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02-03-2008, 11:56 AM | #1 |
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I just thought of no lsd in a new way..
OK, some of us believe the lsd should be offered as an option in this car. The "E-diff" system uses existing components such as the brakes and wheel speed sensors.. so adding software to control wheel spin is very cheap for BMW to incorporate. I'm very tired of people who buy sporty cars like this purely for status telling those of us who actually buy them for sporty driving that we don't need a mechanical lsd. That's BS. Many manufacturers offer lsd's on cars (and trucks) for $500-1000 option. For example, you can add an optional rear lsd to a new porsche turbo for only $950.
With that said, there are two reasons why it isn't *too* bad: 1) At least BMW gave us larger 4 piston rear brakes that can handle the role of working during braking AND acceleration. This is the only model with fixed calipers and 6/4 piston brakes. 2) At least BMW offers free brake pads during the maintenance period. The E-diff will wear the rear pads faster but at least BMW is willing to replace them for free. Are these points valid or am I fooling myself? |
02-03-2008, 05:38 PM | #3 | |
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Do you know if the pads on the rear of the 135 are larger than those on the back of the 335? Number of pistons, or the fact that the calipers are fixed, have nothing to do with braking "strength" or heat capacity by themselves. |
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02-03-2008, 10:26 PM | #4 | |
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02-04-2008, 09:31 AM | #5 | |
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You're point about the Porsche Turbo is takin but give credit where credit is due.. That a $120,000+++++ car.. there better be an option list the length of my arm.. lol... Atleast we can get the LSD if we really want it right? (Albiet.. $$$) |
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02-04-2008, 09:48 AM | #6 |
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Many sports cars less than $120,000 have the option of a LSD. In fact even GT's. My 2005 G35 has an optional LSD (a viscous one, but still a LSD). It's not uncommon at all. Electronics are nice and I have zero experience with the BMW nannies, but a mechanical LSD is very nice to have, not just on a track. I know that in the snow, a LSD makes driving much better.
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02-04-2008, 12:00 PM | #7 | |
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02-04-2008, 06:13 PM | #9 | |
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Of course.. I was just making a reference from the op's satement about the 911.. I have a 350Z with the VLSD, which i think kinda blows but you're right, it's far better then not having one at all.. and yeah even on the street.. all this snow about.. having it is a good thing.. lol |
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02-22-2008, 01:03 AM | #11 |
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Absolutely
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02-22-2008, 06:05 AM | #13 |
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02-22-2008, 06:17 AM | #14 |
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No need to disable E-diff. Advevo our friendly European BMW racer has done this and there is no problem. And yes, I am very keen to change the final ratio as well as I don't need a top speed any faster than 250kmh!
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02-22-2008, 09:16 AM | #16 |
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Might want to drive the cars first, before planning on plopping down a few thousand in mods, to see if you need an aftermarket diff first...
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02-22-2008, 01:08 PM | #17 | |
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I'm going for Performance Gearing I've heard/read a lot of good things about the great customer service, and I think working with a US based company would be easier (logistically) than one based out of the UK. And I've written Jim Blanton about the concern about the electronic nannies, and he assured my the LSD would kick in long before the nannies would detect that any wheel spin was occuring.
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02-22-2008, 04:59 PM | #18 |
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That's a good point, but technically the e-diff is flawed. It relies on braking one wheel while not transferring the torque to the other wheel. That mean you are wasting some of the torque which just turns to heat. Also, on the track, this would mean wearing out your brakes sooner. Both of which doesn't sound appealing to me.
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02-22-2008, 05:00 PM | #19 | |
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02-23-2008, 03:09 PM | #20 | |
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02-23-2008, 03:16 PM | #21 | ||
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Regarding your comment about the torque... Here's a quote from the BMW internal technical doc that Rook posted: Quote:
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02-23-2008, 03:48 PM | #22 | |
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