Could this be the Double Sided Rib that we PD users need?

[black34v6]

you dont necessarily need another tensioner. try just an "idler" puller (something like what the A/C delete pulley looks like) -- that way you can make the belt wrap around more without having ot have two machines working on belt tension at once..

just my .02.

-R

[Speed]

Idler pulley or tentioner; what ever works. The point being to wrap the belt around the pully farther give it more traction surface. And don't forget the VHT. At the least, that will give you a temp solution to belt slippage. A friend of mine with an 03 Cobra does it and it works well for him.

[Mighty Thor]

<blockquote>quote:</font><hr>Originally posted by Speed:
Idler pulley or tentioner; what ever works. The point being to wrap the belt around the pully farther give it more traction surface. And don't forget the VHT. At the least, that will give you a temp solution to belt slippage. A friend of mine with an 03 Cobra does it and it works well for him.<hr></blockquote>

Speed, I don't know if you know it or not but Powerdyne set up runs on the flat side of the belt and that's were the problem is. I thought about adding another pulley close to the blower and make it wrap more but I never got around to it. Maybe I'll keep that in consideration.

Belt slippage is a common thing among SC. I know a Stang that is trying to run 12psi but is only seeing 9-8psi. He said he's going for an 8 rib pulley.

[Perry V]

Did you happen to get a measurement of the corvette belt? How much shorter was it? Cause i was looking at our belt diagram to see different ways to route the belt, and i think i've found a a way to to take away a good chunk of belt...

we can go straight from the alt to the WP (still running on the back side) then to the PS, and from there directly to the Crank. Sure there won't be much coverage for the WP, but if we got that pulley ribbed it would probably still grab pretty good.... i think that shortcut can probably shave off a good foot or two off our belts.... plus all the accessories still run in the same direction..

[Mighty Thor]

Perry, it doesn't say how long it is. The belt is shorter than our stock belt. All I can say if it was even a tad bit shorter, it would definately work.

Do you have a diagram or schematic of how you would do it? Are you planning on skipping the A/C and power steering?

[Speed]

Yes, belt slippage is a PITA. On the supercharged cars I've worked with, everytime we tried to up things a little bit, the belt would seem to slip. On the 03 Cobras, the add another pulley to effectively wrap the entire pully except for a very small portion with belt. Even if you are running the flat side, more surface area is more traction. Also, seriously, try some VHT. On the 03, it made quite a difference and can be spread onto the belt while the car is running. Then go make your pass. It's messy but it works temporarily. Anyway, just some of my experiences that might be helpful. Good luck with it!

[Perry V]

K i took a diagram that was posted b4 and just edited it.... it should work....remember this would be under the double sided setup...therefore all pulleys would need to be ribbed, so even though the waterpump pulley might have little contact, it should still grip pretty decent cause of the ribs.

http://home.cc.umanitoba.ca/~umvagia0/powerdyne.jpg

i hope the link works

If the belt is still too short then we can fool around with blocking out the AC completely...i would run without the AC to make a consistent 8 psi of boost... plus it would be less drag.... and when u did want the AC back, just revert back to the "old" setup, u'd just have to change a couple of pulleys and the belt, probably take about an hour.

I dunno what do u guys think? Hey mighty thor, is there anyway you can call that guy u went to and ask him to take some measuring tape and measure how long the belt is.......just tell him to measure the half of it (folded up and all) and then we'll just multiply that by 2 to get our approximate #. I think the new diagram i posted saves us quite a bit of belt....and because i get my blower back in a week, and will be installing it anyways, i can go with my measuring tape to see exactly what length we actually need, and if that belt will fit....we might be getting somewhere here...... just if u can try call the guy and ask him to do u that favor, and then within a week or so... hopefully i can post some results for ya'll...

if that doesn't work out, Josh R was kind enough to send me some antislip tape (which i still have to send him a lil bit of $$$ for, I'll get it out by the end of the week sorry), and i'll try that on the blower pulley to see how it will work....... so we have some solutions coming up......all i have to say is that if we can get this dbl sided belt thing working that i might make the jump to the 9psi pulley, and just get a new fuel pump....and i might consider doin' a custom intercooler job for next year.... but i still don't know how reliable the powerdyne unit is... i've had some problems with it in the past couple of months and i'm kinda scared that even the 9 psi pulley will cause too much strain on it.

keep me posted.

keep me posted on what you think

[ June 06, 2003: Message edited by: Perry V ]</p>

[Riles]

It seems like taking the A/C out would hurt performance. It seems like the a/c helps the belt to wrap around the pully more than if it weren't there at all. Maybe if one wanted to remove the a/c, they could put an idler there in its place.

[Perry V]

I see where u are getting at....but i still tink slipping would be reduced quite a bit under this setup....i think the major issue that my diagrams would have to deal with is the crank..... the crank actually spins the belt, and there would only be like 50% contact on the crank pulley.... but u'll never know unless u try... i'm curious to see how much contact other superchargers are getting (from the belt on the pulley), cause i'm thinking that if ur running on the ribbed side, u wouldn't need too much to drive the thing.... again, not too sure though.

[Mighty Thor]

Perry, they are not open in the weekend. I'll try and go there again this Wednesday. Who knows I'll probably just buy it and lose $45. Well see how my money is.

The set up diagram is pretty good. But I think we'll on get 35% SC contact from the belt. But that idler pulley can be modified to be lowered, so to increase the contact.

[Mighty Thor]

UPDATE:

Hey Perry, my wife and I went to the Corvette Specialty place to measure the belt. I took my old stock belt with me to make comparison. It is still way shorter than stock.

I took a tape measure and measured it folded. It was 34-34 1/2", give or take. The whole length is probably 69" or so.

I'm still debating whether to smooth out my pulley but if we could work that length then I could certainly use this.

What do you think?

[Perry V]

thanx for the belt length,...i actually got my blower back from powerdyne today.....so within the next couple of days i'm gonna do the install.....when i have the head unit all bolted up i will measure out my different belt layout ideas.... and hopefuly 70"'s will be long enough....

i'll keep u posted on that sucker though

thanx

[foshizl]

how long is the stock belt

[Perry V]

i dunno about the stock belt..... but the belt that we run with our powerdynes is 104.5 inches long.......so we have a good 30 "'s to get rid of......that's quite a lot....but as i diagramed a few posts b4.... if we by-pass the AC and do a little bit of re-routing.. we might be able to achieve that....but i ain't too sure....i'll probably attempt it tomorrow or tuesday..

[Perry V]

good news people READ THE WHOLE POST..... got the blower back, and installed her tonight..... tried the antislip tape out....with a new belt.....man that sucker runs....i finally snagged a consitant 6-7 psi....and hit 8 at one point.... it felt great...however, i couldn't notice its full effect, as i'm still breaking in my clutch, so i didn't dump it... i just started out slow and then gave her from first to third...i can't wait to feel what it'll be like off the line..... now i will have to give it a trial period....
a) i gotta see how long the anti slip tape can hold up for
b) The belt is new and is stretching.....so i have to tighten it every so often..... it'll take me a good month or longer to give a verdict on the anti-slip tape, but i'll keep u guys posted.....
c)hopefully the BD-11 doesn't get screwed again. (fingers crossed)

so i had the blower installed and i rerouted the belt to see what length we would need for the dbl sided corvette belt. and i sized up the belt to fit my diagram
http://home.cc.umanitoba.ca/~umvagia0/powerdyne.jpg

the one minus the AC..... and here's the measurement i got....... my tensioner was not on, so we guestimated some slack for that.....and here are the results...

off of the 104.5 inch belt that we currently run with the powerdynes, we could subtract approximately 30.5 inches.... making our total of 74 inches...... now i believe u said the double sided corvette belt was about 70 inches long..... i think we are in a close range here.... we can probably also shave off some good inches if we get smaller idler/tensioner pulleys (if possible) ..... plus that double sided belt would probably stretch as well...another issue is on my diagram is the belt grabbing enough of the crank to spin everyhting efficiently...but we will never know until we do it..... so here's the deal... i cannot undertake both of these projects at the same time.... i'm already trying out the anti-slip tape.... So Mighty Thor or whoever wants too..... give it a shot.... u have the measurements now...so if u can, lets see if we can find another solution, just in case mine doesn't work...... I can see the light to a no slip world.

ok boys, i'll keep u updated on the progress....