Should I get a lightened flywheel....

[90blacktsiawd]

I have the ACT Xact. I went with it because i was doing my clutch and i got a good price on an act 2600, Xact flywheel, SS clutch line and some BG syncroshift. I immediately noticed how freely the car seemed to rev. I never really launched on the stock clutch and flywheel so i can't tell you if there was an improvement there. I did however notice that when you let off the gas you slow down alot faster. I like due to the simple fact that i dont really need to use the brakes to slow myself down.

Now i couldnt justify getting the Fidanza at the time. The best i ended up finding for the same parts just a fidanza flywheel was 100 bux more. I didn't really know if the extra 3 lbs. less would be worth it as i was already dropping what 7-8 lbs off the flywheel.

 

[GPTourer]

I have a XACT flywheel and I didn't really care too much for it. I spend most of my time on the street and granted I was having some idle issues with my car at the time, the flywheel made things that much more tricky. It revved better, but it made uphill street launches with the A/C on tedious. I'm in the middle of a major overhaul now, but I think I'll just go with the stocker this time around.

 

[90blacktsiawd]

It revved better, but it made uphill street launches with the A/C on tedious. I'm in the middle of a major overhaul now, but I think I'll just go with the stocker this time around.

Why exactically were you launching with the AC on? Your not really supposed to have the ac on. You could potentially damage the ac compressor by revving it up that high with it on.

And you mentioned about idle problems. I have a bit of an idle surge problem when it's really cold out. I have to say it can be very difficult to try to roll through a parking lot while it's still surging. The car leaps then drops. It can actually get kinda violent.

And while i haven't read about anybody else having problems with creeping slowly in a parking lot. I have had alittle trouble sometimes when creeping in traffic or a parking lot sometimes. It's usually my fault though. You more have to roll onto the throttle with the lighter flywheel. If you just hit the gas too quick it'll leap forward and again if you let off too quick from that the front end will drop down real quick.

I also noticed alittle more throttle response from switching to the lighter weight. Which is always a nice thing to have.

 

[damentor]

And while i haven't read about anybody else having problems with creeping slowly in a parking lot. I have had alittle trouble sometimes when creeping in traffic or a parking lot sometimes. It's usually my fault though. You more have to roll onto the throttle with the lighter flywheel. If you just hit the gas too quick it'll leap forward and again if you let off too quick from that the front end will drop down real quick.

I also noticed alittle more throttle response from switching to the lighter weight. Which is always a nice thing to have.

Sounds like the same thing mine does at really slow creep. I have a fidanza flywheel but I manage it doesn't really bother me I just don't creep along often

 

[D_Eclipse9916]

Sounds like the same thing mine does at really slow creep. I have a fidanza flywheel but I manage it doesn't really bother me I just don't creep along often

The Xact is chromoly as I beleive the Fidanza is aluminum. What happens with heavier cluthces it can literally bend it to a point where your creating heat points on the flywheel. This is what destroys a lot of flyhweels. Chromoly is much stronger than an aluminum and will not bend as easily and create "hot spots". Therefore I will suggest the act chromoly wheel everyday over an aluminum flywheel.

PS- I run a SBR 3500 clutch with chromoly flyhweel. It revs nicely and is perfect, revs rise so fast. I also dont have a problem with it at all in terms of street driving. I daily drive this car to work and dont have a problem. (with the flywheel at least...damn dsms..)

 

[Dream On]

As to who asked how to check the flywheel for the correct step height, just take some calipers or take it to a shop and measure the distance between the clutch mounting surface and the friction surface. RRE has a better explanation with pics.
http://www.roadraceengineering.com/clutchandflywheeltech.htm

 

[GPTourer]

Why exactically were you launching with the AC on? Your not really supposed to have the ac on. You could potentially damage the ac compressor by revving it up that high with it on.

Sorry, launch was a poor choice for a word. I meant just starting to roll, just a regular casual leave from a stoplight was made more difficult with the flywheel. My idle issues stemmed from cams, and maybe either my alternator or my fuel pump was going bad, I don't know.

I had the violent idle surge problem with my 1g too, so I know what you are going through. The last thing for me to try was the coolant temp sensor as I had already done the ISC and ECU which made things better, but didn't totally get rid of it. But then I sold the car so I never found out if that sensor would have solved everything. Good luck.

 

[90blacktsiawd]

Sorry, launch was a poor choice for a word. I meant just starting to roll, just a regular casual leave from a stoplight was made more difficult with the flywheel. My idle issues stemmed from cams, and maybe either my alternator or my fuel pump was going bad, I don't know.

Good to know your not "launching" I can't speak from personnal experience about damaging the ac compressor but i've heard enough horror stories to keep me from trying it.

I too have cams and i can't say that they made any differences with the idle surging. I haven't figured out what is causing the surging problem as it's not constant, and only does it when the car is really cold. Once it warms up it's fine. So it hasn't annoyed me enough to fix it yet. I have other more prominent problems to tackle.


Now somethign i haven't seen mentioned yet is the use of a scatter shield. I personally put one on when i did my ACT clutch and flywheel. And i would have to recomend that anybody getting serious about racing or messing with flywheels should invest. It was maybe 200 bux but one day my legs my thank me that i got it. I have never been in a car when the flywheel exploded but i've seen footage and pics of the damage they can cause. It isn't pretty to say the least bit. It could potentially kill or seriously hurt someone. Just alittle safety to think about.

 

[chicagoavenger]

As to who asked how to check the flywheel for the correct step height, just take some calipers or take it to a shop and measure the distance between the clutch mounting surface and the friction surface. RRE has a better explanation with pics.
http://www.roadraceengineering.com/clutchandflywheeltech.htm

is this something you do with a new flywheel or when you are re-using an old one?

 

[90blacktsiawd]

is this something you do with a new flywheel or when you are re-using an old one?

Well re-using one for sure. But it doesn't hurt to have a new one checked.

 

[GPTourer]

I too have cams and i can't say that they made any differences with the idle surging. I haven't figured out what is causing the surging problem as it's not constant, and only does it when the car is really cold. Once it warms up it's fine. So it hasn't annoyed me enough to fix it yet. I have other more prominent problems to tackle.

Actually the cams are on my 2G. My 1G was stock. The new ISC got rid of the idle surge except when it was cold, or if it had just been sitting for a little while.

 

[BaddAssGst]

Actually the cams are on my 2G. My 1G was stock. The new ISC got rid of the idle surge except when it was cold, or if it had just been sitting for a little while.

Your bad idle, when the car has been sitting, points to a fault FIAV. I had the same trouble with mine. I swapped in a good TB and the problem has been non-existant.

 

[eclipsegsx1736]

This is kinda old, but I'll chime in anyway. I have the XACT flywheel with the centerforce dual friction clutch. I definitely noticed a difference revving both up and down. Rev matching and heel toe is easier, and it allows you to shift faster around town since the RPMs fall down faster. It's died on me a few times since the RPMs fall down so fast, but now that I'm used to it I know when it will die and tap the gas lightly as the RPMs fall to catch it.

 

[Necromancer69]

Bringing back a dead thread... But how prone are stock flywheels to giving out. My stocker was just resurfaced 13,000 miles ago. I'm curious with my new setup if I have to worry about it going boom on me.