For those with M50 conversions........

[m-dtech]

If using the iS gearbox what ratio diff can be used?
3.64/3.73?

318IS has as standard a 4.10 ratio diff.

im using 318is gearbox and standard 4.10 diff at the moment, will prob go for 3.XX LSD later.

this is probly the best "budget" m50 as you can use it and upgrade later

[Kedge]

Been told you can use the M42 flywheel and clutch.

So use the 320 prop but what about the gear linkage then?

[m-dtech]

Been told you can use the M42 flywheel and clutch.

So use the 320 prop but what about the gear linkage then?

i just modded the existing 318is linkages.

although, im told there are others that would do the job.

318IS box is same length as e34/e36 box.

i feel like a proper keyboard warior lol

[brian325i]

right so..with mechanical side of things sorted whats the story with wiring??
E34 loom and ecu from car before 1994..
plug and play??ews problems??E30 connector changed to fit E34???????

will the benefit of retrospect what would those who have done it do different..ie just use m20 rubber mounts and e36 aliminium and not bother with e28m5 ones ..gearbox mounts???etc thanks

so far e34 engine loom ecu..E30 318is gearbox..e30 320 propshaft..e30 325 gearlinkage..golf mkii brake servo..m50 clutch lfywheel etc match to e30 is box ya??

lot of questions im eager to start

[DanThe]

M20 mounts are a bad idea IMO, they fail under the M20's load.

E28 every time.

E21 gearbox mount rubbers

[m-dtech]

M20 mounts are a bad idea IMO, they fail under the M20's load.

E28 every time.

E21 gearbox mount rubbers

i agree with this, the m20 mounts are a bit crap. but was all i could get at the time.

although i have used the existing gearbox rubbers as they are e30 items anyway.

[brian325i]

gearbox sorted so..what story with wiring?thanks..all info is great

[Brianmoooore]

Brian325i - Avatar a little on the large side!. Could you reduce it a bit, please.

I've deleted it.... my poor laptop could not cope with that! ***E30Mark***

[DanThe]

[m-dtech]

wiring took me the best part of a day, but i wanted to shorten and tidy up the loom so it fitted in the 318is loom tidy.

as long as you get the main wires connected you will have a running car

i used a post that brianmoore wrote with all the pin outs etc.

as above click "search"

[brian325i]

ok i sorry bout pic thought they automatically re-sized..

i know im new but i cant operate the search thing properly..seing as ye can cud ye please just post the link or somethin cause i really cant find it..sorry and thanks..it be faster than printscreen and writing click it on it

[eko]

Wiring depends on if you have a pre or post facelift car!

[m-dtech]

wiring also is different for 4 pot and 6 pots

[Brianmoooore]

wiring also is different for 4 pot and 6 pots

News to me!

[m-dtech]

wiring also is different for 4 pot and 6 pots

News to me!

using your pin outs on the m50 developments thread, there was differences in wire colour and 2 of the pins were different.

m

[Brianmoooore]

There are extra pins on a six cylinder E30 body loom for the oil level switch if the car has the "check" system.
Apart from that, four cylinder and six cylinder E30 body looms are the same.

[DanThe]

Take no notice of colours, Pin No's are what you should be looking for.

[brian325i]

e30 318is to 93 525..wiring..ive tried abd tried the search..read so much stuff..i know ye are sick of replyin to these m50 threads but all i can find is...use search loads out there..i did and all i get is use search..please if anyone can help then do please..not bein smart but please dont reply sayin use search

[DanThe]

http://www.e30zone.net/modules.php?name ... velopments


Everything you need to know should be in that thread

[Brianmoooore]

http://www.e30zone.net/modules.php?name ... velopments


Everything you need to know should be in that thread

Page 5 is where I make my contribution to the C101 wiring.

[brian325i]

that link was the business..got nothing done in college today but learning how to wire an m50 into an e30 is way more interestin than 16th century poetry

..one thing i noticed is s few wiring diagrams didnt match the other..colours etc wee different..but both said theirs worked..who done the 318is swap ? excellent read..tanks for the help

are the colours different cause the original car was different ie..one was 320 other was 318is or did the people just write down wrong colour??

suprised on how little wires to chop and connect..i expected more

[DanThe]

Take no notice of colours, Pin No's are what you should be looking for.

Take note!

[brian325i]

note taken i thought all the wires from e30 side shud havebeen used th and accordin to m50 development thread 3,16,17,19 are not..i know u have a fair few left on m50 plug side due to extras but why from e30 side

[Brianmoooore]

3, 17 and 19 have always been "no pin present" on all the E30 engine and body looms that I've checked.
16 has a white/black wire on the engine looms, which I did take the trouble to find out the destination of once, but didn't write it down!
There's a spare white/black at the diagnostic socket, so it's possibly the other end of this.

[brian325i]

3, 17 and 19 have always been "no pin present" on all the E30 engine and body looms that I've checked.
16 has a white/black wire on the engine looms, which I did take the trouble to find out the destination of once, but didn't write it down!
There's a spare white/black at the diagnostic socket, so it's possibly the other end of this.

excellent sounds like everythin is summed up so...

if u take off the inside 3 manifold by the rack and cut off the flanges,took the "straight " off the three and then welded back on the flanges ..would that work??

[Brianmoooore]

If u take off the inside 3 manifold by the rack and cut off the flanges,took the "straight " off the three and then welded back on the flanges ..would that work??

Exactly what I did!

[brian325i]

If u take off the inside 3 manifold by the rack and cut off the flanges,took the "straight " off the three and then welded back on the flanges ..would that work??

Exactly what I did!

really..i didnt read about it i just thought that would be my first approach..im well chuffed with that guess so..hows does the down pipe fair out then or did u just go custom from downpipes back

thanks mr moooooore..

[Brianmoooore]

I chopped the standard 325 system just in front of the mounting bracket at the back of the gearbox, and then, using bends and bits of pipe from the discarded front part of the 325 system, and the same from a 320 E36 system, basically filled in the gap.
Thought it would take days, but did it all from start to finish in an afternoon!

[brian325i]

thanks thats everything covered.Now just have to do it

[brian325i]

i have an engine plug from an e34 in my hand that i got from my local scrappy.

the list i had created from all web info is

E34 M50 Tu E30

1/ blue/white (oil level, dynamic) . 2/ green/yellow
2/ blue/yellow(oil level static) . 10/ blue
3/ red/white (ABS supply) . 20/ red/yellow
4/ black/blue (aircon)
5/ black/grey (aircon)
6/ purple/grey (aircon)
7/ black/purple (drive away sigle for E34 OBC)
8/ grey (engine fault) . 12/ grey
9/ NC
10/ NC
11/ brown/yellow (water temp)
12/ brown/purple (water temp) . 4/ brown/purple
13/ green/purple (fuel pump) . 13/ green/purple
14/ black/white (speed to inst. cluster) . 14/ black/white
15/ black/green (unloader relay) . 15/ black/green
16/ white/yellow (Rx data)
17/ white/purple (Tx data)
18/ black/yellow (starter) . 18/ black/yellow
19/ white/green (SI. reset) . 11/ white/green
20/ black (engine speed to cluster) . 9/ black
21/ Green (ignition) . 7/ green
22/ green/white . 6/ green/white
23/ brown/grey (oil pressure) . 5/ brown/green
24/ white/black ( fuel rate to cluster) . 8/ white black
25/ blue (ignition light) . 1/ blue.
.

but in this plug there is only 10 wires..and only a few of the colours match up..

How many wires should be connected in total from converting an e30 318is to m50b25?

is this plug i have no good?

[Brianmoooore]

That's my list you have there.
Ten wires seems to be about three below the minimum by my reckoning!
Bit confused as to why you have bought an E34 engine plug. Your E34 engine loom should have one of these, and you are going to cut it off and throw it away to fit an E30 plug in its place!
What age and model of E34 is this off, and what are the ten pin numbers and the wire colours?

[brian325i]

E34 egine will come with its engine loom and plug.. i am making an adaptor ..one end will have e34 car plug other side will have e30 engine plug...

the 34 car side plug will plug into engine and the e30 engine side will plug into the e30 car loom...

,ake sense?? i thought that is how most done it??

[Brianmoooore]

In that case you have bought an E34 SOCKET! If I don't get accurate information, I can't give accurate advice!!
This is a very poor way of wiring the car, and more suited to US conversions.
Cut eighteen inches of cable complete with plug off the end of a E30 engine loom, fit a 25mm cable gland to the corner of the E34 engine loom wiring box nearest the fusebox, fit the E30 loom section in through the gland leaving about six inches of loom and the plug outside, so that it will curve around and fit into the C101 socket.
Open up the wiring box, cut off the E34 plug and pull it and the end of its loom out, then connect all the relevant E34 wires to the E30 wires inside the wiring box, using soldered joints and heat shrink sleeving.

[brian325i]

right so that will be the new plan ,

the benefit of doing it the way you said is that it is neater, with just a normal e30 plug and socket.Compared to the e34 plug and socket and e30 plug and socket the way i said.

So open the black plastic casing with all the wires, remove the e34 plug and its wires, connect the 13 or so wires needed to an e30 engine plug making sure the pin numbers are right , solder and heat shrink them , then put back into the plastic case and itll look like factory finish, and plug and socket will be in original place.Is there a specific engine plug i need to use, that would be more suited i mean.

Thanks for your help and i will try and give accurate info in the future

ps why is the way i had panned more suited to us conversion,, just out of curiosity

also how did ye find out what to do originally?Lot of wire tests and sweat or what?

[eko]

^ Brian,as mr moore says,do it that way!
I thought about doing mine the same way you were planning,making an adapter but was also advised against it.
Im more than happy with the way mine looks,i used an M40 wiring cover on mine and the plug matches up perfectly with the car loom,no excess wiring is on show!