What is too light of a flywheel for the street? What do you ugys have and how do you like it?

depends on how hardcore you are.

Im gonna be running a 12 lb RB flywheel. Im not sure on how its gonna act though!

I'll tell you this spring when i install the engine.

i have the 17lbs racing beat wheel and i think its what it should have come with from the factory. the 12b is a little lighter on the street than what i expect, imo

How does the 17 lb feel? Does it leave much to be desired? Would you buy the same one again? Do you drag with your car?

its purley a street car, the 17lbs feels like what they should have had in there in the first place. the stock flywheel is rediculous. the 17lbs is perfect

I'm going to be using a 9.5 lb on my car that will be running in january, that's probably too light for the street. They use a heavy flywheel to make the motor rev and accelorate smoother, maily because there is not much rotating weight inside the motor.



with too light of a flywheel, taking off can be a bear because without the rotating weight it will be much easier to stall. also if you acceltorate in first or second, and then let off the gas (with it still in gear) you can get a bucking motion in the car which realy makes it tough to cruise in, but with that light of a flywheel, my 5mph-60mph should be sickening. woooo hoooooo

Actually on a s4 13B you have about 20 lbs of rotors alone orbiting inside yer engine, I don't think you need more mass from the flywheel.



The engine has **** for low rpm torque, as a result the added inertia when you go to engage the clutch keeps it from stalling easily compared to a piston motor with more torque down low.



I run the rb aluminum flywheel, its very easily streetable, you just have to drive well. It will be easy to kill it leaving stops, especially when you're starting from a stop up a hill. You have to pay attention to the clutch more is all, you get a much more responsive engine, quicker shifts (no more waiting for rpms to change, you make them change immediately with the throttle, it gives greater control) and greater acceleration in the lower gears. It takes a bit more rpm and more slipping from stops for sure, if you reduce the weight of your car significantly it will get moving easier though https://www.nopistons.com/forums/pub...DIR#>/wink.png

i have FD flywheel... wheighs in at 17.8 lbs according to fedex scaled with the fedex box

does the fd flywheel use the same pressure plate as a s5?

The S5 TII clutch and pressure plate will work with the FD flywheel.

i have a FD clutch in my S4 TII and an S5 pressure plate and stock flywheel...

I suppose a 12 lbs flywheel is reasonable. The reduced driveability can be a bitch but at times I love it.

I had a 9.5 pound flywheel, and I liked the way the car drove. The acceleration in the lower gears felt a little better. It wasn't too tricky to drive with the light flywheel.

hmmm, maybe I should go with the 9.5 lbs flywheel.

So it seems that a 12 lb is a good compramise.



dont mind the blue stuff

It seemed to help the turbo spool a little faster. If I were you I would stick with the 12 lb. Racing Beat flywheel. I had the 9.5 lb. SR Motorsports flywheel, and they suddenly decided to change their flywheel, meaning that I can't get a new friction surface. It probably CAN be found, but they won't tell you. They just say that you need to buy a new flywheel. You won't ever run into that situation with Racing Beat.

Drove my TII for a year with a 9.5# flywheel. I never had any drivability issues with it. In fact I had a better 60' time w/ the 9.5# flywheel then I do now with a stock FD flywheel.



I loved the way my car would wind out 1st and 2nd when I was autocrossing. It is a very worthwhile mod. I want another 9.5# for my car now.

I had a red n/a like that..........shudder...........NOT a cruiser lemme tell ya.........

did you change your front counter weight?

thats not caused by the light flywheel.



Worn motor/trans mounts, slop in the drivetrain (u joints, rear end...) and a misadjusted/bad tps cause this drivability issue. It's a bitch to keep the tps perfect on the stock ecu especially S4 where it works well on/off throttle. A lighter rotating assembly will exacerbate the problem but it's not the cause.

so a 12 lb. fly is good for daily driving, what about drifting?

Thx bro. I hated driving that n/a. Never thought I'd say that. My new n/a is WAY nicer, but it's a base! WAAAAAAAAAAAAAGH!!!

12 is the lowest you can really get



RB weighs the flywheel and counterweight together to get 12



other companies with the 9.5 is just the flywheel without the counterweight



unless you go really light with the (forgot brand name) 7.5 flywheel

rotary guru, sells that I think

He said that he had the stock flywheel.

the lighter you go the fast its revs in lowend but a major loss to topend power. the lightest you can get is a 8.6lbs. but thats strictly light-to-light. go with a 11 - 12lb one. if you are gonna get one at all. but im not sure if you have to change your counterweight. i'll talk to my freind and find out.

opps you are right sorry didn't read closely.

You add a rear counterweight. The flywheel usually comes with it.

major loss in top end power? what are you smoking?

Looks like I'm going with the Racing Beat 12 lbs flywheel. I appreciate your input.

lightening flywheel just decreases the weight of the rotating mass



you rev lots faster...the only "con" would be dropping revs faster too....but sometimes that isnt a con