Effects of lightweight flywheel? [merged] light weight lightened aluminum ACT fidanza

[Fryguy]

All light weight flywheel newbie threads are merged here.

I'm looking for my car to be very fast at lower speeds; my main goal is very fast acceleration. Will a lightweight flywheel be beneficial to this? Or should I just save up all my money and drop a turbo on my 84k engine

 

[Black_Bullet]

and don't forget that it will slow down slower, since you have less weight to slow down the engine.

No actually your engine revs will drop faster with a lighter flywheel...
Rpms will fall faster shifting, launching, and just regular driving...
Dont believe me, well guess you got to buy a lightened flywheel to find out..

Okay, thanks. However, Fidanza is one of the lightest flywheels that I know and by far the cheapest and I'm beginning to doubt the quality. Anyone other inputs on different manufacturers would be help.

Fidanza is a good flywheel ive ran it before, ppl b*tch and moan about the driveability but I found it just as easy to drive as a stocker after a day of getting used to it.
It will make the engine rev up faster and shifting will feel a little different.
On a fwd this could increase wheel spin depending how you come out the hole...
Im currently running the act flywheel which is a little heavier but id recommend fidanza.

http://www.dsmtuners.com/forums/showthread.php?t=241066&highlight=fidanza+flywheel
http://www.dsmtuners.com/forums/showthread.php?t=266892&highlight=fidanza+flywheel
http://www.dsmtuners.com/forums/showthread.php?t=236837&highlight=fidanza+flywheel
http://www.dsmtuners.com/forums/showthread.php?t=213900&highlight=fidanza+flywheel
http://www.dsmtuners.com/forums/showthread.php?t=190211&highlight=fidanza+flywheel
http://www.dsmtuners.com/forums/showthread.php?t=174177&highlight=fidanza+flywheel

 

[96gst_4life]

im currently doing a rebuild caused by a spun rod bearing. i also need a new clutch and flywheel (fidanza). will the light weaght wheel last under everyday driving with a ACT2100?

 

[Black_Bullet]

Why wouldnt it unless there was user error...
Ive ran a fidanza for a year with a act2600 with no issues. Well no issues on the flywheels part at least... That flywheel is tough, ive even had motor mounts go all to hell and on a hard pull it caused two of tranny bolts to dislodge and snap off breaking the front ear off of my block and drop my tranny down 2inch while I was driving, screwing my clutch disc and sending sparks flying from under my car. ( Visualize paul walkers pos eclipse on fast and the furious 1 when his floor fell off?) and those sparks were due to everything in the clutch assembly shifting and grinding on my new fidanza flywheel and when I took it all apart the flywheel was undamaged and still useable even after all that.... If that doesnt convice you then just stick with the stocker and forget about it . Fidanza FTW.

 

[jawar666]

As I told you... I can't give you any opinion in other manufacturers because I don't have any experience on them, and I don't know a person using them....

What I can tell you is... I've seen two stock flywheels blow out in pieces in the middle of the high way... but I've never seen a Fidanza do that, and I've never seen a Fidanza flywheel having balance issues...

 

[Pirrofab]

As far as i know fidanza offers a 8lbs flywheel in my opinion it might be a little to light for street driving everyday and may cause misfires due to engine pulsations however on a 1g it might not be picked up by the computer, however i could be wrong. I did purchase for my car an act 12.5 lbs flywheel had it in the car for a while loved the way it revved and dropped rpms, the engine felt more free to do what it wanted. i did have a problem after that point though with clutch engagement after install with the stock clutch. the pedal had a popping sensation towards the bottom of the pedal travel which i believe was from a worn pivot ball. i wound up putting the stock flywheel in and the popping went away but even with the clutch adjusted to catch up top it still catches way down at the floor.
Whatever you choose for your flywheel option just don't be cheap and do everything right, make sure nothing is bent, broken, or worn out. no need to do the job twice.

 

[JWoodley]

Can you get pictures of the cracking? The friction surfaces are replaceable on the Fidanza.

 

[96gst_4life]

the metal inserts do they go bad often or do they last. i dont want to change them every year or so.

 

[Defiant]

What I can tell you is... I've seen two stock flywheels blow out in pieces in the middle of the high way... but I've never seen a Fidanza do that, and I've never seen a Fidanza flywheel having balance issues...

There's quite a few million less Fidanzas to fail than there are ten-year-old stock flywheels that were likely showing cracks and checking the last time they were resurfaced. Anecdotal tales have no validity in such a sample field.

 

[mitch26753]

So i finally have my motor built ready to drop in which fluwheel do your guys like better, fidanza or ACT? im probably going with act 2900 with street disc! thanks!
p.s. i wish these rules weren't so strict i cant post anywhere till i get the newbie status dropped

 

[turbosax2]

Please search next time.

http://www.dsmtuners.com/forums/newbie-forum/190211-act-fidanza-flywheel-one.html
http://www.dsmtuners.com/forums/newbie-forum/145098-flywheel-would-you-pick-act-fidanza.html

 

[El Cuervo]

Well, I can give you a quick review on the fidanza lightweight flywheel vs the stock flywheel on a pretty much stock motor.
Well, first. Do I recommend it. YES!! Some people say that they are not good for a daily driver. In my opinion, its all the opposite. Its awsome on daily driving traffic. There is much less load on the engine. The car doesn't hesitate alot when on traffic going uphill. I don't have a heavy foot when driving. So this is awsome. RPMs climb a bit faster, but also decend very fast too. Some people have reported car stalling because of how light the flywheel is. You can do a search on it for more details. I personally haven't had any stalling problems. Its easily fixed. Just after going into neutral and RPMs start to decend, give it a quick tap on the accelerator and you are good. Other than that, I can't think of any negative side effects for it. Is it a best bang for the buck? don't really know but it really is a good bang for the buck. Specially if you are doing the work yourself.

 

[TalonTSIawd1991]

yea try searching the threads first, go with the act 2900

 

[fulanititoo8198]

I like my 2600 and Fidanza no complaints. A bit lighter then the act.

 

[jdm_hero]

I purchased an ACT 2600 with a street disc. I'm of course going to go with a new master/slave cylinder, rear main seal/ gasket, oem t.o.b/clip, pivot ball, clutch fork ,ss clutch line , oem flywheel bolts but I'm wondering what ACT flywheel I should get, I noticed there are two different types (Prolite/streetlite)? I did some research and kept hearing about people saying that I would still have to have a machine shop step the ACT flywheel to fit my 2600, I'm doing this job in my garage so I really don't feel like paying 200+ for an aftermarket flywheel that needs to be tweaked before install, is this true?

Thanks in advance

 

[blcknspo0ln]

If you buy new, an ACT flywheel should be correctly stepped to accomodate your ACT clutch. Step spec for a flywheel should be .608-.613

RRE's Clutch And Flywheel Tech Info

Also, it only takes a machine shop an hour max to step a flywheel correctly. I dropped mine off at noon one day and picked it up at 2pm and it cost me $60. Pretty no hassle if you ask me. Even if, you can at least ask the machinist to check your step for free.

 

[rrussell]

IMO I would use the stock flywheel if there is enough material left. I have done two of them one for my car and another for a friend and both work great. Both ACT2600lb setups.

Just make sure the machinist does the step correctly.

 

[project_tsi]

I would not use the stock flywheel if you plan on making good hp. It has been known for them to come apart and destroy the trans, and many other things, etc.

I run an ACT XACT Chromoly flywheel and I love it, much better than the Fidanza piece of crap.

 

[kittay]

Don't the ACT flywheels have issues with exploding?
I've been running the fidanza for a year now. Haven't had any issues.

 

[rrussell]

I would not use the stock flywheel if you plan on making good hp. It has been known for them to come apart and destroy the trans, and many other things, etc.

I run an ACT XACT Chromoly flywheel and I love it, much better than the Fidanza piece of crap.

At whp would you consider needing a after market flywheel.

The reason I'm asking. I'm up grading my FP sleeper 16g to a FP3065 and ditching the SMIC for a FMIC and still plan on running bottle. Now I'm a little worried.

 

[kittay]

I wouldn't run the stock one.
Make sure you find one that meets SFI Spec 1.3, 1.4, or 1.5.
You're actually supposed to be running a flywheel sheild as well if you're faster then 11.99

BTW, do you ever come to Firebird to race?

 

[rrussell]

I wouldn't run the stock one.
Make sure you find one that meets SFI Spec 1.3, 1.4, or 1.5.
You're actually supposed to be running a flywheel sheild as well if you're faster then 11.99

BTW, do you ever come to Firebird to race?

Well it looks like I will be changing the flywheel to a ACT or Fidanza.

I'm planning on making a trip down there this season. I run mainly at SRP, Yakima and Woodburn.

 

[kittay]

Well it looks like I will be changing the flywheel to a ACT or Fidanza.

I'm planning on making a trip down there this season. I run mainly at SRP, Yakima and Woodburn.

Awesome. If you do, look for me and say hi
I've seen pics of your car on IMS and would love to see it in person. Nice looking car!

 

[rrussell]

Awesome. If you do, look for me and say hi
I've seen pics of your car on IMS and would love to see it in person. Nice looking car!

Thanks for the kind words. I will let you know when I come down there.

How much did your fidanza flywheel cost you?

Also do you know what the weight is?

 

[kittay]

New they're around 225$. 19lbs is stock and the Fidanza is 8 lbs.
I picked mine up for 400$ (for a new ACT2600 and the Fidanza flywheel) from a guy over in Seattle.

 

[DGajre777]

I have an ACT flywheel with ACT's 2100PP and their 6 puck sprung hub disc. Last time I checked, ACT doesn't make prolite flywheels for our cars, only streetlites.

As for the step, ACT flywheels come stepped for use with ACT's PP and their disc BUT I wouldn't trust their machining skills. Take it to a shop and have the step measured, if it is not right, get it resurfaced. I took mine to 2 different shops and it was in spec at 0.610" (from what I remember), so I didn't have to machine mine to the proper step.

As for a review - I love the ACT flywheel!