One of my friends told me that underdrive pullies give you a noticable power gain and told me to do it. I figured I'd ask if it was worth it here because he is full of it. This is the same friend that told me about how sideways fartcans reduce drag. lol
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Don't aftermarket pullies usually cause major alternator problems?Red 95 Trans Am: M6, Moroso CAI, Magnaflow, Spohn sway bars, back to life as of 2/15/10!!!
SOLD- Kinda miss it
94 Del Sol VTEC: 27 city/ 33 highway, knee deep in slowness
SOLD- Good riddance!
2006 Ford Fusion: 2.3, 5 speed, could run 15lbs of boost with a 150 shot and it'd still be slow -
Sometimes.Originally posted by Nightrage
Noticeable power gains would be surprising to me. They just are not worth that much hp on an LT1.Rob B 95Z A4 Tech Page (Part numbers / locations, how to's, schematics, DTC's...) Home Page - shbox.comComment
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And, to back that up, a dyno test showing an 0.7 peak HP gain with an U/D pulley on a 96 WS6. This site is a good reference for the bolt-on mods. You ought to look it over.
http://www.ws6.com/mod-2.htmFred
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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And to add to what Fred said, slowing the belt speed adds life to the accessories. I just replaced my original alternator (137k miles), not because it failed...... just on a hunch that it might. The voltage had been showing a little low so I replaced it with a new one and the volts are stronger than when I bought the car and it was stock. The other accessories are still OEM. Underdrive pulleys also solved my belt squeek that occured on a WOT shift.
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