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Old Jul 31, 2005 | 11:20 AM
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i just purchased the underdrive pulleys for my 94 lt1 has anyone put these on there car? if so what was the results were they worth the effort?
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Old Jul 31, 2005 | 11:30 AM
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Old Jul 31, 2005 | 12:24 PM
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Originally Posted by myvettesblue
i just purchased the underdrive pulleys for my 94 lt1 has anyone put these on there car? if so what was the results were they worth the effort?
Did the company you bought them from quote a certain hp gain? I'm just curious to see how much the add. How much did you buy them for?
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Old Jul 31, 2005 | 12:34 PM
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Originally Posted by carriker
Did the company you bought them from quote a certain hp gain? I'm just curious to see how much the add. How much did you buy them for?
JET Underdrive Pulley Set




The JET Underdrive Pulley Set reclaims lost horsepower and mileage by reducing the drag placed on the engine to drive the accessories such as the air conditioning, power steering and water pump. The JET Pulleys slow down these accessories to allow the engine to turn with less effort without any adverse effect on the operation of A/C, power steering, charging or cooling systems. Installation consists of simple bolt-on replacement of the stock pulleys. Kits include pulleys, hardware, complete instructions and part number for new serpentine belt (most kits will require use of smaller size belt).

*Available for some 1984-Current GM, Ford, Dodge and Jeep vehicles.

-Gain 10-30 horsepower
-Increased fuel economy
-Improved acceleration
-Billet steel construction

*Belt is not included with kit.
*Number and type of pulleys will vary per application

i bought mine off ebay for 68.00 with shipping and they were still new in the box. they sell on the jet website for 320.00 so i guess i got a good deal on them. but the only thing i seen on the website is for the lt4 now i am not sure if they will even work on mine for i have the lt1
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Old Jul 31, 2005 | 04:48 PM
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I'm pretty sure if it will work with the LT4, then it will work with the LT1.
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Old Jul 31, 2005 | 04:53 PM
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10-30 seems a little high. i would suspect 5-10 with about 15 highest. i am curious to see what other folks have to say that have them installed on their late model C4s. i wonder if they are different on the LT4s and the LT1s.
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Old Aug 1, 2005 | 12:08 AM
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I installed the crank pulley and alt pulley. IMHO, you need to put the alt pulley on as well in order to make sure you are charging the battery at idle. I really didn't notice seat-of-the-pants, but I definitely noticed that the car revved faster, and responded better to throttle inputs. I would say it is a worthy mod.
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Old Aug 1, 2005 | 07:23 PM
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Originally Posted by Irishpilot03
I installed the crank pulley and alt pulley. IMHO, you need to put the alt pulley on as well in order to make sure you are charging the battery at idle. I really didn't notice seat-of-the-pants, but I definitely noticed that the car revved faster, and responded better to throttle inputs. I would say it is a worthy mod.
i got both of them with mine, the crank pulley and the alternator pulley guess i will install them this weekend and let you all know how they worked out
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Old Aug 1, 2005 | 07:33 PM
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Originally Posted by myvettesblue
i got both of them with mine, the crank pulley and the alternator pulley guess i will install them this weekend and let you all know how they worked out
Be ready to make a few trips to the parts store.I think I tried 5 belts before I got the right one...I'd give you the number but it's an L98 so it wouldn't be of any help
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Old Aug 1, 2005 | 08:35 PM
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Originally Posted by lt4dogman
'94 LT1 here...might do it for mine if enough people say it's worth it.
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Old Aug 2, 2005 | 01:34 AM
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Originally Posted by Daffy427
Be ready to make a few trips to the parts store.I think I tried 5 belts before I got the right one...I'd give you the number but it's an L98 so it wouldn't be of any help
it came with the replacementpart number in the instructions thank god i got an email from jet today they said they will work on the lt1 from 92-96 but not the camaro so i am good to go
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Old Aug 2, 2005 | 01:49 AM
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yeah, the replacement belt that was in the instructions was not the right one for me. I too, used like 5 belts before finding the right size.
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Old Aug 2, 2005 | 06:30 AM
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Originally Posted by Irishpilot03
yeah, the replacement belt that was in the instructions was not the right one for me. I too, used like 5 belts before finding the right size.
i will find out this weekend and let you all know
which ones did you buy for yours was it the jet?
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Old Aug 2, 2005 | 08:50 AM
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Man im really getting excited to hear peoples responses now. ive been wanting these for my car for a while. im curious to see how more ppl like them
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Old Aug 2, 2005 | 06:40 PM
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Originally Posted by 1996man
Man im really getting excited to hear peoples responses now. ive been wanting these for my car for a while. im curious to see how more ppl like them
i will update you after i get them installed to let you know if there is any noticeable gains. i will also be doing a dyno test in a couple months and will fill everyone in on the dyno with the mods i have
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Old Aug 2, 2005 | 06:50 PM
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All the small mods add up after awhile.
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Old Aug 2, 2005 | 06:53 PM
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Originally Posted by cuisinartvette
All the small mods add up after awhile.
and i have quite a few right now
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Old Aug 2, 2005 | 09:46 PM
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Originally Posted by myvettesblue
and i have quite a few right now
Larry, you need to bring that beast to an autocross some time.You'll love it.
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Old Aug 3, 2005 | 06:32 AM
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Originally Posted by Daffy427
Larry, you need to bring that beast to an autocross some time.You'll love it.
let me know when the next one is and i'll see if i can make it
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Old Aug 3, 2005 | 09:20 AM
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Originally Posted by Daffy427
Larry, you need to bring that beast to an autocross some time.You'll love it.

Now that sounds like it might be interesting.
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