Twin Plate (Driver?) Issues From Stop To Start

[CruisingFast]

Hi Guys & Girls,

I just had a full rebuild done on my motor and with some future plans to go down the single turbo route for 350-450kw atw I decided to invest in a twin plate whilst the motor was out. I've never owned a twin plate before and I did some research and figured the Nismo Super Coppermix would be the easiest given the car was mainly going to be street driven. After talking to the manager at the workshop doing my car I was persuaded that a NPC twin plate would be the way to go due to the cheaper rebuild costs. So that’s what I have now and after taking the car back last week I'm really struggling with it.

From a pedal pressure point of view the clutch is really easy to engage and not heavy on the foot. The problem I have though is getting moving again from a stop, it's even more difficult on a hill or in a stop turn left/right scenario. It also happens in reverse. I also got Nismo GT Pro 1.5 lsd's fitted front and centre and have taken it back to the shop to adjust this to Light setting as this wasn't changed from the Medium it normally comes shipped in. I've only done 40 km's thereabouts as I wanted to take it back to the workshop as it didn't feel right. The clutch feels very on or off and when I attempt to release the clutch a little with light revs to gain gentle forward/back movement the whole car feels like its shuddering and really not liking the whole deal of the clutch being engaged slightly when applying a little throttle.

I'm sure there is a technique I need to learn and the workshop have said as much and will be doing something tomorrow I was just curious to hear from others with a twin plate to see whether this was something other people had experienced and what they did to overcome this in the general stop/start nature in regular traffic. Also when reversing or parking into tight places how can you fully release the clutch in those forward and back situations without some clutch being engaged to prevent the whole thing surging. It doesn’t make sense when using low revs and only half releasing/riding the clutch that it wouldn’t move ever so gently in those tight situations.

Any tips or advice is appreciated, I really hope there is a technique to this all that I’m missing as I spent some time in a vacant parking lot trying different things and whilst I only stalled it once I almost never got a clean run from those stop situations mentioned before.

Edited July 5, 2011 by CruisingFast

[xALmoN]

i pulsed the throttle a little bit, when i had that os giken troll clutch

[boostn0199]

Takes some getting used to but basically i find you have to release slowly from the friction point but not over doing the throttle so as to not ride it. I know prob doesnt make any sense in words but try to work on finding the right speed releasing the clutch with right amount of gas its not like normal clutches where you can almost similtanously do it and get a good smooth start.

[ido09s]

They certainly take some getting used to thats for sure. Dont slip it to much or you will fry it, multi plates arent really designed to be slipped. You need to find the friction point and get the car rolling then get off the clutch as quickly as possible. I am not talking about rev dump type get off it, but once its moving drop the throttle off a little and out with the clutch. The small ammount of speed the car has should be enough to enable it to keep moving, in most cases anyway. On hills you will just need to find out what works best

I would also suggest a Nismo slave cylinder. I could drive the triple we have but i just hated having to think about the clutch every time i drove the car. Using the Nismo slave cylinder has definitely changed the way the clutch takes up and has made it a lot nicer to drive. I dont know what car you have but here is the link to the Just Jap site which has them

http://justjap.com/store/home.php?cat=277&sort=orderby&sort_direction=0&objects_per_page=50

I use to love placing bets with customers on how many times they would stall the car before it left the driveway of the workshop My money was on 5 or more times and i was right about 99% of the time. The driveway was only 30 metres or so long as well hehe

[CruisingFast]

Thanks guys for the feedback. I've had some adjustments made to the clutch and diffs which has made things easier. The clutch engages lower now in the pedal and is easier getting out smoothly from a stop.

The heavy steering and vibration feeling I was getting when turning was actually the diffs binding up which they're meant to do.. it definitely feels different though I don't think it will take that long to get used to everything.

[Yts]

Thanks guys for the feedback. I've had some adjustments made to the clutch and diffs which has made things easier. The clutch engages lower now in the pedal and is easier getting out smoothly from a stop.

The heavy steering and vibration feeling I was getting when turning was actually the diffs binding up which they're meant to do.. it definitely feels different though I don't think it will take that long to get used to everything.

it get easier with time, i found also that full pressure on the accelerator doesn't make it easier to get away, i try and tap the accelerator a little while i am taking off and when you feel it go to engage keep the accelerator pressure on. hard to explain other than that. i let all my friends try and drive the car occasionally and they all just about stall it, so its nothing new. although my clutch is now a little more forgiving then what is was when i first got it.