What combo is good with 9 pound Flywheel?

[red_dog007]

I read the "launching" out of neutral can be harse but what causes that?

From what I know that is auto only. Rev like crazy in neutral and when you are ready to go, drop the stick into drive. Doing manual shift in a traditional auto isn't good for the tranny in general.

Though what I heard that you can do in a manual is skip 1st all together in a launch which is supposed to give you better launches but is bad for the transmission. There is a technique to it that I am not sure of how it works.

But for what I have heard, light wheels are for autocross, heavy ones for drag racing so that they don't brake. I would just go with the standard wheel. Maybe 1lb lighter or so, but nothing major. If its a daily driver anything heavy or lighter may not be very fun.

[WingZr0]

That makes.

I'm diffently dragin this thing so last thing I need is a brooken flywheel !

What be stock Flywheel wieght BTW?

The Nakamura one is the lightest I've seen at 7.245 pounds and I have to think Nismo don't make 'em that light.

[d240zx2]

If I'm not mistaken, my '70 flywheel weighs about 13 pounds.

I replaced the clutch in August and had the flywheel resurfaced. The loss of roughly a pound of metal did have an effect on driveability in the sense that the shifts need to be completed more quickly to maintain smoothness than with the heavier, un-resurfaced unit.

Frank

[sblake01]

A stock flywheel weighs 23-24 lbs depending on the source. Even the Y70 810/Maxima flywheel weighs 17.6 lbs. I weighed mine so I know that for a fact. 13 lbs sounds like the Centerforce. Is that what you have? And to answer WinZro's question, a 7.245 lb flywheel would be tough to get going from a dead stop in normal traffic. It just wouldn't generate enough inertia and you have to really bring the rpm up to get it underway.

[240ZGL]

For street driving, your just going to burn up clutch discs, especially on a up hill start. It's great if you want to leave hard like a race car but remember that race cars get taken apart at the end of the day. Race cars just don't make good street cars and visa versa. I wouldn't go beyond 16lbs. Thats about the limit for a street car. A 9lb. disc will spin so easy that it's going to be tough to control your revs from a dead start. You'll get tired of it real fast and then swap to a heavier disc.

[carrott]

Standard car Standard clutch and flywheel, the heavier flywheel has more weight giving more inertia which is what you want in traffic, ie a light flywheel will require some more RPM to move off the line and hence a little slipping of the clutch, that is unless you put in a lower ratio diff.

[d240zx2]

Stephen, re #16. You are probably correct in the flywheel weight. It's been 60 days since I hefted mine and never did weigh it. It didn't feel that heavy to me at the time, but maybe I was feeling extra good that morning.

Frank

[Cethern]

When I was planning my auto to a 5sp swap I was going to put in a 10.5lbs flywheel and a ACT clutch set up and one day I will but I wanted to get the manual in the car while there were a few races left in the season.

So I took my 23lbs stock flywheel to a shop to lighten it and balance it, it's now down to 15lbs I used a stock clutch as well.

When the 5sp went in I changed the rearend to a 3:90 from the stock 3.54. The over all feel of the car is great she is quick to come up on the RPM's. I can feel the difference from my 76 which is just a stocker....for now:classic: