JKearney30

iTrader: (2)

Has anyone tried BBK's underdrive pulley set?

http://www.summitracing.com/parts/BBK-1592/

theres a link just for a reference.

HoLLo

iTrader: (17)

Interesting. I like BBK products. It doesn't say the exact underdrive %, but it looks like most 25% UD pullies. I'd like to know how well it's harmonic balancer works also. It's definitely a plus that is has that.

JKearney30

iTrader: (2)

Uses stock belts also, maybe someone can give us feedback or i'll just have to be the guinea pig lol

JKearney30

iTrader: (2)

OK the stock belt thing could be a lie, the book I saw it in said it did but instructions seem like it doesn't.

redbird555

iTrader: (14)

I think they are the same pullies that summit advertises on their brand but I'm not 100% sure. I doubt the harmonic balancer is as good as an ati though.. oh and it def is 25% underdrive and therefore needs a shorter belt.

jrzdude

iTrader: (4)

The alternator may be overdriven, and it may not need a shorter belt. But if the alternator doesn't make up for the underdriven HB, then yah, it would need a shorter belt.

01ssreda4

iTrader: (96)

The pulley looks just like a Summit brand that has been having failures recently.

bones_c

iTrader: (3)

appologize but im a newb lol... so what is an underdrive pulley and what does it do for my car? again i appologize but seen alot of talk throughout the threads but i cant find anything to explain to me what it is and what it does... thanks

01ssreda4

iTrader: (96)

It slows the accs on the front of the motor down. They rob power at higher rpm. By slowing them down you free up a few hp and prolong their life because they spin slower.