I am thinking about getting underdrive pulleys for my car, but i dont know if its worth the money or not. could someone that has them tell me if they make a difference.
thanks.

 

They're in my top 3 list. Pulleys, shift kit, poly trans mount. Of course, all of these come after the Golden Rule (all praise TomP ) the FULL AND COMPLETE tune up.

I love my underdrive pulleys. You'll get very nervous about your voltage though, I know I do. I run at like 8 volts at idle, in drive, at a stoplight, at night, with the stereo thumping and the windshield wipers on, foot on the brake pedal. But it never goes lower then that, so don't sweat it. Hypertech, $75, or maybe 3.1 Firebird will seel you his for $45... (J/k, that's a rib at him if he looks in here).

-Reno

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'88 Firebird LB8
"Cerberus"
-Supercharged Hybrid LB8/L32 Project-
"You think you're weak and maybe I'm the cure, but I've got 6 pistons in my engine, and I got one for ya...it's a long shot"
http://www.angelfire.com/il/Firebird28/index.html

 

 

... I'd never do it cause of my stereo ... my $.02

 

how hard are they to install and what do you have to do to install them? thanks for the help.

 

First off have fun finding a belt second of al. Dont use the alternator pully you wont notice a difference i took mine off it killed my batterys and i had no juce goin through my car. The crank pully is easy 4 botls i belive. use wd40 to losoen them and also wedge a wrench inbetween that and the waterpump pully wiht the belt stoll pn so the crank dosent ove its rather soimple. just expect to wait a while to get those bolts off

 

i bought my 88' 305 TPI from a junked firebird w/ a five speed, one question were these motors w/ serpentine or just plain one belt.

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92' camaro
New 305 block TPI conversion, Flat top pistons,Bore over .30 Forged parts all around,Edelbrock intake,ported plennum,ported corvette alluminum heads, accel cam,52mm throttle bodie, SLP runners Home aid cold air induction, Air foil,ford SVO 19lb injectors,fuel regulator,cloys timing chain, comp alluminum roller rocker arms and pushrods MSD 8.5 mm wires, bosch plattinum plugs, hypertech cap & rotor and coil, Edelbrock TES headers, free flowing catalytic converter and a 3 inch force II flowmaster exhaust system, and a 3 inch cutout,Zoom multi friction clutch, T-5 tranny,billenstien shocks&struts.
Soon to come!!!
Procharger system 12lbs o boost.
New paint job(hawaiin orchid purple)Cast alluminum ZR1 rims w/ 275 tires.
Favorite quote: "where ever u go, there u are"

Other car;
1971 plymouth Duster
Mods:340,edelbrock victor jr. intake, 650 4 barrel holley, heddman headers,40 series dual flowmasters, cold air intake,4:10 gears, just got a new paint job and cragar rims with 315 tires in the back.
:Yeah its not a chevy but damn how many 71' dusters have u seen in the streets.

 

serpentine IS just one belt.

 

oops what i meant is it a one belt or how do u say a bunch of betls??????

 

anyone know.

------------------
92' camaro
New 305 block TPI conversion, Flat top pistons,Bore over .30 Forged parts all around,Edelbrock intake,ported plennum,ported corvette alluminum heads, accel cam,52mm throttle bodie, SLP runners Home aid cold air induction, Air foil,ford SVO 19lb injectors,fuel regulator,cloys timing chain, comp alluminum roller rocker arms and pushrods MSD 8.5 mm wires, bosch plattinum plugs, hypertech cap & rotor and coil, Edelbrock TES headers, free flowing catalytic converter and a 3 inch force II flowmaster exhaust system, and a 3 inch cutout,Zoom multi friction clutch, T-5 tranny,billenstien shocks&struts.
Soon to come!!!
Procharger system 12lbs o boost.
New paint job(hawaiin orchid purple)Cast alluminum ZR1 rims w/ 275 tires.
Favorite quote: "where ever u go, there u are"

Other car;
1971 plymouth Duster
Mods:340,edelbrock victor jr. intake, 650 4 barrel holley, heddman headers,40 series dual flowmasters, cold air intake,4:10 gears, just got a new paint job and cragar rims with 315 tires in the back.
:Yeah its not a chevy but damn how many 71' dusters have u seen in the streets.

 

multi belt? haha I dont know i'm just kidding around. But I just ordered new pulley's from Jet Performance. Cost $85. gonna have a buddy of mine install it for me for $50. Wonder how much quicker my bird will fly.

 

50 to install.....man this is an easy, easy job. Good chance to get acuanted with your car.

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91 RS W/carbed 350, Vortec heads, performer rpm, Comp cams Xtreme energy 224/230 duration and .477/.480 lift. BFG Drag radials. 3.42 posi,Corvette servoed 700r4, 3000 stallconverter. Edelbrock TES, 3inch cat, flowmaster with single 2.5 inch exit.
Best time yet to come
12's?? :crossthumbs:

This is a Pic of my car in race trim www.tbns.net/billyjay/camero.jpg

Yes I know how to spell camaro- so dont ask. I didnt make the link

 

Ture true...but i'm most likely going to f something up in the process. So I'ma get a friend from work to do it. I work at the chevy lot as an auto detailer (AKA wash all the chevy's there)and he's one of the mechanics there.

 

Well, GM went from the V-belts ("multibelt"!) to a serpentine belt on the 2.8's in 1987; I'd assume the same for the v8's.


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!

 

i got myt jet underdrive pulleys today and it only came with crank pulley and alternator
pulley has anyone got these 66.00$ im kind of pissed 2 fricken pulleys whats up is that what there supposed to be?

 

Thats what they all come with the alternator pully and crank pully. I would say dont use the alternator pully save you some trouble down the road and sue the crank the crank makes the difference. I know some come with the Waterpump pully never seen em for a 6tho

 

yeh i know about the charging on alt but im thinking that if i get a HO alternator even if it spins slower the HO alt will charge the batt ill try it out ill probably get a 105amp alt or higher any imput would be good

 

I thoght just like you so i went and spent 300 dollars on a 140 amp alternator. Guess what my volts at idle didnt change at all. Reno explained why but i forgot but it wont make a difference. Even when i had it on my 105 amp alternator it woulnt charge at all

 

An underdrive pulley will definitely free up a good deal of hp but are a few ponies worth worrying when you're out at night chillin with your girl, headlights on, stereo on, maybe ac, in bumper to bumper traffic?????

If you're willing to compromise hot summer night ac, do it its good cheap hp, if not think again cause it really sucks to kill your battery while chillin on a hot summer night.

 

thats ok REno I'll keep these pullies

Transformedbird, why are you paying someone 50 bucks?!? Its so easy to put on, first you loosen the 4 small bolts on the crank pulley, then you looson the large one.

next you take the alt pulley off.

Do this at an auto parts store because you wll need to fit a belt and it will take several tries.

Its very easy, but I can understand if you dont want to do it, Reno couldnt do it, haha

 

$66 ? From JET? I thought those were $85. Whats the p/n?