anyone who has the ZPI pulley experienced any belt slipping? Im getting real low boost for high RPM... like 4psi. I just cant think of anything else that it could be. I reinstalled the stock one and it worked fine. then put the pulley back on and same as before.. 4-5 psi max. any info would be great.

 

i have full boost at like 3800 rpms (9ish lbs) No problems... might be the way you shimmed your pulley

 

hows your belt tension?

 

sorry for all the posts but also could be a defective spring in the BPV... and that would be able to make it able to hold stock boost and not the upgraded boost level. Hope all this helps

 

this can be fixed by replacing with a bosch 110 bpv

 

you should of got a warranty with it so check with the place you got it from and see what they will do for ya... If not call up Bosch.

 

i guess i could try the stock BPV to see if my 110 is defective.. but i doubt it...

there were no shims on my pulley.. and since i swapped my stock pulley back and it worked tells me that its not the install. im gonna check tomarrow for any belt wearing due to slipping.

 

you have to reshim the 9 lb pulley. i think i used a .5" shim for that one opposed to none on my stock TRD pulley That could be very well that. But you got shims with your kit. I would check this first before you put yourself through a hell of a lot of trouble

The 9 lb pulley is smaller which means you need to shim it to get proper belt tension so it could be very well that your belt is slipping because of it being to loose. I am 90% sure it will be this since you do not have any shims. Talk to the dealership or whoever did the install to get the shims.

 

oh yah btw i think you are suppost to have less than 1/8" of play in the Serpentine Belt.

 

He already has a 110

 

sorry, didnt know

 

i guess im a little confused about the shims. I thought the purpose was to center the pulley so the belt ran straight. could you explain a little. thanks for the help.

 

Thaty's what the shims are for. they have nothing to do with belt tension. If you put the stock pulley back on and the belt didn't squeal, then you have other issues. You could try to get a smaller belt and that would give you the proper tension needed for the smaller pulley.

 

Woah! you get 9lbs of boost at 3800 rpms??? I get 9lbs at like 6200rpms.. HMMMMMM...

 

You may have already tried this, but see if you can get your belt tensioners tighter on the belt to get your belt on there as tight as possible. With supercharged motors belts have to be on almost insanely tight for everything to work with maximum efficiency. Keep us updated.

 

I had the same belt squeak with the ZPI pulley. I also dont have the SC but Talk to Kenny, and he should take care of you.

He is good with cust service

 

my problem is trying to keep traction between 3500 and 5000rpm in 2nd. Major wheel spin hehe.

 

Is that because of the snow motozen? Seriously.. anyone else with the ZPI pulley and a boost gauge .. when are you seeing 9lbs?

 

sorry i meant 5800

 

i havnt tried tightening the tension bolt.. but i will. if that doesnt work does anyone know the length of the stock belt so i can try to get a shorter one? thanks for all the help guys.