RJM Clutch Master Cylinder Kit?

nandosman

About to pull the trigger on the RJM Clutch Pedal, and I see on their website the kit with the CMC. Has anyone tried it? Is it the same thing ZSpeed has? Not sure if I should hold to buy the kit, or just buy the pedal now, and buy the CMC fix from ZSpeed (or someone else) later. Any advice?

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FI Non-Res Test Pipes | FI 18" Res CBE | Stillen Gen 3 CAI | Dynotuned @ Dynosty EcuTek 325 whp

370zBLAST

Which one are you referring to on zspeed? Only one I saw on his web was for the 350z?. I bought the kit (pedal and cmc) so far so good, my pedal actually stiffened up a bit with the new cmc. I was replacing mine that was on its way out.

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Quicksilvers

The custom heavy duty RJM Performance clutch master cylinder and RJM Performance clutch petal is what I installed after my Nissan OEM clutch master cylinder began slightly leaking. Your petal will be more firm but is a must have mod for anyone with a manual Z and the CSC fix. You having everything to benefit from installing a RJM Performance clutch master cylinder I highly recommend one. This is a great time to consider installing a heavy duty clutch kit too. I went with the Z Speed Performance CMAK CSC at the same from Joe.

nandosman

So the RJM kit isn't the same as the ZSpeed one?

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FI Non-Res Test Pipes | FI 18" Res CBE | Stillen Gen 3 CAI | Dynotuned @ Dynosty EcuTek 325 whp

370zBLAST

Maybe the same concept as "Heavy Duty" BUT RJM builds his own CMC in house

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Quicksilvers

The RJM Performance clutch master cylinder is a custom heavy duty clutch master cylinder unit. The Z Speed Performance clutch master cylinder is a Nissan OEM clutch master cylinder unit that deletes the clutch damper on the G37. Read up on the clutch cylinder adjustment. Clutch master cylinder failure can happen on the 370Z/G37 but is not a common problem on our 370Z.

nandosman

I'm aware of the CMC issues with our cars, that's why I was asking about the kits. I'm under the impression that both kits are to fix the same issue, am I wrong?

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FI Non-Res Test Pipes | FI 18" Res CBE | Stillen Gen 3 CAI | Dynotuned @ Dynosty EcuTek 325 whp

370zBLAST

Some have never had an issue with the CMC. But ive personally been threw 3! 2 factory and 1 luk brand same outcome. Ill no if its money well spent in a year. I upgraded my csc and now i upgraded the pedal and cmc too, see how it holds up.

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Quicksilvers

Both the RJM Performance and Z Speed Performance clutch master cylinder kits are both to fix the possible issues with the Nissan OEM clutch master cylinder. My Nissan OEM clutch master cylinder failed just after a track day as I said clutch master cylinder failure can happen. That is why it is best to install a heavy duty clutch master cylinder and correct it before it can become a issue. The bonus is you can completely flush all your fluid with better fluid.

nandosman

But you said you got the RJM AND the ZSpeed one, so I got a little confused there

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FI Non-Res Test Pipes | FI 18" Res CBE | Stillen Gen 3 CAI | Dynotuned @ Dynosty EcuTek 325 whp

40 to 332

RJM makes a heavy duty clutch master cylinder (HD CMC) as well as a clutch pedal assembly. Z Speed makes a heavy duty concentric slave cylinder (HD CSC) as well as a clutch movement alteration kit (CMAK) that moves the slave cylinder outside the transmission bell housing. Z Speed also makes a HD CMC, but it's only for the 350Z and not for the 370Z. It's generally recommended that the CMC be changed any time the CSC is changed. Trust this clears up the confusion.

nandosman

Ah, I see, so people buy everything? HD CMC kit, HD CSC kit, and CMAK kit. I think I will just buy the pedal then, and buy that stuff later, when finances allow it.

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FI Non-Res Test Pipes | FI 18" Res CBE | Stillen Gen 3 CAI | Dynotuned @ Dynosty EcuTek 325 whp

AARONHL

I've read that if you replace your master cylinder the slave cylinder will go soon after that. So better save some $ quick for that CMAK external slave and clutch/flywheel kit.

I just went with the factory master and CMAK slave

370zBLAST

I thought people ran into issues with the CMCK? With always going out of adjustment? I went with HD CSC, RJM CMC and the pedal

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JARblue

CMC = clutch MASTER cylinder. CSC = clutch SLAVE cylinder. Two different parts.

Aftermarket slave cylinders from ZSpeed are the HD CSC (internal option) or the CMAK (external option). Don't buy both.

That would be the Z1 CSCEK that has issues. I have one. Will be going to the ZSpeed CMAK (external) when I replace the clutch. The CMAK is self-adjusting.

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