S50 vs S52

[slvrXI]

Why is there such differences in power from these two engines. Just recently purchased MRoadster with S52, What needs to be swapped to match the S50 performance? I mean come on... 320hp vs 240hp. Thats ridiculous...

[Philip81193]

The S50 doesn't make that much power. It's the same amount as the S52. The S52, however, has more torque. You're thinking of the S54. (E46 M3 engine)

[Dricebrug]

You're referring to the S50B32, which was not available in the United States. There is not much difference in the US s52 and s50. about .2 liters and a manifold.

Swap on the M50 manifold and put in software.

[mipktb]

The S50 was never U.S. available in the M Roadster.

IIRC, 1998-2000 M Roadsters and M Coupes had the S52 derived from the E36 M3.

2000-2002 M Roadsters and M Coupes had the S54 derived from the E46 M3.

[BIMMERIZED]

Correct me if I'm wrong but I have been told that its easy mod the s50 in some ways??

[mipktb]

Correct me if I'm wrong but I have been told that its easy mod the s50 in some ways??

Yes, in relation to the S52 (which came in the 96-99 M3), the S50 is easier to modify.

The S50 carries On-Board Diagnostics v. I while the S52 carries On-Board Diagnostics v. II. This means the S50 does not have the numerous emissions equipment pieces that the S52 does, making it easier to tune and work on (less engine bay clutter).

However, the S52 carries more displacement and a slight torque difference. Many owners convert the S52 to On-Board Diagnostics v. I when they begin modifying it.

But in general, BMW motors are more difficult to modify than other performance motors, like an LS1 from the Camaro or EJ motor series from the WRX.

[slvrXI]

What increase would I get out of the M50 manifold? Does it have Individual throttles?

The S50 doesn't make that much power. It's the same amount as the S52. The S52, however, has more torque. You're thinking of the S54. (E46 M3 engine)

S50 is rated at 320@7200

[Eryan36]

What increase would I get out of the M50 manifold? Does it have Individual throttles?



S50 is rated at 320@7200

No..it's not. The US spec S50 is 240, S52 is 240. The Euro spec S50 is 286, S52 is 320. The US and Euro spec S54 is 333 +/-.

The US S52 with the M/S50 manifold is a good mod. Sharking it afterwards is better. E36 US motors do not have ITB.

[slvrXI]

No..it's not. The US spec S50 is 240, S52 is 240. The Euro spec S50 is 286, S52 is 320. The US and Euro spec S54 is 333 +/-.

The US S52 with the M/S50 manifold is a good mod. Sharking it afterwards is better. E36 US motors do not have ITB.

ADSKFJHLA i cant trust wikipedia for anything!!!

quotes from wiki....

"The European-spec model is fitted with the 321-hp (DIN) S50 B32 powerplant, as used in the European version of the E36 M3. North American-spec M roadsters utilize the 240-hp (SAE) S52 engine, as found in the North American iteration of the E36 M3."

and

"Unique to the S52 is a bore of 86.4 mm and stroke of 89.6 mm for a total displacement of 3,152cc. The engine is rated at 240 hp (SAE) at 6,000 rpm and 236 lb/ft of torque at 3,800 rpm.

However, the S50 B32 incorporates the following special features to allow it to produce an impressive 321 hp (DIN) at 7,400 rpm and 258 lb/ft of torque at 3,250 rpm"


So... who's lying.

[Eryan36]

Well, gee, I wonder..

[GMCSK8ER]

No one's lying, you're just not getting it. The US S50 is called a S50US, really it's a variation of the M50 (e36 325) motor and came in the 1995 M3. The US S52 is a variation of the M52 (e36 328) motor that came in the 96-99 M3 and 98-02 M Coupes & Roadsters. The S50B32 is the euro engine w/ 3.2 liters, ITBs and more hp.

[shaeff]

OMFG. Dude, listen to the people who are posting in this thread.

[Dricebrug]

s50b32 and s50 are two different motors.

[RiCoZM3]

Euro

S50b30 :282-322bhp (M3-R,M3-Gt,M3 CSL, M3 LTW & M3-Euro Spec Canadian Edition)
S50b32 :321 bhp (M3-GT2, etc...)

US:

S50 : 240 hp/225 tq
S52 : 240 hp/235 tq

[eurocarturboit]

E36 M3 US & Europe: 1993 to 1997*
Model Euro 3.0 M3 US 3.0 M3 3.2 M3 Evo US 3.2 M3 3.2 LTW
Engine Inline-6 Inline-6 Inline-6 Inline-6 Inline-6
Quoted bhp 286 240 321 240 240
0-30 mph (sec) 2.5 2.3 2.2 N/A N/A
0-60 mph (sec) 5.6 6.4*** 5.3 5.9 5.3
0-100 mph (sec) 13.5 16.0*** 12.0 15.5 14.0
0-120 mph (sec) 20.0 N/A 18.5 N/A N/A
1/4 mile (sec/mph) 14.0 @ 101 14.6 @ 97 13.8 @ 104 14.5 @ 98 13.9 @ 100
Maximum mph 155** 137 158 137 137
Overall mpg 24/26 Imp 24/25 US 23/25 Imp 22/24 US 21/23 US
Curb Weight (lbs/kg) 3,344/1,520 3,230/1,468 3,236/1,471 3,170/1,441 2,950/1,341
Source
Bentley Publishers

*Average of independent magazine sources. US residents, multiply by 1.2 if you want to convert an Imperial mpg result into US mpg.
**Timed by Autocar at 162 mph with European (155mph limiter)
*** Car & Driver ran both their routine and extended (35,000) mile 3-liter M3s through their test procedures and returned much quicker results than most. The average figures quoted are fairer for the private buyer's expectations today, but for the record, C&D recorded 0–60 mph in 5.5 seconds in both sessions. They recorded 0–100 mph in 14.6 seconds and 14.2 seconds at 98- or 99-mph terminal speeds for the standing 1/4 miles. Car & Driver ran an automatic-transmission 3-liter M3 through the strip procedures and returned 0–30 mph in 2.6 seconds, 0–60 mph in 6.7 seconds, 0–100 mph in 17.1 seconds, and a 15.3-sec/95-mph ;-mile pass. Both top speed (137 mph) and average fuel consumption (24 US mpg) were reportedly unaffected. Curb weight was up 72 lbs, at a reported 3,304 lbs.

[Alpine6And7]

ADSKFJHLA i cant trust wikipedia for anything!!!

quotes from wiki....

"The European-spec model is fitted with the 321-hp (DIN) S50 B32 powerplant, as used in the European version of the E36 M3. North American-spec M roadsters utilize the 240-hp (SAE) S52 engine, as found in the North American iteration of the E36 M3."

and

"Unique to the S52 is a bore of 86.4 mm and stroke of 89.6 mm for a total displacement of 3,152cc. The engine is rated at 240 hp (SAE) at 6,000 rpm and 236 lb/ft of torque at 3,800 rpm.

However, the S50 B32 incorporates the following special features to allow it to produce an impressive 321 hp (DIN) at 7,400 rpm and 258 lb/ft of torque at 3,250 rpm"


So... who's lying.

your comparing apples to strawberries! EURO and AMERICAN got completely different powerplant

[chadwick405]

LOL at this, who you going believe the people that actual own these cars or the guy with the 325's and wiki, haha.

[langley]

I thought wiki explains it pretty clear.

[mipktb]

Why is there such differences in power from these two engines. Just recently purchased MRoadster with S52, What needs to be swapped to match the S50 performance? I mean come on... 320hp vs 240hp. Thats ridiculous...

What increase would I get out of the M50 manifold? Does it have Individual throttles?



S50 is rated at 320@7200

ADSKFJHLA i cant trust wikipedia for anything!!!

quotes from wiki....

"The European-spec model is fitted with the 321-hp (DIN) S50 B32 powerplant, as used in the European version of the E36 M3. North American-spec M roadsters utilize the 240-hp (SAE) S52 engine, as found in the North American iteration of the E36 M3."

and

"Unique to the S52 is a bore of 86.4 mm and stroke of 89.6 mm for a total displacement of 3,152cc. The engine is rated at 240 hp (SAE) at 6,000 rpm and 236 lb/ft of torque at 3,800 rpm.

However, the S50 B32 incorporates the following special features to allow it to produce an impressive 321 hp (DIN) at 7,400 rpm and 258 lb/ft of torque at 3,250 rpm"


So... who's lying.

[tokbandit]

[Bimmer325]

This thread has become seriously complex for its title lol

[brandonmatthew]

You read wiki wrong, it specifically says the us (s50b30) got a 240 hp version while the euro (s50b32) got 320 hp

[Turbovulc]

Can confirm from "over here"
M3 Engines here in europe (s50 family) is a completely different story than the m50-m52 engines, the confusion is obvious when the name s52 comes along in the us m3...

We are not anly talking a "bit more displacement" here, the engine is completely different. The head for example in the eur s50 is very refined with solid lifters and much bigger valves, cams, separate itbs, and for most engineworkers cant do much more than damage to these heads when trying to make more horsepower from them. :-)

Check out realoem.com for details.

[Braymond141]

God damnit you all suck at engine codes. Either use them right or not at all.

The US got (Canada/Germany/Japan/etc also got the US spec)
S50B30US - 240bhp
S52B32US - 240bhp

The European market got
S50B30 - 286bhp
S50B32 - 321bhp

Anytime you guys sit there and say "S50, S52" you're leaving too much room for interpretation... just say the full damn code.

[triggrhaapi]

God damnit you all suck at engine codes. Either use them right or not at all.

The US got (Canada/Germany/Japan/etc also got the US spec)
S50B30US - 240bhp
S52B32US - 240bhp

The European market got
S50B30 - 286bhp
S50B32 - 321bhp

Anytime you guys sit there and say "S50, S52" you're leaving too much room for interpretation... just say the full damn code.

Since when is your car LSB? I remember it being black when I went to get my block from you.