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06-21-2007, 03:51 PM | #67 | |
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Have you guys seen the bedplate crank design? Beautiful....this allows much higher revs in addition to oversquaring the engine. The short of it is BMW has made a conscience decision to pursue lightweight drivetrain designs and high revs...... We are going to see the next M cars become superlight weight with about the same power.
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06-21-2007, 04:14 PM | #68 | |
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06-21-2007, 04:28 PM | #69 | |
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ON the S54: The bore: 87 mm Stroke: 91 mm So it is a over bore design or undersquare |
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06-21-2007, 04:33 PM | #70 | |
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06-21-2007, 04:46 PM | #71 | |
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Over/under square
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M54 - 86.4 bore x 89.6 stroke; B/S = 0.96 S54 - 87 bore x 91 stroke; B/S = 0.96 S65 - 92 bore x 75.2 stroke; B/S = 1.22
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06-21-2007, 04:52 PM | #72 |
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Yes , the other engine that has over bore design is the USM3 3.2liter OBD2 (model year 1996-1999). Not to find mistake on your post, but was it M52 not M54?
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06-21-2007, 05:25 PM | #73 |
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Well, I was comparing to the M54, but the S50 in the euro E36 M3 had the same bore/stroke specs, I believe. The later S52 went from 3.0 to 3.2 liters.
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Greg Lake Oswego, Oregon, USA 2023 M2 Coupe - Brooklyn Grey/Cognac/CF, 6MT; 2020 MB GLE 450 Last edited by GregW / Oregon; 06-21-2007 at 05:40 PM.. |
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06-21-2007, 05:43 PM | #74 | |
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The 1995 US M3 3 liter OBD1 engine has 86mm (bore) x 85.8mm (stroke) 1996-1999 US M3 3.2 liter OBD2 86.4 x 89.6 |
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06-21-2007, 06:57 PM | #75 |
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06-21-2007, 10:02 PM | #76 |
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Yep, I messed up. I did drive it and I thought it had a slushbox. I just remember a handful.
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06-21-2007, 10:14 PM | #77 | |
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06-21-2007, 10:17 PM | #78 | |
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06-21-2007, 10:20 PM | #79 |
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06-21-2007, 11:51 PM | #80 |
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06-21-2007, 11:55 PM | #81 |
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Torque
Excuse me, you've just short-torqued the S54 by 1 ft. lb.; 262 is spec. Not that I'm obsessing over statistics, mind you!
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Greg Lake Oswego, Oregon, USA 2023 M2 Coupe - Brooklyn Grey/Cognac/CF, 6MT; 2020 MB GLE 450 Last edited by GregW / Oregon; 06-23-2007 at 04:00 PM.. |
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06-22-2007, 10:02 AM | #83 |
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06-22-2007, 08:43 PM | #84 | |
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+1,000 I also read the article. btw..e39m5 V8 made ~345 lb TQ |
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06-22-2007, 10:34 PM | #85 |
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E39 M5
Well, that engine was 4.94 liters. Extra displacement usually produces a lot more torque, as does a longer stroke. These are the figures I got from one source: 400 bhp / 298 KW @ 6600 rpm Torque 500 Nm / 369 ft lbs @ 3800 rpm
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Greg Lake Oswego, Oregon, USA 2023 M2 Coupe - Brooklyn Grey/Cognac/CF, 6MT; 2020 MB GLE 450 Last edited by GregW / Oregon; 06-23-2007 at 04:01 PM.. |
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06-23-2007, 09:55 PM | #86 | |
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Did I miss something, or are people still trying to compare grandpa's 335 to the new M3? |
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06-23-2007, 10:13 PM | #87 |
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M3 comparisons
Well, everything is up for comaprison, I guess. Less torque or not, the new M3 will kick serious butt on both the 335 and E39 M5. All great cars; whatever rings your bell.
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06-24-2007, 08:47 PM | #88 |
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