MTC_75vette

I was told that the SLP Underdrive pulley kit can gain 12-15 hp. My question is that to the wheels or off the motor? I am looking for easy ways to pick up extra power but I want to know if the $200 bucks is worth spending on this upgrade.

zacht

iTrader: (18)

hm, i dont think thats to the wheels. i think ive seen about 7-10 to the wheels on some cars.

Jon@Texas-Speed

iTrader: (18)

UD pulleys typically pick up about 8 hp to the ground. They are a pretty good mod for the money. Let us know if you need one. We have several options that will get you fixed up! Pricing is hard to beat as well!

Jon

camz28arro

iTrader: (12)

8rwhp or 10hp, it is worth about a tenth at the track though. Thread should be in external though.

BlackScreaminMachine

iTrader: (17)

I will mention that with the SLP pulley, it does have a SFI rating and has a LARGE lip that does keeps from throwing belts. I still run a stock tensioner.

*02WS6TURK*

iTrader: (13)

Good luck so far with my Powerbond UD Pulley from Texas Speed.

08 silverado z28

I have a 6.0 iron block make into a 408 that's going in a truck. Texas speed do u have kits for trucks? 2008 silverado. And What would b my benifits from that?

08 silverado z28

What r the downsides to an underdrive pulley kit? What's the good side?

MTC_75vette

Hey Jon thanks for your reply yes I am interested could you send me a link with prices?

mike c.

iTrader: (1)

Funny. The guy at vector motorsports who dynos and tunes my car told me he dyno alot of the pullys out. I guess they did some pully dyno testing one day since it's his shop and dyno. He told me none really showed power on HIS mustang dyno but one did gain 3hp. I have the asp pully and i had the slp pully,I sent the slp back. the asp pully is much lighter and will free up some mass and make the car spin up a lil quicker. I have ran asp pullys on my ls1 and ls2 stroker with no troubles running close to 9's on it. The up side,lighter weight,car spins lil faster and gaines in the 1/4mi about one tenth. Down side.......can't think of one.

Elcolq4

There definetly worth the money but you migh try other places becasue ive seen them go for about 90 bucks, but regarding the mustang dynos, they read 10 to 15 % down on horsepower

08 silverado z28

So after you install the underdrive pulleys is the same belt used?

crazyelf

iTrader: (21)

No they require different belt sizes. check out scoggin dickey. I just picked a kit with belts and a reusable crank bolt for a hair over 200 shipped