Belt slippage after upgrading to SI trim and turbo guard filter
 

Hey guys, I've recently upgraded to the SI trim and swapped put the filter for a turbo guard screen instead.

Prior to this upgrade I was making 12.5lbs boost with the filter on and Sci trim. Was not getting any belt slip

Now since the upgrade I am only getting 12 at best and it drops off at around 5500rpm (I'd assume it's belt slippage but any other possibilities please let me know

I am running the 9psi pulley and also tbatts updrade for more tension.

Any one gone through something similar and found the fix to fix the slip? If a belts loose would I need to tighten the serp side or supercharger side? Any help or input is greatly appreciated!

Hoping it's something simple as I wasn't having any issues before the upgraded trim and filter removal.

TIA!

You're most likely getting belt slip on the supercharger side. You should see belt dust on the back side of the sc and sc bracket. You can upgrade to the Gates K080220RPM belt and PM "Z"en on the forum, he just developed an additional tensioner set up for the sc side.

Are you using a "high traction" pulley on the SC side itself?

I can't see any belt dust 🤔. Ill upgrade the belt and tensioner set up anyway though. Can't hurt!

I'm not too sure which pulley it is, I purchased the kit second hand and it had the pulleys on already. Is there a way to check which one I have?

Yes the color is different.
High traction is grey and normal one is black.

Ok great. What size high tension pulley would I get?

Also does this look like it done correctly? I have seen some images of the belt going over the top of the middle pulley rather then underneath so just wanted to confirm

Belt slippage after upgrading to SI trim and turbo guard filter
 

OMG ! You’ve got the SC belt adjustment idler pulley on the wrong side of the SC belt!
Should be like this:
https://uploads.tapatalk-cdn.com/202...9e8853022c.jpg
No wonder it’s slipping !

Sent from my iPhone using Tapatalk

Oh man! Would have never even known would just assume the shop had put it on correctly 😔. Thanks bro. At least I know now. Hopefully that gets things back to normal. Thanks so much for your help

I know someone else that tried the belt routing the way you have it. It slipped so bad it hardly made any boost. That's definitely your issue.

Good to know! I was somehow still Making 12lb at around 5200 rpm. Can't wait to get the Mofo on properly and see how the car goes. Once it gets back from getting wrapped I shall get it sorted! Thanks again mate.

I was speaking with him on IG about picking one up as I'm beginning to piece together my setup.

He sent me one, I'll be installing it on my new blower

Tks for the mentioning by Redondoaveb and NorthStyle. : ))

Haven't been visiting here for a while. God knows how busy I've been through these days. Anyone who is interested in our kit

https://www.instagram.com/p/CEQ8EX-H...d=ypvst61v6rra

https://www.instagram.com/p/CDqz0MgH...d=gw1zp2hpmt0n

https://www.instagram.com/p/CDq6Y2sH...=14614kwadienn

https://www.instagram.com/p/CFUjDc5H...=1txep2csmc0j6

https://www.instagram.com/p/CF_O7I6n...d=8tvoujj95k1z

https://www.instagram.com/p/CFcNsPFn...=1ed1l91b7opak

can pm me via IG

@minized123456

It has several advantages. Antislip is just one among them.

- Zen

Ok so I rerouted the supercharger belt correctly and the slip was exactly the same. After some inspection it turns out I'm getting slip on the serpentine belt (visable belt dust) . I have the additional Tbatt pulley and using Gates® K081088HD belt currently but doesn't seem to be enough. Any reccomendations? Possibly different tighter belt? I noticed the belt isn't super tight.

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.

Can you take a picture or tell us exactly what part number belt on the SC side that has stopped your belt slip.
I noticed in your video you (were) using a Gates AT belt which stands for "Advanced Technolgy" with longer life, etc. I'm wondering if the "AT" belts are less grippy than the "rpm" belts. I have never used an "AT" belt on my SC.

I'm using the Gates 8PK562 (K080220) on the SC. It doesn't say ''rpm' anywhere on the belt or packaging, does yours?
I've never used the SC belt in the "AT" packaging although it doesn't have "AT" on the belt itself as yours does in your video. That belt was supplied from "CAPA" here in Autralia when I had them upgrade my SC's bearings and change to Si trim.

I'm using the Gates 8PK2764 (K081088) on the serp side along with
TBatt's extra pulley.

Also is your SC "overspun" and if so what are all your SC pulley sizes and therefore SC RPM's?

Finally does your SC have the bearing upgrade done?

I'm just very interested and wanting to be clear on exactly what you've done/used compared to myself.
(PS) I don't use a Turbo Guard or TopGunz little filter. I use a specially cast adaptor from SC to a pod filter via metal tube to suit.

Cheers!

Here's the RPM belt.
https://www.jegs.com/i/Gates/465/K080220RPM/10002/-1

Can confirm that RPM belt is amazing.

Not to bring up an old thread,

But did you upgrade the supercharger side pulley to the high traction? Where do i get this? Did you upgrade any other pulleys?

Just sent my unit to get the SI upgrade and I'm running the S&G velocity stack screen.