Lightening M103 Flywheel
 

Has anyone tried this? I'm getting into drifting with the Benz and I'm thinking that some easier revving would be the way to go

IIRC the stock flywheel weighs 21.5lbs? I'm thinking of taking off 4-5lbs if at all possible...

Suggestions? Insights?

Yes, very doable. I just had a conversation with my friend about this very topic, as he just had his single mass flywheel lightened and I was looking at that one compared to his lighted EVOII flywheel, which doesn't look streetable (its a race car). Hit up Steve Geyer at the 190rev forum, he knows quite a bit about what can be done.

Does the flywheel = engine harmonic damper?

No.

And Wolfe, where do you plan to find that flywheel? I've been looking high and low and only the dealership seems to have 'em.

Out of my car! I've already got the 5speed :naughty:

What kind of shop/expertise would be required to make a lightened flywheel?

I hate you. :wwf: (J/K)

SOL for me I guess! Gotta keep looking. Maybe I'll bite for the dealership one, but they're charging around $500 in Chi-town for it.

saijin_naib,

All you need is a big lathe, and to know how to use it. Not exactly an "expertise" but it does require some machining knowledge. Also it will have to be balanced afterward, but I think I can just take it to a transmission shop to have that done. Should be interesting to see how it all works out. I'll try to remember to take some pics while I'm machining it.

bsmuwk,

Yea I kinda got spoiled! When I bought my car it already had the 5speed, 3.0 M103, and all the 16v goodies. There is actually a guy on 190rev.net who bought his new flywheel from the dealer for $350. I could get more info on that if you want.

$350? :eek:

Gotta get on that. lol

Here's a quote from 190rev.net, for some reason he didn't say where he got his for $350 :nix: . Don't forget though, these guys were talking about the 2.6 M103, not sure if the flywheel is shared...

**My local stealership quoted me at like $550, Tom at the Classic Center quoted me at like $475? , car-part.com was $100 shipped. You just have to play with the search on car-part.com look for 190e,300e,260e, if not look for just the 5 speed tranny and call them and ask if the flywheel is available. I searched 1986-1988. I think they changed them IIRC in 89 but don't quote me on that.

That would be a dual mass flywheel, which are readily available, the item you would want would be the single mass flywheel, which has been NLA for many years. Best bet is to source them from Germany.

Hi guys !

I building a drift car from w202 c280 and i wanna swap my dual mass flywheel to single mass. Witch one does fit to my m104 ? 3.0 m103 ?

m104 never had single-mass flywheel.
m103 pre-1989 had the single-mass.

what year is your C280? if you have an inline 6 cylinder engine you can use the m103 single-mass matched with a correct "long-shaft" type transmission.

For V6 C280, that's a total different story, you'd need a custom job to fit a single-mass with a manual transmission. And same would go for V8.

Mine is '93 inline 6, with 5 spd manual gearbox. Very rare this modell in my country.

But the gearbox is "short-shaft" type...

Sooo i have to get a '88 m103 flywheel and gearbox as well... How strong is it ? How much the weight of m103 flywheel ? Can i put the m103 manual gearbox to my m104 engine without any modification ?

I wanted to put the om603 single mass flywheel with sinter clutch, but we could not.

It is will not start with out crankshaft sensor.

Now i bought a new stock sachs clutch kit, and we set up with original dual mass flywheel, but it's gonna be short life with welded diff....

Thank you for the answer.

You need to use a flywheel from an inline 6 cylinder gasoline engine. It's the only one that has the correct crankshaft sensor signal pickup plates. See picture: 3 plates at 120 degrees each.

Diesel flywheel won't work.

You can use the single mass flywheel on M104 engine. One thing to NOTE is that you will need to use a small 2mm spacer (washer) under the crankshaft sensor and off course to have the pilot bearing in place.

Long-shaft type transmissions: any will fit: gasoline or diesel, 4 or 6 cylinder, dogleg 190e-16v, all share the same bell-house bolt pattern, even early 4 speed ones will fit.
It's up to you which one you want to pick based on your needs/purpose. You'd have to research gear ratios, final ratio and the pairing with the differential.

Which is the strongest? i don't really know... most of people say that the 190e-16v is really though, but personally i don't like it due to 1:1 final ratio.

I used in several projects the regular H-pattern transmission from 1986 300E mated to C36 M104 engine and never had issues, but i rarely drove the car like a maniac.