LS1 FORMULA

I tried 2 searches and got nothing. With my mods and 1/4 mile time in sig. What do you think my gains would be with an undrive pulley? I figured this is one of my last mods I can do before I have to go spray or a cam. I am trying to get as close as I can do 11s without spray or H/C.

black2000ss

iTrader: (6)

I've heard you usually gain around a tenth with one.

bene

iTrader: (16)

I know someone who has similar mods as yours only with a pulley more ran 11.93. Search for the name JETLAG.

I'm going with this route myself. Hopefully will able to squeeze this Z to 11s.

01ssreda4

iTrader: (96)

i think they are only worth about 7 to 10 hp. dont know exactly what that amounts to in the quarter. how about some weight reduction to go along with it?

massls1guy

iTrader: (9)

It's best to do the pulley when you do the cam since it has to come off anyway.

1'low92

iTrader: (5)

I think the asp pulley claims 2 tenths off the 1/4 mile

Intercooler2

iTrader: (24)

I gained zero both ways. Do a short belt!

LS1 FORMULA

Thanks for the input guys. Already did some weight reduction also. Spare tire and rear seats and belts are out of the car. I am going to take off the AC belt this Friday and see what happens. Then I think I will try the underdrive pulley.

02LS1ram

iTrader: (17)

^^ like he said wait till u do ur cam then get 1. i just ordered a cam+ud pulley on wensday. do it all in 1 shot

Intercooler2

iTrader: (24)

Post up what you get. I was thinking about a short belt with my underdrive

SIDEWAYS SECRETS

im doing mine when i do cam.
expect to see at least 7hp from the pulley.

Engine_HP

iTrader: (1)

ya +1 on what he says.

u dont want to pull out the pulley twice.

or u can get the 2 peace chain cover

01SuperSport

iTrader: (7)

Man just put it in and get it out of the way. I'm sure you'll pick up over a tenth maybe two.