Jump to content
SAU Community

Recommended Posts

Hi all,

I need a new clutch in a GTR with ~250rwkw (std turbos with PFC, EBC, and poncams) that is driven daily in Sydney traffic. I have the option of a custom built strengthened single (Jim Berry), vs a OS giken twin (~2 x price), vs a Nismo Gmax twin (~1.3 x price).

MOstly I am interested in holding the current power with no real plans for turbo upgrades or much beyond current power.I have heard good things about the driveability of the Nismo coppermix, but nothing about Gmax, has anyone use dthe older one?

Can anyone comment on the driveability of a Jim Berry single vs the twins for clutch feel, take-up point, driveability, and slip rate?

Cheers

Thanks

Ned

Link to comment
https://www.sau.com.au/forums/topic/141978-gmax-vs-coppermix-vs-os-giken-twin/
Share on other sites

whats a Jim Berry clutch twin plate worth or even some details on the single plates would be good? Not sure how an OS giken (can be had for around 1800 if you look hard enough) costs twice as much unless Jim Berry singles does some damn cheap singles. From the people I've spoken to, a lot of single plate puck clutches can be damn right nasty to drivetrains and gearboxes and I have been recommended to steer clear of them unless i wanted to. Nismo G-Max clutches are no longer made and are replaced by the coppermix ones. The Coppermix ones are probably the easiest to drive with out of any twin plates other than the carbon ones. Os Gikens are the cheapest twin plates to buy plates and parts for out of any twin plate - though some clutch places seem to want to charge the earth for them still >_< Os Giken seem to still be bitier than the Nismo Coppermix ones but I'm not sure what their like compared to the Os Giken STR as I'm yet to drive my S13 with one but I'll let oyu know how it compared to the old OS Giken I had.

whats a Jim Berry clutch twin plate worth or even some details on the single plates would be good? Not sure how an OS giken (can be had for around 1800 if you look hard enough) costs twice as much unless Jim Berry singles does some damn cheap singles. From the people I've spoken to, a lot of single plate puck clutches can be damn right nasty to drivetrains and gearboxes and I have been recommended to steer clear of them unless i wanted to. Nismo G-Max clutches are no longer made and are replaced by the coppermix ones. The Coppermix ones are probably the easiest to drive with out of any twin plates other than the carbon ones. Os Gikens are the cheapest twin plates to buy plates and parts for out of any twin plate - though some clutch places seem to want to charge the earth for them still :happy: Os Giken seem to still be bitier than the Nismo Coppermix ones but I'm not sure what their like compared to the Os Giken STR as I'm yet to drive my S13 with one but I'll let oyu know how it compared to the old OS Giken I had.

Jim doesn't sell full clutch kits as far as i know, he just rebuilds them, costs around a grand to have your single or twin rebuilt from him, easy to drive and he says will hold big power....

Hi there,

the JB was about $1300, the OS Giken from otomoto delivered was ~2500, and I found a Gmax for ~1700, so theres a fair range. The coppermix aren't available locally that i can find, so at the weight and with potentially GSt and duties wfrom Japan, would be around the OS Giken price I guess.

Cheers

Ned

I have a Nismo Gmax twin and its not really fun for daily driving. I was ok with it after a day or so but still stall it every now and then, especially after driving other cars for a while.

Pick up point is ~2/3rds of the way up and its got very little give between off and on.

Not many (if any) of my friends can drive the car anymore but doesn't slip one bit!

I have a Nismo Gmax twin and its not really fun for daily driving. I was ok with it after a day or so but still stall it every now and then, especially after driving other cars for a while.

Pick up point is ~2/3rds of the way up and its got very little give between off and on.

Not many (if any) of my friends can drive the car anymore but doesn't slip one bit!

The pickup point can be adjusted to be closer to the floor you know. The coppermix is 100 times better than the old G-Max, for one the clutch plates are full face not puck type.

Thanks for the replies. Jim Berry does sell complete kits, but as you say its from rebuilt hardware and new plates etc.

I have taken a punt on one of his strengthened singles (sprung organic) which will clamp to 3000lbs vs 1900 for the stocker. It comes witha new lightened flywheel, and since I couldnt read a bad thing about them, I decided to save the extra G over the OS or Nismo and put it toward other things. Hopefully I am still smiling in 12 months.

Cheers

Ned

You didn't go for a carbotic one? I've always thought all the hot Jim Berry clutches were carbotic not organic. Or am I confused?

Hi there,

Jim tells me he has a variety of materials at his disposal, with organic giving the closest feel to stock, carbotic taking more punishment again, then I guess its carbon or kevlar. Since I commute 45mins each way daily, his recommendation for a clutch that is easily lived with was, strengthened single in organic.

cheers

Ned

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

    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
    • You haven't driven many modern cars then have you? Most of them have sfa steering feel with their stupid electric bullshit steering systems.
×
×
  • Create New...