Well its my first week with the car and ive discovered i have an aftermarket lower pulley. The upper pulley is stock to my knowledge but the lower pulley isnt for sure. Its pretty big. Ill try to get a good picture of it tomorrow but its silver, and i was wondering what kind of boost would a lower pulley put you up to?
Lower pulley question
- Thread starter lunatikgixxer
- Start date
Lower = torque! 
....Go with a 4# (if you do it)
....Go with a 4# (if you do it)
Let's hope you have a 4 lb. lower as that is the most popular choice. If you intend to keep your Eaton blower, you can then port it and add a 2.76 or 2.93 upper for some serious boost/fun.
Alright cool . Thanks 95SC thats exactly what i wanted to know. How to figure it out. I will go measure it and take a few pics
Well i measured it (on the car) and it measured at 9-1/4 inches. So im guessing its a 6lbs pulley judging from 95SC's measurements for the smaller pulleys. Am i right, or will someone correct me... If so how much boost am i running on that. I took a pic of the upper pulley also. I believe its stock. Stock upper is 3 inch correct?
Stock upper is 3.4-3.5" if I remember correctly. That however does look like a stock upper pulley. I agree with everyone else in saying get that thing ported and throw a 2.93 upper on it now. You actually got lucky as the lower is the much more difficult and larger investment of the 2.
Yeah i know the lowers are much more expensive. But what lower pulley is it? A 6? Bigger?
^ x2. the lower pulley kits are 400~ give or take, and an upper pulley is around 130 for a good one, so you lucked out my friend. with a 6lb pulley/stock upper i'd imagine you're around 13-14psi. which is about as much as you want on a stock eaton. get it ported and throw a 2.93 or 3.0 on it, and then you'll be makin some power!
that should be a 6 from the measurement. something you might want to check is the size on the alternator. with the bigger lowers you need to run a bigger alt pulley to slow it down or it'll get overspun. you'd want a 3.4/3.5 for the 6lb i do believe.
Ok it measured in at about 2-3/4 (it was hard to see) But its definitely under 3 inches.... What do you guys think its running horsepower wise with that pulley, Long tubes, orx, catback, and an intake?
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Stock upper is 3.65 I believe. Definately need a bigger alt pulley a 3.2 or even larger w/ a #6 lower...
where did you buy the car from? Do you know if it was de-modded? That happens alot with these cars
If you know the previous owner, I'd ask them about it....if you don't get the car dyno tuned to make sure it's running correctly.
If you know the previous owner, I'd ask them about it....if you don't get the car dyno tuned to make sure it's running correctly.
assuming it's got a decent tune i'd say in the 450whp area. and also like stated I would deffinitely buy a bigger alternator pully, check on lethal they're only around 50 bucks and will hopefully save your alternator from puking an early death.
yep i was looking on there earlier im definitely ordering one asap. Thanks for info guys!
Your upper pulley has a bolt and washer sticking out.
My "supposedly" never-pullied car has a little rubber grommet that is flush with the pulley face.
You may not be able to see the pic, its small and might not upload correctly.
I can get a better one and send it to your email or something.
Good luck.
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