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Fostang · 12-22-2001, 10:12 PM

flow numbers go as follows in 28" of h20

289-302 heads

1.78 intake valve 1.48 exhaust

intake
.100-49.9 .200-91.2 .300-132.5 .400-154.5 .500-168

exhaust
.100-41 .200-71.6 .300-95.1 .400-110.7 .500-120.1 .600-124.8

e7ta-aa

same valve size

intake
.100-55.4 .200-101.3 .300-140.9 .400-150.8 .500-164.6

exhaust
.100-42 .200-78.9 .300-102.4 .400-110.8 .500-114.2

They can flow much better with a mild home port. Hope this helps. Also since your compression will be raised you'll be adding about 10 hp from the point gained. Add that to the porting another 10-15 and you've got some nice numbers there.

12-22-2001, 10:12 PM	#8
Fostang Registered Member Join Date: Feb 2001 Location: Stockton, Ca Posts: 599	flow numbers go as follows in 28" of h20 289-302 heads 1.78 intake valve 1.48 exhaust intake .100-49.9 .200-91.2 .300-132.5 .400-154.5 .500-168 exhaust .100-41 .200-71.6 .300-95.1 .400-110.7 .500-120.1 .600-124.8 e7ta-aa same valve size intake .100-55.4 .200-101.3 .300-140.9 .400-150.8 .500-164.6 exhaust .100-42 .200-78.9 .300-102.4 .400-110.8 .500-114.2 They can flow much better with a mild home port. Hope this helps. Also since your compression will be raised you'll be adding about 10 hp from the point gained. Add that to the porting another 10-15 and you've got some nice numbers there. __________________ 67' Fastback-Supercharged 4.6 DOHC Cobra, T-56, 8.8 more to come. 67' Coupe-EFI, AOD, 8.8 90 Gt-Supercharged,MAF,TB,1.7's ripper, bassani x, 3.55's, 01' cobras, headers. 89'GT-Supercharged,Heads,Cam,Intake,TB,MAF,power pipe,headers,offroad exhaust,black bullits.