Mercury

Is a lightweight flywheel to light for a single turbo GT35/40 or GT42 track car. I just won it at Seven Stock and I need to know should I sell it, put it up on my wall of rotary art, or install it when I do my clutch next.

-M

Silver7

there was just a huge thread on LWFW's in the rotary performance section. I say go for it!

allrotor93

iTrader: (126)

let me know if you sell it. i need one.

turbostreetfighter

if you are drag racing dont do it, if you road race go for it.


MWW

93redFD

well the kast time I went to that threas 2 guys where arguing about who new the most about engines, and they also started saying unnessesary **** that way over my head. I think if you put a clutch in go ahead and throught that bad boy in there but I wouldnt drop the tranny just for the flywheel. I here that you dont see full boost in 1st gear when racing but good for road racing

fdracer

if you drive on the street, i would say don't install it. especially if you want to drive up those hills in frisco. w/ a turbo like that, you won't need that extra bit of acceleration anyway.

Silver7

I strongly disagree with this statement. The only time I would not recommend installing one is if you are a competative drag racer running a big single turbo.

IgoSlow

Yeah listen to the man.. he doesn't speak often but when he does he is usually right hahahahahah..

Mercury

I don't want to drag my car, well maybe on ocation. I plan of track and road racing it. But I also plan on going with a GT 35/40 or GT42, and a nice street port. I just want to make sure that in start and stop traffic w/h a Power Extreme clutch that I will still be able to drive it. Not to mention San Francisco driving is a bit tricky with all the steep hills that they have.

-M

fastrotaries

How light is too light for drag racing and for street use? i know that the aluminum Flywheels have a tendency to warp when subjected to hard launches. What do you recommend for an overall picture?

Kurgan

You know its a night and day difference between a GT42 and a GT3540? Thats a HUGE turbo vs. a Hybrid...

How much does this free flywheel weigh?

RICE RACING

I can only tell you this from personal experience, I have a 3.5kg "total weight flywheel and clutch cobination in 7.25 inch diameter (twin plate tilton) the rotational inertial is VERY LOW, and it is hard to drive on the street.

By this I mean you need to be %100 on top of it ALL the time, you cannot relax and the lights when letting the clutch out, because there just is not enough inertia in the rotating assembly to allow you to get of the line without stalling it you do not use a perfect technique !

I drive my car every day, and it is a thing you get used to after a period of time, say 1 month of solid daily driving, A heavier flywheel say 20lb would be far better for people who do not want to concentrate every time they are trying to get away from a standing start for fear of stalling the engine.

But if you have the skill, a light combination is worth the extra headache, the only down side is loss of "stored" energy in the rotating mass at idle which makes standing starts @ low revs a tricky task, but it is definatley livable with if you are a true enthusiast like most of us are.

fdracer

then you should stick w/ stock imo. as for racing i actually think opposite from the norm, i like heavier fw's for road racing and lighter ones for drag. i think that extra bit of torque (i know, it's technically rotational inertia) off boost w/ the heavier fw is a great benefit. let's face it rotaries need all the low end they can get. and for drag, as long as you have a clutch that'll slip a little so you don't bog at the launch, a light fw can benifit you cause you're looking for all out accelaration. i know my thinking is reverse from everyone else, but it's just my opinion.

maxcooper

A light flywheel is great for road racing. Throttle blips bring the revs up much faster for downshifts, and it matters a lot less how good you match the revs. The car has better throttle response and accelerates faster with the light flywheel, and I would say that you are in the wrong gear if you are ever below the RPM that you can make boost anyway.

It does make the launch a bit harder on the street, but you get used to it. You also have to shift a little faster because the revs drop faster. And the car might buck a bit if you try to troll around the parking lot in second gear at 5 MPH. All of these things are livable, but they do require a slightly different driving style. The ease of downshifting and the low-gear responsiveness make up for it to me. The stock flywheel makes the car seem sluggish under some circumstances by comparison.

A heavy flywheel seems to be better for drag racing by all accounts that I have read. You get some extra energy for the launch and you can launch at lower RPM which is good for the clutch. If you plan to drag race, stay with the stock flywheel.

-Max