from what i hear the stock g flywheel weighs what 33 lbs? how much of a difference is there going to be with whp with a 12 lb flywheel?

 

Probably minimal gains, depending on speed and gear. Lower gears will have a larger increase, due to rotational inertia, but overall, not much.

You will feel it in overall engine response being quicker, reving and dropping revs faster, and also vibration from the transmission increasing. You can also expect to having the learning curve to keep from stalling/killing the engine at stoplights or in bumper to bumper traffic.

 

it will grab alot better....

 

yeah but from what i heard... for every lb you lose off your drive train is an addition like 1.8 whp... and from some of the dynos i've seen you lose quite a bit of hp from the crank to the wheel. so although you wouldn't be gaining hp you'd be gaining a decent amount of whp....

 

lighter = less energy to move, so you will definitely feel a difference. Even if everybody says only minimal gains its the small things that makes a better overall car. all those minimal gains turn into one big gain right? shoots peace out

 

When I had changed out the clutch to an Exedy twin plate one.....it was ooookkay. Driving was definitely different. It grabed harder and it was either on or off. Slipping the clutch became a little more difficult and driving in stop and go traffic became an adventure and a workout.

If you are adding HP...then it would be a worthwhile job. But, if you are just really just enjoying the drive and all....then I am not too sure. The heavier flywheel allows the car to move in first gear easier slowly because of the momentum that the heavier weight carries in turning the crank (I think this is the correct way to explain this). A lighter weight flywheel while will allow the car to rev faster would need to rev higher to move the car from a dead stop due to the lower amount of momentum in the initial turn of the crank. Crap...I can visualize this but cant explain this any better...sorry.

Then there will also be more clutch chatter. You will hear it in idle. Sounds like something is about to fall off under your car at times.

Mind you...I did do it. It was....interesting. Would I do it again? Errrr maybe but maybe with a different combination. Before you proceed...call the guys at Performance Nissan in Cali. They can explain this to you better than I can and perhaps match the correct clutch and flywheel combination for your application and type of driving. The knowledge would at least give you a better idea on what to expect and how to proceed. Goodluck.

 

well i want to put in a greddy TT so i need to upgrade anyway but i was just curious more so about the effects of the weight loss and gain in power transfer. i understand what your tring to say but as long as the clutch is engaged then it shouldn't need higher rpms to move the car in first. but then again your the one with the experience.