I know that the whole S52 vs. S50 swap questions have been beat into the ground, however, I still have one question...I understand the argument that S52 swaps require aprox. $1-2K more due to OBDI conversion, but have more power potential over the S50. My question is exactly how much more potential does the 3.2L have? I plan on doing no-more modding than perhaps: cams,chip,clutch,light/w flywheel,and i/h/e. Aprox. how much additional power would an S52 make if identically modded to an S50?
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With real world dyno numbers, the S52 pulls by a good bit on the standard S50 us motor. You'd figure it would with a .2 litre displacement bump. There's a lot more S52's out there, as the motor was in production until 2000 I believe in the M roadster/coupe, vs just one production year for the s50. The ability to find a lower mileage motor alone makes the cost of the OBDI swap worth it, the power jump is an added sweetener.
-CharlieSwing wild, brake later, don't apologize.
'89 324d, '76 02, '98 318ti, '03 Z4, '07 MCS, '07 F800s - Bonafide BMW elitist prick.FYYFF -
No!
95 m3 all the way!!!!!!
3.0 MAKE MORE POWA :)
NASA MidSouth TT Director / GTS2 #018
Mods: Coastal PS Fluid, 10w40 Oil
Future Mods: Bosch Micro-Edge Wiper Blades, Painter's Tape, Spark Plugs, Freezer for Nutty Buddys, Adam Nitti CD'sComment
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i've also heard that when comparing things like bone stock 0-60 and 1/4 mile times for a 1995 vs later M3's, the rear-end gearing was changed on the later models, making them a little quicker. I plan on using the stock E30 325 tranny for the swap, so I'm just looking for the best engine setup for the money.Comment
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Wasn't the 1999-2000 s52 double vanos like the m52? I think the only useable s52s were 1996-1998... still- thats 3 years vs 1 year of the s50.Originally posted by Charlie
My oppinion: If you buy the engine barebones (no ecu, wiring, maf, etc) you'll save some good money- put that to good use in the form of a stand alone fuel management system. SDSefi is cheap, but it wont control the vanos (it'll still run fine without the vanos motor hooked up.) If you were willing to do a little trial and error- you could get megasquirt to run your engine, and the vanos- if my car werent my daily driver i'd be playing with that instead of sds.
the great thing about MS- you can use the stock triggerwheel and crank pos. sensor, and output ignition signals to individual coil packs (such as ford edis), you'd still have an output available for the vanos control.
Standalone doesnt have to be expensive- with SDSefi you're looking at about 1400 to get setup, with ms you're looking at about $600 with ignition control. Truthfully i'm starting to wonder why I did SDS over ms... oh well. Both of those prices beats $200 on an ecu, $200 on a wiring harness, $360 on new ignition coils, $300 for a euro maf and $400+ for a custom aa chip.
FYI- SDSefi fit on an m20 e30 (bone stock) quickened the 0-60 by a little over a second.
Doing something M50 related? -> http://www.addissimo.com
On Myspace? ->http://groups.myspace.com/r3vlimited
BF2142 SN = BillyGooseComment
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No, all US S52's are single vanos.Originally posted by Addissimo'91 318is
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So they only changed the m52s?Originally posted by Brew
Doing something M50 related? -> http://www.addissimo.com
On Myspace? ->http://groups.myspace.com/r3vlimited
BF2142 SN = BillyGooseComment
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Geee, this sounds familiar to the conversation last weekend.Originally posted by Charlie
Originally posted by Skafrog
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Yeah, the M52tu was all aluminum and dual vanos.Originally posted by Addissimo'91 318is
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S50 is better in my opinion, you can make alot more power for alot less $$. yes the 3.2's do have more potential but in order to unlock that potentiall you literally have to spend double what you would on mods than a S50. plus IMO S50 sounds much better, much more ferrari like on the high end. Also S50 is easier to run straight pipes and etc, check engien lights almost never come up.
all USA spec E36 engines were single vanos except the 92 325 motor which did NOT have vanos.Last edited by Budget Beater; 10-15-2005, 09:47 PM.Comment
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Originally posted by Budget Beater
INTERNEEEEEEEEETTTTT!!!!!!!!!!
The S52 makes more power, period. As has already been discussed, you're going to be going to an OBDI swap to make this thing work with less hassle in an e30. This cost is offset by the fact that you have a much larger pool of S52's to choose from. Since you're going to be running OBDI anyway, check engine lights become a non-issue.
-CharlieSwing wild, brake later, don't apologize.'89 324d, '76 02, '98 318ti, '03 Z4, '07 MCS, '07 F800s - Bonafide BMW elitist prick.FYYFFComment
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Listening to someone in the same room as you about these engine swaps who has done more than he can count > reading on the intraw3b.
ebay-budget master, take Charlie's posts to note.Comment
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What about aftermarket cam kits? With the S50 you can go out and buy a Conforti cam kit, make 260whp and be done with it. With an OBDI S52 wouldn't you have to get a custom tune?Originally posted by CharlieLast edited by Kilomph; 07-08-2006, 05:54 PM.Comment
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When you convert a s52 to OBD1 you have all the greatness (almost) of a s50 except you have about 30 more hp at the crank..........my engine of choice would be the s50 though .......oh yeah and i have owned s50 and s52 e36's.
Also the Obd2 M3's have a 3.23 compared to a 3.15 , because obd2 M3's are heavier ( ask me and i will tell you 3 or more ways )Comment
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Like Charlie said, go with the larger motor. The 3.2 has a bigger bore (albeit not by much), pistons with less friction, almost 4mm more stroke, refined intake ports, lighter valvetrain....why wouldn't it make more power?
They pull a lot harder in the 2000-3500 area too, which is nice around town.
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