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3.91 final drive gearing and revs at speeds...
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06-11-2018, 09:55 AM | #1 |
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3.91 final drive gearing and revs at speeds...
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06-11-2018, 11:31 AM | #2 | |
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06-11-2018, 12:23 PM | #4 |
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Great wheel very high quality and well made I purchased from eBay. Took about a month to arrive I offered $190 and was accepted with $70 shipping. So $260 on eBay delivered, and I’m pretty sure there’s a guy reselling them on here for like $500. https://www.ebay.com/itm/BMW-E90-E91...-/112894906677 I added a carbon overlay to cover my peeling sport wheel trim. I also got that off eBay paid about $80 for that. So I’m like $340 into the wheel set up pictured above. |
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06-11-2018, 12:26 PM | #5 | |
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Sent that diff to M Factory (Synchrotech pm’ed on this forum) and they rebuilt it, swapped the 3 bolt pinion flange to the 4 bolt I needed, and installed a Helical LSD. Great service from them they had it turned around in 48 hours. Last edited by Biginboca; 06-11-2018 at 12:35 PM.. |
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06-11-2018, 12:41 PM | #6 | |
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06-11-2018, 12:53 PM | #7 | |
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It only costs like $60 and took like 1 hour to stitch on. Need to remove the wheel to stictch properly I missed a few stitches so it wasn’t perfect but looked and felt really great. Can’t fault the material or fit at all just my install errors bugged me. Also the Xuji wrap fattened up the stock sport wheel nicely, better result than a swapped M3 wheel IMO! |
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gT-BMW203.00 |
06-11-2018, 01:22 PM | #8 | |
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What you are showing is not a true speed. Your speedo is lying. If you have any coding capabilities, enable digital speedometer and do "true speed". True speed will match GPS speed. Analog display overstates the speed ("to keep you safe") by about 5-7%. So, you will have to go about 95 to be truly at 90. |
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Biginboca3763.50 desertman1232213.50 |
06-11-2018, 01:34 PM | #9 | |
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06-11-2018, 04:36 PM | #10 | |
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06-11-2018, 04:44 PM | #11 | |
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Last edited by Biginboca; 06-11-2018 at 05:11 PM.. |
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06-11-2018, 06:07 PM | #13 | |
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It’s interesting how sharp the creases are in the body lines of the e92. The Porsche has a much more organic look with soft corners, I like the razor sharp creases better. Last edited by Biginboca; 06-11-2018 at 06:25 PM.. |
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06-12-2018, 07:46 AM | #14 |
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06-12-2018, 01:19 PM | #15 |
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Drives: E92 328i 6MT ///M
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Thanks for taking that 90mph pic for yours truly.
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06-12-2018, 03:42 PM | #16 |
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06-13-2018, 10:38 PM | #17 |
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Can you record any acceleration runs with the tach/speedo?
I love how aggressive this is
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06-14-2018, 09:25 AM | #18 |
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Just curious. How short is 1st gear now? I just did a 3.73 swap from 3.15 and first is laughably short now. I don't really mind it though. Well worth it IMO.
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06-14-2018, 09:47 AM | #19 | |
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I don’t notice much difference in those gears really, but third gear I’m seeing a bit of a noticeable drop it tops out just under 90 on my speedo and used to be like 94mph. These are comparing 3.73 and 3.91 (not from stock 3.23) |
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06-14-2018, 09:54 AM | #20 |
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06-14-2018, 10:09 AM | #21 | ||
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My 2008 128i - Sparkling Graphite/Beige - Sport pkg - 6MT - Click me!
Parents' 2014 528i - Mineral White/Ivory White - fully loaded Instagram @Andreys_128i and @Honda.Bito Last edited by desertman123; 06-14-2018 at 10:21 AM.. |
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06-14-2018, 11:12 AM | #22 |
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desertman123 thanks for posting that. That seems about right on.
My redline is 7500 so I’m seeing a bit more speed in each gear than those figures also my rear tire specs at 25.6” diameter so I get a little bump on speed in each gear over what that shows. |
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