SR20 very weird/different clutch problem..PLEASE HELP! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

supergoob · 11-23-2008, 06:55 AM

Car: 92 240sx coupe
Engine: sr20det redtop

Alright, my clutch started slipping friday..no big deal. OEM clutch, dyno'd 248whp, so i expected a slip pretty soon. No biggy, so i bought a new clutch at the local clutch shop yesterday..clutch for a VG30, 6 puck that will hold 400hp/350ish tq relatively safely with a 2200 lb pressure plate. Sweet, so I go back to the garage, drop the tranny, install the clutch under these terms:

-Flywheel wasn't terrible. Wasn't perfect, but not terrible.
-Used an OEM SR throwout bearing
-Compared the stock pressure plate to the new one and they look the same

So we install, put the tranny back in, and give it a whirl. I start the car and put it in gear and let out on the clutch. Moves very little in 1st and reverse. So we bleed the hydraulic line. Nothing. We bleed it again. Nothing. Adjust the pedal all the way in. Nothing. Adjust the pedal all the way out. Nothing but a more solid clutch feel.

The pedal is quite stiff, so that means the shift fork is correct and the throwout bearing is making contact with the pressure plate. The Car moved once (clutch engaged like it was out of adjustment) so the splines on the clutch/tranny are all lined up. Transmission went in like butter, no binds or forcing or anything.

My only thoughts are:
My stock slave doesnt have enough "push" or "reach" i guess you could say. The VG30 pressure plate may need to be pushed in more than the stock SR, so I need to use a 300zx slave cylinder.

Or I need to run a 300zx Throwout bearing, but will it match up to the sr tranny? I dont think this is it because I have pedal and the TOB is definately making contact.

I've see lots of guys use vg30 clutches on their sr's, and a few guys around nashville use this exact same clutch. ANY input or help would be appreciated!

*fliprayzin240sx* · 11-23-2008, 11:42 AM

Ive used a Z32 TOB on my SR on my ACT Clutch. Its bigger but not sure if its thicker than the stock SR.

Burglervr6 · 11-24-2008, 11:47 PM

Just curious why you used a VG clutch?? and didn't just get the correct clutch??

supergoob · 11-25-2008, 06:19 AM

Quote:

Originally Posted by Burglervr6

Just curious why you used a VG clutch?? and didn't just get the correct clutch??

Hundreds of guys use em. Much more readily available.

apexi240sx · 11-25-2008, 12:06 PM

yea its the maximA.. CLUTCH! i run it wit sr tob and pilot... works fine... but slips sometimes when i let her have it..

supergoob · 11-25-2008, 01:56 PM

Quote:

Originally Posted by apexi240sx

yea its the maximA.. CLUTCH! i run it wit sr tob and pilot... works fine... but slips sometimes when i let her have it..

yeah the maxima ones are kinda known to do that with anything over stock power. mine has a 2200lb pressure plate and 6 puck disc...shouldnt slip a bit if the mofo will work...i still cant get this piece to work!!!!!

drftem · 11-29-2008, 03:28 AM

get under the car and have someone push down on the clutch pedal and make sure the slave cylinder is pushing the clutch fork enough. if not you might need to get rid of the damper box if you still have it.

11-23-2008, 06:55 AM	#1
supergoob Leaky Injector Join Date: Mar 2008 Location: Cadiz, KY Age: 34 Posts: 83 Trader Rating: (0) Feedback Score: 0 reviews	SR20 very weird/different clutch problem..PLEASE HELP! Car: 92 240sx coupe Engine: sr20det redtop Alright, my clutch started slipping friday..no big deal. OEM clutch, dyno'd 248whp, so i expected a slip pretty soon. No biggy, so i bought a new clutch at the local clutch shop yesterday..clutch for a VG30, 6 puck that will hold 400hp/350ish tq relatively safely with a 2200 lb pressure plate. Sweet, so I go back to the garage, drop the tranny, install the clutch under these terms: -Flywheel wasn't terrible. Wasn't perfect, but not terrible. -Used an OEM SR throwout bearing -Compared the stock pressure plate to the new one and they look the same So we install, put the tranny back in, and give it a whirl. I start the car and put it in gear and let out on the clutch. Moves very little in 1st and reverse. So we bleed the hydraulic line. Nothing. We bleed it again. Nothing. Adjust the pedal all the way in. Nothing. Adjust the pedal all the way out. Nothing but a more solid clutch feel. The pedal is quite stiff, so that means the shift fork is correct and the throwout bearing is making contact with the pressure plate. The Car moved once (clutch engaged like it was out of adjustment) so the splines on the clutch/tranny are all lined up. Transmission went in like butter, no binds or forcing or anything. My only thoughts are: My stock slave doesnt have enough "push" or "reach" i guess you could say. The VG30 pressure plate may need to be pushed in more than the stock SR, so I need to use a 300zx slave cylinder. Or I need to run a 300zx Throwout bearing, but will it match up to the sr tranny? I dont think this is it because I have pedal and the TOB is definately making contact. I've see lots of guys use vg30 clutches on their sr's, and a few guys around nashville use this exact same clutch. ANY input or help would be appreciated! __________________

11-23-2008, 11:42 AM	#2
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	Ive used a Z32 TOB on my SR on my ACT Clutch. Its bigger but not sure if its thicker than the stock SR. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

11-29-2008, 03:28 AM	#7
drftem Zilvia Addict Join Date: Feb 2007 Location: SanDiego Age: 38 Posts: 883 Trader Rating: (0) Feedback Score: 0 reviews	get under the car and have someone push down on the clutch pedal and make sure the slave cylinder is pushing the clutch fork enough. if not you might need to get rid of the damper box if you still have it. __________________ Team Thurs. Knights

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11-24-2008, 11:47 PM	#3
Burglervr6 Leaky Injector Join Date: Sep 2006 Location: West Chester Posts: 85 Trader Rating: (1) Feedback Score: 1 reviews	Just curious why you used a VG clutch?? and didn't just get the correct clutch??

11-25-2008, 12:06 PM	#5
apexi240sx Zilvia Member Join Date: Sep 2004 Location: Las Vegas, NV, San Fernando Valley, CA Age: 39 Posts: 255 Trader Rating: (0) Feedback Score: 0 reviews	yea its the maximA.. CLUTCH! i run it wit sr tob and pilot... works fine... but slips sometimes when i let her have it..