Cylinder Head Runner Volumes

Ed Wright · 12-20-2008, 08:55 PM

Rich, I did a set of quicky LT1 SS heads myself last spring when I got a wild hair to go SS racing again (In like three weeks, I'm not real bright.). I had two sets of salvage yard castings, all poured very close to each other. NHRA said 175 cc intakes, all of mine were very close to 170. Exhausts were about 5 small also. I can't imagine how a set could be 165 cc. Even a valve job would not make them that much smaller.
Had the intake gasket surface been cut? Were your end chambers smaller than the centers? All four of mine were, like over 1/2 cc.

Sending one set to Dave Layer was a very good move. 40 ftlbs better than mine.

12-20-2008, 08:55 PM	#22
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Cylinder Head Runner Volumes Rich, I did a set of quicky LT1 SS heads myself last spring when I got a wild hair to go SS racing again (In like three weeks, I'm not real bright.). I had two sets of salvage yard castings, all poured very close to each other. NHRA said 175 cc intakes, all of mine were very close to 170. Exhausts were about 5 small also. I can't imagine how a set could be 165 cc. Even a valve job would not make them that much smaller. Had the intake gasket surface been cut? Were your end chambers smaller than the centers? All four of mine were, like over 1/2 cc. Sending one set to Dave Layer was a very good move. 40 ftlbs better than mine. __________________ Ed Wright 4156 SS/JA

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