Quick question, I hope.

My car has a 2% M7 crank pulley installed and I'd like to get a SC pulley. I know I cannot get a 17% since M7 only sells a 16% on their site but
Would a 15% pulley with my crank. Equal to a 17! Reduction state?

Also, if I go with the 15, which size belt do I use? I'd like to get one locally

Thanks!

 

Not exactly but close enough for your calculations.

(just trying to keep the peace w/ the mathletes)

 

Well it's probably not exactly 17% but maybe that's why M7 suggests a 16%?

I'm just not so sure on belt sizing for a 2% crank pulley and a 15 or 16% belt

 

You can use KO60535 or the 532.

 

For a 15% pulley?

 

The K060535 seems to work the best IMO.

 

I have a 15% alta pulley and 2% ati and am running a 535 length belt with no issues. Seeing up to 16psi on these hot summer days.

 

Thanks Bram!

 

NP good luck. Keep us posted.

 

I have the 2% + 15% and use a JCW belt.

 

Sort of related question:

When removing the pulley I've seen DIY's where the person put a bolt in the SC snout. They do not say the thread or length of the by. Just "13mm"

Anyone here know the proper bolt?