How the hell did you get 12lbs of boost at 5400 RPM? Is your boost gauge accurate!

Upgraded to the SI trim for the blower and swapped the air filter to a turbo guard.

If your belt is slipping with the Tbatt upgrade and you have confirmed its serp side then either your belt is trashed or your auto tensioner has given out.

Thank you mate, I'm going to replace both to be on the safe side. 👍

Ok guys so an update on where I am at. Any further help will Be appreciated here.

So far I have swapped from the Tbatt additional pulley for tension to the tongunz pulley. Have also swapped to a new belt to suit the top gunz pulley (belt is gates K071045). I also swapped the auto tensioner with a new one.

I'm still having slip issues. From my logs it peaks around 12.3psi at 6k rpm then starts dropping down to around 9psi by 7800rpm

While the belt was off I noticed one of the idler pulleys was quite resistent and not spinning smoothly and I'll be changing that next. Would that be it? If not.. Where do I go from here. Its getting frustrating now ��

Mike,
You might try the K071040 belt. It's a little shorter than the K071045. I believe that's the one Topgunz sold with his kits. He may be able to verify that.

Also, take a flashlight and look closely at the supercharger side for bekt dust. You would see it on the stillen bracket, usually behing the jackshaft pulley and on the rear case of the supercharger. When my boost dropped off that quickly, I had belt slio on the sc side.

Oh yeah, by the way, it doesn't surprise me that your boost is dropping off at 7800rpm. My car made max boost at 7k rpm and then leveled out until 7500rpm and dropped off after that. At 7800rpm, the tuner stopped the pull. It made max hp at 7400rpm but boost had leveled off at 7k.

If TopGunz can confirm that's the belt ill order it and give it a go.

Here's a video looking for any visable belt dust. I can't see any but I also have nfi what to look for exactly 😅https://youtu.be/Qr_2sCwF2Cc

Are you using 1 or more high traction pulleys as I mentioned to you before?

K071040 can fit both stock serpentine side jack pulley and the 9lb pulley.

It's on the list of things I'm ticking off one at a time. But didn't get up to that yet. It's around the corner though haha. Putting a nee idler pulley serp side (one is bunk) and changing to an rpm belt Sc side are the next 2 things in the works... Now just waiting for items to come in the post

Awesome thanks for clarifying!

Update -

Ended up being the belt on the supercharger side. Upgraded to gates rpm belt and voila 16.8psi��

You're welcome :tiphat::rofl2:

A huge thank you goes out redondoaveb who has been so extremely helpful along the whole way. A wealth of knowledge and selfless in his time and lengthy detailed replies trying to get this issue sorted for me. Thank you mate!

You're welcome Mike. Happy to help. Glad it was as easy as a belt change.