Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
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Are LB9 and LO3 heads different? The reason I ask is because I have 2 friends. One has an 89 RS 5 speed that he converted to TPI from TBI, has an SLP Cam, cat-back, high flow cat and 3.73s. The other has an 88 IROC 305 TPI headers, cat-back, high flow cat, 3.70s and a ROD tranny. The thing is the RS is runs like 16.2 and the IROC runs 14.7, thats a 1.5 second difference, surely there has to some major difference, I was thinking different heads, does anyone know for sure what it could be??
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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End
There might be very little difference in chamber volume but a significant difference in port design and flow. Both engines are supposed to have similar compression ratios, so I would presume similar chamber sizes. This says very little about port design, however, and one of the heads may even have "swirlee" ports - you know - the ones that suck like water flowing down a drain...
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Later,
Vader
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"I'm'a do Things My Way - It's My way or the Highway." Adobe Acrobat Reader
[This message has been edited by Vader (edited March 18, 2001).]
