Correcting clutch throwout geometry on stg3+

[talonXracer]

Resurfaced flywheels FTL with stage3-4 clutchs.
You do know that Exedy/Daiken manufactur ALMOST all the clutchs other than twin discs that are used in the Kseries trans.

The stage 3-4 clutchs from ACT, Centerforce, Exedy and Clutchmasters, all use the SAME pressure plate except for the exterior paint.
ACT hdss, Centerforce, FX400 pressure plates.


But they use different discs which are also from Exedy.

The ACT disc (exedy disc part# HD510D)

The Centerforce disc(exedy disc part# HD511D)

The CM FX400 disc(made by CM's own supplier supposedly(I suspect Exedy))



These pressure plates are a little on the "short side" for the installed height when compared to a stock dimension pressure plate. This shorter height is compensated for by the hydraulic system, but it places the throwout arm and slave cylinder close to half travel already. As you step on the clutch pedal the slave starts moving as well, but before the CMC has reached max travel the slave has But because the CMC is traveling it continues to pressurize the system causing the hydraulic failures seen.


This can be fixed by adding a washer between the throwout arm pivot ball stud and the clutch case correcting the faulty geometry that the stage3-4 clutchs creates and places the engagement point of the clutch pedal up off the floor.

[Jpax]

Thats one way to recycle. lol good info

[jimmyjames]

2 questions.
What's wrong exactly with a resurfaced flywheel?
Does this fix apply to all stg 3+ clutches (i.e. stg 4 competition clutch)?

[talonXracer]

Honda specifically states not to resurface the flywheel in the Helms. The reason for this is that it places the pressure plate closer to the engine and further from the throwout bearing resting position. Most stage 3-4 clutchs suffer from basically the same thing(their installed height is lower, just like resurfacing the fly with a stock pressure plate.) And when you resurface the fly and use a stage 3-4 pressure plate the installed height is even LOWER, this places more of the slave cylinders pushrod out of the slave, reducing the amount of throw available. Adding the washer behind the pivot point justs compensates for this lower installed height.

[03Si757]

I have a RED Clutchnet Pressure Plate and a Resurfaced flywheel, so I went ahead and did this trick, seems to work GREAT!

[gtimportfanatic]

thinking i shoulda done this

[jones02]

what if you get the stage 4 CC clutch and fly would you sitll have to add the washer or is it good when you have both?

[rd02SiR]

This has to be done with the tranny out eh?

I'm getting an ACT flywheel with a stage 3 pressure plate. Will I need to get the shop to do this before completing the install? Or will it be fine since the flywheel is not resurfaced.