Is it worth the trouble to swap in an S52 w/134K to my 1995 M3 with 100K on the S50??

[PITT M3 RR]

It's that simple of a question. I put the car up for sale, but if it doesnt move with in the month I need to get cracking on it to be ready by spring.

I am nearing the end of gathering all the parts I've wanted for my car and I have an s52 here in that pile.

My S50 has 100K, is running very strong and pulls hard. If I swap in the S52 in place of the S50, will I notice ground breaking power or what? Whats the pros of this swap? Theres alot of OBD1'ing an s52 96-99 car on the net, but not much of putting the S52 into the 95 chassis. (same results I suppose)

For the record the S52 has 134K miles, a few more than my S50.

SO convince me either way. I have the turner water temp harness in my shopping cart on the web site. I want to know more.

[l1ttlej7]

No

[PITT M3 RR]

[RRSperry]

Not unless the S50 is broke. And then you are putting a engine with more unknown miles in there.


If I were to do it, I'd pull the pan, check the bearings, replace the oil pump and pickup at a minimum. Or in reality, if I had to do it. I'd rebuild the S52, then slap the supercharge on it. I mean it is .2L bigger...

But no, you won't feel an earth changing difference. In fact, it will fell like it's a bit slower revving on the top end. (due to the more over square design of the S50 vs S52)

[KnudsonsM3]

keep the s50 if its still running well. If it isnt broken, dont fix it.

[adstock]

Does your S50 have updated retainers?

[pMak26]

Remove S50, replace with S54

[PITT M3 RR]

No the S50 isnt broken, It was stock when I bought it, so Im assuming nothing has been revised. Its a 5/95 build date.

The S52 was from a 97 auto, tranny is still on even. I got it from a weisco piston rep at his house, not a rando who wanted to meet at a neutral point.

After seeing this, if it doesnt sell, I will probably just throw the 6 speed in with everthing else to drive it while I build or refresh the s52. I just want the best motor I have access to in the car.

[CMG]

So you want to sell the car but if you don't you're going to dump more money into it? Kinda opposite ends of the spectrum.

[PITT M3 RR]

So you want to sell the car but if you don't you're going to dump more money into it? Kinda opposite ends of the spectrum.

Yea that's pretty much it. Bought it w/ big plans. Then almost tripled my incone and now i want into an E46M again. Over the last 8 months though I've been saving parts, close to 6K worth and I look at it like this. Dumping 6K into an 8K car doesnt make a 14K dollar 1995 vehicle. So if I can sell the car for 8 and the parts for 6 I can gain that income back and toss it toward an E46. I won't give the stuff away though, so if I dont find buyers, I want the best E36 I can make, so here I am.

[gk325is]

Remove S50 sell it and s52, replace with S54

[Amuro Ray]

No.

[stolo17]

Remove S50, replace with S54

in a few years I am hoping to pick up a project M and do this

[PITT M3 RR]

in a few years I am hoping to pick up a project M and do this

Until there's a definitive how to, it's out of the question as a "wing it" swap. For me anyway.

[Butters Stoch]

Spend the $ on F/I.

http://forums.bimmerforums.com/forum....php?t=1919596

[PITT M3 RR]

May be irrelevant fellas, have a guy driving in from Philly tomorrow to pick up the M and potential buyer for the motor.

[KnudsonsM3]

Talk about a pointless thread.