Originally Posted by zippy

If you're running that much tension on the belt and it's still slipping it might be worth going to a tension with less tension and just spinning it slower. If you have to work the blower that hard that it's slipping the belt with 8 ribs and that much tension on it that just tells you that it's out of it's element. You could go with a 10 rib like the guy just did on performancetrucks.net, but either way your whole idea with the build of reliability is just going out with the truck. It's a good thing you didn't ship it out already. I'm suprised you haven't pulled that thing off there yet.

Originally Posted by Johny GTO

why not a cog drive? I am assuming you have spoken with Brian at Magnuson and such about how to solve the problem. You have no hope in sight?? I find that to be crazy.

Originally Posted by Johny GTO

That sounds like a plan. Build a custom setup so the blower has its own dedicated belt driving it. I am curious about your situation. Has no one else ever run a TVS2300 with the same pulley size you are running, or pushed the amount of air you are attempting to push? I would guess that the vehicle you have decided to maggie-charge is rather unique, but i cant believe that no-one has used a TVS2300 on a motor similar\same to what you are using it on, pushing similar\same boost with a similar\same pulleys. So why is it that you are experiencing such problems?? Why are you getting the amount of belt slippage you are seeing, and having to have the belt so tight it snaps water pumps in half?? Could it be that something is wrong with the blower itself, and that perhaps either the bearings are broken or something doesnt line up properly inside the blower, causing it to be extremely difficult to spin the blower?? This would explain why you are getting belt slippage no matter how tight you have the belt, no matter what you do.

Please keep us informed as too what happens, especially if you either solve the problems or abandon it. You and your shop's reputation proceeds you, and i don't think i am alone in being absolutely shocked that you hit a problem that has you stumped. I have seen some of the work you have done, building custom pieces and parts, modifying the body work and frame of cars to build one off setups, etc. Perhaps that is why something like "belt slip" stumping you has got my and other member's attention, as opposed to the 23000 other threads asking about belt slippage.

Best of luck to you Bob.



I am with you in that i am a bit surprised Bob hasnt said "Oh **** this, grab one of the big pro-chargers. What do you think, F1A or F1R for the hummer?"
Then again, i can understand looking at this as a personal challenge and being dedicated to solving the problem.
I say you try the best you can. First check out the blower, make sure it isnt fucked up. If it is ok, sit down with some of your fabricators and see if you can draw up an individual belt drive for the blower alone. If that wont work (wont fit, for example), try a cog drive. If that fails i say **** it, pull the maggie off and send it back. Then slap a big *** procharger on there and call it a day.

Originally Posted by hellbents10

Yes and your point is????

Originally Posted by supersub

Drove it to vegas, thru denver from MN. hit 590 rwhp @ only 10 psi on a 427 thru a "unlocked converted 4l80 with a 14 bolt rear axle using the same 8-rib front drive,with a 10 rib rear drive. And it was the 3rd TVS2300 shipped! Over 4000 miles in 8-days!

Originally Posted by Exotic Performance Plus

Silverado Curb Weight AT: 4558 lbs

Hummer H2 Curb Weight: 6614 lbs

We're at 585 rwhp on our very conservative Mustang Chassis Dyno and this Hummer has 35" tall tires. Bob

Originally Posted by supersub

This is a Suburban, and its a tad BIGGER it has a smaller 31.5 tall tire though.

bigger cubes less boost. 1 water pump.

It can be done.

Originally Posted by Exotic Performance Plus

I have absolutely no idea at what you're tying to get at. We are trying to make 14 psi with our combination... Bob

Originally Posted by Exotic Performance Plus

I have absolutely no idea at what you're tying to get at. We are trying to make 14 psi with our combination... Bob

Originally Posted by backchannel

I ran a 1900 and a 2300 both to 18800rpm and the boost on a built 427 was 6.1 and 9.0. This was at 3400' which is hard for the blower to make enough cfm to get the boost. I expect there is no way you can make 14 psi unless you have a tiny engine. I had a major failure on both blowers so be careful if you're pushing it.

Originally Posted by supersub

Its a work in progress thats all.

Remember I was the first to install this type of drive system in a GMT-800 vehicle utilizing the 122hh, then the TVS. You are the first with the Hummer.

There are many similarities, and some not. working thru it will obtain the goals. But I would suggest looking at what you have already done. some of those things may or maynot be working for your combo.

I have thrown/ripped/scredded/and slipped so many belts, stuck on the side of the road, wrenching everything over and over. At this point I have hit the above listed #'s and continuing to increase them one step at a time.

My front drive setup required shimming/pulley adj in several different area's to obtain the longevity of its drive belt. Prior to that i could not go 2 mi with out some type of belt issue. Hense the statment "Drove to Vegas" still on the same belt.

once we arrived in vegas we believed to see the rear drive (10-rib)slipping only allowing 10 psi. Netting the #'s above.

Now I am switching over the rear drive to the cog similiar to your's
and will attempt larger boost/hp #'s.

we are not that different in over all combo's

How well is the front alignment on your set-up? where does the belt wrap on the water pump? more towards the front, or back. Is the drive side forward creating a tugging sensation?

Originally Posted by backchannel

I ran a 1900 and a 2300 both to 18800rpm and the boost on a built 427 was 6.1 and 9.0. This was at 3400' which is hard for the blower to make enough cfm to get the boost. I expect there is no way you can make 14 psi unless you have a tiny engine. I had a major failure on both blowers so be careful if you're pushing it.

Originally Posted by Exotic Performance Plus

I guess we got lucky. This LS3 with a 4.0 stroker crankshaft is seeing 14 psi when the belt doesn't slip. Hopefully this blower stays together, we were told it could make the boost. Bob

Originally Posted by backchannel

Boost # is too variable in relation to hp on different engines to be a concern to me. I want to know how much power can be made [ which cfm and iat are big factors
8" balancer and 2.8" pulley = 9 psi with no slip
what made 14 psi on your setup

Originally Posted by Exotic Performance Plus

You are 100% correct.

Here is a link to this truck and the entire build.
http://www.exoticperformanceplus.com...Car.php?car=56 Bob

Originally Posted by hellbents10

It think that is it for it even with no slip and over spinning it, makes sense I think the highest hp ZR1 (w/2300) is at about 700 to the tires. That is with a lot less loss to the tires then the 80e 14 bolt combo though.