Black5spdZ Posted November 2, 2005 Report Share Posted November 2, 2005 I have a 92 z34 with a 5spd, the motor has been rebuilt once but has a tick at 3k with low load situaions in 1st and 2ndgear. I have another motor from a 92 auto, i am going to rebuild that motor to put in, where do the manuals get their extra 10hp or whatever they have. I am going to build it up a little, i want to try to make at least 230whp. Are there any parts i should swap? Thanks Scott Quote Link to comment Share on other sites More sharing options...
z34_nut Posted November 2, 2005 Report Share Posted November 2, 2005 it doesn't take a little to make 230whp. Its takes a good deal to make that much, and some deep pockets edspecially with these engines. Quote Link to comment Share on other sites More sharing options...
Guest TurboSedan Posted November 2, 2005 Report Share Posted November 2, 2005 the manual transmission gains that HP through less drivetrain loss. like Kyle said...you will need to do a few things to reach 230whp. it's not exactly easy without shoving boost into into it, although i'm sure it can be done. Quote Link to comment Share on other sites More sharing options...
birdman Posted November 2, 2005 Report Share Posted November 2, 2005 i almost positive the extra hp came from the slightly higher compression 9.5:1 vs 9.25:1, i belive they made the valve relifs in the pistons smaller to get that. Quote Link to comment Share on other sites More sharing options...
TeeJay3800 Posted November 2, 2005 Report Share Posted November 2, 2005 I concur that manual 3.4's had a 1/4 point more compression than the autos. Quote Link to comment Share on other sites More sharing options...
5speedz34 Posted November 2, 2005 Report Share Posted November 2, 2005 i almost positive the extra hp came from the slightly higher compression 9.5:1 vs 9.25:1, i belive they made the valve relifs in the pistons smaller to get that. Yeah, if you compare auto pistons to manual pistons the reliefs are different. There is info over at 60 about that. FWIW: Manual pistons aren't available anymore through GM. Quote Link to comment Share on other sites More sharing options...
Black5spdZ Posted November 5, 2005 Author Report Share Posted November 5, 2005 well i think i am going to put the money into my z28 and sell this car but thanks for the info scott Quote Link to comment Share on other sites More sharing options...
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