E30 Zone

Just a quick before the transplant.

I know this is shown to be the most favourable option when doing the M50 conversion.

I'd just like to know what the pro's and con's are for this set up due to having to lighten and balance the M20 fly?

Has anyone had problems with maintaining a constant speed at low or high rev's I.e. round town/motorway?

How much is affected up hills/slight inclines?

I know it will become more responsive but what will the low end torque be like? Will i constantly be shifting to a lower gear to compensait?

Has anyone here used m20 flywheel lightend/balanced and wished they hadnt?

Thanks in advance.

You dont have to lighten the m20 fly as its lighter than the m50/52 flywheels , thats why people swap them, as far as lightened flys go, i have a 5.5kg in my m20 325 which is fine.

BornToBeE30 wrote: How much is affected up hills/slight inclines?

I know it will become more responsive but what will the low end torque be like? Will i constantly be shifting to a lower gear to compensait?

This is bull, nothing more than internet myth, lightened flywheel does not affect torque in any way, it wont slow you down it will make you faster as the engine will speed up much quicker.
If your fitting to an M50/M52 there are clearance issues with the sump, you can butcher the sump but its better to skim the flywheel back to the ring gear or just fully lighten it

this is the 2nd best mod to do ,the 1st being an m50 manifold

Biggest advantage in MHO is getting rid of the dual mass flywheel and its inevitable problems.

DanThe wrote:

BornToBeE30 wrote: How much is affected up hills/slight inclines?

I know it will become more responsive but what will the low end torque be like? Will i constantly be shifting to a lower gear to compensait?

This is bull, nothing more than internet myth, lightened flywheel does not affect torque in any way, it wont slow you down it will make you faster as the engine will speed up much quicker.
If your fitting to an M50/M52 there are clearance issues with the sump, you can butcher the sump but its better to skim the flywheel back to the ring gear or just fully lighten it

yeah where HAS this flywheel makes torque bullshit come from?!

randomspeedfreak wrote:

DanThe wrote:

BornToBeE30 wrote: How much is affected up hills/slight inclines?

I know it will become more responsive but what will the low end torque be like? Will i constantly be shifting to a lower gear to compensait?

This is bull, nothing more than internet myth, lightened flywheel does not affect torque in any way, it wont slow you down it will make you faster as the engine will speed up much quicker.
If your fitting to an M50/M52 there are clearance issues with the sump, you can butcher the sump but its better to skim the flywheel back to the ring gear or just fully lighten it

yeah where HAS this flywheel makes torque bullshit come from?!

Probs off need for speed or something. I can't think of any disadvantages of a lightened flywheel, it's a no brainer not getting it done whilst the engine's out.

^ Not true

People are lazy and people like cars the drive themselves these days and car manufactures need to make changes and factor this in. A dual mass flywheel or even an E30 M20 flywheel over an E21 M20 flywheel have been designed to make it easier to set off from a standstill, on a hill etc and having a larger and heavier rotating mass makes it more difficult to stall the engine.

This doesn't mean that sticking a flywheel that weighs half the weight of a stock item is going to no negative effects but the benefits far outweigh the cons and unless you're doing this engine / flywheel swap for you 80yo gran i really would worry about it.

I can't believe these questions get asked so so much, seriously, take as much weight of an M20 flywheel as you can get away with and enjoy, it is possibly the best mod for this kind of money unless you get an M50 inlet from the breakers for a tenner.

Try and get granny to do a hill start with this



Complete assembly is approx 3kg, its not designed for slipping

DanThe wrote:Try and get granny to do a hill start with this



Complete assembly is approx 3kg, its not designed for slipping

That is a lovely bit of kit there will it work on an M52 ??

you could always get it wrong if your thick enough.

there's plenty 5.5 kg m20 fly wheels out there to leave you wondering why you never bothered.

How much do those bad boi's go for then dan?

fowler wrote:

DanThe wrote:Try and get granny to do a hill start with this



Complete assembly is approx 3kg, its not designed for slipping

That is a lovely bit of kit there will it work on an M52 ??

Me Gusta.

anyway, totally agree with the above the flywheel is simply an energy storage device that smooths the torque variations caused by the compression/combustion events.

a lighter flywheel simply means there is less energy to simply release and a bit more finesse with the clutch is required.

infact it has been mathematically proven by geoffbob that the single mass flywheel will give a noticeable improvement in the 1st gear acceleration of the m42 engine.

DanThe wrote:Try and get granny to do a hill start with this



Complete assembly is approx 3kg, its not designed for slipping

I'd just lauch it from 5K everytime i wanted to set off with this