Not sure what is going on with my z, I have an 06 with nismo 6spd and nismo 1.5 way lsd.
Car jumps revs like its slipping the clutch in 5th and 6th if I put my foot in it, but takes off like a rocket 1st through 4th. I'm thinking that its the clutch/ flywheel but it may be the diff.
Anyone else have this issue or have an opinion about what it could be.

Car is supposed to have a jwt clutch flywheel combo, 548rwhp is what I'm told she dynoed at.

 

slipping revs in 5th and 6th yet holding 1st through 4th seems counter-intuitive of clutch slippage. I'm hardly an expert in either transmissions nor FDs, but I would venture to say your FD is your culprit...

 

I'm planning on building the car even more but need to replace the problem part to keep it driving till then.
Gonna check the fluids in the rear, but I swear I smell a faint burning clutch smell afterwards.

 

It's the clutch , and JWT is not very good for much over 500hp.

 

What would you recomend? I'm looking at the z1 performance clutch, the south bend stage 3 and spec stage 3+

 

OS Giken

 

Definitely clutch. You have to look at it from load standpoint. Higher gear means higher load towards the engine at same speed. What's between your transmission/rear end and engine? Clutch/flywheel.

That being said, I'd wait a bit longer for that clutch. You really shouldn't be "getting on it" under 3k rpm, especially in 5 or 6th.

You can, but that's how you break sh**, beyond just the clutch. If you have rpm to reach 7k, no reason to at all, unless maybe in 1st. Even then I don't.

Shifting up till 5th or 6th while going for it is a different story, but if you're just flooring it in those gears you're putting a ton of load on the engine for no fawking reason. It's hard on the tranny, clutch, rods, increases probability for knock...

 

http://www.enjukuracing.com/products...g35-03-07.html

I think I'm going with this, I know its not os giken.

 

have you considered southbend?

 

Yes I have, I was looking at their stage 3 clutch flywheel combo. Do you have a link for a good price?

 

check here

http://zspeedperformance.com/South-B...VQ35DE_c95.htm

 

The stage 3.5 seems promising.

 

the ones at the top dont include the flywheel..... dont forget that.

unless you were talking this one

http://zspeedperformance.com/South-B...RANCE-35-S.htm

 

Car already has the other upgrades, I just need the clutch and flywheel. How hard is a clutch change in a z? I've done them in civics, mustangs, f150s and a corvette. I really don't want to have to yank the motor out for a clutch.

 

it is pretty straight forward, there is like 12 bolts i think. me and a buddy swap them all the time just me and him and a floor jack.

 

Good to hear, gotta pick between the twin plate or the stage 3.5 and I'm also ordering a solid trans mount.

 

get ready for alot more cabin noise

 

Twin plates are going to be more streetable compared to an equally matched single plate

I'd vote for a spec super twin they're around 1k and serviceable.

Although an RJM bracket and a single puck seems to be great too

 

Clutch is least of my worries now, had an oil cooler line burst and it go to no oil pressure, got a chatter sound, noticed the presure was 0 pulled it into a parking lot immediately and shut it down. Fixed the line but the an fitting is jacked up thanks to my friend cross threading it, but there's some metal shavings in the oil. So new clutch and motor most likely.

 

At least stock vq's aren't that expensive now a days. Might be able to find a shortblock, or just rebuild yours as well. Really is a pitty you can't use DE heads on an HR block, that would be great.