I have driven a car with these and I know of a couple of others on here that run these along with lightened flywheels and have no idleing problems...

[Edited by Mo - 11/5/2002 8:34:52 AM]

 

as above, what is the purpose of them, are they worth while and what other mods required when you use them?

Sorry for all the questions, just seen that alot of the Yanks use them!

For me it would just be the "Bling Bling" factor

NOT!!

Rice Rocket
MY01 WRX

 

As these components have less mass they usually allow the engine to gain revs faster.. If you go too far on the flywheel you can end up with 'lumpy' running at low speeds.. All IIRC

 

They are more popular on Yank V8 engines as they allow the engine to accelerate faster. The down side is you get less ineria which tends to make the engine feel more lumpy at tick over. On a small european engine there really isnt too much benefit unless you are go for a full-race set up when the idle qualities are not important

 

Cheers guys, thanks for the replys.

Alot of yanks use them on their Bug-eyed scoobs, just checking to see if a waste of money or not

Rice Rocket

 

JDM STI 7 Type RA 35000kms.
Just installed a Cusco Cromoly flywheel 2 weeks back. Weighed it at about 6kg+. The car is noticeably more lively off-boost in gears 1, 2 and 3. With boost, it is slightly faster, nothing spectacular.

However, IMHO the best part of a lightweight flywheel is the revvy-ness of the engine off-load. Throttle blips on the downshift are much faster, hence you are able to pop the lower gear in sooner.

There has been absolutely no change to the idle qualities of the engine, with or without aircon. I also am using the original clutch, which is still very progressive with this new flywheel. Slightly more revs are required when starting on a slope, but driving style for flat-land starts is hardly changed.

Cheers.

 

Hi,

I've got MRT lightened flywheel and lightened pulleys on my car.

The car is noticeably more responsive, no idle problems and it pulls hard right to the redline.

The only disadvantage I've come across is that on sudden liftoff of throttle, the rapid deceleration of the lightened parts can lead to a bit of jerkiness. But it's a small price to pay for the benefits. There's a dyno graph on MRT's website somewhere showing a car without them and the same car then fitted with them. It is driven at 60 and then the throttle opened. Response at the bottom end of the graph is much greater with the pulleys.

Cheers

Rich

 

Here's the graph:




Cheers

Rich