Underdrive Pulley: Which one should I choose? - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 06-25-2006, 07:25 PM   #21
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I had to modify my torque axis mount to get mine to fit:


But that'* a Series 1. Same issue, different chunk of metal. I had to take ALOT off the mount.
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Old 06-25-2006, 08:03 PM   #22
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Will,

was it worth it? did you notice any performance differences? H20 temp? Top end increase?
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Old 06-25-2006, 08:13 PM   #23
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No operating temp differences due to this, either positive or negative. Nothing felt performance wise, but it is helping (simply physics, right?) but probably in the 3-5hp range, which is REALLY hard to feel.
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Old 06-25-2006, 08:26 PM   #24
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That'* gotta be worth about .005 in the quarter!

i may have to do this mod!
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Old 06-25-2006, 08:43 PM   #25
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I just ordered mine about 1 hour ago, i am going to give it a try.
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Old 06-26-2006, 01:47 AM   #26
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It worked for me... not sure it was worth the problems it caused but I ended up with a setup that is better then ever.
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Old 06-26-2006, 03:10 AM   #27
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Blazin, by "it worked for me", what are you saying? You know it helped performance wise? Or you did it and it didn't eat belts up?

From my experience, the effect cannot be felt or measured. It can be predicted from a logical sense, but I seriously doubt you could attribute any gains seen at the track or on a dyno to such a small modification.
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Old 06-26-2006, 08:26 PM   #28
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I ment I have not seen any ill side effects from running one. I'm not stating gains though it does seem to rev a lil faster but nothing you are going to see in a 'butt dyno'.
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Old 06-26-2006, 09:16 PM   #29
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Good info here guys..

Blazin.. you mention it maybe being worth the problems. What did you encounter ?
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Old 06-26-2006, 09:31 PM   #30
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I didn't have to modify my engine mount ('92) from the looks of it willwren had to on his '93. So the only problem I ran into is belt slip running a 2" pulley with a stock sized tentioner pulley. I didn't have a problem running a 2.2" pulley. The problem is solved now and it looks like willwren will be working to solve the problem also. I really wouldn't call this a problem since I really dont see many people in the near future running a 2" pulley.
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