Yabo

I was selling the DME from my parts car, then i realized something.. I believe they should be both using the same DME, especially since I'm taking the engine out of that car.. i see 3 different numbers here. Is 078 the only one that matters? because thats the only on ethat is the same...

1, mine
2 parts car

Fishey

They are diffrent you go by the last three bosch digits.

Yabo

Well, which are which for. Shouldn't all 1985.5+ to 88 be the same? Both cars are 1985.5.. as far as I knew, mine was using the late electronics but with an early engine. I had a late afm on as well.

Yabo

Here's what PET says...

Notice that mine looks as if it is correct for 85.5-87. Then there are a couple others for 88. Notice the one that is from my parts car, has no year designation... What gives?

Yabo

Bump

Scott M.

Devon;

I can't find any references to a M44.40 engine in my tech spec book. Find the meaning of M44.40 and you should find your answer.

Scott

Yabo

anyone know? i have no idea what the m44.40 means..

MartinT

From http://www.cantonia.com/specifications.html

M44/40 Looks to be a 944S engine.

Yabo

What? That doesn't make any sense, this parts car was supposedly a daily driver. Didn't look like the DME area was accessed in a long while.. can you use the 944S dme with a 944 without problems?

Yabo

Hm, i just realized, the DME in question ends with 02, not 01.. so its not that m44/40 one then.. but its not in the PET at all?

Ken D

FWIW, and not sure if it applies to your DME: There was a very early production run (beginning around January 85)o f 85.5s that used a unique DME. My old 85.5 used this version of Motronic. It used an EPROM just like the later cars.

Yabo

This sounds like a possibility.. but are the DME's basically the same thing with a different part number? Or is theres omething that won't work correctly? I'm trying to sell the second dme and i don't want to make a mistake...

PS i will be running an FRWILK chip, it makes any difference.

Yabo

FWIW.. I think i figured that they are the same.. I just searched the part number on google.. and here is what i found on a is it a lemon.com .. interesting info...

944 1983-85/1 Control Unit, DME No Longer Available
Engine Types: 944 618 111 01 Bosch 0 261 200 015
M 44.02/04

944, 924S 1985/2-87 Control Unit, DME 944 618 121 DX
Engine Types: 944 618 121 02 Bosch 0 261 200 058
M 44.05/06/07/08 944 618 121 04 Bosch 0 261 200 077

944, 924S 1988 Control Unit, DME 944 618 121 EX
Engine Types: 944 618 121 05 Bosch 0 261 200 086
M 44.09/10

944S 1987-88 Control Unit, DME 944 618 124 AX
Engine Type: 944 618 124 00 Bosch 0 261 200 080
M 44.40 944 618 124 01 Bosch 0 261 200 187

944S/S2 1989-90 Control Unit, DME 944 618 124 BX
Engine Type: 944 618 124 02 Bosch 0 261 200 195
M 44.41

944T 1986-87 Control Unit, DME 951 618 121 BX
Engine Type 951 618 121 02 Bosch 0 261 200 075
M 44.51 (greybeige number label)

944T 1986-88 Contol Unit, KLR 951 618 113 BX
Engine Type 951 618 113 00 Bosch 0 261 201 014
M 44.51 951 618 113 02 Bosch 0 261 201 015



If you notice this part in the beginning...
944, 924S 1985/2-87 Control Unit, DME 944 618 121 DX
Engine Types: 944 618 121 02 Bosch 0 261 200 058
M 44.05/06/07/08 944 618 121 04 Bosch 0 261 200 077

Notice it has both of my DME's listed.. I'm not sure what this means though.

Scott M.

The differences may be as subtle as different fuel curves or a change in ignition advance...

Look up a guy named John Speaks (in England, he rebuilds 928 LH boxes) he may be able to decipher the bosch #'s. His email is jdsporsche@ntlworld.com.

Scott

Yabo

thanks.. most of all i'd like to know which i should put in my car.. as in which is better, or is preferred. Anyone?

Maybe shooting FRwilk an email will help