03-04-2018, 02:11 PM | #23 |
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Pits if you ever manage to use e85 in 50i with proper flash (backend or not) - please let us know. I'm interested to see how much can be extracted with that approach. I know there are options to swap turbos from X5M (they are a bit bigger), and even put aftermarket a lot bigger ones (pure turbos or some other brands), but that is $$$ so I'm just observing and waiting if someone will try it
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03-04-2018, 02:25 PM | #24 | |
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03-04-2018, 02:33 PM | #25 | |
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03-04-2018, 10:23 PM | #26 |
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Why haven't you done a tank of e30 with your tune? There are a few spots in the valley. It would perform better that the 93 octane although you would lose mpg. I think you would really get an idea of what's the tune is capab of overall. I am hoping to do the flash in the next month on mine.
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03-05-2018, 12:49 AM | #27 | |
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Would be good if someone can give a quick 101 tune course |
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03-05-2018, 05:42 AM | #28 | |
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The problem with e85 is that it has about 30% less energy/btus than gasoline when comparing the same unit of measurement. In turn, a back end flash is strongly recommended as all the fuel scalar tables need to be adjusted if you're using a high % of e85. But if you are only using a small amount to help increase octane, the standard ecu logic can compensate. A few other notes, most standard gas is already blended with e85. And e85 is never full e85, you'll see a sticker on the pump saying the minimum % of e85 mix at the pump. I think some states allow e85 pump to be as low as 51% e85(especially winter blend) and the rest is crappy 87. Lots to learn but those are the basics Last edited by pits200; 03-05-2018 at 11:01 AM.. |
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03-05-2018, 12:37 PM | #29 | |
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Mixing it is the tricky part but there are apps that help with the process. I think I downloaded something like e85 calculator that will tell you how many gallons of 91 you would want to mix with e85. I think the stations in the valley have changed back from their e56 blend to true e85. Therefore mixing your 91 with e85 to equal an e30 mix probably amounts to 5 gallons of e85 in our SAVs. Dont quote me though. If you mix, allow gas to mix for 10 min or so to get old gas out of the line Since your 93 flash tune isnt a "true" e30 tune, you shouldnt see too much difference from the 93 you just ran. It will be significantly cheaper though. Hopefully that helps a bit. Your vid of running around 3.5 0-60 is nuts. Really looking forward to getting that flash soon. |
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03-05-2018, 02:13 PM | #30 | |
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P.S. Yeah I like that 3.5sec too, but I don't want to give people false hope - if you look at my car right now - it has all seats removed and 1 Momo 20lbs seat bolted instead of driver seat. Muffler delete, lighter rims and tires - I mean I'm good 300 lbs lighter - and I only had 1/2 tank (that's like another 90 lbs off). I only drive like that while my enthusiast lasts - but my arse tells me to go back to soft seats so I'm not sure how long I will last like that. For me it was just an experiment to how far I can push 50i. When normal people see inside of my x5 they think I'm crazy idiot who likes to destroy posh BMW SAV |
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03-05-2018, 03:37 PM | #31 | |
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03-05-2018, 04:08 PM | #32 | |
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2022 x5 m50i - Dravit grey
2005 evo 8 (current) built 2.3 488/409 mustang dyno Old stable mates - 87 325i, 88 m3, 90 m3, 97 m3 4dr, 04 325xi, 91 gmc Syclone, 08 335xi, and 13 x3 35i msp 2014 x5 50i msport |
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03-05-2018, 06:02 PM | #33 | |
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I did lower the map to "4" and haven't thrown any codes yet. I'll get a cable and check the codes next week, and will report back. My thought is a failing coil as stated above, but the engine has never run rough even after throwing the code. Yes, in Denver we have 91. I try to use only the "top tier" gas, but I'm not sure how much difference that makes. I will say that I love the tune, it really wakes up the low/mid range acceleration and makes the X5 feel more sporty than stock. In my opinion, the tune feels more natural.smooth than the JB4 I've ran on my N54 cars.
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03-05-2018, 06:28 PM | #34 | |
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2022 x5 m50i - Dravit grey
2005 evo 8 (current) built 2.3 488/409 mustang dyno Old stable mates - 87 325i, 88 m3, 90 m3, 97 m3 4dr, 04 325xi, 91 gmc Syclone, 08 335xi, and 13 x3 35i msp 2014 x5 50i msport |
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03-05-2018, 11:07 PM | #35 |
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Maybe anyone local to me interested on a hook up price and free install so I can see what is going on?
I will need to test it and take a few pictures for Installation manual. PM if interested, gotta be local to me.
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03-06-2018, 04:19 AM | #36 |
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Ben I would be all over that if I was local , thats a great deal , money off the product and a free install!!
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2022 x5 m50i - Dravit grey
2005 evo 8 (current) built 2.3 488/409 mustang dyno Old stable mates - 87 325i, 88 m3, 90 m3, 97 m3 4dr, 04 325xi, 91 gmc Syclone, 08 335xi, and 13 x3 35i msp 2014 x5 50i msport |
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03-14-2018, 09:34 AM | #37 |
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OP here, so I tried reading the codes through V-Link with both Auto Doctor and BimmerCode, neither show any fault codes. From my previous experience with other BMWs, the fault codes are stored in the DME and you can still read them even if the CEL is not currently lit.
Any ideas?
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03-14-2018, 11:50 AM | #38 | |
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But, do you mind sharing your installation pictures?
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03-16-2018, 10:36 AM | #39 |
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I didn't take any pictures. I can in a few months when I have to remove it for service.
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03-16-2018, 04:23 PM | #40 | |
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2022 x5 m50i - Dravit grey
2005 evo 8 (current) built 2.3 488/409 mustang dyno Old stable mates - 87 325i, 88 m3, 90 m3, 97 m3 4dr, 04 325xi, 91 gmc Syclone, 08 335xi, and 13 x3 35i msp 2014 x5 50i msport |
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