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Unit 5302 · 01-16-2002, 10:53 PM

With a full port and polish along with CNC work and larger valves you can get a set of E7's to flow much better than stock GT-40s. About 220cfm to 185cfm.

I also read gtsr515 as saying GT-40 heads would give you 8 tenths. I agree you could pick up 8 tenths with a GT-40 head/intake package with some 1.7's on the stock cam and a couple other little mods. Then again, for $200 less, you could do close to that with ported E7s.

I would spend my money on new heads rather than porting too, though.

01-16-2002, 10:53 PM	#21
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	With a full port and polish along with CNC work and larger valves you can get a set of E7's to flow much better than stock GT-40s. About 220cfm to 185cfm. I also read gtsr515 as saying GT-40 heads would give you 8 tenths. I agree you could pick up 8 tenths with a GT-40 head/intake package with some 1.7's on the stock cam and a couple other little mods. Then again, for $200 less, you could do close to that with ported E7s. I would spend my money on new heads rather than porting too, though.