Hi Guys,

Just to refresh your memory.. I upgraded my motor with forged internals and added carbonetics twin. Please see following link for build details:

https://my350z.com/forum/new-owners/274462-my-twin-turbo-veilside-350z.html

I have only done 400km on new build and noticed the following:
- Clutch makes a loud noise, especially when Idle. It has a loud rattle/noise. When going through gears the car makes a whining noise until 5th gear then it disappears. I dont mind this just that rattling sound when Idle. When car gets hotter then the noise becomes louder. Will this noise disappear after 1000 miles or will i have to live with this? What can I do to make it a bit more quieter?
- I get some smoke from left exhaust. Not heavy but noticable. Is this normal on new build?
- After 1000 miles the car will go to dyno for tuning. I would like to do 460whp for now. Will go higher after driven the car for another 2000miles and upgrade the ECU and Fuel System. What is the PSI I should boost to get this power with my current build bearing in mind that I still have the Unichip and 440cc injectors?
- What do you guys think of the Autronic Management System? hear it is better than VPro.
- What else would I need to get 650whp?This will be attempted when I receive my other parts next month.

Otherwise car feels slower than when it had stock internals. Once it is tuned I should feel much more power.

Cheers

 

Rattling noise is normal with a multi-plate clutch. Regarding the smoke, this is normal on the APS TT kit when the oil level is over-filled. Make sure that the oil level never goes past the LOW or ADD mark on your dipstick. You'll add no more than 5 1/2 qts with filter with the APS kit.

 

Thanks, any feedback on the rest of the questions?

 

Wait I thought the carbonetics twin clutches are not too loud....

 

They are fairly quiet.And never make a whining sound...

 

The only ATS Carbonetic twin disk I have experience with on a Z made a bit of noise, enough that a layperson would believe there was something wrong with the car I'd say "hey, what's that rattling noise?". No whining though. Can you describe the whining more? Does the pitch change with engine speed, vehicle speed, or neither? Does it go away immediately when you shift into 5th gear?

You should be able to make 460ish whp on 10ish psi keeping in mind that different dynos read differently, tuners tune to different levels of aggressiveness, etc.

I've heard good things about autronic. If your tuner is more experienced with autronic and feels he can get it installed without a bunch of hassle I don't see a reason not to go with it.

 

**** .. what could it be.. It goes away only in fifth gear. It is now even worst.. I only put 500km on clutch... and the noise is getting worst. Help!!

 

Transmission maybe?

 

My original transmission was whirring quite loudly after 3k miles and had to be replaced.

 

I just replaced the clutch so what else could it be. It sounds like a metal sound coming from transmission. Could it be a bad install. Do you think my Clutch is stuffed so soon.. 500km. I am cautious when I drive and do not ride on clutch.

 

Any lightenweight flywheel will make some noise at idle, and more noise under load at low RPM. Multi disc carbons make a little more noisey, but none of our customers have every complained that is terribly loud. It's hard to diagnose a sound over the internet, but if you are hearing a little rattle at idle, and the cement mixer vibration noise under load at low RPM, I would say that is normal. After driving the car for a week or so, you will quickly not notice the noise anymore. If you are hearing a constant whining at cruise...no load...then something else is wrong with your car. Could be your diff, or your trans.

With respect to the smoke, I would keep in eye on it, and see if its still an issue after 1000 miles. Do a comp/leakdown if you want to put your mind at ease. If its not the engine, it has to be the turbo.

With the Unichip and 440cc injectors, I would stop at about 8-9psi, and about 400-450whp tops. Best of luck.


The Autronic is an excellent EMS. I dont know if i would consider it "better" than the VPro. But if you have a good Autronic installer/tuner...then go for. The car should run superbly with the Autronic. The Autronic is a slimmed down version of the Motec. Both run on VE tables + Map Comp, instead of pulse width tables, which creates terrific consistency and smoothless. I think you will like it.

 

Hi Sharif,

Thanks for you valuable input.
The car definately sounds bad. Especially on load but not on cruise. It's actually embarrassing driving the car. I am actually goona take it back to tuner. I was suppose to break-in the engine and clutch this weekend but I rather wont drive it. I will let my tuner do that.
What could it be if it is the transmission or diff. What is the price of aftermarket or OEM. What would you recommend. If it is any of the 2 .. do u think my clutch would still be OK?

 

Well, the twin disc is louder than the triple disc, ironically. We run a twin disc on one of our customer's NA track cars, and its definately noisier. Personally, i wouldnt change out the clutch, just becusae of noise. Just tell your friends its a race car now!

The triple Carbonetics isnt very loud at all. Since its not making any noise at cruise, I think your trans is fine, and you are just getting uses to the noise of twin disc carbon.

 

+1 Most Bad AS$ cars are very noisey. lol Mine is

 

Thanks Sharif,

Just another thing to add. When I release the clutch it makes a metal-like sound. It is not a grinding of gearbox sound.. but a loud, painful sound. We are still using the OEM oil.. should I change it. We do not have Motul or Redline in South Africa. Can I use Royal Purple or what other brand. See link below. Is this fine:

http://www.autostyle.co.za/prodview....brandstr=&str=

Regards
Noer

 

Why is triple disc quieter than the twin disc?? Is it because it's heavier?

 

I've been running a triple disc for the last few days. So far it isn't too loud. Mine actually is perfectly silent when the clutch is engaged, and when I push in the pedal it makes the olde rattling cement mixer noise. This is exactly opposite of what I experienced on my JWT setup.

Overall it's been interesting getting used to the high engagement point and the really grabby nature of it.

 

Any other advice??

 

We carry Motul. You can go to our online store and we can ship it to you, if you'd like

 

Thanks for the suggestion. I however need something this week. I would love Motul but unfortunately I can only go for Royal Purple. Is the Sycromax anygood?
Also, have you guys figured out why the APS Twin Turbo kit have smoking issues. Is there a fix for the problem. My turbo seals are fine but I still get some smoke.

Regards