Clutch Stinking/slipping

[Rorden]

Hello I have recently done a manual conversion on my r34 gtt using r33 series 1 bigbox. Car is a totally different beast. My only problem is a slip stick. I can drive at full boost 1bar with no problems. Labour it in 5 and put my foot down and no slip/stick. Light it up in first and no slip as soon as I change to second this is where the problem is. The pedal doesnt come all the wayback stops half way. I have brand new master and braided line. Second slave. Could this be the problem. Clutch is a 6 puk bronze button that has done 800km. My other question is why is my pedal so soft. My 87 mazda b2000 clutch is harder. Why is it so soft.

Kind Regards Rorden

[89CAL]

usually the pedal not coming back up is the pivot ball broken.

If the pedal is only half releasing then that will be your slipping issue, odd that it is only happening in 2nd but

[Rorden]

The funny things is tho. I can drive under full boost and change through all gear no problem at all. Its only when im doing a burnot from first to second it happens I havent tried 2 to 3. Its doing my head in.

[89CAL]

Did you say you have a second slave cylinder? Or does this mean you have replaced it?

Check for a kinked line or something. If a lines kinked the oil wont return to the master/reservoir instantly and will cause momentary slip if you drop the clutch.

Thats about the only thing I can reccomend unless you literealy meant you have 2 slave cylinders, which I'm not quite sure how you would do on an R33 box as there is only provision for one cylinder

[GTSBoy]

He meant 2nd hand.

The problem could be broken pivot ball like Cal said, but it does sound more hydraulic. The 1st - 2nd gear shift is usually a quick one when you're going for it. Perhaps that's why the problem is most noticeable then. Maybe there's some internal leakage or stickiness in the slave that leaves it partly disengaged for a moment too long as you lift up off the pedal.

I wouldn't have done the conversion with a 2nd hand slave. They go in the bin, new slave goes on. I'd try that first before looking for anything else. but while you are crawling around you'd best look at the pivot ball, and also have a good look at the pedal box that you bolted in. Look for cracks. You might want to get down there on your back with a torch while someone else (carefully) operates the pedal. Any cracks only become obvious (when it's installed) when it's under stress.

Another thought....have you set the pedal free pay correctly? You need at least a few mm of free play at the top of the stroke before engaging the hydraulics otherwise you load the throwout bearing all the time......this might just lead to your problem.

[89CAL]

ahhh 2nd hand. Seems obvious when I think about it now lol........

[Rorden]

So i have replaced slave cylinder checked my braid line for kinks, i dont think its my pivot ball as it would do it in all gears. fixed the pedal so it comes back fine. went for a drive and its worse slipping real bad. Next step is play around with the pedal adjustment.