If you do have 42's you will be fine with your pulley size and setup. GMPP 42's will support more than most think.

 

Good to hear. Thanks!

 

Shall I post my HPT logs of my car doing 127% duty cycle on the OEM 42's and OEM 3.06" stage 2 pulley? And the ones of it doing 143% on the 2.9" pulley?
Saying they will be fine is kind of a blanket statement because of other factors.

 

For his setup he will be fine.

My car has been running them for 7 years without one issue, and has been through many different setups and pulley sizes. I know what they can and can not handle.

I've been around for many years. I do not need to see your logs. I've seen many logs and many different setups. Again, he will be fine.

 

I ran 3.0 on 42s no problem if your idc is that high you have something in the tune off

 

It was the GM tune.
I had a whole thread about it month back, you even posted in it.
Two other tuners looked at the file as well.
Nothing was wrong with the injectors either, in fact, another member here has them now and they are fine.

 

I had no problem with my 42's on the dyno over the weekend.

 

What was the duty cycle on them?

 

Ok so i need help with a concern. I have everything together but its making a strange whining. And no its not the supercharger. It almost sounds like its coming from the motor mount. Any ideas?

 

Belt? Tensioner?

 

I guess its the water pump. Not the thing i wanted to hear when i just replaced all the timing.

 

enjoy changing it in the car its a pain in the ass and get the lyle water pump tool if you don't pull cover

 

So it is possible to do it without pulling the front cover off?