20B 500rwhp - will ACT Heavy Duty Pressure Plate hold up?
07-23-15, 11:16 PM
#1
20B 500rwhp - will ACT Heavy Duty Pressure Plate hold up?
20B 500rwhp - will ACT Heavy Duty Pressure Plate hold up? Or do I need to get the Xtreme
**NOTE**: this is NOT a drag car or car that will be 'launched', its my road race car.
The disk is not an issue as I use a racing ACT 6 puck solid disk, and it is very aggressive but perfect for road racing. The problem is the pressure plate, I need something that can hold 500rwhp without slipping.
I have searched and read threads touching on this, some say the Xtreme is to 'heavy', making the clutch pedal to hard to push and in some cases breaking clutch pistons and the bearing fork, et. Some said the Heavy Duty has better pedal feel and can hold 500rwhp just fine with the exception of hard launches.
I would get the Heavy Duty if I knew for certain it will not slip at 500rwhp during 'normal' acceleration up the gears, that is to say, not dead stop launching. Anyone have direct proof of this, something like 'ya I have a Heavy Duty and make 500+ and it did not slip on the dyno runs' or something similar.
On the other hand, I can be convinced to get the Xtreme if the cases I mentioned above are not typical, although if the pedal is REALLY stiff, it could be an issue of leg fatigue during a race LOL
**NOTE**: this is NOT a drag car or car that will be 'launched', its my road race car.
The disk is not an issue as I use a racing ACT 6 puck solid disk, and it is very aggressive but perfect for road racing. The problem is the pressure plate, I need something that can hold 500rwhp without slipping.
I have searched and read threads touching on this, some say the Xtreme is to 'heavy', making the clutch pedal to hard to push and in some cases breaking clutch pistons and the bearing fork, et. Some said the Heavy Duty has better pedal feel and can hold 500rwhp just fine with the exception of hard launches.
I would get the Heavy Duty if I knew for certain it will not slip at 500rwhp during 'normal' acceleration up the gears, that is to say, not dead stop launching. Anyone have direct proof of this, something like 'ya I have a Heavy Duty and make 500+ and it did not slip on the dyno runs' or something similar.
On the other hand, I can be convinced to get the Xtreme if the cases I mentioned above are not typical, although if the pedal is REALLY stiff, it could be an issue of leg fatigue during a race LOL
07-24-15, 10:49 AM
#5
I would at minimum use the ACT
MZ010X - P/PL Xtreme pressure plate.
I have the Xtreme and a sprung 6 puck and it did hold my 420rwhp/415rwtq in my light FC, but there was one time I pulled off after a 4min session where I had to push the clutch and rev the engine a couple times to unstick the puck- so it was probably on the edge of slipping.
I never had a problem with the clutch pivot ball or pedal effort- I think those problems are with the MZ010XX - P/PL MaXX Xtreme.
I vote for going straight to Exedy twin disk. Got one in my FD and it is way more civilized yet holds very tight.
MZ010X - P/PL Xtreme pressure plate.
I have the Xtreme and a sprung 6 puck and it did hold my 420rwhp/415rwtq in my light FC, but there was one time I pulled off after a 4min session where I had to push the clutch and rev the engine a couple times to unstick the puck- so it was probably on the edge of slipping.
I never had a problem with the clutch pivot ball or pedal effort- I think those problems are with the MZ010XX - P/PL MaXX Xtreme.
I vote for going straight to Exedy twin disk. Got one in my FD and it is way more civilized yet holds very tight.
Trending Topics
07-24-15, 04:32 PM
#8
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,796
Received 2,574 Likes
on
1,830 Posts
i think the xtreme with the iron cross is only rated to like 450lbs/ft, so it would live with 500 on the street ok, and just wear quickly. race car would eat it
07-26-15, 04:21 PM
#10
I have the act extreme pressure plate in my FC with their street strip disc (and prolite flywheel) and it holds at 460rwhp. My torque is under 400 ft/lbs. I have bent my fork and broken my ball pivot (on separate occasions) with this pressure plate. It doesn't slip at all.
