Is this true? Some mechanic told me that this might ruin the engine(because something will turn too fast or something...forgot exactly what he said). I was thinking, if this is ok, then I will try to save $$$ and have them installed at the same time.
Thanks
Charlie

That mechanic is an idiot, not to mention totally wrong in this situation.

exactly neal. there is no way that it could damage anything at all, unless something was installed wrong, and even then i don't think it would be engine damage. please don't give that mechanic any business as it sounds like he has had his head in some hole somwhere when simple car physics was taught.

Not exactly true. The lightweight flywheel and greater clutch clamping force CAN cause more wear on the engine and transmission due to quicker, more sudden rpm changes...quick changes in rpm mean greater rotational acceleration/deceleration which means larger instantaneous forces, which means more possibility of brekaing something. However, if you drive your car as like you should, ie no abusive, abrupt power shifts, etc, no those modifications shouldn't harm your drivetrain in the long run. You would have to have pretty decent power adders on the engine (100+ shot nitrous, etc) and drive the car really hard to cause significant damage.

FYI the primary reason Nissan chose a weakish clutch and heavy flywheel is to make clutch pedal engagement easier and make the engine less prone to stalling coming off the line. That's pretty much it.

I have the ACT clutch and the Fidenza alloy flywheel. No problems with driving it everyday, saves plenty of gas and instead of tearing **** up it will prolong your engines life. The honda boys swear by the alloy flywheel you dont see their engines get torn up do you? do the mod while hes in there you wont regret it.

I did the same asked for opinions, in all I am hard headed I didnt listen. I went about doing what I was determined to do, once I did it test it out myself and see the results, I stop and say to myself, lots of these mfu*ckers are full of ****. Another reason the average joe doesnt upgrade to the alloy flywheel because the labor is not as easy as changinga a tire and it also costs over $275 to get it installed etc..

i question what the need for a lightened flywheel is. the act grips really tight. with more rotational mass, the clutch can be slipped easier with less jerkiness. with less mass, the clutch might grab quicker and make a tough drive. with my stock resurfaced flywheel, i wouldnt want any tougher starts, the act is grippy enough already. but, obviously jay25 is happy with has, so what do i know?

Thanks all for your input.
Charlie

The Fidanza for the 4-gens is about 11 lbs or so. It's not the ULTRA light units that the others guys sell(something like 5-6lbs?). Even so, this unit is MUCH lighter than a stock flywheel. But it doesn't seem to affect the drivability(to a big degree). Sure you don't get something for nothing. But this seems to be the perfect compromise. At 5-6lbs, I would really wonder if that was too light.

If you have a SCer is a heck of a great mod to ans your first question. One of my friends Ramius is getting one, and he can attest to what he thinks. Like Jeff said the unit is much lighter then the stock by a couple of lbs. Its a good mod in my opinion. If it was not a good mod I doubt he would be even selling them.

Yeah i love my flywheel which is the fidanza by the way. Also i am just getting ready to change from a centerforce clutch to ACT. Ill tell you what i think this weekend.