GT 454 --- 781 or 236?

Chipper Chapman · 01-29-2012, 11:32 PM

What would be better combo in a heavy ride (37-3800#) 781 oval port combo @ 370hp or 236 'peanut' port @ 341hp?

Adger Smith · 01-30-2012, 09:56 AM

From the NHRA allowed SS cylinder head port vol chart (CC's)
236 head 225 in 116 ex
781 head 256 in 114 ex
Ok, will 31 more CC in the port increase the flow and make up for the 29 HP and the extra weight you will carry? You make the call!

01-29-2012, 11:32 PM	#1
Chipper Chapman Member Join Date: Jan 2004 Location: Belmont N.S. Canada Posts: 473 Likes: 246 Liked 166 Times in 71 Posts	GT 454 --- 781 or 236? What would be better combo in a heavy ride (37-3800#) 781 oval port combo @ 370hp or 236 'peanut' port @ 341hp?

01-30-2012, 09:56 AM	#2
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: GT 454 --- 781 or 236? From the NHRA allowed SS cylinder head port vol chart (CC's) 236 head 225 in 116 ex 781 head 256 in 114 ex Ok, will 31 more CC in the port increase the flow and make up for the 29 HP and the extra weight you will carry? You make the call! __________________ Adger Smith (Former SS) Last edited by Adger Smith; 01-30-2012 at 09:58 AM. Reason: sp