DIY: In depth M52/S52 OBD2 swap

[craiggroves91]

This is a great write up! Awesome info!

What do all you OBDII guys do for the diagnostic port?

What exactly are you asking?
How to mount it?

I bought something similar to this, works fine and real cheap.
http://www.ebay.com/itm/BMW-20pin-Co...d37cbc&vxp=mtr

I might need to get one of those!

[maniacmatt]

What exactly are you asking?
How to mount it?

I mean the universal OBDII connector usually found under the dash on OBDII cars. Like this.



How and where are you guys wiring and mounting it?

[craiggroves91]

I mean the universal OBDII connector usually found under the dash on OBDII cars. Like this.



How and where are you guys wiring and mounting it?

I thought thats what you might be asking. Well I didn't have it wired it, but I'm sure its possible and not crazy hard. It's more simple to just used the one in the engine bay though

[maniacmatt]

Another question. For those running the M50 intake manifold. What throttle body do you pair with it? OBDI or OBDII? Or does it matter and why?

Thanks again.

[craiggroves91]

Another question. For those running the M50 intake manifold. What throttle body do you pair with it? OBDI or OBDII? Or does it matter and why?

Thanks again.

That depends mainly on what conversion kit you get I believe. The kit I got from m50manifold.com comes with new custom throttle body gasket that allows you to use the OBD2 TB on the M50 manifold.
I believe it is also fairly easy to run the obd1 TB.

There is TONS and TONS of info about m50 manifold conversions. Quick google search will give you any answer you need

[e30serg]

Nice thread! I see you're in the SF bay too....are going to get t BAR'ed?

[ZekeTheSneak]

I want to hear your completed exhaust soon, I want to go the same route

[craiggroves91]

Nice thread! I see you're in the SF bay too....are going to get t BAR'ed?

It's not BAR'able at the moment

I want to hear your completed exhaust soon, I want to go the same route

There are videos on my build thread.
It sounds awesome! Better in person than the vids

[mtlbloodshot]

I found out that this worked awhile ago and since I have contacts in VW/AUDI, I got this brake booster and MC for dirt cheap. It bolts right up to the firewall. 2 bolts instead of 4 in a cross pattern. It holds perfectly.

All that needs to be done is cut the AUDI brake booster push rod and rethread the E30 clevis. Here how it looks. This is my bay.

[FredK]

Looks great mtl. Is that a 25mm MC?

[craiggroves91]

I found out that this worked awhile ago and since I have contacts in VW/AUDI, I got this brake booster and MC for dirt cheap. It bolts right up to the firewall. 2 bolts instead of 4 in a cross pattern. It holds perfectly.

All that needs to be done is cut the AUDI brake booster push rod and rethread the E30 clevis. Here how it looks. This is my bay.

Curious as to how the pedal will feel

[Link]

Great write up.

[craiggroves91]

Great write up.

Thanks :)

[Mr.SWISS]

I found out that this worked awhile ago and since I have contacts in VW/AUDI, I got this brake booster and MC for dirt cheap. It bolts right up to the firewall. 2 bolts instead of 4 in a cross pattern. It holds perfectly.

All that needs to be done is cut the AUDI brake booster push rod and rethread the E30 clevis. Here how it looks. This is my bay.

Is that the A4 1.8T booster? I was going to go this route as well since you can use the res it includes instead of a remote res but the seller couldn't find the booster after I won the auction someone scrapped it!!

So I used a e32 dual chamber and MC.

[mtlbloodshot]

Is that the A4 1.8T booster? I was going to go this route as well since you can use the res it includes instead of a remote res but the seller couldn't find the booster after I won the auction someone scrapped it!!

So I used a e32 dual chamber and MC.

It is from a Audi A4 (b5). I was worried that the res was going to touch the TPS so I got a much smaller res ( in diameter ) but slightly taller.