I did some searching here and didn't find much on the subject.......

the lightweight crank pulley mod is so much fun i want to do that again by going with a light weight flywheel

has anyone here install a lightweight flywheel in an AT? I found a lightweight and ultra lightweight JUN flywheel at SGP Racing.......would the ultra be too light?

the lightweight is offerred at SGP Racing for $425.....good deal?

should i do the roller bearing pilot bushing at the same time for an additional $20?

i want to do the job myself if possible......anyone changed the flywheel themselves? DIY

 

Does the lightweight flywheels offered by companies like Nismo, JWT, Tilton, etc. even work for the ATs? Are the stock flywheels on the ATs the same as the stock MT flywheels?

 

Shooter,
Unfortunately you haven't got a 'flywheel' in your 'automatic transmission' to replace.

 

Clint, I believe the automatics have something called a driveplate instead of a flywheel correct? The driveplates function is similar to that of a flywheel I believe.

 

........

 

That lightweight flywheel will certainly counteract all the extra weight from your stereo and dynamat.

 

He has an automatic. The automatics don't have flywheels.

 

Thank you Capt. Obvious. I was trying to make a point about why he was bothering to get one (even if he could) because of all the other extra weight in his car.

 

Regardless of weight the lighter flywheel reduces drivetrain loss, weight loss is only half the benefit of a lighter flywheel. response would be greater depending on which flywheel he chose to go with (if the option was available to him)

 

my mistake on the flywheel.....but there is a plate in the AT that performs the same job?.....doesnt the starter teeth mesh with this plate?

 

Its called a flex plate. It is a balanced part but you should not play with this
for a lighter setup.

 

First part of the question has already been answered by Gee Pasta. Don't mess with the AT FP. You may f00bar your tq conv/tranny.

I swapped the flywheel/clutch in my Z with the JWT setup. Definitely a fun and worthy mod. Always change out the pilot bushing and release bearing when swapping new clutch. Paying someone for the install will kill though. I can come up with a moderate DIY if anyone's curious. However, 1) No pictures 2) Based on Z 6MT.

 

Hey guys

You need to understand that a flywheel stores energy. Whenever you lighting flywheel mass you start to loose Drivability. Owe cars are on the heavy side. On a road course all that light stuff will help some out of the corners. On a drag strip You will loose the race.
Its like what has more power when you get hit in the head with a hammer. A light one or the the heavy one. Just think before you buy parts

 

thanks guys for the education .....reducing the rotational mass (crank pulley) was the best mod so far (for increase in torque) for very little money......wheels are so expensive that it will a long time before that happens......

i am having too much fun modding this car!

 

Installing a lightened flywheel will in fact make your car faster at the drag strip. Engines have to accelerate the mass of the car, as well as the mass of all rotational items, such as wheels, gears in the tranny, crankshaft, and accessories. However, lightening rotational drivetrain components (like a flywheel) have a more pronouced effect on make a car faster than just reducing mass of the body of the car, because the engine doesn't have a mechanical advantage to drive a flywheel, it is a direct connection. The transmission of a car is like a lever helping the engine accelerate the mass of the car. So, a 5lb savings on a flywheel could be equivalent to taking 50lbs out of the trunk.

Driveablility will suffer. When shifting, a heavy flywheel will keep the engine reved up to make the engagments smoother. Some race cars with no flywheel will drop to idle during shifts, the driver has to tap the throttle to keep the engine up in revs for a clean engagement.

Golden rule .....Force = Mass x Acceleration, to increase acceleration you have to either increase force (more hp) or decrease mass. Same applies whether you are talking linear acceleration or rotational acceleration.