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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.
*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
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.
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 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
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
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
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