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View Full Version : Whats the difference between m50's?


Jase
08-02-2004, 01:59 PM
I know some people have swapped m50's into their e30s. What i am wondering is what is the difference between a 92 525i m50 and the 92 325i m50.Also are the 5 series the same in other years as the 3 series? I know the oilpain is differnt but is their power differences or intake ect?. I figured if they are the same then why not swap in the 5 series engine and save changing the oil pan.
Jase

Lethal ///M3
08-02-2004, 03:37 PM
The engines between those models are essentially the same. However, there is a rather large difference between the 92 model year M50 and the 93 model year M50, as the 93 M50 had Vanos and therefore was coded as the M50TU, TU = "technical upgrade", where as the 92 M50 did not have Vanos.

Jordan
08-02-2004, 04:45 PM
The major reason no one uses the e34 M50 for swaps is simple.

Think of how a e36 325i is driven, and then think of how a e34 525i is driven. Which one do you suppose winds up totaled more often?

Jase
08-02-2004, 10:57 PM
Originally posted by Jordan
The major reason no one uses the e34 M50 for swaps is simple.

Think of how a e36 325i is driven, and then think of how a e34 525i is driven. Which one do you suppose winds up totaled more often?

haha

never thought of it that way:idea:

so i guess there is no difference in the intake or any thing?

thinair
08-03-2004, 10:53 AM
Originally posted by Jase
I know some people have swapped m50's into their e30s. What i am wondering is what is the difference between a 92 525i m50 and the 92 325i m50.Also are the 5 series the same in other years as the 3 series? I know the oilpain is differnt but is their power differences or intake ect?. I figured if they are the same then why not swap in the 5 series engine and save changing the oil pan.
Jase

From what I know, the only reall difference between the 91-92 525i and 92 325i M50 motors is the oil pan shape, I think.

Regarding the intake, the airbox is different, but everything from the throttle body to the head is identical, and I believe the HFM is the same too, but the boot shape might be different between the HFM and the TB.

And yes, in 93 is when the Vanos started, and they reverted back to single valve springs with narrower valve stems.