Thread: Os giken str
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Old 03-24-2023, 08:54 PM   #9 (permalink)
phunk
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The engagement point is already adjustable from the factory. The RJM pedal allows you to change the fulcrum point for a different travel ratio. It probably makes the top 10 must have list for the car, for anyone running aftermarket clutches. But as far as just moving engagement up or down, that is already adjustable on the stock pedal.

Try pumping the clutch 12-20 times somewhat quickly and see if the engagement moves up temporarily. If so, you need to bleed the system more. But if it stays down low, lengthen the engagement adjustment a couple turns and try again.

Note that after raising the engagement point with adjustment, you may find you need or want to adjust the bottom switch as a pedal stop to prevent over-extending the diaphragm spring in the clutch. That is just something to consider and look at. Once your clutch is entirely disengaged, you may not want the pedal to travel a ton further. I don't engineer clutches, but it never felt right to me allowing the hydraulic system to continue compressing the clutch well beyond what was necessary, and I imagine that in some applications and designs it could cause an issue.

Also note that after you install the RJM pedal, any time you make a significant adjustment to the fulcrum point, you want to confirm that your top clutch switch is still being pressed when you're off the pedal. Adjust the switch depth position as necessary. Otherwise cruise control will not work and you will eventually get an S-Mode fault (if you have S-Mode) as the system believes the clutch is always being slightly depressed.
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Last edited by phunk; 03-26-2023 at 03:24 AM.
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