Jump to content
SAU Community

Recommended Posts

Just got a new clutch a month ago and it functions fine

bite(Friction) point has always been at the top end and as it has worn a little it has moved right up the top, which is anoying to drive with...

it is a excedy heavy duty cushion button clutch.

could it be:

the way they installed it/ adjusted it?

Or anything to do with the master cylinder?

Link to comment
https://www.sau.com.au/forums/topic/159342-new-clutch-friction-point/
Share on other sites

Just got a new clutch a month ago and it functions fine

bite(Friction) point has always been at the top end and as it has worn a little it has moved right up the top, which is anoying to drive with...

it is a excedy heavy duty cushion button clutch.

could it be:

the way they installed it/ adjusted it?

Or anything to do with the master cylinder?

Mine is the same,i have an Xtreme cushion button,you get use to it mate,but yeh it is annoying.

Yeah I just got one of these Excedy hd ceramic cushion button clutches last week and now I'm regretting it, do you guys find it impossible to get off the line smoothly!!!!.

I need advice on using it, I have been giving it about 20% throttle and letting out the clutch as quickly as possible otherwise it shudders badly and feels like I'm damaging it. I'm always chug chugging of the line hoping that i dont snap a gear. Do I just need practise cos I've tried everything I can, maybe an organic clutch is better for me.

NYTSKY how do you live with it for street driving??

Yeah I just got one of these Excedy hd ceramic cushion button clutches last week and now I'm regretting it, do you guys find it impossible to get off the line smoothly!!!!.

I need advice on using it, I have been giving it about 20% throttle and letting out the clutch as quickly as possible otherwise it shudders badly and feels like I'm damaging it. I'm always chug chugging of the line hoping that i dont snap a gear. Do I just need practise cos I've tried everything I can, maybe an organic clutch is better for me.

NYTSKY how do you live with it for street driving??

Practice makes perfect,had mine for 4 months will never go back to full face plate.

Top end?

So the clutch engages just before your about to take your foot off the pedal. i.e all the way out?

I run an Xtreme 9puk ceramic. It bites hard and doesn't shudder unless your really trying to ride it in peak hour. Its basically a briskish take off. Reversing 'can' shudder a touch but its not too bad once you get the hang of it.

I've grown to really like the quick take up/grab of the ceramic puks. I could never go back to organic. :P

Initially its take up/grab point was very close to the floor

It has since worn quite a bit over almost 60,000km's, its take up point/grab is now ~1/2 way up the pedal. It still grabs hard but has started to slip occasionally on hard second gear shifts.

My only regret was opting for the 1050kg pressure plate. Its already broke my pedal box, I was fortunate enough to grab it before it completely tore the metal and was able to simply have it rewelded.

If your running a 800kg+ clutch definitely rip your pedal box and have it welded up. The poxy spot welds break easily. :S

Yeah I just got one of these Excedy hd ceramic cushion button clutches last week and now I'm regretting it, do you guys find it impossible to get off the line smoothly!!!!.

I need advice on using it, I have been giving it about 20% throttle and letting out the clutch as quickly as possible otherwise it shudders badly and feels like I'm damaging it. I'm always chug chugging of the line hoping that i dont snap a gear. Do I just need practise cos I've tried everything I can, maybe an organic clutch is better for me.

NYTSKY how do you live with it for street driving??

Do you have the stock viscous diff in it?

What I found happens with a viscous diff is it allows some slip off the line before the diff locks up. When it is in the process of locking up, you will feel some vibration (or shudder). It is more noticeable with a button, as you have to give it more to get it moving.

If you have a clutch type diff (or open wheeler) then ignore what I just said.

ps. simmyb: I know that some cars allow some pedal adjustment so the friction point will be right. You would probably find that you can do this.

Edited by Thunderbolt

The friction point is about three quarters from the floor and it will shudder if you put any load on it. I'm basically dumping the clutch with plenty of throttle to get off the line its a pretty quick takeoff all the time, reversing is bad I engage the clutch quickly and push it back in over and over to go about 3kph. For changing 1-2-3-4 its great much quicker than an organic.

Do you have the stock viscous diff in it?

Yeah I do would this be a problem anyone, Simmy do you use the stock diff?

The place where I had it fitted didn't machine the flywheel is this important?

Mine is 5 puk cushioned rated at 260rwkw

pretty sure the diff isn't a problem as I can feel the shudder through the clutch pedal might give it a few weeks and try to get used to it. Not easy going from sloppy stock clutch to a ceramic button.

a ceramic clutch will give a shudder at the friction point if released slowely with a small amount of revs. Due to the type of clutch. with good clutch work, you should be able to release the clutch over the friction point with the right amount of revs ( more than on an organic clutch) and the car should take off smoothly with a little jolt from the grip, and maybe even a small skretch from the tyres.

and yes, i have a hardcore 2 way diff!

Cubes i also feel that tiny bit of shudder in reverse.And am also running with a stock flywheel.

I think ill be upgrading the fly wheel in the future.It feels like the puks are grinding a ring into my flywheel sometimes. Must say when giving it a bit of a boot,there is no slippage at all,i also oppted for the 1050kg pressure plate,ive had no dramas yet,but will keep an eye on the pedal box from now on.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Had a go at the stuck crush tube this afternoon. Tried things like grips and a chain wrench first but wouldn't just twist straight off. So got to work with a drill. Started small and kept a depth stop on to make sure I didn't drill into the bolt. Made a line of drill holes all the way up and enlarged them. Then a combination of chisel and Dremel to split it all the way up. Levered the split to get oil in there and eventually it gave a bit while levering. Worked it back and forth with loads more oil till it was spinning freely, then with grips I could work it downwards and off. And no significant damage to the bolt (not by me anyway - just the 27 years of rust)
    • Well, I'm tired. I'm tired because about 4PM yesterday, before today's appointment someone immediately bought my bumper. They couldn't get it any other day as they're on the way back to NSW. So I had to do that big GTR conversion I had been planning. Unfortunately, the information on SAU about what you need and how this is done is incomplete. So what should be a simple bolt on affair, yeah, it's not. Did you know if you use all GTR items the bonnet won't close? This little manuever sent me into about 1am the night before trying to dodge a way to get it closed. I will have to revisit this in the next few days  - or maybe not, I may let a body shop figure it out. It all needs to come up and my motivation to pull the bumper off is low. It also seems to hit things in the bay where the GTT bonnet didn't. Yes I used 100% new OEM GTR items. Today, I had the joy of driving to the dyno looking like this: Given I had roughed in the fuel and given sensible but pretty conservative timing, I didn't really bet on having the car drive out any real difference than when it drove in. Sadly due to a miscommunication and laptop fun and games (and almost bricking the dongle, prayers and firmware updates indeed), I ended up using HP Tuner credits to licence the car that was already licenced. So in the end my laptop was used. It turns out my butt dyno is still well calibrated after all this time. The 325kw was on 74% Ethanol, the 313kw line was on 98. The other line is the 'before' line which was 281kw. While the numbers are pretty low, they're pretty in line with what you'd expect. Even if US dynos bump the whole result up about 50KW, gaining 10-15% is similar gains.  The curve of the cam is pretty much spot on with what was discussed as well. All this said, it still feels bad to not see the number you secretly want to see. Even if the car drove great beforehand, and I knew pretty confidently the car would drive out much the same way it drove in due to the nature of a wellish dialled in LS1 not gaining much if anything at all from being tuned from where it was. As expected, the car isn't particularly sensitive to running it at anywhere between 12.0 and 13.0 - And the initial timing at 20deg and 12.0 made 308KW. So 3 degrees of timing, and leaning it out to 12.7 for 5kw, anything above stopped giving any benefit until E85 (which has an additional 2 deg as before). Car itself behaved entirely fine. I found out that 100C = 1.15V! IAT at about 7pm was 19C. I might mess with the bonnet mounting.. but given the REO NEEDS TO BE CHOPPED TO FIT A GTR BAR this is possibly something I may leave gathering (more) dust until it returns to paint jail.
    • It sounds farrrrrrr too cold at your place Duncan... Here I was thinking our 10 degrees overnight is getting cold...
    • oh yeah, reminded this morning....bin lids frozen shut too
    • In my case not, because of total reno. But yeah.
×
×
  • Create New...