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  • M46 and associated parts req. for 240 manual conversion

Been wondering if utilising an m47 with a flat flywheel would require some custom sort of clutch arrangement?

Did stumble upon this thread

user48736353002 My clutch (which has been happy for years) is starting to slip as the engine mods are adding up. Can anyone help me narrow down the best value flywheel/clutch combo for a M47 that doesn't need the crank angle sensor holes? Not running LH2.4. The car is a 1988 240 - If I'm installing a new clutch I wouldn't mind installing a lighter flywheel if there is the option. I did read that the flat flywheel should fit an M47. For a bit of fun, here's a video of it slipping after tuning for E85 fuel tonight. <iframe width="560" height="315" src="https://www.youtube.com/embed/uzwo4_4UigE" frameborder="0" allowfullscreen></iframe> Thanks.

@Vee_Que mentions a combination of falcon pressure plate and a Toyota spline disc. Is this simply for higher power applications?

Did notice there was a sachs clutch kit for m45/m46/m47. So does that mean all clutches are the same? The following reference seems to indicate the early flat flywheel cars have an 8.5" pressure plate/flywheel and later cars have 9". But then they are discussing fitment of a 9.5" setup. In which case, does the m47 typically have the 9" setup? And can it be adapted to work directly with a flat flywheel? Or would it be a case of utilising a combination of early type pressure plate and later type diaphragm? Or am I just overthinking this?

http://people.physics.anu.edu.au/~amh110/Clutch/clutch_upgrade.htm

Oh and the above link mentions balancing flywheel complete with pressure plate. Is that the typical way to balance for most accurate results?

"In direct answer to your question. I used to have an 86 244DL. It had a bad M46. It's the last year for the M46 in a 240 as well as being the last year for the flat flywheel. I used an M47 in it with the flat flywheel without issue. Used a stock 8.5" pressure plate and disc but you use the proper throwout bearing for an M47. It all worked like it was made for it. Plus no speedo issues since it was the first year for the electronic speedo. Didn't need a tone ring of course since the car was LH2.2."

From https://forums.tbforums.com/showthread.php?t=161005

So looks like it's maybe not so complicated.

Also wondering if a regular m47 clutch fork would need any modification to work with a flat flywheel setup?