M50 to m52 swap

[tjhartge]

S52 cams go into M52
S50 cams go into M52
S50 cams go into M50

S52 cams do not go into M50.

The cam trays are slightly different. So unless you switch to M/S52 cam trays you cannot run S52 cams in an M50.

so will the s50 cams really fit into the m52 without changing the cam trays to m/s52 trays?

how about swapping the m50 head with the m52 head? direct fit or possibly with mods?

cheers

[FredK]

Is it as simple as bolting all the m50 electronics onto an m52? What about the ecu? Do I need to track down a m52 ecu? I know the temperature sensor is trickey on s52s will I have to tap the head on the m52 as well?

On early production m52, no tapping is required. Later production (not sure of actual supecession date), you will have to drill and tap.

You need a OBD-I DME. You cannot use the temperature splitting cable mentioned in that OBD-I writeup.

Look for vinnymac's writeup on bimmerforums E36 M3 section for a more detailed OBD-I conversion writeup.

[surebimmer]

http://homepage.mac.com/aceves/OBDI/OBD_ONE1.htm

[02stu]

Is it as simple as bolting all the m50 electronics onto an m52? What about the ecu? Do I need to track down a m52 ecu? I know the temperature sensor is trickey on s52s will I have to tap the head on the m52 as well?

[02stu]

Anyone know of any resources for an obd1 swap?

[FredK]

You offered incomplete information. It's not just remove and replace. If someone were to take your words at face value, they'd be in for a surprise if they just tried to remove and replace M50 cams with S52 cams.

[asubimmer]

S52 cams do not go into M50.

The cam trays are slightly different. So unless you switch to M/S52 cam trays you cannot run S52 cams in an M50.

lol funniest post ever. So they don't fit but they do?? hahaha

I'm aware of the tray differances, thanks. But like you said they DO fit.

[FredK]

S52 cams go into M52
S50 cams go into M52
S50 cams go into M50

S52 cams do not go into M50.

The cam trays are slightly different. So unless you switch to M/S52 cam trays you cannot run S52 cams in an M50.

[asubimmer]

you can put s52 cams in an m50 if you wanted. I have an exhaust s52 cam and am looking for a intake cam so I can put em in :)

[02stu]

Are there any complication with hooking the OBD1 wiring harness up the m52 block? Or is it just the top half that is difficult to swap over. Any one know of a good OBD 1 conversion right ups?
Thanks again

[RVA e30]

obd1 conversion on the M52 would be the way to go with some s52 cams

[amdspitfire]

do obd1 conversion on the m52, you can use a lot of parts from the m50. Dont forget s50/52 cams.

[surebimmer]

I think the OBD II S52/M52 manifold flow a little less the the cast M50/S50 But you save about 25-30lbs using them.

[smonkbmw]

what DME do you have already? if its a 413 you might be able to use it. i know nothing of head swaps between the 2 motors. i think you can use the m50 parts and swap all the obd1 items to the m52. and yes the m52 exhaust manifold is sought after for being free flowing, you only need to plug the extra o2 ports and fill in the channels between the cylinder ports.

[e30 gangsta]

obd 1 everything more power. Look for a vanos head drop some s50 cams in it. And rock it out!