Hello.

I just did my premier run with my car and can now say that i probably need a new clutch. today i have a twin plate OS Giken with a realy heavy flywheel. the car is slipping on the clutch all the time when it gets a little hot. during the first run i slipped part of 1st gear and the whole 2nd, 3rd and 4th. now do i just probably need an overhaul kit for it or is there a better one out there.

The car has about 5-600hp on the engine but want it to manage more. doing mostly runs on the street.

 

when you installed the clutch did you do the mods recommended by OS Giken? , eg take the restrictor out of the master clutch cylinder, adjust the OS slave cylinder rod short enough so the plates are engaged correctly when lifting off the clutch pedal

 

oh didnt get any info about a restrictor. need to check it. I use the stock slave cylinder and didnt get any special slave cylinder rod with my kit. only a adaptor plate for the stock slave.

 

I removed the spring and little piece of plastic. my clutch still have to be pushed to the floor to be able to chose gear.

maybe its possible to buy another rod separatly?

 

my clutch kit looks like this
https://www.rx7club.com/3rd-gen-archives-73/os-giken-twin-plate-adapter-install-330169/

 

get rid of that clutch....i had one and it slipped too making 650hp.

It will cost you as much as a new one to rebuild when i got quoted from OS Giken for a re build kit......i sold mine and went back to a single disc with better puck and better pressure plate,have never had any issues since then.

 

ok wich clutch should i get? my goal is 700hp so i know this wont hold but i dont want to spend an fortune on a clutch now in the beginning of the season.

 

Is it possible to just make a rod out of an old bolt or something? how long should it be?

 

ACT seems to be pretty darn good as far as single disks go. Otherwise, I've been super happy with my Quarter Master dual, I wouldn't do it any differently. Either way you'll need a new flywheel anyways, and if you pull your current clutch off now, it may still be salvageable enough to get some re-sale value.

 

Ahhh so you dont have the adjustable rod that came with the push pull kit?

you could make one, the bolt would need to have domed end , or you could buy one of OS Giken themselves should not be to much

THis is probably the reason why you are finding it hard to change gears, the stock rod is not long enough

 

ahh then maybe i have pushed the pedal adjustments to far so i am slipping a little bit on the clutch all the time?

 

yes thats what it sounds like to me

 

Which one are you using now?

 

I got a OS GIken TS2B that i haven't installled. It did not come with that hydrolic thing. Im assuming the 13Bt/ T2 tranny dosn't need it?

 

If the rod is too short, which it sounds like it is, this would cause the clutch not to disengage all the way when the clutch pedal is pushed down, which would make it hard to get the transmission into gear/grind. This should have nothing to do with slipping. Once the transmission is in gear and the clutch pedal is out the discs should be locked. If you are having a slipping issue it's not because of a rod that is too short. Now if the rod was too long then this could cause the clutch to slip because it would not release the pressure plate all the way and would be slightly actuated causing the clutch to slip, but would be really hard to install if it was too long.

 

Thats what i was thinking. After i posted the above it really had me thinking. the only way a clutch could slip is if A. the front cover is not bolted on all the way, witch im sure that would be obvious very quickly or B. the Rod is to long and won't let it disengage. If that was the case it would be very hard to put the cylinder after you installed the clutch or vise versa.

 

but if i push the master cylinder to the max at the beginning to push out the slave just a little extra to get into gear because. wouldnt that mean that if i get a longer rod, i wouldnt have to adjust the master cylinder so much that i can have it at normal setting.

 

I use the ACT maxx I'm pushing over 700rwhp without problems.

 

The floater plate on some twin disc clutches can be put in backwards causing it to be difficult tho shift and will slip.
Pull the inspection plate and make sure its faceing the right direction.

Dont ask how i know this.

 

^^that would really suck lol.

 

Yes, the longer rod will help you get it into gear, but what I was saying is that if you are having a slipping problem then it has nothing to do with the rod being too short. You either have the clutch installed incorrectly or have a POS clutch.

 

ok i changed to a longer rod. the anoying thing is that i made the rod too long this time so i need to make it just a little shorter and hopefully the slipping will end.

i inspected the slave cylinder and i can say that it was only possible to move it less than an inch with each pedal push. got a longer rod and bleed the cylinders and wow what a difference. it instantly moved back an extra 1.5 inches.

 

if you are interested i have a RX7 FD3S ORC racing 3 disk clutch kit 1993-2002, light flywheel, and push type kit. I only used it for around 50miles but the car is making too much power and i have to change the transmission to a T56 so i cant use the stock clutch. if interested let me know its good to 800torque

 

Awesome. I found my clutch thanks to you.

 

is the flywheel lighter than the stock one? The one Im using right now is heavier. isnt heavier better for dragracing?