Jump to content
SAU Community

Clutch Problems, Supercopper Mix 34 Gtr

dodd1990
 Share

Recommended Posts

dodd1990 Contributor

dodd1990

Posted
Posted

Hey guys, just a question to throw out there, But I have a 34 GTR running 350kw with a Nismo supercopper mix which is only 6 months old.

However the clutch pedal has recently been getting softer and seems to have less travel, does anybody know what causes that? ive bleed the clutch but that didnt seem to fix anything.

Also my old R34 had clutch problems with the hydraulic parts, and i dont want to waste money with the GTR, is it possible to convert it to a pull type cable clutch?

post-66547-0-88650500-1332659985_thumb.jpg

GTRNUR Grand Master

GTRNUR

Posted
Posted

Have a look at getting your slave cylinder re-sleaved. Its probably leaking past the piston and reducing travel at the throw-out lever. The master cylinder can also need attention, but usually the slave is in worse shape.

Also bleeding these can be tricky, as they have a loop for "cooling" the clutch fluid... which creates a nice air trap. Look for a block with a bleed fitting located directly down and back a bit from the clutch master cylinder.

The only upgrade worth considering is swapping out the loop and stock plumbing for the nismo braided hose that goes directly from the master cylinder to the slave.

Push to pull conversions relate to using different types of clutches in the R34 gearbox. All require gearbox removal. None would use a cable. They are all hydraulic and all use the booster so that your pedal doesn't feel like your driving a 5 ton truck. The stock systems work perfectly when they are in good condition.

dodd1990 Contributor

dodd1990

Posted
  • Author
Posted

The only upgrade worth considering is swapping out the loop and stock plumbing for the nismo braided hose that goes directly from the master cylinder to the slave.

I have decided to upgrade with a braided hose straight to the slave, but would u recommend the nismo slave or a genuine Nissan one? can the genuine one handle a supercoppermix clutch? or am i wasteing my time with that? also im sure its on SAU somewhere but its a R34 GTR a push or pull slave cylinder lol ?

GTRNUR Grand Master

GTRNUR

Posted
Posted

Keep the standard slave cylinder and just re-sleave it. Once its fitted with a stainless sleeve it will out-last the life of the car.

The Nismo one has reduced throw due to having a larger piston bore, and can lead to problems like you are already having.

The braided hose is really going to help you bleed it properly.

Standard copper mix clutches handle 400kw easy. They rate them as a 600ps clutch (around 590-600hp). There is a competition version that is rated at 780ps if thats not enough. I've got a modified early version in my car and its still mild enough to drive to the shops or in slow traffic.

Edit: All slave cylinders "push". Its the operation of the throwout lever moves the throwout bearing that determines push or pull type. R33/R34 and some late R32's are pull. R32 are push.

R.3.2.G.T.R Grand Master

R.3.2.G.T.R

Posted
Posted

Keep the standard slave cylinder and just re-sleave it. Once its fitted with a stainless sleeve it will out-last the life of the car.

The Nismo one has reduced throw due to having a larger piston bore, and can lead to problems like you are already having.

The braided hose is really going to help you bleed it properly.

Standard copper mix clutches handle 400kw easy. They rate them as a 600ps clutch (around 590-600hp). There is a competition version that is rated at 780ps if thats not enough. I've got a modified early version in my car and its still mild enough to drive to the shops or in slow traffic.

Edit: All slave cylinders "push". Its the operation of the throwout lever moves the throwout bearing that determines push or pull type. R33/R34 and some late R32's are pull. R32 are push.

who does re-sleaving, powersteering joint? any business u recommend i can check here in syd?

GTRNUR Grand Master

GTRNUR

Posted
Posted

who does re-sleaving, powersteering joint? any business u recommend i can check here in syd?

Anyone that does brake system reconditioning work such as caliper refurbs etc should be able to do it.

dodd1990 Contributor

dodd1990

Posted
  • Author
Posted

Does the nismo braided hose bypass the dampening/cooling circuit? How long is the hose? It must be like 40-50cm long if it does? I've been trying to buy one but don't want to buy the wrong thing

GTRNUR Grand Master

GTRNUR

Posted
Posted

Yes it replaces the loop. Everything you need to know is in the part description here...

http://www.rhdjapan.com/nismo-stainless-braided-clutch-hose-bnr34-r34-12334

You can probably source it in australia easily enough though. I've seen them on Ebay occasionally and just jap or high octane probably have them in stock too.

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Kinkstaah
      WTB R34 GTR Guard Liners

      By Kinkstaah · Posted

      Ah! I actually managed to snag a lightly used set.... that aren't so suitable for me right now. They don't work on a GTT without some cutting or creative heat moulding. I thought about reselling them myself cause I didn't want to murder them, but it looks like I'm probably going to attempt to murder them/melt them because I may as well. @GTSBoy @PranK can somebody close this thread?
    • itsmeyo
      WTB R34 GTR Guard Liners

      By itsmeyo · Posted

      Hey mate,  I have a set, one is slightly damaged but wont be noticable once installed.  Shoot me a message if your still after them 
    • The Bogan
      NC MX5

      By The Bogan · Posted

      I couldn't wait But, the black constant tension hose clamps were too thick and there wasn't enough clearance at the T/B and I couldn't get it to seat properly, so I had use a silver one there I also added some 3" silicone over the alloy bit that goes through to hole on the radiator support as it looked like it was sitting on the edge of the hole in the radiator support, I never noticed a rattle or anything, but there was a witness mark It is basicly done, and I can live with the silver hose clamp at the T/B, I will get a black clamp for the head vent though where it is attached to the bulkhead fitting  It never stops...LOL, only issue now with the shock tower brace is it slightly touches the under bonnet liner now, if I leave it it will either wear some paint off the brace where it touches, or damage the liner, so I removed the liner to see what I have to work with, with the liner removed I have about 20mm of clearance, but sadly the middle part of the underside of the bonnet is only dusted with paint and looks crap, so I cannot have that, but.... as I have a roll of Carbuilders premium under bonnet insulation in the garage laying around that is only 5.5mm thick (we were going to use it on the boys Patrol, but he crashed the front of it a few months and it was written off, hence why he now drives my old Honda Accord Euro), I'll use the OEM liner as a template and get the Carbuilders stuff fitted up to cover that dusted paint up
    • Kinkstaah
      From Japan and back to Europe, my sh*tbox R34 GTT

      By Kinkstaah · Posted

      You have a knack for photography my friend. It makes the 86 look like a complete bucket. The 34 went with you to Europe and back. It's special. (we all feel the same about our 'shitboxes' that every bystander seems to absolutely love)
    • Dose Pipe Sutututu
      From Japan and back to Europe, my sh*tbox R34 GTT

      By Dose Pipe Sutututu · Posted

      LOL.... you are correct there.
×
×
  • Create New...