[RedeyeKartier]

So I just installed a griptech upper pulley and now I have a knocking sound coming from the blower by the snout. Anybody ever had this problem?

 

[ScLeCo]

Did you replace the drive bushings or just reuse the old ones? You may get lucky and just need to replace those. The other scenario is that your snout bearings are going out.

 

[Hpmaniac]

The noise is common, it's the drive bushings. I think the noise is always there to some extent and the factory pulley with the clutch dampens the sound. When we install these solid pulleys any noise coming from the drive pin area is going to be louder by nature. Kong sells a upgraded stronger bushing if you decide to change them. Both my superstock and trx make this noise.

 

[RedeyeKartier]

Did you replace the drive bushings or just reuse the old ones? You may get lucky and just need to replace those. The other scenario is that your snout bearings are going out.

I reused the old ones, the car drives perfect i just don’t like that noise.

 

[mschultz443]

Just a random question. so when you go to a solid pully like this where does all of the force that's built up in the supercharger trying to slow down the engine going?

 

[ScLeCo]

I reused the old ones, the car drives perfect i just don’t like that noise.

Here you go.

Jokerz Performance IHI Supercharger Silencer Bushings

Jokerz Performance IHI Supercharger Silencer Bushings

highhorseperformance.com

 

[Unavowed]

Butt iz it fas tho

 

[GreenMachine15]

Just a random question. so when you go to a solid pully like this where does all of the force that's built up in the supercharger trying to slow down the engine going?

These metco style pulleys have been used on all top mount superchargers for years. A clutched pulley can come apart, so nothing is ideal without chance of wear or failure.
If you have to ask, then leave it stock.

 

[16GoManGoHC]

So I just installed a griptech upper pulley and now I have a knocking sound coming from the blower by the snout. Anybody ever had this problem?

Its your supercharger telling you it’s not happy. A happy IHI SC doesn’t make any knocking, rumbling, or noises like it’s full of marbles unless a bearing is going bad (most likely front snout bearing), the drive pins bushings and maybe pins too are shot, or the blower lobes have been knocked out of time (solid pulleys lead to such quicker then a clutched one, it’s why the expense of one was used). I’ve been through every one of these scenarios. I’m probably the only Hellcat owner that has the capability and knowledge to rebuild these IHI superchargers from empty case to back on the engine and ready for some serious rpm and boost. The limit I have found of a clutched pulley on a 2.4 blower is a +10 lower and 2.85 upper. That will last a bit, a 2.72 I went through 3 of them in a month and went to a Whipple 3.0. (Which by the way knocks and rumbles right out of the box and whipple is getting back over a 100 a week at the moment for warranty work due to rotors clashing, mine is going back soon itself and a reworked 2.4 with a 2.75 Griptec is taking its place for a while. My M6 makes some juice.
Here’s what the rotors in the Whipple look like already at just 24 psi of boost.