10-31-2020, 08:12 PM | #45 | |
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10-31-2020, 10:41 PM | #46 |
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Yup car is stock, has MPE but I doubt that makes any difference at all.
And yes this was with 93 octane. I have some dashcam footage of all 3 runs so if I get some time I'll upload them.
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10-31-2020, 11:01 PM | #47 |
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Mad respect for the B58. 12.0s stock. You probably have the fastest stock M340i around!!!
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11-01-2020, 10:02 AM | #48 |
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12.0 stock is nice! With a JB+ probably looking at mid 11s?
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11-01-2020, 04:05 PM | #50 |
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Um, no. You don't drop 4-5 tenths in a 1/4 with an extra 30-40hp in a 3900lb car. You might squeek out an 11.8-9 in good DA. Might. Lets be reasonable here, you can notice a difference and you may put a car on someone you otherwise would tie but no miracles will happen with only a JB+.
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AA catless downpipe (offroad only of course) BMS intake and Inlet tube H&R Springs MHD Stage 2 E40 |
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11-04-2020, 11:21 AM | #51 | |
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11-07-2020, 05:48 AM | #52 | |
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11-07-2020, 07:27 AM | #53 |
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You should be able to. I run 3.5gallons E85 topped up with 93 octane for a full tank on my G20 330i. No issues so far. I keep it just under E30 to be safe.
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11-07-2020, 09:59 AM | #54 |
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You can run e30 fine. Tuned you can run e50 no problem (that's what I'm running now). Dinan actually has a tune they are developing on full e85. Apparently the hp fuel pump on this engine is better then the previous version and more capable of supporting e85 and higher hp levels. According to my tuner the ecu can detect the ethanol level of the fuel and adjust accordingly.
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11-08-2020, 10:13 AM | #55 | |
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11-08-2020, 11:17 AM | #56 |
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The new B58TU and B46 have upgraded HPFPs (the same pumps as in the Supra which are popular upgrades for the 340i/440i with the older B58). So you can run fuel with more ethanol than you did in your 440i.
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11-12-2020, 08:09 PM | #57 |
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Just ordered my JB +
"BMS B48/B58 JB+ M140/M240/340/440/230/330"/ It didn't list m340 is it the same unit ? |
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11-12-2020, 08:17 PM | #58 |
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Same unit. Works with the B46/48/58 engines.
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11-12-2020, 08:19 PM | #59 |
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Got it
Hopefully I get an additional 20whp |
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11-12-2020, 08:20 PM | #60 |
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Hehe should be (much) more than 20whp on the M340i!
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11-12-2020, 11:26 PM | #61 |
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11-12-2020, 11:32 PM | #62 |
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Can't wait!
I'll keep it on the mild setting for the time being. Just to get a feel for it. |
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11-13-2020, 09:21 PM | #63 |
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11-14-2020, 03:52 PM | #64 |
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Would be nice to see a JB+ on a dyno - for comparison here are some results for the JB4 on the Fuel-It! Z4 M40i (I thought I had already shared them here but it was another thread)
Fuel-iT full results and original post here: https://f30.bimmerpost.com/forums/sh....php?t=1692979 Chenry cliff notes version below: JB4 91 octane downpipe (don't know catted or not but it wouldn't matter much either way) BMS intake Map 1: +28 wheel horsepower vs stock wheel horsepower* Map 2: +35 wheel horsepower vs stock wheel horsepower* JB4 EWG connector E85 added to 91 to achieve E42 downpipe (don't know catted or not but it wouldn't matter much either way) BMS intake Fuel-IT flex fuel sensor IAT Spoofing to bump timing a couple degrees +90 wheel horsepower vs stock wheel horsepower *Note: comments are they were "taking it easy" because of 91 fuel and +50 is achievable under similar circumstances (and I agree with this based on what I've seen on the supra forums on 93) Last edited by chenry; 11-14-2020 at 04:12 PM.. |
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11-23-2020, 02:49 PM | #65 | |
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wow. very impressive... I am sure that is more LINEAR 28-34 hp on JB4, and more impressively, 60/90 TQ increase on map 1 / 2! And no, i haven't seen any M340i JB+ dyno yet. So it would be great. However, it isn't too hard to tell the added power with it. For me, 200 well spent. What do you think of a JB4 with 91 crap so cal gas, NO downpipe? Bad idea? No track time, no drag races for me... Just everyday driving. Would a hard tune like MP be better for that money? They are about the same (600-700 range) |
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11-23-2020, 03:01 PM | #66 | |
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in my opinion there is no such thing as a "hard" tune unless you as the user decides to make it a "hard" tune MP from the reviews and what others say is always good so id take an MP stage 2 tune over a jb4 or any plug n play tune anyday
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