Author Topic: Light weight Fly and performance clutch. (Read 2446 times)

quinn11m20 · « **on:** October 31, 2009, 12:09:47 PM »

So I know we have covered this, but I have had a difficult time searching for the results.

I plan to swap from the stock fly to a performance one from BMP Design. I also plan to buy from Spec a stage 2+ clutch. I have asked my mechanic about the swap and he informed me that the engine was not designed with a lighter fly in mind. It will have idling problems.
For those of you that have accomplished this conversion and switch, I would like to know what to expect on the daily driving issues.
Yes I know all of the supposed perfomance gaines. Thats why I want to switch. What I am interested in is am I gonna have tuning issues?
By the way I have done the AFM to the MAS and noticed little to no real gains. My fuel economy went down though. I am planning to upgrade to some RC engineering injectors. The injector upgrade would be because of the throttle response that a lighter fly will produce. I don't want to lean out my motor and grenade my engine. Any advice for this thread would be greatly appreciated. T.

Seriously any help would be appreciated.

quinn11m20 · « **Reply #1 on:** October 31, 2009, 02:50:26 PM »

Any one?

gtatbrissy · « **Reply #2 on:** October 31, 2009, 07:41:32 PM »

i have a bmp design flywheel. its good shit. i didnt tune my engine after. the cons are that it doesnt like driving below 2k. ie 5th gear at 60kph. also the idle is a bit rough when the ac is on. other than that its all positive.

nicknikolovski · « **Reply #3 on:** November 02, 2009, 02:40:58 AM »

The dual mass flywheel is basically two flywheels stuck together with a bunch of springs inside and its designed for the engine to act as a damper at idle and when load is placed on the crank ie A/C.

Here's some info about the lightweight flywheel:
Aftermarket lightweight flywheels are designed to weigh less than the SMF and the DMF by at least 50 percent. The most common ALFs are constructed either of aluminum or steel. Most aluminum flywheels feature a replaceable friction surface, making them easy to rebuild. On the other hand, a steel flywheel can be resurfaced only once.

Pros: On a naturally aspirated vehicle, an ALF is a good way to reduce excess rotating mass, allowing for increased acceleration.

Cons: Excessive low end clutch chatter, premature synchromesh wear, and possible engine damage will occur if the ALF is too light or not properly balanced. If the ALF is too light, a lack of initial inertia can cause the vehicle to stall easily when moving off from a standstill.

quinn11m20 · « **Reply #4 on:** November 02, 2009, 04:25:02 AM »

Good. Thank you. That was the info I was looking for. It is greatly appriciated.