Underdrive pulley gains?
Thread Starter
12 Second Club
iTrader: (4)
Joined: Dec 2007
Posts: 1,712
Likes: 0
From: Between Bowling Green/Owensboro
Underdrive pulley gains? For you guys with bolt ons only, no heads/cam/n20/etc, what gains did you see from an underdrive pulley?
Car is a DD and thought it might free up a bit of HP and MPG.
Even though the price for any of them is outrageous
Car is a DD and thought it might free up a bit of HP and MPG.
Even though the price for any of them is outrageous
Thread Starter
12 Second Club
iTrader: (4)
Joined: Dec 2007
Posts: 1,712
Likes: 0
From: Between Bowling Green/Owensboro
Most that I have read on here say 3 to 5 rwhp but ive also heard the main benefit is getting into the powerband faster, and 2-3mpg average boost.
ok, i was skeptical also. I raced my buddies 6.0 gto. I had the mods in my sig, he had lts, powerbond udp, corsa's, and a good tune. we were dead even. we put the pulley on in his garage and raced again, this time me pulling a car on him from 55-80mph. i found one for $100 bucks so in my opinion it was worth it, just keep your eyes peeled for good deals on the for sale section. oh and when i punch it, the car def. revs to the powerband faster... 
Trending Topics
Pulleys aren't a peak HP mod, and you won't be happy with it if you're judging by dyno numbers. It reduces accessory drag on the motor, basically "freeing up" a little more power. It's not a huge difference, but it does make a difference. I usually see a consistent 1mph gain at the track with them, which is roughly 1 car length faster than the car was before.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
TECH Fanatic
Joined: Nov 2004
Posts: 1,251
Likes: 0
From: Tuscaloosa, AL.
http://www.texas-speed.com/shop/cate...MID=1&catid=16
TSP is just an example (and my Fav. vendor for standard stuff like UDPs, headers ext.)... any number of sponsers carry them.
Just buy the belt and pully seperate... Why Can't you just re-use the stock crank-bolts?
BTW, it is a solid modification. It is so cheap it is basically a no-brainer!
TSP is just an example (and my Fav. vendor for standard stuff like UDPs, headers ext.)... any number of sponsers carry them.
Just buy the belt and pully seperate... Why Can't you just re-use the stock crank-bolts?
BTW, it is a solid modification. It is so cheap it is basically a no-brainer!
http://www.texas-speed.com/shop/cate...MID=1&catid=16
TSP is just an example (and my Fav. vendor for standard stuff like UDPs, headers ext.)... any number of sponsers carry them.
Just buy the belt and pully seperate... Why Can't you just re-use the stock crank-bolts?
BTW, it is a solid modification. It is so cheap it is basically a no-brainer!
TSP is just an example (and my Fav. vendor for standard stuff like UDPs, headers ext.)... any number of sponsers carry them.
Just buy the belt and pully seperate... Why Can't you just re-use the stock crank-bolts?
BTW, it is a solid modification. It is so cheap it is basically a no-brainer!
Unbolt the stock one, use a puller to get it off, slide the new one back on and bolt it down. It's much easier said than done though.
Teching In
Joined: Jul 2002
Posts: 44
Likes: 0
From: NC
PS I got the overdrive for the alternator... I have not had problem but the needle goes up and down. someone correct me if i'm wrong... i think the CS type alternators can "shut down" to protect the battery