Sorry for bumping this.
My DMF is also on its way out, and i've been given a quote for £650 from an independent ford specialist (great guy, been to him many times).
the question i had is that is anyone running a bluefin/superchip on their 1.8 tdci? i was thinking of getting the car re-mapped after the new DMF and wanted to know how much it would add to the wear. thanks.
Yes, should be ok, most remaps follow the torque curve of the stock map (ie - bluefin), so does not increase the stress on the trans by a large amount
If you significantly increase the torque at low revs (eg remove the restrictions placed on some stock cars in the lower gears - eg 1st/2nd on the Mondeo ST-TDCI 2.2) it can put more stress on the DMF
So for cars with serious power/ torque increases its recommended to upgrade the DMF to a stronger one (eg Sachs planetery) or a solid flywheel/ SMF - if you are fitting an SMF i recommend you fit a clutch with a sprung plate - upgrading the clutch is a good idea too (stonger clamping force)
My DMF destroyed itself about 95k, the extra low end torque hastened its demise (its the torque at low revs that "kills" it - not the maximum amount of torque (if its gradual or progressive) or power)
The way i think about it is why put a replace component that you know is "soft" the same as the one you took out that wore "prematurely" or only lasts xxK miles? - better to fit a stronger one that will last longer
The longevity of the DMF also depends on the way it is driven - and it will wear out quicker if it is driven hard/ used at low revs in a high gear or used for towing etc
If you are just remapping it it should be ok but if you plan future power- enhancing mods it may be a good time to upgrade the DMF/ clutch
Other considerations are if you intend to keep the car for a long time (so you fit the best bits you can) or if you intend to change it soon(ish) (just do what is nessesary/ "less expensive")
Ive had my solid flywheel/ carbon fiber clutch with sprung plate and heavy- duty backplate + increased clamping force - i prefer the feel to a DMF, the DMF is "sloppy" and seems to introduce play in the transmission - the SMF feels more "precise"/ "direct" gear changes have to be timed right - i prefer this - it suits my driving style
Ive heard all the rubbish about the SMF breaking crankshafts etc - im glad i ignored this and listened to the experts - personally, i wouldent have a DMF near my car, especially not a cheap one/ LUK one
After 2 years of hard driving/ drag starts with a seriously power tuned motor - still now sign of slipping
And the thing about the refinement - an SMF is a whole lot smoother than a DMF on the "fritz"
Perhaps cheap, unbalanced, badly fitted or miss- matched solid flywheels were fitted to the cars that seem "agricultural"?