Torque gains from 3.4" pulley - 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 11-25-2004, 05:29 PM   #21
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Quote:
Originally Posted by willwren
92-93 Stock is 2.55" Can go as low as 2.2" safely.
94-95 Stock is 2.85" Can go as low as 2.5" (running 92-93 stock pulley is cheaper).
How much would I gain if I were to go with a 2.4" or a 2.5" pulley? What is the most commonly ran pulley size? Do I have to do anything with the computer to adapt to the pulley?
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Old 11-25-2004, 05:32 PM   #22
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You wouldn't feel a 2.5". A 2.4 would be ok, probably worth 10hp and maybe 15 tq. 2.3" would be probalby 15/20. The only thing required for a pulley swap is a custom intake to support the increased flow. Exhaust and a 180 stat are desired. No PCM changes necessary.
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Old 11-25-2004, 05:34 PM   #23
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I've got a CAI, a 180* T-stat. I am hopefully going to get an exhaust and a pulley in the spring. I'm looking forward to this.
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Old 11-26-2004, 01:15 PM   #24
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Quote:
Originally Posted by dbtk2
Your tires will wish you would've waited though.
You are definitly right about that. I gotta have some self control....
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Old 11-27-2004, 12:05 AM   #25
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Quote:
Originally Posted by Sol
Quote:
Originally Posted by dbtk2
Your tires will wish you would've waited though.
You are definitly right about that. I gotta have some self control....
Thats what I said after tire set number 1. Then again after tire set number 2. Now I'm on tire set number 3, they are still lasting, because with this third set I've gone through tranny number one and tranny number two, and because I spent more money on them then I should've so every time I think about burning them off I remember what I paid for them. Its stitting waiting for tranny number 3 right now. The self control needs to be a little more controlled in my case. I've put way too much money into that car, and now I'm just looking for an L67 powered car to buy, but I need to pay off the $1600 or so left that I owe on both the trannies, and the exhaust for my winter beater, and a few parts for my engine when I tore it apart before I'll be able to buy one. Hopefully when I get my tax return and sell my winter beater in the spring I'll have a little bit saved by then and I can buy something with an L67, or a 3.8L 5 speed Camaro for a little project I've been wanting to do called project "beat an LS1 with my V6." Then maybe I'll builld up enough smarts to get rid of the STE, I just have so much into it that I would be losing HORRIBLY if I sold it. I might keep if for a winter beater once I get something a little nicer and newer.

I don't have a pulley cause I don't even have an L67 but my car would rape the average pullied L67 at any speed. Once they get into a few more mods thats not the case, but with a decent launch and some tuning mine can easily trap 100-102mph. With a 4T60 transmission, thats not a good thing. After tranny number 3 (hopefully that doesn't happen while I own it) I'm gonna put a 5 speed in it, this particular auto sucks for reliability with any decent amount of power.

Good luck with your tires and pulley. You're hooked now, theres no stopping you. Its way too much fun to mod these cars. I just put a pulley on a '04 Monte Carlo SS today, the owner was slightly impressed to say the least, now they want more.

Shawn
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Old 11-27-2004, 12:23 AM   #26
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Yea, I'm definitly hooked. I want to get a PCM next.
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Old 11-29-2004, 02:00 AM   #27
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My cousin has a 2000 GTP and dynoed 242hp/ 274ft-lbs of torque to the wheels with a Homeade CAI, 3.4 pulley, and U-bend removed (stock exhaust).
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Old 11-29-2004, 01:53 PM   #28
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Quote:
Originally Posted by STAGED
Quote:
Originally Posted by kevo
Quote:
Originally Posted by Sol
Sweet. I can't wait till I get it installed.
Yeah, even though mine is a hair bigger(3.5), I noticed a big difference with the smaller pulley. It really woke my bonne up!
Did you notice any KR in extreme weather conditions? Any baseline and improvement measurements using the 3.5" upper pulley.

Thanks
I didn't notice any KR. In fact, I got the 3.5 instead of the 3.4 for on the very assumption that I would not be doing too many mods. 3.4 with no mods is probably going to generate noticable KR, but not really on the 3.5.

In fact I remember having this discussion in another thread some months ago with Shawn(dbtk2) who was real informative about which pulley to go with. ----thanks Shawn---
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Old 11-29-2004, 05:40 PM   #29
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Always glad to help, and I'm glad you're satisfied with your decision. That car should run very well with that setup, and the nice thing about it is you don't have to worry about doing mods to get rid of KR.

Shawn
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