BMW E30 M3 - S85 DCT [RNGTOY]

[s62]

When I bought the engine+gearbox in 2007 I did not know
what clutch was in the package. It has worked well, never
felt it slipping.

Anyways, now that everything is apart, I can see what is
in there:


Flywheel, no markings, stock presumably?


On the clutch disk is this text: 20.1864 098103 BMW 21212226958.9

"11.01" is probably production date - November 2001?
Google says this is a stock disk from an E36 M3 or
E34 M5 3.8.

Here is the pressure plate:


Lots of markings:
- Sachs TYP MF 240
- Sachs Race Engineering
- 88 3082 999 722
- 06 2002

Presumably made in June 2002. If you google 88 3082 999 722
then you see that this is supposed to be good for 420-535Nm
depending on friction material. I probably have the 420Nm
version.

Now it´s just the question what I should do regarding clutch?

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All info appreciated!

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Cool.

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Delivery this morning

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Engine teardown in progress:

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Well... got this small shipment today, a suitcase that could not
be checked in on a flight from Denmark to Iceland. So it was
delivered by freight today:



Hmm, very well packed.


Isabella is not moving it a millimeter, it´s 54kg!!!







If the S14 purists disliked the S50 they sure are going to have
a cow now

[s62]

Well... it´s not much heavier than the S50 (steel block with
SC bits vs. aluminium block). The center of gravity will be lower.
So I am not concerned with weight or the distribution of it.

As for charging.... it´s going to be N/A, most likely 5.4L.
However, the block is sleeved so I can change my mind later on

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Thou said:

Fantastic read, just read all 12 pages. Are the videos hosted anywhere now though? As all the links are down.

Ok, I need to fix that.
Until then just change www.onno.is\blahblah to www.rngtoy.com\blahblah.

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Here is the power curve for a similar motor that my tuner
friend tuned:



Nice curve for a track car

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Thou said:

That is a lovely, linear curve. Are you still using Auto Tauber to carry out the work?

No this will be done here in Iceland.

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Many people seem to have strong opinions on the viability of
putting the M-DCT box behind the S85.

Some say that it has never been done and cannot be done
because of software reasons.

Well.... they are wrong

Not only has my tuner friend a solution for this but it turns out
that the ///M division has actually made one example of this
combo and written software for it

Quite relieved that this stumbling block seems to be out of
the way.

As to get the actual box in the car I hope to have the box and
headers shipped to Iceland later this month. Then I can start
test fitting the stuff and see how brutal the transmission
tunnel redesign will be....


Also looking into running either E60 M5 or E9X M3 instrument
cluster.



Getting some of the gauges working is easy (like
tacho getting info from the ECU, same for gear) but others
are a bit tricky. Speedo and fuel gauge for example I´ll have
to take analog signals and translate to CAN messages.
Looks like this part is getting solved by a very talented
BMW employee (and an M3 freak) in Munich - will keep you
posted.


As for changing gears, I could use paddles but somehow I
like the idea of something like this



Only need a signal up/down.

[s62]

chuntington101 said:

Amazing work mate! Although why not strap a couple of turbos or a supercharger to the motor while your at it!

Packaging might be tricky

Also want this to be a solid setup, no heat / boost issues that plague FI.

600+ hp should be enough for a track car weighing less than 1300kg.

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Little testfit, plenty space!!

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Sf_Manta said:

Should fit no trouble, I've seen V12's squeezed into the bay of the E30 before now.

It was designed to take a straight 6, so squeezing a V8 or V10 into it shouldn't be hard as they're shorter engines, the exhausts though might be a issue! Loving this project either way

This has been done before, stock headers fit.

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No, been busy at work and am remodeling the bathroom at home.
That bathroom seems to be sucking up all the money in the world

Hope to get this project back on track soon.

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crossie said:

did you get all your supercharged bits sold in the end?

Actually it looks like the engine is about to be sold, without the SC bits.
So the kit might be for sale seperately soon.

[s62]

This has been "progressing" slowly....
Other things in life seem to get in the way of spending time/money on this

Got a friend of mine who has already tore down his Europameister E30 M3 to help me yesterday, he´s very normal:



Drysump tank out:


Surface rust under battery:


Rear side windows out and started to remove the heater:




Worse has been seen on E30's, hopefully salvageable:


Small rust dot on the A-pillar:


Seems ok here:


Some cancer:


Garage filling up with parts
Need to get some off to storage:


Took the drysump tank apart while taking it out, cleaned it and reassembled:












Plan now is to strip the car as soon as possible and then it´s getting blasted by "Dustless Blasting" ( Home - Dustless Blasting). Then I´ll get a better idea how much metal work has to bee done.

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e21Mark said:

Any progress?

Moving along at a snails pace....

Sourced a bank2 head from the US. Need to get the rest of the engine parts from Denmark to Iceland.

And.... add a few hours to each day so I have time for this!

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jcolley said:

I have quite a few S85 parts as well if you need anything, but also in the US. And my good friend is the largest S85 parts guy/rebuilder in the world.

Troy?

jcolley said:

Regarding the DCT, I absolutely think it's possible, and I'm not even sure how much would be different for the software. Much of the logic which controls shifting the transmission resides in the stock DME. Both the mss60 and mss65 share identical map structures for the this area, so if you're using the stock DME, creating a tune file which applies the E92 M3's logic into the S85's DME would be quite simple.

Are you planning to use the mss65 and the OEM DCT module?

I am lucky to have a few friends with good connections so they have
sourced the necessary software
Yes all original ECU's.

[s62]

Alias218 said:

Fantastic car OP, you're very lucky.

What are the specs of the engine? Has it been built to any degree? At some point in the future I'd like to supercharge my 350Z. What would you suggest are the components that need changing to suit FI? Being 10.6:1 CR I'm thinking pistons, plus rods at a minimum.

Thanks for any advice!

Are you talking about the engine that´s going out or in?

As for the 350Z, I have no experience/knowledge of that engine so
I think you will have better luck asking in a Z forum.