89 iroc heads on lo3

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Sep 18, 2003 | 09:45 PM

thehagg

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89 iroc heads on lo3

just wondering how a set of 89 iroc 305 tpi heads would do on a lo3. i have a l98 cam to go with the heads ,ultimate tbi mods, headers with 3 exhaust , and a ed wright fastchip. also a 342 gear

Sep 19, 2003 | 01:21 AM

vjo90RS8

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Joined: Jul 2001

Posts: 1,828

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From: San Jose, CA

Car: 2002 Z28

Engine: LS1

Transmission: 4L60E

Axle/Gears: 3.23

the 305 TPI heads are better than the L03 heads and with some porting they should give you a nice gain, especially with the other mods you have listed.