Joshiedoom

iTrader: (4)

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

BAMF

I have a SLP pully that I'll be installing after harvest, along with a few other parts but I to was wondering if anyone has dyno tested UD pullys.

Joshiedoom

iTrader: (4)

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.

LCplmarine98

iTrader: (9)

I would kind of like to know, I was thinking about doing it when i do my H/C swap, jsut wonder if its worth it for the price.

foreverzero

iTrader: (5)

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...

Intercooler2

iTrader: (24)

I didn't see anything at the track but it will help you rev quicker. Still a bolt-on and worth it

JonCR96Z

iTrader: (33)

I gained a solid tenth and .5 MPH at the track.

Damian

iTrader: (89)

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.

bad blue bow tie

Have an ASP. don't know the hp, but rev's quicker & 2 mpg.

SOMbitch

iTrader: (8)

No SOTP gain but every little bit adds up..........

redbadss

iTrader: (4)

is there a place to buy the asp pulley, belts, and crank bolts as a kit?

landonew

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!

redbadss

iTrader: (4)

awesome, thanks. i just thought it would be a good idea to get new crank bolts,

02 35thLE

iTrader: (3)

The crank bolt is torque to yield and has to be replaced unless it's a arp bolt.

redbadss

iTrader: (4)

also is there a how-to thread on installing the underdrive pulley? OP- sorry for hi-jacking, just didn't want to make a new thread about the same thing.

JonCR96Z

iTrader: (33)

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.

davered00ss

iTrader: (4)

I like the SLP pully, I gained 14rwhp/12rwtq when I was cam only w/bolt ons.

jetfastformula

I was wondering is the A/C still as cold and dose it affect power steering any as i am thinking about getting one as well.

bad blue bow tie

^^^ I can't tell much of an affect on them. don't think it well bother you.

bad blue bow tie

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