Looks like Pulleys have been Made for the m42/44

[Viper3812]

http://www.jhy.com.tw/product_list.a...emNo=I00000312

[hridge06]

Originally Posted by Viper3812

http://www.jhy.com.tw/product_list.a...emNo=I00000312

KO sells a set and BavAuto sells a set for the E36. Are you running underdrive pulleys? Wondering how well they work?

[Viper3812]

Yes they sell them, but not for the m42/44. I don't have them, considering it. There is a member on FloridaGerman who is offering them. I think $200.

[HuGo]

So how much HP can underdrive pulleys produce? Are they same size or smaller than the stock pulleys? Will it raise my boost? if doesnt increase boost and increases HP, im all all there

[HuGo]

Ok so it says its bigger, and going bigger gives more hp?

I didnt see a price.

[Viper3812]

From what I know their $200 and I'm guessing 5-7hp?

[HuGo]

Originally Posted by Viper3812

From what I know their $200 and I'm guessing 5-7hp?

5-7hp worth it for 200? Is 7hp noticeable?

Will it raise the boost?

[Viper3812]

I wouldn't know, but it would help. Don't expect mad power.

[pdxmotorhead]

Underdrive pully's are smaller if on the crank bigger if on the accessories.

A smaller crank pully will spin a DASC faster and give more boost.

Yes you can notice a difference with UD pullies, its not extreme.

Especially useful on our type of motor which turns some of the accessories faster than needed to do their assigned tasks IE alternators don't need to spin 1.5 time the crank speed to charge correctly at 3500 Engine RPM.

Dave

[M3_KILL3R]

http://cgi.ebay.com/ebaymotors/BMW-R...21701192QQrdZ1

well ebay already got their hands on em

[Mad-Machine]

I really want a set of those...

[pnosker]

If you guys want a set, I have a relationship with JHY (I wrote about this in my post about the Taipei AMPA). I can get them for $180 shipped to me or something like that.

[HuGo]

So the underdrive pulley WONT raise my boost? If not, im game.

I cant afford to raise my boost any higher than 10 or else im in the blow your engine danger zone.

[HuGo]

I call GB!

Any takers?

[nuvolarossa]

Originally Posted by pdxmotorhead

A smaller crank pully will spin a DASC faster and give more boost.
Dave

I'm sorry but this isn't true
Only two things for raise the boost with a roots supercharger are:
1) BIGGER crank pulley;
2) SMALLER supercharger pulley...
bye