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Roadhawg
07-22-2008, 08:23 PM
Since the support for pulleys is some what limited. I decided to look elsewhere and found a couple 8 rib pulleys in the cobra world.
I used a 90mm Metco Cobra/Lightning tensioner pulley and used that as the base for my Mod.

http://members.cox.net/roadhawg/images/pulley/tension4.JPG

I started with a Supercoupe tensioner, which I added the heavy duty Magnum Powers spring. I then Careful used a right angle die grinder with a carbide barrel to remove approximately 1/4" of material from the tensioner body. This allows about 1/16" clearance between the pulley and the tensioner. I then switched to a 2" sanding disk on the die grinder and removed 1/8" of material around the edge of the tensioner behind the pulley.

http://members.cox.net/roadhawg/images/pulley/tension2.jpg

The end result looks like this.

http://members.cox.net/roadhawg/images/pulley/tension5.JPG

I'm just sharing information, Do This at Your own Risk.



2003 Mustang Mach1
1995 Thunderbird LX 4.6 4R70W w/Jmod, 8.8 3.27 Tracloc
1995 Mustang 4.2; MPX 25%OD, 4R70W w/Jmod, 8.8 3.73 Tracloc

Miller
07-22-2008, 08:58 PM
so how much of the tensioner is left after all of this grinding. I imagain it to be very thin ?

rzimmerl
07-22-2008, 11:49 PM
I'll be giving this a try also. Are you running the MP 10 rib kit? If so does the idler actually cover the entire surface of the belt?

nickleman60
07-23-2008, 06:57 AM
I'll be giving this a try also. Are you running the MP 10 rib kit? If so does the idler actually cover the entire surface of the belt?

Todd is running the 10 rib belt, he has the 25% OD kit on it.

kenewagner
07-23-2008, 10:01 AM
Nice work, always good to see stuff like this posted for everyones use. I might just have to do something like that as I really like the look

Ken

Mike8675309
07-23-2008, 10:08 AM
How easy/difficult is it to release tension so you can get the belt on and off? I've found when changing pullies around and different belts, getting enough room to release enough tension can be a real challenge. How is it on this one?

rzimmerl
07-23-2008, 10:11 AM
thought I'd pass these sites on as they have several different 90MM pulleys available.

www.rpmoutlet.com
www.lethalperformance.com
www.lightningforceperformance.com

Roadhawg
07-23-2008, 10:22 AM
How easy/difficult is it to release tension so you can get the belt on and off? I've found when changing pullies around and different belts, getting enough room to release enough tension can be a real challenge. How is it on this one?

Good Question,
The Belt from the Crank to the jackshaft pulley is easy.
The Jackshaft to Supercharger maybe a different story as I have Modified the Jackshaft bracket by removing some of the A/C mounting area.