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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

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Old 09-04-2020, 05:32 AM   #1 (permalink)
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Default 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!
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Old 09-04-2020, 07:35 PM   #2 (permalink)
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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.
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Old 09-05-2020, 01:33 AM   #3 (permalink)
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Originally Posted by Mariokart View Post
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!
Are you using a "high traction" pulley on the SC side itself?
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Old 09-05-2020, 09:32 AM   #4 (permalink)
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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.
I can't see any belt dust 🤔. Ill upgrade the belt and tensioner set up anyway though. Can't hurt!
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Old 09-05-2020, 09:33 AM   #5 (permalink)
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Are you using a "high traction" pulley on the SC side itself?
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?
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Old 09-06-2020, 12:48 AM   #6 (permalink)
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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.
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Old 09-06-2020, 05:18 AM   #7 (permalink)
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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
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Old 09-06-2020, 05:27 AM   #8 (permalink)
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Default Belt slippage after upgrading to SI trim and turbo guard filter

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Originally Posted by Mariokart View Post
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

OMG ! Youíve got the SC belt adjustment idler pulley on the wrong side of the SC belt!
Should be like this:

No wonder itís slipping !

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Old 09-06-2020, 07:34 AM   #9 (permalink)
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OMG ! Youíve got the SC belt adjustment idler pulley on the wrong side of the SC belt!
Should be like this:

No wonder itís 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
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Old 09-06-2020, 09:23 AM   #10 (permalink)
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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.
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Old 09-06-2020, 02:38 PM   #11 (permalink)
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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.
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Old 09-06-2020, 04:00 PM   #12 (permalink)
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Originally Posted by redondoaveb View Post
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.
I was speaking with him on IG about picking one up as I'm beginning to piece together my setup.
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Old 09-06-2020, 04:44 PM   #13 (permalink)
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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
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Old 09-07-2020, 09:24 AM   #14 (permalink)
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Tks for the mentioning by Redondoaveb and NorthStyle. : ))

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Old 09-14-2020, 11:45 PM   #15 (permalink)
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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 Gatesģ K081088HD belt currently but doesn't seem to be enough. Any reccomendations? Possibly different tighter belt? I noticed the belt isn't super tight.
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