can support X amount of hp regardless of engine size. So what we want to accomplish is a 66 coronet back half car that is done old school Superstock for our local series. My question is that given the 383 or 440 both have the same induction (ported factory iron, no fancy stuff) and relatively close compression, how much hp would he be giving up with 383? There's a 5 tenth difference in index here!

07-20-2014, 06:57 PM	#1
Chipper Chapman Member Join Date: Jan 2004 Location: Belmont N.S. Canada Posts: 473 Likes: 246 Liked 166 Times in 71 Posts	383 vs 440 Helping a friend out and we are torn at what will be better for him. We've both always heard the old stories of the underdog 383 walking on the 440 4v "back in the day". So I've read that any given cylinder head can support X amount of hp regardless of engine size. So what we want to accomplish is a 66 coronet back half car that is done old school Superstock for our local series. My question is that given the 383 or 440 both have the same induction (ported factory iron, no fancy stuff) and relatively close compression, how much hp would he be giving up with 383? There's a 5 tenth difference in index here! __________________ Chris Chapman 1969 Chevelle NHRA F-G/SA 1090