Clutch suggestions please

[frnkeore]

A two disk, 7.25" racing diaphragm, is light years ahead of a Long style clutch. Especially in weight and inertia. 

Road racers, where clutches, weight and inertia are extremely important, have used them since before the '70's. 3 disk 5.5" clutches were used in 700+ hp cars back in the '70's, too.

[c9zx]

Thanks Brent.

[pbf777]

  I'm using a Center Force Dual Friction

    B.T.W. Did you know that the "Dual-Friction" (and if I remember correctly this was initially a C.F. introduced product, and what elevated them as a "top-Rung" player in the market place) type clutch disks, that in the 'original' configuration, had the "organic" composite facing the flywheel and the more exotic material (Kevlar most commonly) facing the pressure-plate?  This intention was due to fact that the pressure-plate ring is generally a smaller mass than that of the flywheel but realizes the same forces and hence generally reaches higher operating temperatures and that it was the higher temperature tolerance of the not organic material, which becomes "greasy" as the bonding resins begin to cook, that led to the development of the Dual-Friction product.   

    But, . . . . . then, the manufacturers realized that the "ductile-iron" pressure-plate rings available on the market as being utilized hadn't been developed for these 'exotic' friction materials and proved that they weren't compatible, particularly from the metal displacement standpoint; so then someone looking for a "quick-fix", got the bright idea of just flipping the friction materials positions (nobody will notice!) and then declaring that you just needed to 'also' buy one their "steel" (friction faced) flywheels for compatibility!   

    But baby, this has made a lot of money for those in the industry!   

    Scott.

[My427stang]

In the late 80s or early 90s, we stopped putting Centerforce clutches into vehicles at the shop.  It was the rage for lifted 4x4s and usually ended up in heartache.

A cheap Zoom purple would last forever, the CF would smoke every time, even in little 4x4 4 cyl trucks and 6 cyl Jeeps.  I hope they have improved, but do a couple 4x4s twice and it leaves a bad taste in your mouth.

[pbf777]

       One has to give credit to C.F. in creating an increased interest in clutches; which for the most part previously were just something that someone bought like brake pads, solely because they needed it, and generally made their selection based on simple recommendations by another, . . . .  "cause it was what they were using".   

       Beginning back in the earlier '80's, presumably after the "Non-Compete Clause" lapsed after Hays Clutches had been folded into the Mr. Gasket Group, C.F. popped up with a greater some of effort in promotion, colorful shipping boxes, that 'bright' orange painted P.P. hat, and for goodness sake, don't forget the 'jingly little weights', all of which provided tangible identifiers that this product 'must be better' than the others, at least at first glance!  Never before had the subject of clutches become such a fashionable consideration!   

       Scott.

[blykins]

       One has to give credit to C.F. in creating an increased interest in clutches; which for the most part previously were just something that someone bought like brake pads, solely because they needed it, and generally made their selection based on simple recommendations by another, . . . .  "cause it was what they were using".   

       Beginning back in the earlier '80's, presumably after the "Non-Compete Clause" lapsed after Hays Clutches had been folded into the Mr. Gasket Group, C.F. popped up with a greater some of effort in promotion, colorful shipping boxes, that 'bright' orange painted P.P. hat, and for goodness sake, don't forget the 'jingly little weights', all of which provided tangible identifiers that this product 'must be better' than the others, at least at first glance!  Never before had the subject of clutches become such a fashionable consideration!   

       Scott.

Hahaha, a lot of guys I know had to remove those jingly little weights because they caused the clutch to not perform correctly.....

[pbf777]

       And then sometimes, they've been known to remove themselves!   

       Scott.

[ArtZarateJr]

Long style!

Diaphragm plates are a GM design, not really compatible with older Ford vehicles without some modification.

Modern Long style pressure plates are not the 3000-3500 lb plates of the 60’s.  Pedal pressure is not bad at all.

I’d recommend a RAM Powergrip HD.   It would be rated for 650 hp and I've never had anyone complain about the pedal pressure.

Very good engagement on these as well with a sprung hub to absorb any chatter. Metallic facing on both sides. It will require a billet steel flywheel. It will chew through a cast iron flywheel in a matter of weeks.

[ArtZarateJr]

Running this(see attachments) RAM dual disc behind a 387 and inside a Lakewood scatter shield. Using a hydraulic release bearing. Pedal effort is surprisingly light. Both disc's are organic. TILTON realase bearing works great with the TKO 600.