Ok i want to have a stock flywheel lightened
has any done this
how light have been able to take it and do you have the material removed from the front or just the lip on the back side

 

Why not just buy the fidanza unit for $500? Its only like 5 lbs? And you can be guaranteed it will hold up.

Removing the material from you stock flywheel can surverly weaken it. I would not shave more then 1/4th off, if that.

 

The best advice I can tell you is to research Machinists in your area that have done this sort of thing before. They will be the best source in determining the weak points in your flywheel.

 

I would not do it. Too many horror stories.

 

The only horror stories I have ever heard involve those who lighted their flywheels and have boost. I would recomend that you use a new flywheel if you can. This will reduce your risk of weakening an already compromised piece of metal.
Flywheels are resurfaced for new clutches all the time. I know that lighting it is different comletely but it is realatively safe based on who is doing the work. It is also better to be conservative on how much you remove. Even a small amount of weight will be noticable because of the rotational mass principal.
I beleive that Random did some calculations at some time on how much it effected your performance (in a positive way) when you lightened the flywheel. In some of the lower gears it was as though you remove 300 lbs of weight from the car. It will dramaticaly improve your off the line acceleration.

 

MR pc.... my engine goes out this weekend

You will be able to see the fidanza unit and a stock unit.... SIDE BY SIDE

Talk to random
If you dont bring your car, you cant come
sorry


The fidanza unit only works on the second gen BetaI engines... to use it with the pre 99 models, you will need to get some kind of spacer

But if you wanna check out the differences between flywheels, stop by wink

[ August 30, 2002, 09:06 AM: Message edited by: JAWS 021 ]

 

After doing some quick checking you will also want to insure that whomever does the work will also balance the flywheel after completion. If you do use your existing flywheel (or any used one) make sure that they go ahead and resurface it at the same time.
For added cost savings if your going to pull the flywheel then a new clutch is a good thing as well. You'll have already gone througth effort or expense of cracking your transmission anyway.

[ August 30, 2002, 08:43 AM: Message edited by: DESIGN ]

 

The fidanza unit is 7.5lbs (Aluminum)
The RPW unit is 11.5 lbs (High Carbon Steel)

The stocker is???? (I'm assuming plain steel)

I'll have some photos and weights of the stock unit after this weekend. If memory serves me correct, the stock flywheel is 16lbs.

Lightening a flywheel is a DICEY thing. If done wrong, you can greneade the flywheel and take the clutch, pressureplate and tranny with it. If done right, it should be fairly reliable for under 200 WHP. I would really worry about it OVER 200 HP. For the cost...when you think about how much a new or used tranny would be, plus a clutch/pressureplate, plus the major PITA of having to remove the broken parts and install new parts. The $450-$500 for the fidanza is a good value. The RPW unit is cheaper yet, but also heavier, but the high carbon steel should hold up to whatever abuse you try to give it.

 

sorry jaws as much as i would like a 10 hour is out of the question right now

the stock flywheel is 20LBS. as i have wieghed it
and i am taking it to be resurfaced today
it got 10,000 mile on it its out of a 99 elantra
can still see all surfacing marks from when it was new

now if you look at the back of a stocker there is
a large ring lip that i thought if removed and then balanced would not affect it but i may be wrong

i will post pic when i get home from work

and money is real tight rite now as trans swap cost and other projects going on buying a 500 alum flywheel is a no go but maybe later if i have to.

 

I'm familar with that lip you are refering to. Neither the RPW or the Fidanza unit have it.

You SHOULD be able to have it machined off, but I don't think it will significantly reduce the weight of the unit. Maybe 2 lbs at best.

I'm wondering if the Elantra has a heavier flywheel than the Tiburon. I remember seeing that someone else weighed one and it was 16 lbs, but that was a tibby unit. Oh well, We'll know by Monday.....