The 1M Flywheel fitted to the N55 335i

[Adam-M]

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Does anyone know if the lighter flywheel from the 1M will fit the N55 335i Looking at ECS tuning, the fitment looks the same. Here are the links...

1M Flywheel:
https://www.ecstuning.com/b-genuine-...l/21207619659/

N55 335i Flywheel:
https://www.ecstuning.com/b-genuine-...l/21207640733/

I've scoured the forums but can't find anyone who's had success. I understand it won't fit the older n54 335i but can't find anyone talking about it on the n55.

[Greydog]

Hi Adam

As they both run the N55 engine I would think the flywheel is the same dual mass unit. Have you checked www.realoem.com put the last 7 digits of your Vin in the search box it will bring up your model.

Find the flywheel (engine section) then double click the part number and a list of other models it was used in will be shown, if the 1m is there then you will know for sure. Even if ECS lighten their flywheels I would guess they start with an original/pattern part that they lighten and balance so location pins and bolt pattern will be OEM 

Hope this helps

Dave

[Adam-M]

Hi Dave,

Thanks for the RealOEM tip. The flywheels are different... The 1M is an N54, but uses the N55 gearbox with a lightened flywheel which is unique to the 1M. They seem to share the same 6 bolt fitment and the clutch pilot bearing part numbers are the same so I believe they're interchangeable. I'm hoping someone here might have tried and be able to confirm.

Thanks 
Adam

 

[Greydog]

Morning Adam

The last manual car I worked on was my wife's 1600E in the mid 1980's, the last I owned and drove was a Lotus Carlton in 1992 !! So not had to think much about manual set ups for a lot of years.

May be it's the crank boss that is a different diameter? Though if it is the 6 bolt pattern I wouldn't have thought so. Have you contacted companies like Advan (from down under) they have a strong reputation with BMW and may be able to give you advice or a steer in the right direction. 

If this is part of other upgrades it depends what you are trying to achieve, a lightened fly wheel won't give more power it will rev a little quicker (but then I may be teaching granny) They can also have down sides with lumpy tick over etc.

Or may be you have already upgraded to colder plugs and coils, fitted a better intercooler and air intake and have an ECU upgrade with competition downpipes and Cats to aid exhaust. In which case you should be close to 400+ hp (Alpina Spec) 

Dave