Nismo Coppermix Twinplate Clutch

[Brandon]

Anyone got any idea whats the difference between these 2 other than the cost (standard is around $300 cheaper)? Is it worth the extra if you're just after 300kW or potential 400kW at the wheel? The reason why i've gone with the twin and not single is because of the ocassional launches. Check (if you live in usa): CVS Weekly Ad, or Myer specials. I'm assuming the twin will be bullet proof at that power with launches. One more thing is, the main reason for going with the Nismo is comfort and reliability. If the standard one does the job and is easier on the foot, I would choose that over the competition one. Cheers.

[Ant97GTR]

The Nismo coppermix twin is an awesome bit of kit - most of the vic track gtr's run this clutch including mine. Supposedly the competition is rated for higher kw's but I pretty sure the std twin has been used by gtr's in the mid 300kw at the wheels mark.

[R31Nismoid]

340rwkw previous - 1.5 years.

365rwkw currently (1 month).

Nismo Coppermix normal here. I've done a silly amount of launches in the last 6 months, works fine and has no issues at all.

Now for the waffle...

It is SOOO much nicer than my OS Racing Twin that i have in the GTS-R having not driven it for 4 or so months... My god it's so hard to drive

Although that said after 15mins i was fine. But sometimes you don't realise just "how much better" some things are.

Only issue is they are not rebuildable like other clutches, although i believe someone is looking into that possiblity.

OS twin rebuild was i think 1400 vs over 2k for a Coppermix. IMO the extra is worth it for a street car

[Ziller]

Im using the standard clamp presure twinplate copper mix, the car is a dream to drive in traffic and has no problems pulling 355kws all day everyday.

This has to be the best money I have ever spent on the car.

[Brandon]

Looks like nobody's got the competition model. The other problem is Nismo doesnt offer warranty for the competition model even though its more expensive and supposed better (471kW for standard and 574 for competition on the datasheet).

Thanks for the feedback guys.

[N1GTR]

Normal BCNR33 super coppermix; 471kw/640hp, 950kg pressure, 2.08kg lighter than stock

C spec version; 574kw/780hp, 1150kg pressure, 2.08kg lighter than stock

[Brandon]

Normal BCNR33 super coppermix; 471kw/640hp, 950kg pressure, 2.08kg lighter than stock C spec version; 574kw/780hp, 1150kg pressure, 2.08kg lighter than stock

Thanks dude. I saw that in the datasheet but I'm more interested in the comfort comparison. The extra power capability is good to have but I wonder if its any harder than the standard clutch. And from the review, most people have the standard one anyway. A bit off the original topic, this is what I've posted on another topic. Any opinion on what to do?

I experience crunching from 3rd to 4th on high rev (e.g. 7000rpm). It does go in but you can hear the crunching noise. However, this only happens on load and never when I shift below 6000rpm. <BR><BR>Another problem which happened ages ago and only once was grinding noise when engaged in reverse gear after a drag day. A quick summary of what happened that day was 3x 6000-7000rpm launches and grinding starts. Drove the car nicely and after that day, the sound went away. Might be something loose from heat expansion? <BR><BR>I know its a million dollar question but if it was you, would you rebuild the gearbox or would you just try using redline? I am planning to change the clutch if that helps making the decision. Rebuild by my mechanic was quoted around 1.5k - 1.8k (everything included except for buying the clutch)

[N1GTR]

The C spec in my experience is pretty damn close to the same driving wise. Its not like there's the difference of another plate in there.

If the standard one will do for your power, just get that and save the $300.

Before a rebuild of the box, use redline and see if that fixes it. Well, its not a fix, more a band aid until you can be bothered bilding the box

[Nee-san]

They are a good clutch, but having driven a GT-R with one, I can honestly say I wasn't a fan.

Got back into my own car with OS twin plate .... heaven

[Piggaz]

I have the C spec in my car. 400RWKW, has been in the car for the last 6 years. Trackdays, hillclimbs and one DECA plus just flat out disrespect for the thing and it feels no different to the day I got it.

I have the Nismo slave on mine also. Some people swear black and blue that you cannot run the Nismo slave with these clutches..... I have and I wont be changing. Do it, you wont be disapointed!

[elrodeo666]

I've run both the Normal BCNR33 Super Coppermix; 471kw/640hp and now run the C spec and hardly any difference in pedal feel whatsoever.

Just ever so slight more stiffer pedal feel but you can hardly notice the difference. Both feel like the stock clutch very, very easy to drive.

[bodge]

l have had os giken and now a copper mix (car is making a over inflated 380rwkw), l would rather the os giken although it is a little heavier to use l find it had more feel and you could ride it more in traffic where the copper mix l find it is either on or off.

[R31Nismoid]

They are a good clutch, but having driven a GT-R with one, I can honestly say I wasn't a fan.

Got back into my own car with OS twin plate .... heaven

The OS is totally different though. Bites ridiculously hard and has play.

You can feel the coppermix actually giving a bit of "leeway" to the drivetrain even on savage changes, as in it just doesn't bite as hard which for anyone that uses the car moderately often i think is better. You can slip it much easier too where i found OS took a good 500rpm more in the 31 (25box).

Each to their own though. I'll never go back to my OS lol, in RWD it's a pain... with 4WD it'd be too much effort.

[Brandon]

I have the C spec in my car. 400RWKW, has been in the car for the last 6 years. Trackdays, hillclimbs and one DECA plus just flat out disrespect for the thing and it feels no different to the day I got it.

I have the Nismo slave on mine also. Some people swear black and blue that you cannot run the Nismo slave with these clutches..... I have and I wont be changing. Do it, you wont be disapointed!

Excellent.

I've run both the Normal BCNR33 Super Coppermix; 471kw/640hp and now run the C spec and hardly any difference in pedal feel whatsoever.

Just ever so slight more stiffer pedal feel but you can hardly notice the difference. Both feel like the stock clutch very, very easy to drive.

Just what I'm after.

l have had os giken and now a copper mix (car is making a over inflated 380rwkw), l would rather the os giken although it is a little heavier to use l find it had more feel and you could ride it more in traffic where the copper mix l find it is either on or off.

I thought its the other way round? Doesnt easy to drive means you can ride the thing?

Thanks guys. I've got the answer I need but I might pay that extra 300 and rebuild the box just to forget about the whole system in the future.

[KING87]

Got the Competition im my car 350KW daily drives like a dream very good and quiet compared the my old exedy twin carbon..

[Blitz]

Looks like nobody's got the competition model. The other problem is Nismo doesnt offer warranty for the competition model even though its more expensive and supposed better (471kW for standard and 574 for competition on the datasheet).

Thanks for the feedback guys.

I have the competition model..........................in its box in my cupboard waiting to go into my car

I used the normal version in my last R33 GTR and it was brilliant on the street, at the drags, whatever!

[Moodles2]

One thing that is bugging me, Exedy make the Nismo clutches correct?

Is the Exedy equivelent to the Coppermix just painted purple (Exedy) versus painted red (Nismo)?

[bodge]

Have you looked at Jim berry clutches. I remember reading a while back a VL turbo was using one of there clutches and did multiple 9 second passes and was still easy enough to use on the street. I wouldn't mind betting that it would be a cheaper option as well.

[Nee-san]

The OS is totally different though. Bites ridiculously hard and has play.

You can feel the coppermix actually giving a bit of "leeway" to the drivetrain even on savage changes, as in it just doesn't bite as hard which for anyone that uses the car moderately often i think is better. You can slip it much easier too where i found OS took a good 500rpm more in the 31 (25box).

Each to their own though. I'll never go back to my OS lol, in RWD it's a pain... with 4WD it'd be too much effort.

Fair comment,

the OS admittedly bites very very hard, that redline to 2nd gear snap where you can just hear the "thunk, chirp" sounds brutal.

but honestly I never had any issues even in bumper to bumper traffic, well maybe it was a bit jerky (the higher revs you talked about) but overall I really like my clutch and did not like the nismo at all !

it had a super high friction point eugh.

Also probably should be noted I have a Nismo master cylinder on mine (bigger one) so that makes it more comfortable on the foot, although I don;t really get the people who whinge about having a heavy clutch, unless of course you have a leg injury/sore foot etc.

[GTR_JOEY]

Had a coppermix single on my 300rwkw build and it was excellent, only probs i had with it was riding it a touch at high revs to save the drive line (didnt really like that) Though i did perform an 8 grand launch side steping the clutch and it gripped up sweet and went like a rocket

Now chosen to go the coppermix twin plate for my 400rwkw build, should be a strong and streetable clutch....Cant wait to get it on the street!