Has anyone found a light weight flywheel yet ? I have called Spec Clutch which produces a racing clutch for the car, but no flywheel...

 

A good shop in your area will be able to safely lighten your stock flywheel.

 

Perhaps only 10-15% by shaving / honing... A good aluminum FW will reduce rotating mass by 60%...

So back to my original question... Has anyone found an aftermarket lightweight flywheel for the Crossfire ?

 

I think you're in pretty rare company on this one. Not too many manual trannies are found behind the 112 motor.
Have you checked the tuners to see what they say? You may be able to get leads from those guys (Kleemann, Renntech, etc).

 

Yeah... They have no leads... Looks like another custom one-off for big bucks... As soon as I blow the engine in this car, I'm dropping a small block american V8 into it... Parts O' Plenty. PS: I have an extra SRT6 long block if anybody wants to buy it...

 

HDDP, If I remember from my "hot rod days" Lighter flywheel meant quicker revs, But less torque because of less reciprocating mass (to push the car?) Delicate balance there I would think, so maybe just a shave would do it for you.. My experience was from drag racing small block Chevy's and we would use heavier flywheels and leg breaking clutches to "Launch" the car out of the hole. I have a 6 speed 2004 crossfire and the best part of the drive is from about 3,500 rpms right up to stall approx 6,100 rpms. I must admit I think the engine would survive 6,500 rpms still feels strong up there.

PS - Happy New Year.
Carl

 

I was thinking about the same thing the first time I read this. He'll lose substantial low end torque.
However, he's not going to be lugging the engine down like that unless there's an off road excursion. Most of his time is spent in the sweet spot of the power band. I doubt that engine spends much time below 3,500 rpm.
Derek is one of the few folks that may actually benefit from the lightweight flywheel.

 

I'm looking at a lighter FW to help bring the revs up quicker when I come out of turns. Many of the tracks I run have turns that don't quite mesh with the gears in this car. Many of the tight turns require me to either carry through them in an over-rev situation or an under-rev situation. I usually choose the under-rev gear. The lighter FW would help me spin the engine up faster when I come out of a turn in those situations.

 

I hope you can make it work. I'd hate to see you drop in a different motor. The only lightweight and strong choice would be an LS1 but it would still mangle the balance of the car.
Perhaps you can do an aftermarket EFI system along with forced induction to get the power where you want it.

 

Well I still have that rebuilt AMG 3.2L long block sitting in the garage waiting for some extra $ to send it to "extrude hone" for porting and polishing and the Schrick cams. I'm sure I can squeeze an extra few hp out of that thing and still run it naturally aspirated on my current ECU

 

any chance there is enough material on a stock clutch that will allow you to machine material off without effecting the usable surface area where the clutch contacts?

 

I'm not running a stock clutch. I replaced mine with a race clutch from "Spec Clutches". I might just have to see if I can have the OEM flywheel machined to lighten it. This will be much cheaper than have a custom flywheel built.

 

The amount of material you could skim off the flywheel would result in a minimal weight loss.
The aluminum flywheel would be MUCH lighter.

 

my mistake, i meant to say remove material from the flywheel not the clutch. i have seen flywheels that have a series of ovals machined out from the outer circumference of the wheel nearest the gear teeth, that should take off at least a pound or two if it's physically possible to actually do.

 

here are some ideas as to how you should gouge out metal to lighten that sucker. careful as to how the stress will effect the wheel during high speeds, you might be smart to have it x-rayed for flaws. i've heard stories of people who used stock flywheels and had them come apart, not a fun thing to have happened during a race because you could get your leg cut off or seriously damaged.

 

A couple of those are good ideas... The last photo looks a bit overboard...

 

Overboard? It looks like a grenade to me.
Wanna pull the pin?

 

Not in my car... Bell housings and clutches are expensive...