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are light flywheels really worth it

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Old Jun 17, 2003 | 01:15 PM
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are light flywheels really worth it

For all you people with a lightened flywheel are they realyl worth the money... im going to be going single turbo and im wondering if i should buy a new flywheel... its mainly going to just be a street car... but occasionaly i will take it to the track... would like some opionions on which route to take... thank,s
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Old Jun 17, 2003 | 01:41 PM
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yes.
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Old Jun 17, 2003 | 01:45 PM
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From what i've heard it's alot of work cause if u wanna do it right u need to balance the eccentric axel.
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Old Jun 17, 2003 | 01:58 PM
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hell yeah. It's a great mod.
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Old Jun 17, 2003 | 01:59 PM
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It will make the vehicle harder to launch from a dead stop. Much less rotating mass. Idle might also get funky. Should increase engine response to throttle inputs.
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Old Jun 17, 2003 | 02:24 PM
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Personally, I like the stock better.
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Old Jun 17, 2003 | 02:28 PM
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I will tell you in 3 days.

I've heard it's one of the best mods there is next to going single or DP/MP.
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Old Jun 17, 2003 | 02:33 PM
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**** yeah, for daily driving it feels great.

Tim
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Old Jun 17, 2003 | 02:35 PM
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[QUOTE]Originally posted by D-town R2

It will make the vehicle harder to launch from a dead stop.
- It's not that drastic.

. Idle might also get funky.
- Nothing I noticed.

Should increase engine response to throttle inputs.
- Profoundly.

For street driving it's a great mod. I don't notice any launch issues but my hp increased greatly with other mods at the same time so it probably compensated. I wouldn't heistate to do it again.
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Old Jun 17, 2003 | 02:36 PM
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https://www.rx7club.com/forum/showth...light=flywheel
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Old Jun 17, 2003 | 02:39 PM
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Originally posted by r0t0r-rooter
https://www.rx7club.com/forum/showth...light=flywheel
thats me....initially i didnt notice much....well...b/c this post was right after it was installed and all i did was drive back on the hwy from KD rotary...i chimmed in later to say..that it makes a noticeable improvement in every day driveability and just makes the car a hell of alot smoother.
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Old Jun 17, 2003 | 03:39 PM
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I tell you what, the 7 drops and raises rpms more slowly than any other sports car I have driven. It must be because of that flywheel. I'll be doing mine when I do my clutch in a few months.
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Old Jun 17, 2003 | 03:50 PM
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Any of you do any track racing (NOT drag)? How's this affect your performance and such on the track? I'm never gonna be draggin my car, only street and road racing, so that's why I ask.
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Old Jun 17, 2003 | 04:05 PM
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Originally posted by SanJoRX7
Any of you do any track racing (NOT drag)? How's this affect your performance and such on the track? I'm never gonna be draggin my car, only street and road racing, so that's why I ask.
The only downside I could see would be for dragging your car. If you are going to be track racing, the lighter flywheel should really be a bigger benefit.

The downside of a lighter flywheel is the initial momentum/launch. For track racing it should be great because of the response.
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Old Jun 17, 2003 | 04:11 PM
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Originally posted by SanJoRX7
Any of you do any track racing (NOT drag)? How's this affect your performance and such on the track? I'm never gonna be draggin my car, only street and road racing, so that's why I ask.
Here's a quote about the lighter flywheels that I found a while back:

Yes, less load on the engine therefore less drag during the rev. Disadvantage is poor acceleration out of the hole for a launch, ie Drag racing. You need the inertia of the heavy flywheel because we lack torque, and since you don't produce much boost from a standing start, maybe 4 or 5 psi, the inertia from the flywheel spinning at high rpm helps to keep the engine from bogging out of the hole. The benefit on a road course is the flywheel is light and since you are slowing and accelerating rapidly the engine can recover the power faster if it doesn't have to work as hard to spin the flywheel to get the power to the ground!
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Old Jun 17, 2003 | 04:22 PM
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Originally posted by DaedelGT
I tell you what, the 7 drops and raises rpms more slowly than any other sports car I have driven. It must be because of that flywheel. I'll be doing mine when I do my clutch in a few months.

Are you kidding? Maybe it takes longer to go thru the rpms cause it has more rpms to go thru (ie - higher redline). I've never heard anyone say it is slow going thru the rpms, as a matter of fact I've always heard the opposite.

Its also really depends on hp. The more hp you have the faster you'll go thru the rpms.

STEPHEN

Last edited by SPOautos; Jun 17, 2003 at 04:31 PM.
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Old Jun 17, 2003 | 04:24 PM
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Originally posted by DaedelGT
I tell you what, the 7 drops and raises rpms more slowly than any other sports car I have driven.
Yes I noticed this greatly also. I love sport bike revs and I'ams quite sure I'am going to love this mod.
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Old Jun 17, 2003 | 04:24 PM
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Because the engine slows more quickly, when depressing the clutch, I am having some idle issues since I put in my light flywheel.

Other than that, I think it is a great mod. Better response. Feels like more power at ALL rpms.
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Old Jun 17, 2003 | 04:30 PM
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from what im hearing it looks as if most of you say its a pretty good. mod.. so more then likely i will probably go witha lighter flywheel.. thanx for the input
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Old Jun 17, 2003 | 07:49 PM
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only do it when u pull the tranny or engine. save your labor money get some more goodies. i actually have the light steel RB not aluminum its great.
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Old Jun 17, 2003 | 07:59 PM
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Originally posted by SPOautos
Are you kidding? Maybe it takes longer to go thru the rpms cause it has more rpms to go thru (ie - higher redline). I've never heard anyone say it is slow going thru the rpms, as a matter of fact I've always heard the opposite.

Its also really depends on hp. The more hp you have the faster you'll go thru the rpms.

STEPHEN
I'm not kidding. I especially notice it when rev matching on a down shift. I have to wait longer before the revs are up to where they need to be.

And no... it is not because the gearing is different. The difference is tiny.

Last edited by DaedelGT; Jun 17, 2003 at 08:05 PM.
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Old Jun 17, 2003 | 08:35 PM
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Don't let anyone tell you Lightened (aluminum, In my case) Is not streetable either. It's plenty streetable with only one disadvantage I found.

As fast as my rpm's Increased, was as fast as they dropped. This posed a minor problem b'c when my Engine wasn't In full temp mode, the Engine would bog out and shut off when I was In high revs. No problem. I combatted that by slightly bumping up the Idle to 850. Fini!
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Old Jun 17, 2003 | 08:44 PM
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I love my aluminum flywheel. It makes it a breeze to heel/toe and rev match at the track. Driving it on the street is also no problem. Unless you're into drag racing your car, I'd recommend it.
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Old Jun 17, 2003 | 09:15 PM
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Originally posted by potatochobit
only do it when u pull the tranny or engine. save your labor money get some more goodies. .
thats exactly what im doing.. pulling the trans and engine..
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Old Jun 17, 2003 | 10:42 PM
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Does anyone notice if turbo lag increase (specialy on a single turbo)? That's the only thing I can thick of been a problem but I just wnt to know from the people that actually have them.
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