RRTEC

iTrader: (13)

Ok my car has a lightweight flywheel... I have a couple small complaints about it..

1) The car winds up quickly as far as rpm go, but the initial acceleration is not as what one would expect from a modified car.

2) The Rpm drops so fast inbetween shifts that I start out in the bottom end or (Zero torque zone) of the rpm range. I find myself double clutching just to keep up with normal traffic...

3) Car is slow to Accelerate up hill, but hauls *** on the interstate/level surfaces... I actually got to 140mph in 5th with pleanty of power/tach left.. I will post a picture tonight...

I can pop the clutch while driving 15-20mph in second gear and I will roast the tires, so it has high end torque like a MUG but I can't even get it to burn out in the rain by just stomping the pedal.....

Any words of wisdom? Kinda wish i didn't have this damn flywheel....

aznpoopy

thats normal

a heavier flywheel stores rotational momentum
easier go from a dead stop
the engine rpms will drop slower because the flywheel has alot of inertia
etc

reverse is true for a lightweight flywheel
going from a deadstop needs higher revs
revs drop quicker between shifts
engine braking will be less effective

what you are saying sounds normal for a lightweight flywheel. you just have to adapt your driving to it. basically higher rpm launch, shift at higher rpms, etc. you lose mpg too! but it sure is fun to drive.

fidelity101

iTrader: (11)

thats wierd, I love my aluminum flywheel but traffic with it is kinda a bitch and the uphill from a stop is a bit trickey.

but man it revs up quick and nice, especially when you dont have any acsessories on the pulley heh

91mazdarx7

hey rrtec what kind of flywheel are you using an aluminum or lightened steel i'm interested in knowing because i'm thinking of changing mine but would like some reviews first

RRTEC

iTrader: (13)

Lightened steel, It came on a rebuilt motor I had, It has holes drilled all over the place, looks like quality machinemenship. THe shop that resurfaced it said it appeared to have been built professionally. Dunno who made it though.

carsaregood

i thought it was more effective ?

F1blueRx7

iTrader: (5)

No, the heavier the flywheel, the more resistance it provides.

I'm interested in finding out how my ACT Streetlite flywheel will feel like when I install it.

takahashiRyosukeFC3S

as stated earlier the heavier the flywheel the more enertia it stores. the lighter, the less.

so...

the heavier flywheel helps push the rotors around past their compression point; where as the lighter flywheel has less enertia to help force the rotors around past their conpression point.

but as for the initial question, what you are experiencing is typical of a lighter weight flywheel. - rougher idle (unless you turn it up) - nice fast spool up of the engine. - higher rpm needed to use the power of the engine.

makes me wonder about a mid weight(about 14lbs) flywheel with a slipper clutch setup...

hope that enlightens some and maybe confuses others,
TR

RRTEC

iTrader: (13)

The idle is a bit lopey... All in all I need to autocross it to see how well it performs. As far as Street use goes I would give the Lightweight flywheel a big thumbs down.

RRTEC

iTrader: (13)

Btw it really doesn't help my low end with the 5th and 6th sleeves removed.

GTU_FAN

I got a prolight and an ACT clutch kit. Works great. But I also have a racing beat true-dual so I guess my low end is better so I dont really have many drivability issues.

jpd3253

The following may be of little value because I used a RB lighten steel, which does not have any holes so most likely it is not a direct comparsion in terms of weight. That said, I've not experienced anything like what you have described. The RB lighten steel has a stock "feel" with a noticable performance change. I chose the steel over the aluminum because I had concerns about the idle and rapid drops in revs. Had I gone lighter than steel, I'm sure that I would have had problems with the A/C, which is still functional. On rare occasions, coming off throttle quickly with the A/C on, the engine stalled. Seems like your flywheel is just too light for your tastes.

fc3sfreek

iTrader: (6)

i have an 11lb act flywheel with a stage 3 ACT clutch/PP and i really dont find it so bad in traffic but i do lack in low end, i just figured it was cuz my car is a turboII

Rx7TyreBurna

iTrader: (1)

Uh, check my sig for my mods. But yea. I noticed a drop in lower RPM, but a slight increase in higher RPM. I have already killed the hell outta my low end, so i figured i would do a little more.

Starting on a hill from a stop is really hard. I have killed it a couple times, and also sometimes burn the hell outta the clutch. Smells really bad.

Anywho. I like the light flywheel.

I think the best mod was the free flowing exhaust. Dual exhaust sounds sweet. .

F1blueRx7

iTrader: (5)

erm... He was asking if it made engine braking more effective with a lightend flywheel, which is does not.


ACT doesn't use stages to identify their products.

They have 'Heavy duty' and 'Xtreme' Pressure plates, and then Sprung/Unsprung fullface, 4puck, and 6puck clutch discs.

I've got sitting next to me an Xact streetlite flywheel, Xtreme Pressure Plate, and a Sprung Street/stip full face disc. I guess it also helps to mention that I have an S5 turbo, so I'm hoping my car doesn't have problems on hills .

fidelity101

iTrader: (11)

if I had a turbo, I'd keep the heavy flywheel or just get the lightened steel one, but not the aluminum, if you got boost, your gunna need that extra mass.

arghx

iTrader: (3)

uhh you have an N/A, don't blame it on the flywheel

88IntegraLS

Wankel powered FC NA vert, aluminum flywheel, 17x8 rims, yeow! That's like the antithesis of the recipe for neck whipping off-idle torque man.

RRTEC

iTrader: (13)

HAr Har.. The car is bieng prepped for a S5 turbo... SO I am just building it up slowly...

I am just a poster child for throwing parts at a car without thinking of the consequenses I guess.. What a jackass I am for keeping my car Wankled.. Why would I do thAT when I could put inferior parts in it and ruin it's resale value...

Bukwild

yeah a 17lbs flywheel is the way to go if you plan to mod your t2. The stock t2 flywheel on my s4 is a beast but it helps get the turbo vert and its extra couple of hundred pounds out of the whole faster. Its also a good mate for my 6 puck act HD. You will also find alot of guys with the 9lbs flywheels want to roll race because they could get spanked out of the hole by your Mom's minivan.

RRTEC

iTrader: (13)

Yeah, on a roll I have most locals (honda's, stockish mustangs and camaro's) but from the get go.. geez 18 speed bikes give me a run for my money..lol

yusoslo

I myself am about to install a 9lb flywheel and ACT HD 6 puck clutch in my T2. But I road race and auto-x. I hope I like it.

carsaregood

by this logic, wouldn't engine compression want to slow the rotors (and car when in gear) down faster? just trying to promote discussion and better understand why a lighter flywheel would reduce engine braking.

The Wankler

iTrader: (14)

I have the lightened steet act, and have a ROCK SOLID idle at 750 rpm. I am also street ported. The spool up is great