is there any advantage over a stock flywheel versus a aluminum, the company I got mine from said its like bolting on 15 hp which I doubt, it weighs 11.5 lbs

 

Weighs less there for the car will rev faster, doesn't add any hp just takes away from rotating mass.

 

do you mean rev faster under a load or just in neutral? so if thats the case then its only good for launching of the line maybe?

 

it reduces the rotating weight, so essentially it's like adding hp.

on a friend of mine's car it was worth a whole mph, you be the judge.

 

it actually can hurt launch(less stored energy, so a shift/traction can drop the RPM more)

 

Muscle Mustang and Fast Ford Mag did a comparison test a few years back on the benefits and disadvantages of an aluminum flywheel. They compared multiple vehicles, from a stockish 13 sec car, to a low 12, low 11, and a mid 10 second car. In each case, the aluminum flywheel was beneficial. Any disadvantage at launch was compensated for by either raising the launch rpm and getting better tires. As far as faster, the aluminum flywheel pays off, hands down.

 

not to hijackt he threat but how bought a heavyer flywheel . i have a centerforce flywheel in mine someone told me it was for better launches . i'm thinking of taking it out because it's a little ruffer in city traffic . whats the benifit of having it ?

 

The centerforce is probably billet which is more durable than the stock piece, but I can see how it could be harder in the city.

It will last longer and hold better than the stock piece. I don't think it's heavier, though. I don't know.

 

Agreed... the loss of torque during launch is an old wives tale.

 

There was a recent article in Musce Mustangs, mostly about clutches that touched on this subject...but from what I've read on other sites and magazines it depends greatly on the weight of the vehicle, horsepower(torque), and rearend gearing. A heavier car with numerically higher gearing would want a heavier flywheel to help move it off the line while a lighter weight car like a Fox-body would require a much lighter flywheel to help it move even with the same gearing.

 

thats good to know that it doesnt hurt the launches cause i heard that tail somewhere else. i got the flywheel cause im starting to do road courses and wanted to get my rpms up as fast as possible on the straight coming out of the turns. i learned a lesson when installing it the first time dont forget to get it balanced to match the stocker or else you'll end up tearing it out again.

 

Yes! and the gains are amazing. With an aluminum flywheel in my car, the car accelerated like you wouldn't believe.

 

Get the aluminum flywheel and make sure it is zero-balanced. While you've got everything apart you may want to change out the throw-out bearing, pilot bearing, and rear seal.

I've got the lightened flywheel with 4.10s and love it... great for the twisties.

 

i have the Fidanza lightweight flywheel with a spec 3 clutch and 4.10 gears. My car weighs 3300lbs and it flys off the line and around corners. Of course it could be the new 383 i put in . But yes i did notice a difference with the quicker revs with the flywheel

 

"A heavier car with numerically higher gearing would want a heavier flywheel to help move it off the line" I don't believe that logic... higher gearing...3.73, 4.10, 4.30 etc etc should lend its self to a lighter flywheel anyway regard less of weight there is more torque multiplication with higher gearing