What makes a TRA or pDrive better than the CV Tech?
I wont say which clutch is better than another; i'll say its the individual tuning the clutch, their experiences with it.
here is an article out of a tuning handbook i been writing for years (Chapter 7)
Dynamite in small packages
46 I’ve seen 340 and 440 open mods beat 700 open mods to the 60 and 100 foot mark. I’ve seen 440’s beat 600’s to the finish line. One of my favorite grass drag racing tuner-drivers to watch from 1988~1991 was an unknown guy from the Midwest, Glenn L. Traveling to many races, I spent more time in the pits talking to drivers than watching races. We became friendly enough to have a Coke and a smoke, chatting after racing.
47 Glenn, an expert at ramp grinding (which anyone can be too if they learn “where” to shape them), used Rotax powered, Arctic cat, three ramp, hex primary clutches. “You can pick these primary clutches at the swap meet for less than a carton of cigarettes. The ramps you can find them for the price of a six-pack of beer. Parts are cheap and, they’re easy and quick to tune for drag racing.”
48a Glenn made his “progress” through many mistakes. After a refining, he come to realize to make the hardest acceleration, you have to not pay attention to anyone else, no, only your own sled, that’s it. What Glenn mentions is true in certain situations. An added truth; When timing is correct, It is also good to run and watch someone who's beating you so you can gauge your own performance level and figure out where it's lacking. When you watch someone race beside you, you are paying attention to your own sled.
49 Glenn continues, “Concentrating on your own sled, when you hit the throttle, you make the engine speed up from engagement to top rpms in the right amount of time. Too quick the sled launches unstable. Engine speed too slow and the sled won’t pull. Either way, you’ll get beat off the start line.”
Hmm...Doesn’t Glenn with his own words, repeats rules to what Mr. Aaen says?
06-01:The driving clutch has one main purpose: to control the engine speed in all shift ratios.
07-02: The clutching phase begins when the flyweight force overcomes the pretension (primary spring start force) and lasts until the flyweights have generated enough side force to transfer the engine torque without slipping the belt.
06-02:Keeping the engine on power curve and pulling....
07-03: When the belt is fully engaged, the speed will continue to increase in low ratio until XXXX RPM is reached. This is called the “shift point”
Now what does it matter of what brand or style of primary clutch you have? If you have the tuning parts; then go tune it and its not the clutch, its "you" then.
Glenn used an old Beater Cat HEX primary clutch. That's what he chose to tune with and stay with it. And anyone who remembers him "Glenn ate people's lunches" One could not throw enough $$$ at a sled to beat Glenn because he had experiences that weighed more than a wheelbarrow full of money.
So now if you go to the PB-80, then you stick with it and become a master tuner for the PB-80 like Glenn did with the Hex - and eventually you'll say too; its not the clutch. its the effort "you" put into getting your own setup to work.