12 gt500 boost problem

[Clay crawford]

I have a 2012 pp gt 500 mods are 2.6 pulley w/ 90mm idler, 148 intake, cobra jet throttle body, and x pipe
my problem is at WOT my boost fluctuates back and forth from 15-10 psi thinking it was a slipping belt changed to a gates racing and didn't fix the problem you can defiantly feel the power loss not sure what else it could be if I'm losing traction seems to happen with traction control off and on car only has 20,000 miles

 

[1st usa car]

i assume u have a tune -- you can contact your tuner, datalogging could help find the problem.

 

[1st usa car]

fyi 148 intake is really overkill for those mods.

 

[Clay crawford]

It is tuned and I plan on going to a bigger blower this summer

 

[Clay crawford]

I will send a data log to the tuner see what he says

 

[fmylife]

Possible that the pulley itself is slipping on the snout? How long after installing the pulley did it start happening?

 

[Clay crawford]

I bought the car with the pulley already on car in total has 20,000 miles I'm not sure when it was installed

 

[JB_2010GT500]

I'm guessing with that size pulley you should add an idler pulley to take up some excess belt slack. Several vendors sell them. I bought mine from Billet Pro Shop; it's a nice piece.

 

[Clay crawford]

It has a 90mm idler already

 

[JB_2010GT500]

Oh sorry I missed that up top.


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[Catmonkey]

If you're getting this data off the faux boost gauge in the car, this is based on inferred data from the PCM and has nothing to do with actual boost. You're going to need to install a real gauge to determine what boost you're pushing.