Click to go to Forum Home Click to go to maXbimmer Home

Go Back   maXbimmer Forums > maXimum Tech > 3 Series > E30 (1983 - 1991)
User Name
Password


Welcome to Maxbimmer.com!

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

Reply
 
Thread Tools Rate Thread Display Modes
Old 01-04-2010, 09:33 AM   #1
airmanjay
1st Gear Newbie
 
Join Date: Mar 2009
Location: Brantford
Posts: 22
S50 M50 swap anyone?

My question is if anyone that has done this swap let me know about how they did it, using Zionsville? Difficulty doing the swap, worth it or not, does it change the weight ratio that much in driving, and the biggest thing reliability. Your imput would be greatly appreciated, since it is an option that I am looking into and would like all in information before i do it. thank you.
airmanjay is offline   Reply With Quote
Old 01-04-2010, 10:17 AM   #2
dannyb
4th Gear Member
 
Join Date: Apr 2008
Location: Gatineau Qc
Posts: 634
Im doing a m50 swap this winter, ill let know what i think about it after.
dannyb is offline   Reply With Quote
Old 01-04-2010, 10:19 AM   #3
richie_s999
6th Gear Member
 
Join Date: Sep 2008
Location: Oshawa
Posts: 4,537
talk to SamE30, he did the swap last year. Beleive he has a tonne of pics!
richie_s999 is offline   Reply With Quote
Old 01-04-2010, 11:12 AM   #4
T.Dot_E30
Classifieds Moderator
 
T.Dot_E30's Avatar
 
Join Date: Apr 2003
Location: T.Dot
Posts: 9,277
Spend a few days reading before asking questions start here:

http://www.r3vlimited.com/board/showthread.php?t=147862
and then here:
http://www.r3vlimited.com/board/showthread.php?t=45442


Here is a short bit of summary info:
Quote:
Basic FAQ:



How difficult is the swap?

On a scale of 1-10, 1 being an oil change and 10 being rebuilding a transmission, I’d give this somewhere around a 7 or 8, depending on how you go about it.


How much will it cost?

This can and will vary greatly from person to person. It’s possible to do this swap for $500 or less, or you can spend upwards of $10,000. I’d say count on $2k for a basic m50 swap and $5k for a well done s52 swap. These are very rough estimates. It can be done much cheaper or at a much higher cost. It depends if you buy new or used parts, do the labor yourself, etc…


What are the major basic required parts?

Engine: m50, m52, s50, s52, complete with wire harness, ECU, accessories.
E34 525i oil pan, oil pump, dipstick
E36 engine mount arms
E28 motor mounts
E34 throttle cable
E21 brake booster

These are only the basics, and some may be substituted for other parts. People find cheaper/better parts to use all the time, but the above listed are the common parts that the majority of people use.


What needs customized?

If you use an e30 325 transmission (Getrag 260), you’ll need to modify the transmission cross member and the shift linkage. Some welding experience is required for this, or you can purchase these parts from members of the r3vlimited.com forum who currently (as of 8/2009) produce them.

The e21 brake booster needs to have the shaft modified. It basically needs shortened, thinned down, and threaded. There are other ways to get the job done though.

Radiator hoses aren’t always a direct fit.

The wiring harness on the engine will need spliced into the body harness at the connector near the firewall.


How involved is the wiring?

There are about 15 wires that need connected. The best way to do this is look at the schematics and create a pin out chart. This process takes time and research, but isn’t physically hard to do. You don’t want to mess it up though, as you can heavily damage the wiring and components, or even start a fire. There are several companies that sell harness adaptors if you don’t want to mess with the wiring.

Most people get a spare body side plug from an e36/e34, as well as a spare engine side plug from an e30, and then splice these two parts together. This way, you aren’t hacking your cars harness or your engine harness.


__________________________________________________


How to read the wire diagrams:


Go here:

http://www.wedophones.com/BMWManualsLead.htm

Find the manual for your car or engine, whatever side you are doing pinouts for.

Open the manual, and skip to the section that starts talking about power distribution and various under hood parts.

This is what it will look like:





You want to look for any instance of either c101 or x20, such as what is circled. C101 is the e30 engine connector, x20 is the e36/e34 connector. So if you are looking at an e30 manual, just look for c101. When you look at the e36/e34 manual, look for x20.

The c101 connector is the big round connector on your firewall. It has 20 or so pins on it (it’s a square connector with less pins if you have an 84-85 model). Each pin will be drawn out in this manual. Here, in the example, we are looking at pin 10 (see the 10 next to where it says c101).

The curved lines show which way the signal is coming through the connector. In this example, you see it’s coming FROM the oil level sensor, TO the engine oil fault indicator (the oil level light in your car).

The VI/GN and BU/WT are the colors of the wires. The wire between the sensor and the connector is blue with a white stripe, the wire between the connector and the warning light is Violet with a green stripe.

The .5 next to the color is the wire size. Apparently this is in millimeters squared. .5 will be a little wire, .75 medium, 1 is big. (I think).

You now know what color the wire is on the engine side, what color t is on the body side, what pin it is in the connector, and what its function is.

The schematics are generally laid out as power (+12 volts) from the top of the pages, to ground at the bottom of the pages. Further details of what various symbols mean can be found in the beginning pages of the manuals.
__________________
T.Dot_E30 is offline   Reply With Quote
Old 01-04-2010, 04:07 PM   #5
e30_kid89
The Afro-stig
 
e30_kid89's Avatar
 
Join Date: Nov 2005
Location: TDot West End
Posts: 4,589
Send a message via MSN to e30_kid89
Wow....I can't believe people still ask what do i need? Has anybody done it?? It's kinda irritating...

/rant.
__________________
e30_kid89 is offline   Reply With Quote
Old 01-04-2010, 04:44 PM   #6
Dissembler
4th Gear Member
 
Dissembler's Avatar
 
Join Date: Apr 2009
Location: Oshawa
Posts: 655
If you can't research properly and need to ask "what do I need?", then you can't do it.

There are plenty of reputable shops who sponsor this site that would be more than happy to help you out.

Conversly, buy an e36 or e46. Bam, swap done.

And, as t.dot pointed out before, r3vlimited is THE place to go if you are infact serious about this.
Dissembler is offline   Reply With Quote
Old 01-04-2010, 10:34 PM   #7
Red_Rocket
2nd Gear Member
 
Red_Rocket's Avatar
 
Join Date: Aug 2007
Location: Shitby
Posts: 153
Hey, im in the same boat. I was wondering if anybody has tried to swap an M20 in a 325is. Id really like to get some know how to do this. Is there a big HP gain?
Red_Rocket is offline   Reply With Quote
Old 01-05-2010, 12:05 AM   #8
Dissembler
4th Gear Member
 
Dissembler's Avatar
 
Join Date: Apr 2009
Location: Oshawa
Posts: 655
Quote:
Originally Posted by Red_Rocket View Post
Hey, im in the same boat. I was wondering if anybody has tried to swap an M20 in a 325is. Id really like to get some know how to do this. Is there a big HP gain?
lol, seriously?

An e30 with the "325" designation already has an m20 in it...
Dissembler is offline   Reply With Quote
Old 01-05-2010, 12:22 AM   #9
craz azn
6th Gear Member
 
craz azn's Avatar
 
Join Date: Feb 2004
Location: Port Perry
Posts: 7,474
Send a message via MSN to craz azn
Quote:
Originally Posted by Dissembler View Post
lol, seriously?

An e30 with the "325" designation already has an m20 in it...
You fail at sarcasm.
__________________

Rippin' Proper | Youtube | Vimeo |
craz azn is offline   Reply With Quote
Old 01-05-2010, 12:30 AM   #10
e30_kid89
The Afro-stig
 
e30_kid89's Avatar
 
Join Date: Nov 2005
Location: TDot West End
Posts: 4,589
Send a message via MSN to e30_kid89
Quote:
Originally Posted by craz azn View Post
You fail at sarcasm.
LOOOOOOL

ok bye
__________________
e30_kid89 is offline   Reply With Quote
Old 01-05-2010, 12:46 AM   #11
Dissembler
4th Gear Member
 
Dissembler's Avatar
 
Join Date: Apr 2009
Location: Oshawa
Posts: 655
Quote:
Originally Posted by craz azn View Post
You fail at sarcasm.
I was being sarcastic? Wasn't trying to be.

Last edited by Dissembler; 01-05-2010 at 12:50 AM.
Dissembler is offline   Reply With Quote
Old 01-05-2010, 12:49 AM   #12
El Gato Liso
6th Gear Member
 
El Gato Liso's Avatar
 
Join Date: May 2007
Location: Brampton
Posts: 3,092
^^^ fail to cover up the fail fail
__________________
R.I.P. E30
El Gato Liso is offline   Reply With Quote
Old 01-05-2010, 12:51 AM   #13
richie_s999
6th Gear Member
 
Join Date: Sep 2008
Location: Oshawa
Posts: 4,537
Quote:
Originally Posted by Dissembler View Post
I was being sarcastic? Wasn't trying to be.
NO thats the scary part.....re read Devons post and think sarcasm....
richie_s999 is offline   Reply With Quote
Old 01-05-2010, 12:54 AM   #14
richie_s999
6th Gear Member
 
Join Date: Sep 2008
Location: Oshawa
Posts: 4,537
forget the M50, go M42!!!!!!!!!!!!!!!!!!!!
richie_s999 is offline   Reply With Quote
Old 01-05-2010, 01:02 AM   #15
Dissembler
4th Gear Member
 
Dissembler's Avatar
 
Join Date: Apr 2009
Location: Oshawa
Posts: 655
oh lol, i do fail

I thought that car in his pic look familiar, but theres so many red e30s on here its hard to tell.

Last edited by Dissembler; 01-05-2010 at 01:05 AM.
Dissembler is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 06:09 AM.


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.