Originally Posted by FarmTruc

I didn't have time to read the entire thread, but might be a good idea to start with this first.

https://www.google.com/#hl=en&sugexp...w=1680&bih=855

Originally Posted by slowfive0

Another solution and probably the easier one (although not cheaper) would be a brace similar to these:

Our new KMS crank to supercharger support brace... - Yellow Bullet Forums

Originally Posted by slowfive0

Judging from your times, I would venture to say that you're running more then 5 psi of boost ;-) That said, I can almost guarantee that your brackets are flexing. Any pulley alignment issues will further compound your problem.

You need to check your alignment (preferably with a laser alignment tool) and then brace up your bracket better. I had a Novi 2000 that I was having similar issues and I ended up having a buddy machine up a new bracket out of much thicker then stock billet aluminum. That combined with a brace fixed my issue (throwing cog belts).

It can be a real PIA, but well worth it when you get it right. Hang in there.

Also, when you're looking to brace your blower, picture a straight line that goes through the center of the crank and the center of your blower. Under boost, the blower head is going to try to pull or bend towards the crank (direction of radiator) along that imaginary line. So you will need to try and brace the head unit so that it can't pull in that direction. Sometimes that is easy, sometimes not so much. On my last project (mustang) we braced the blower head to the strut tower but I was using solid motor mounts. If you have regular mounts, you would need to brace to the engine as the engine is going to move around in the engine bay a little under power, etc. Hope that description made sense---lol.

One other thing, if you're having these problems and have run those times, you are probably getting belt slip here and there as the head unit flexes and potentially unloads the belt. The automatic tensioner is obviously going to try and compensate for that movement. How well it does is questionable. If you are losing boost through belt slippage you'll see it on your logs and will have a lot of black dust around your blower. Bottom line, more performance maybe lurking with just this simple fix ;-) Good luck!

Originally Posted by Blown06

Yea, thats the post I was talking about. Good find.

With that mod and the Gates laser alignment tool I was able to keep an 8-rib belt stuck at 23 psi on a d1sc with stock truck brackets.

Originally Posted by Revolutionary

I will save you a ton of time.. because I went though what your going though 5 years ago when I had the 370 with the D1sc the whole setup that was in my truck is in another guys ss' truck down south now. It's running around 20 psi with a reichard racing 8 rib it's got an innovators west 8 rib conversion I added braces to both the tensioner and the blower bracket itself to keep it stable. YES the bracket flexes the harder you rank on the blower asking for more boost the more flex it gets. I have seen it first hand Shredded even the green gates industrial belts. The 8 rib conversion helped and at 16 psi it's very stable it won't kill the belts nearly as bad as it does when it's twisted up but it still is hard on them.

The solution is to put the blower in a different spot. There are a couple guys doing different things I have a plan in mind exactly how to do it not only keep the head unit stead but be able to twist on it very hard. I just don't have a vehicle or customer willing to pull the trigger on the idea now because it's not cheap.

The tensioner is not your main issue it's the alignment of the drive under load. The blower is heavy and hangs off the side of the accessory brackets making it easier to twist.