i was thinking a bout getting an underdrive pulley kit for my 99 T/A. do they actually give you that noticable of a difference in power and torque?
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From what I have seen and a few people I have talked to the LS1 seems to be more responsive to the pulley than the LT1.
I would go with the ASP pulley, it is a high quality peice. I had the pulleys on my 93 Formula and they really didn't do a whole lot. The gas mileage was a little better, and the torque picked up a bit, but nothing huge. With the LS1's the gains are supposed to be more noticable.
This will probably be one of my next mods.99 TA "RBLUTA" - NBM, M6, Whisper Lid, SLP Fan Switch, 160* Thermo, SLP LM, BMR STB & LCA's.
***SOLD*** It will be missed!!
93 Formula "FRMLAV8" -383 Stroker -
The LS1 produces a more significant gain than the LT1 because the LS1 has a belt-driven water pump. LT1 water pump is driven off the timing gears.Fred
381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motorComment
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I have the ASP u/d crank pulley - works fine, car seems to rev a little quicker. It's one of those items that's a nice addition to an overall bolt on package
'98 WS6 Formula M6
A few mods...best 1/4 mile results so far 12.64 and 115mphComment
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