Yup. Personally saw once let go few weeks back on the dyno.

You can't get the CSS or RJM closed deck's in tight enough to keep the cylinders from moving. They move. I knew that the first of 2020. The SOHO mod allows it to stay alive with the CSS system. RJM is a lost cause.

Boost Help Needed
 

Hey Guys,

When I first had my kit installed I was seeing 11-12 psi of boost on my gauge and now the max I get is 10 psi. Not sure if I have a boost leak or getting belt slip. I did notice belt residue on the hood. Not sure if that is normal or not. I had my first SC service at 2500 miles and they installed a new belt at that time. I have about 4000 miles on the kit since then. Any ideas or suggestions would be greatly appreciated. Thanks

You've got bad belt slip. From the looks of the residue on the hood, it appears to be coming from the serpentine side. Is that correct? Do you have Togunz's extra tensioner pulley?

When I close the hood it appears that it would be coming from the belt in front of the bracket closest to the nose of the car. Not sure if I have Topgunz's extra tensioner pulley. RT Tuning ordered the kit and did my install. Maybe you can tell from the pics?

Correct. The belt in the front is the serpentine side. You do have the extra tensioner pulley also (see the pulley I circled in red). I'm not sure why you're getting so much slip. Have you contacted Aaron (Topgunz) to see what he thinks?

Thank you for your input. I have not reached out to Aaron yet, but I will.

There are 2 length belts that are used with the a2a kit. Your's might be the one that's a little longer. Changing to the shorter one may help. Depends on if your stock tensioner is maxed out. I'm amazed that you're getting slip at such a low psi. In the 4 years I was supercharged, I never had belt slip on the serpentine side and I was running close to 17 psi for a few of those years and 19.5 until I blew my motor. :rofl2:

Yeah that's a TON of belt slip, especially considering you have that better tensioner position than I think most of us have.

I thought the ACE kit came with RPM belts but both of yours appears to be the non-RPM version. Did they downgrade the belts when they changed them or you have always had the non-RPM version?

Edit: I just noticed the tensioner is in a different spot between the two pictures, why is that? What's the difference between the first and second pictures?

Did the ACE kit come with a serpentine RPM belt? I thought it was just the sc belt. Good catch on the tensioner pulley, I didn't notice that.

Yes, I noticed that as well. All ace kits have the idler repositioned to the lower spot and not in place of a bolt for that upper brace.

Also, I only sent the ace kit out with anodized black drive pulleys on the jack shaft. Why is yours silver?

Maybe it didn't, I'm not sure. I suspect it's possible with the ACE kit configuration though. I tried to move the tensioner to that very bottom bolt hole and the RPM belt was about 1" too short. When I talked to Aaron and asked how he did it, the tensioner doesn't use that lower bolt hole but some new hole some where between the two. If I had to take a wild guess that would be right about that 1" difference needed to run the RPM belt. I'm jealous.

I agree with being amazed by how much belt slip I'm getting. I have followed your build for quite some time and gave me the confidence with this kit. I'll be following your next build as well:happydance:

Great catch about the location of the tensioner! The first pic was when I got the car back from the initial install. The second is when I got it back after the first service of the Supercharger and I had some boost loss. They said the belt was slipping and changed out the serpentine belt and must have moved the tensioner. I would assume that they used whatever belts came with the kit but I may be wrong.

I definitely see the difference now with the placement of the idler. I have no idea why the drive pulley on the jack shaft is silver. Is it possible to get the correct pulley and belts thru you?