Not Happy with Clutch Feel?
#61
#62
The elimination of a device designed to allow clutch slippage will actually extend the life of the clutch. However, the probability of drivetrain failure increases in the event of an improper shift (popped clutch). One would think, the drive train on a performance car should be designed well enough to withstand aggressive shifting. Maybe a bad assumption to make.
#63
The elimination of a device designed to allow clutch slippage will actually extend the life of the clutch. However, the probability of drivetrain failure increases in the event of an improper shift (popped clutch). One would think, the drive train on a performance car should be designed well enough to withstand aggressive shifting. Maybe a bad assumption to make.
"A second problem arises in that rapid clutch engagement on pull-away, engine bump start or bad gear changing, result in excessive stresses on transmission, driveline and suspension components. These can therefore be made cheaper and lighter if this effect can be reduced."
I'm not sure about the transmission itself, but expect the rest of the driveline is fairly robust. It's the same as the V8, isn't it? The u-joints, axles, etc. can handle the monstrous V8 torque.
#64
The elimination of a device designed to allow clutch slippage will actually extend the life of the clutch. However, the probability of drivetrain failure increases in the event of an improper shift (popped clutch). One would think, the drive train on a performance car should be designed well enough to withstand aggressive shifting. Maybe a bad assumption to make.
Last edited by mshedden; 02-01-2016 at 11:34 AM.
#65
Without disassembling (aka destroying) the factory part, it's difficult to know, but it may be there are 2 parts to it, a delaying piston, and an orifice of a certain size. By eliminating the piston function, you may now be getting behaviour due solely to the orifice, which may be small enough to still allow slippage(?) (or is it now free flowing, and therefore no orifice?)
#66
There's been a parallel discussion on the C30 forum that took an interesting turn recently. One of the members there took a different approach:
C30 Crew Forum
C30 Crew Forum
The following users liked this post:
Unhingd (02-19-2016)
#67
There's been a parallel discussion on the C30 forum that took an interesting turn recently. One of the members there took a different approach:
C30 Crew Forum
C30 Crew Forum
#68
The technique involves removal of the piston entirely. The piston is held in place by a pressed-in ring. The removal process is to screw a coarse thread screw (think lag screw or wood screw) into the center hole in the piston and pull. This pulls the retaining ring out too. I'll see if I can get a link to the pictures, but that'll have to be later. I need to leave for work now.
#69
#70
#71
Clutching now has a more direct feel and allows faster shifting, but the clutch still won't engage on upshifts unless you allow it to fully hook up before you get back on the throttle. (very frustrating). I am still in discussions with Clutchmasters to build us a clutch and have also opened discussions with Spec Clutch based on a recommendation by Jaron.
The following users liked this post:
Uncle Fishbits (03-01-2016)
#73
We've hit a bit of a snag on the performance clutch design. Either of the manufacturers require an OEM clutch kit, throw-out bearing and flywheel to design the new clutch. As of this time, Jag has the flywheel on back order with expected delivery not until July.
At this time, Spec seems to be the best choice for this task (thanks, Jaron):
At this time, Spec seems to be the best choice for this task (thanks, Jaron):
Last edited by Unhingd; 03-02-2016 at 02:01 PM.
#75
The following users liked this post:
Jaronstoys (03-11-2016)
#78
This project is temporarily on hold to see if the updated JLR flywheel and clutch kit resolve the shortcomings (at no cost to me). Unfortunately, these parts are on back order and I won't hear back from JLR customer service until Monday about when these parts might be available (could take months).
If the updated parts do not resolve the issue, I will restart the Spec project. To design the high performance clutch, they will need from me the OEM flywheel, clutch set and throw-out slave. If during that process they suggest building a lightweight flywheel for me, I would certainly consider it.
If the updated parts do not resolve the issue, I will restart the Spec project. To design the high performance clutch, they will need from me the OEM flywheel, clutch set and throw-out slave. If during that process they suggest building a lightweight flywheel for me, I would certainly consider it.
The following users liked this post:
SinF (03-12-2016)
#80