Sponsor Sales & Specials - Introducing New SFI-Approved Underdrive Crank Pulleys!

We are proud to introduce a new underdrive balancer pulley for the LS1 f-body. We offer them in a 10% and 25% underdriven pulley, and it features deep grooves to keep the belts from slipping off. You can see some pictures below.

http://www.texas-speed.com/images/tsppulley.gif.

For an introductory special, we will be offering them for $199 + shipping, and the new crank bolt will be included! :) This offer will be good for the first 20 25% underdrive pulleys and 10 10% underdrive pulleys. Give us a call if you have any questions or would like to get one on order.

Thanks!

Jason :) :cheers:
Texas Speed & Performance

How do they compare weight-wise to the ASP and stocker? Thanks.

What % underdrive is an ASP pulley, what kind of gains would you likely see in going from an ASP to a 25% UD pulley? Thanks, Shawn

Can we see a dyno before and after with these?

What is the 2nd pulley in the picture for. Is that a larger idler pulley to make up the belt lenth difference, or for another accessory? Do the pulley sets come with the belt, and if not, what's the price with the a/c and serpinitne belt?

Hello?

my guess is the bigger one is the 10% and the smaller one is the 25%.

thats pretty small!

25% is the same as ASP's pulley. If its the pic I'm thinking of, then its the same pulley just shrunk to fit the price in under it (I made fun of Jason for that too). It comes with a crank bolt, and from what I overheard today the belts would run $35.

I havn't opened a 10% box yet, but I'd say it'll gain about 4-5 rwhp on 10% and the same as an ASP for the 25%. I'll prob install one myself late tomorrow night or Friday on a local car.

Joseph is right thats the same pulley just sized down :)

Jason

It looks like my Pioneer pulley. Hmm.......?

It looks like my Pioneer pulley. Hmm.......?

IF this is a Pioneer, you should advertise that it doesn't require maching to clear double roller chains like the ASP pullies. ;)

How much do these pulleys systems help in rwhp? My car is running 13.031 and 108MPH with standard A4 converter - I want some extra hp to go sub13.00

Typically 8-10 at the wheels. Pretty good mod for the money.

IF this is a Pioneer, you should advertise that it doesn't require maching to clear double roller chains like the ASP pullies. ;)

I emailed them this weekend and asked if this pulley would clear double roller chains without machining but I havent received a response yet. Maybe we can get an answer here instead.

Mine cleared. I believe it is a Pioneer pulley. Just call and double check to be sure.