Hey guys just two quick questions

1) Ive heard some people say they can "lighten" the fly wheel?? and get some power gain from this? would this have something to do with the driveline loss?

2) Any body Tried a oversized throttle body from either RPW or Phillcom, if so how do they go. For around 255 when you send in your old one I think thats an alright price.

Thanks
Pat

Not sure about lightening the flywheel, but the throtle body isnt actualy oversized, its just high flowed.. this can be done by you at home for a fraction of the price. Reffer to this thread for details

http://www.aussiemagna.com/forums/showthread.php?t=10801&highlight=high+flow+throttle+body

You will also find that Phillcom Rally is an Authorized RPW re-seller, so the TB from Anthony ( PR) would be a RPW Unit.

I'm no expert but as far as lightening the flywheel goes it doesn't actually give you more power. What it does is reduce the flywheel mass thereby allowing engine rpm to pick up quicker. Having less inertia in the flywheel means revs will build faster and drop faster which may be both good and bad. Could be good on the race track but not so good for day to day driving.

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ok i been looking into this to ..... i have read many users have made the insie of the TB slightly bigger but i have been told its way more affeftive when u get a highflowed one with a bigger mass and butterfly ... i would rather pay the money

I'm no expert but as far as lightening the flywheel goes it doesn't actually give you more power. What it does is reduce the flywheel mass thereby allowing engine rpm to pick up quicker. Having less inertia in the flywheel means revs will build faster and drop faster which may be both good and bad. Could be good on the race track but not so good for day to day driving.

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Expert or no your dead right :P


Matthius

I did some calculations on my car and for every 1kg less on the outer diameter of my flywheel its the same as 32kg from the chassis. so if your flywheel weights around 8kg then removing 3kg would be like taking a passenger out of the car (roughly because its impossible to take it all from the outside of the flywheel) I wouldnt really recomend machining your flywheel but getting a billet and having one made. this is around 500 dollars but you can end up with a very light flywheel.

I think those RPW throttle bodys are not as good as a full replacement. They dont increse the size of the butterfly itself just smooth out the inside to slightly increase flow. Your better off taking it to a machine shop and having them make a new butterfly and machine out the diameter of the throttle body bore to something you like.

You have over-simplified the matter... :confused:

Flywheels are there to store inertial force to help the engine turnover smoothly. If it weren't needed then the factory won't even put it there. (By your theory, the ultimate lightening would be to remove it completely!)

V6es are pretty self-balancing so they don't need much of a flywheel, compared to smaller 4cyls. Usually you can tell on revving & lifting off... if it takes a looooong time to rev up and a similarly looooong time to rev down again - its usually a big heavy flywheel.

V6es are pretty self-balancing so they don't need much of a flywheel, compared to smaller 4cyls. .

bigger motors have bigger flywheels... want a picture of my flywheel, its pretty tiny. the flywheel is there for the clutch to grip to, autos dont have a flywheel.. they have a flex plate 2mm thick.

bigger motors have bigger flywheels... want a picture of my flywheel, its pretty tiny. the flywheel is there for the clutch to grip to, autos dont have a flywheel.. they have a flex plate 2mm thick.
Flywheel inertia vs friction plate for a clutch are 2 different purposes.

On an auto, the big heavy torque converter donut thingy does the job.

its mainly for the clutch to grip to. they can be taken pretty light without losing too much driveability.