Originally Posted by
GT2871RBLUBIRD 
The other side, lightweight flywheel = worse highway gas mileage, says since it has less inertia you have to compensate by pressing on the gas more.
i wonder by having the lighter flywheel if weather or not it not only requires more accelleration percentages to sustain the same ammount of intertia as a stock flywheel would have, if in return you would have to incorperate more throttle percentages opening up the throttle wider, using more gas. thus causing you to incorperate more thorttle percentages and more accelleration percentages over a stock setup to maintain speed.
IMO i say @#$% it and love the gains you see from a lightweight flywheel verses any negative you might be able to conjour up lol.
i believe most people would say that too, i love lightweight flywheels for the fast accelleration and the fast decellerations, on the highway with boost lightweight flywheel is just crazy.
I honestly enjoyed the light flywheel an my 6 puck clutch for one reason, no one could drive/steal my car
. The acceleration was nice, and since I bought it expecting better MPG's as per what most people say, I was disappointed.
Gas Mileage:
It seemed to decrease it on the highway, back down to 27mpg from 30ish. I don't have any hard data because I was expecting the gas mileage to go up not down. But I installed more then one "big" part when I installed the flywheel.
Traction:
I had a ball bearing T25 that lost traction at 5k rpm before motor mounts. Solid prothanes solved that problem and I could put first gear to redline without loosing traction. After installing the 10lb Fidanza, it went back to loosing traction at 5k rpm.
Originally Posted by
M0J0 And since MPG is best when cruising at a constant speed, the less energy you need to put into the rotating part of the car, the better MPG. Which means that the heavier flywheel will have a higher amount of inertia, and requires less energy to keep that momentum.
Since I reread bunch of threads this morning when posting the update, it finally really clicked why light flywheels do worse on highway. It's the whole not having enough momentum when going uphill, and faster engine deceleration/braking when you let go of the throttle or downhill.
Be the first to like this post.
Back to top
