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Discussion Starter #1
Do any of the ones available NOT void our warranty?
Any reviews from members who have installed this combo?
What company JWT NISMO...etc? Gains?

Thanks in advance

TOM :shiftdrive:
 

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Originally posted by EnthuZiast@Oct 22 2004, 12:15 AM
Do any of the ones available NOT void our warranty?
Any reviews from members who have installed this combo?
What company JWT NISMO...etc?  Gains?

Thanks in advance

TOM :shiftdrive:

a clutch and flywheel is considered wear and tear parts. therefore they are NOT covered under warranty. So i dont see how any of them would void warranty.
 

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Discussion Starter #3
My problem is I go through trannys like underwear so Im afraid that if I make the upgrade that the next time my tranny fails that the dealer (who always replaces my clutch with the new tranny) will notice the changes and try to blame the mods.

If they dont care which ones do you recommend? I was thinking NISMO clutch and JWT lightweight flywheel!
 

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Originally posted by EnthuZiast@Oct 22 2004, 01:16 AM
My problem is I go through trannys like underwear so Im afraid that if I make the upgrade that the next time my tranny fails that the dealer (who always replaces my clutch with the new tranny) will notice the changes and try to blame the mods.

If they dont care which ones do you recommend? I was thinking NISMO clutch and JWT lightweight flywheel!

I was in the same position as you a few weeks ago. I was going in for a 2nd replacement tranny, and I asked my dealer if putting in a clutch/fw would void my tranny warranty. After some talking, they said only if the clutch/fw combo is found at fault of a future problem, so I said ok, and bought a JWT clutch/FW. Well when I finally take the car in, they give me the run around saying that the area rep came by and said that if I put my aftermarket clutch/fw in, they would not honor any more tranny's...technically this is illegal, because they have to prove beyond a reasonable doubt that you rmods caused a failure to deny a warranty, but at this point I hadnt had 5th gear for 2 months, and my car got stuck in gear so I didnt have time to argue with them. I got my 2nd replacement and they gave me a new friction disk-so the clutch grabs hard. Basically, if you can find a mod friendly dealer to honor a warranty with an aftermarket part, have them put it in writing. Sorry for the long rant...HTH
 

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If you go with the nismo clutch and flywheel, you should have better luck with warranty issues. There are a few good dealers out there that will honor the warranty no matter what , you are just going to have to ask. I have been told that a properly installed aftermarket clutch and flywheel will lessen the chance of the tranny having it's gear problems. Also, the JWT/Nismo combo is said to be the lightest combo with the most in ease of driving. Hope that helps.
 

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With a lighter flywheel and clutch, there will be less power lost at the wheels. Basically, the lighter the flywheel, the less power required to move it
 

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The biggest benefit of a lightened fly+clutch combo is the more ready ability to speed match both up and more so upon downshifting.

For example with the heavy OEM fly, It is quite easy to overstress the 2nd or 3rd gear syncho upon a rapid upshift since the OEM fly takes more time to spin down , thus requireing the synchro to work harder when shifting rapidly.

Upon downshifting , a lighter fly allows a very quick throttle blip before pushing into the lower gear (again less stress on that synchro).

Most of the tranny failures have been synchro related not gear related. Faster shifting more often , especially with the heavy OEM fly will place more stress on the crappy synchros. IMO
 

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My Tilton is only 16 pounds total. The stock clutch/flywheel is like 54 pounds I think. Plus, my tilton clutch is only 7.25" compared to the stock 12". Once I get going from a stop, The car pulls like I have a turbo. I can shift as fast as I want and the car does great. The problem is that the lighter you go, the more noise your tranny will make at idle and low RPMs and the harder the car will be to drive. The tilton is the MOST EXTREME, and the Nismo/Nismo combo is probably the least extreme.Just a matter of what you want.
 

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Lightening up the clutch and flywheel will allow the engine to rev faster. Since your transmission gear ratios remain the same (they determine what speed you'll be traveling at certain rpm), you'll reach faster speeds in a shorter amount of time--better accleration.
 

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Discussion Starter #11
Thanks for all the good input!
I think I will go JWT flywheel and Nismo Clutch!

Will this be a big chance in ease of driving?
What do you think this would do to my 0-60 time? 1/4 mile?
I know the Tilton is a BIG change in drive. Also heard it hurts MPG and stresses the engine more at highway speeds??

thanks

Tom :thumbsup:
 

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The tilton doesn't hurt the tranny at freeway speeds. Why would it? If you plan on staying NA then you could go with the Tilton "street" clutch. It's said to be alot easier to drive than mine. The Jwt/Nismo combo is said to be nice. The car should drive like stock but with a little improved throttle response and faster acceleration. Most people say it's not a BIG performance gain, but a very nice one. My tilton free's up about 20hp. Not from the top end but on acceleration.
 

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Discussion Starter #13
Ive heard that at high speeds teh engine has to revv more to accelerate therefor using more gas.
I want VERY noticeable gains with good riveability...is that unrealistic is this case?

What would a JWT/NISMO combo do to the Zs 0-60?
 

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I don't see how the engine would have to use more gas to acclerate, if anything, it should be less. The flywheel and clutch has less rotational mass and less inertia (less weight and smaller diameter) so easier to spin. The engine would have create more torque to spin a heavier flywheel to reach the same speeds as a lighter one...I.e. giving stock flywheel 100% throttle might equal same accleration as Tilton with 90% throttle.
 

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With my Tilton being so light, The throttle is VERY sensitive. The engine does not rev any higher or more than stock. At freeway speeds, I am at the same RPM I would have been on the stock flywheel. My engine now only has to spin 16 pounds instead of 54 pounds. From what I have read, The JWT/Nismo combo is one of the lightest of the easy to drive combos. It is still a 12 inch combo and weighs about half of the stock set-up. Since it is a 12 inch combo, I would think you would free up 5-10 hp in the drivetrain. THe tilton frees up 20 because of it's super light weight and it's 7.25 inch diameter. THe carbon twin disk tilton frees up 30 hp. THe more gains you want, the more drivability you will have to sacrifice. Let's say a stock clutch/flywheel has 100% slip (when you let off the clutch and the clutch starts to grab but slips until you let off the clutch more), The jwt/nismo combo would be like 90-95% slip. The Tilton I have is like 5% and the tilton street is like 25% and the carbon tilton is like 30%. So when I let off the clutch, the clutch grabs super hard and will stall VERY easily.
 

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Discussion Starter #16
nismokid.
People have said:

"if the flywheel doesnt hold as much inertia, then it will slow down faster... when you are crusing on the freeway at say 70mph in 6th gear... you are appling some throttle and the flywheel keeps momentum going... if that flywheel will not keep the same momentum you have to apply more throttle therefor using more gas..."
 

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I have noticed NO change in my MPG. Just a lot of performance.
 

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Originally posted by EnthuZiast@Oct 23 2004, 04:59 PM
nismokid.
People have said:

"if the flywheel doesnt hold as much inertia, then it will slow down faster... when you are crusing on the freeway at say 70mph in 6th gear... you are appling some throttle and the flywheel keeps momentum going... if that flywheel will not keep the same momentum you have to apply more throttle therefor using more gas..."

As long as throttle is kept constant, there will be no difference in mpg noticed between the two setups. There are situations in which the Tilton is better for fuel economy and another in which stock is better.

The Tilton is good for fuel economy under accleration (especially at higher speeds since it takes long to acclerate) since it revs faster (gets to higer rpms faster and rpms are directly related to speed of the car). If you have the stock flywheel and floor it, it will take longer (and more fuel) to get to the same speed.

If you're for some reason getting off and on the gas frequently (maybe in traffic), then stock setup would be more fuel efficient. It would be more fuel efficient for the reasons you said--more inertia. It wants to stay at the same rpms and is harder to lose rpms than the Tilton setup. For the Tilton, you'd have to give it more gas to get back up to speed (the Tilton is good in engine braking, though).

So really, if you have an equal amount of traffic and accleration and the advantages of both are equal (i.e. 50% more fuel efficient with stock setup in traffic and 50% more fuel efficient under acceleration with Tilton [these numbers are made up]) then you won't notice a mpg difference.

IMO, I don't think you'd notice a difference at all unless you had a controlled experiment with every variable (temp, humidity, atm pressure, etc) exactly the same with both setups. The only reason why I'd want the Tilton is for the accleration improvement.
 

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Discussion Starter #19
THANKS!
so NismoKid do you think i will be wasting time/money on the JWT/Nismo combo. Should I go Tilton Street?
 

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If you're still wondering why the two mpg would be same at the same speed, let me further explain. MPG is a relationship between fuel usage by the engine and distance traveled. Fuel usage by the engine is determined by RPMs of the engine (higher RPMs require more fue). RPMs of the engine (along with the gear ratio for the gear you're in) determine the speed of the car. If two Zs, one stock and one with Tilton, are at the same speed, therefore same RPM, both with have same MPG if everything else is the same between the two. Inertia ONLY makes a difference under acceleration and decceleration.
 
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