- MRZ Performance - Lightweight and Underdrive Pulley group buy for Ecotec's
11-09-2008, 02:46 AM
#76
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they don't make a under drive for your car, they make a light weight version of the oem pulley which is better than stock... and i wouldn't think you would need a tune, as all it does is release hp the vehicle already has and lets you rev faster, like 3-5 hp i think is what is stated.
also, it isn't 175, if you help us get to 10 it would be cheaper, and if we get 20 even cheaper so u should really pick one up lol.
also, it isn't 175, if you help us get to 10 it would be cheaper, and if we get 20 even cheaper so u should really pick one up lol.
11-09-2008, 03:03 AM
#78
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from what i understand is not a good idea to run a underdrive on a sc car... just what i heard don't know from experience, i'd say it would affect the boost or something with the pulley being smaller *shurgs* dunno..
11-09-2008, 02:41 PM
#86
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I got the neutral color cuz it looks almost stock so the dealer hasnt noticed it but then again my dealer guys is cool so yeah
11-09-2008, 09:15 PM
#92
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Exactly, an underdrive pulley is a smaller pulley therefore it slows down your belt and everyting the belt drives like the supercharger. if your supercharger is turning slower it obviously lowers boost and isn't as effective in turn makeing your car slower. the light weight option lets your supercharger spin the same speed but there is less drag (weight) on the engine so it speeds up even quicker!!!
11-10-2008, 03:11 PM
#96
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they don't make a under drive for your car, they make a light weight version of the oem pulley which is better than stock... and i wouldn't think you would need a tune, as all it does is release hp the vehicle already has and lets you rev faster, like 3-5 hp i think is what is stated.
also, it isn't 175, if you help us get to 10 it would be cheaper, and if we get 20 even cheaper so u should really pick one up lol.
also, it isn't 175, if you help us get to 10 it would be cheaper, and if we get 20 even cheaper so u should really pick one up lol.
We only make Lightweights for the 2.0 since there is no gain in using an uderdrive in a supercharged application...
Thanks for joining!
I PM'd you about the pulley color you want 
Last edited by MRZ - RedGTZ; 11-10-2008 at 03:12 PM. Reason: Automerged Doublepost
11-10-2008, 09:42 PM
#99
<2 hours if you take your time and have the right tools.....I installed the UDP on my 2.4....2.0 same. Jack up right front side of car, take off right front wheel, take off splash gaurd, remove serpentine belt, remove balancer bolt (best done with an impact wrench), remove balancer, install MRZ pulley, install new bolt--torque to MRZ specs (hold pulley with "J" tool or hold flywheel); reinstall: belt, splash gaurd, wheel, and drop car. JN2 also did a how-to on his 2.2 -- same.