We are looking for a few good EVO’s with big time, high horsepower to help test the latest in carbon clutch technology. This is an all new design with “push style” technology for EVO models 6-10. We need your immediate help and real world data from those who can push the limits. Please PM me with your contact info so we can learn about your car’s potential.

Thanks,
Ed Marx

 

Push style? I guess that the old DSM crankwalk may be making a comeback and on an evo for the first time. Why in the world would you want to go with a push type clutch when pull type is better in every way? Less pedal effort, less pressure against the crank, all equating to a lighter pedal that can hold torque more safely than a push type without causing damage or making your leg tired. Not trying to knock your product, but I see this clutch design as a step backwards.

 

Tilton clutches for the CT9A's also were push style. I guess there's a reason for it.

 

I wouldn't be willing to help, solely on the basis of no company info or any of that...

 

AMS released a push style option for the VIII/IX a few months back, they use it.

 

That is a valid point. My name is Ed Marx, and I come from a hard core drag racing background with over 15 years of driving and mechanical experience in Funny Cars and Pro Mods. My specialty is clutch set up and maintenance. I met Rob Smith, the owner of RPS at the races and after seeing his products, I have agreed to help him find some hard core racers that can help him field test his new carbon clutch product. Hence my post.

Ed Marx

 

I still don't understand why you would want a push type, it's older technology and it has no benefits that I can think of. Pull types have better leverage to pressure ratios enabling less stress on the crank and less leg effort while holding as much torque as you would ever need, as long as your pressure plate and disc are up to the task, which is no different than a push type.

 

RPS makes a bad *** clutch, but I still don't understand why push type? Is there a benefit to that over pull type that I am unaware of?

 

HAving a push style is best IMO...

you dont have to worry about the retainer clip "popping" out of place and having to drop the tranny for that bs...

id say id be down to test it but im no where near big HP

friend is running a Quarter Masters on his... and i LOVE it

 

Great points and let me try to go into a little more detail about the RPS product and its unique “push style” advantages. In the past, the DSM group experimented with a push style clutch with extremely high clamping forces, in excess of 2600lbs. This high clamp force caused crankshaft walk and bearing failure. This is where the “push type” clutch set up got some of its bad rap but for obvious reasons, as you noted! I can tell you the new RPS product uses a strapless, billet cover that has enough clamp load to hold big power, without stressing the crank thrust bearing or drastically increasing pedal pressure. Expect about a 10% increase in pedal feel over stock with a smooth, predictable engagement. How is this verified? In house load sensor testing has enabled RPS to confirm these numbers with great accuracy and is recorded on every completed unit. This testing also gives the racer a baseline for future testing. They have spent a great amount of R&D time creating a package that basically has the best of both worlds. With this understood, let me give you some “real world EVO reasons” why the push style design is better. As HP and boost levels increase, two step drag race launches kill the pull style clip causing premature failure. The clip is eliminated with the “push style.” A strapless one piece Billet cover also eliminates strap failure from downshifting and hard burnouts as well as significantly reducing rotating inertia.

Ed Marx

 

how much hp do ya'll consider HIGH hp???

 

I concur. That stupid retainer clip breaks all the time on the pull type clutches when pushing big power. STi's and EVO's break them all the time. I'm definitely going push style probably Carbonetic which has some great carbon clutches.

 

PM'ed

 

Very interesting. I didn't realize that pull type clutches had that weakness . Just out of curiosity though, I've heard bad things about carbon clutches along the lines of them wearing out quickly due to slipping a lot when they are cold. Since they don't start really grabbing until they are warmed up they make great racing clutches but not the best street clutches. Is this off base, or is there some truth to this? By the way, pretty impressive background! Funny cars huh, not quite as fast as the X, but still quick. Just kidding, obviously.

 

True that carbon clutches do slip more when cold but really that isn't a large issue unless you're going to launch the car when ice cold at full boost which I doubt anyone is going to do. I have used carbonetic carbon clutches for 6 years now with only having had ONE wear out after 50,000 miles and that was a single carbon plate. The twins and triples I have never had wear out before regardless of the abuse they endure. In fact the incredible longetivity and streetablity of carbon is the reason I prefer them over the common cero-metallic multi plate clutches.