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Diesel Tunes
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12-11-2010, 09:33 PM | #1 |
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Diesel Tunes
VAC or JBD? With all of this bickering between Mike and Shiv it just got me wondering what everyone's opinions were of the JBD by comparison with the VAC module. I guess Procede does not have a diesel tune out yet. So few options... It's kind of depressing really.
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12-11-2010, 09:53 PM | #3 |
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Mike while I am not surprised by your response, how does this whole knock issue translate over to a diesel engine? What is different about how the JDD works by comparison to the JB3 or JB4?
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12-11-2010, 11:10 PM | #4 |
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All diesels do is knock (if you are using the definition of knock from a gasoline engine). The fuel isn't injected until the air is compressed and superheated to create combustion (over simplified, I know pre-combustion chambers and all that are sometimes involved), there is no spark event.
I don't know how the JBD works, but the rules are very different from the gas engine spark induced combustion world, I am sure JBD is not controlling the fuel injection event so it won't be causing premature combustion (like early during compression thus damaging parts). Any time you make more power just by tricking a computer, or reprogramming you are at least going to be making more heat/higher cylinder pressures and more wear. |
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12-11-2010, 11:27 PM | #5 |
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Coming from dig domestic diesel world (not that I was a tuner or engine builder, but I certainly consider myself an educated consumer), I am amazed what these diesel engines will put up with. Some dimwitted tunes, with no supporting modifications and the engines respond well.....for longer then one would expect.
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12-11-2010, 11:41 PM | #6 |
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The diesel 335d is so very different! Unbelievable how many more things are monitored, heated, etc.
EGR coolers DEF tank heating on the active resevoir Heated fuel filter Electric booster heater on the HVAC due to diesels taking longer to warm up. 16.5:1 compression ratio. Many more switchover valves, filters, etc. Forged Connecting Rods, closed deck and reinforced block and lower girdle. Different Transmission, torque converter, rear end gear ratio, etc. I'm really surprised the MSRP on a diesel is only around $3500 more than the gas equivalent.
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2011 Alpine 335d M-Sport 12.34 @ 110.48mph
2019 i3s Terra, 2008 Black 335i Sedan. 11.11@ 129.47 mph 2008 Monaco Blue JB3 2.0 335i Coupe. 11.33 @ 132.77 mph, 60-130mph: 6.95 seconds 2023 i4 M50 11.48 @ 121.56mph, 3.43 0-60 (dragy) |
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12-12-2010, 03:22 AM | #7 |
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I would go with a reflash (Evolve, for instance).
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12-12-2010, 03:45 AM | #8 |
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JBD just above the middle setting.
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2011 Alpine 335d M-Sport 12.34 @ 110.48mph
2019 i3s Terra, 2008 Black 335i Sedan. 11.11@ 129.47 mph 2008 Monaco Blue JB3 2.0 335i Coupe. 11.33 @ 132.77 mph, 60-130mph: 6.95 seconds 2023 i4 M50 11.48 @ 121.56mph, 3.43 0-60 (dragy) |
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12-12-2010, 07:49 AM | #9 | |
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Thank you for the replies. Admittedly I am new to the world of diesel of engines, so this is all good information.
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12-12-2010, 07:52 AM | #10 |
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4.7! Damn dude, the last video I saw you running 5.2 seconds! So a couple of clicks of the dial and your acceleration improves .5 seconds!? Impressive to say the least.
Have you tried it in DS mode to see how your times compare to manual shifting? |
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12-12-2010, 09:33 AM | #11 |
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12-12-2010, 09:49 AM | #12 |
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12-12-2010, 10:17 AM | #13 | |
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So I ran again this morning. 2nd gear launch but let it shift by itself. Unlike my gas 335i, the 335d shifts before redline (fortunately!). Same temps, emptied my trunk, and switched from USA diesel to Union 76. 13.1 at 106.1 4.7 0-60, fighting wheel spin. Still just above the medium setting. Can't believe the fastest time on Dragtimes (by the same guy about 10 times) is around a 13flat. Maybe I be the first to break into 12's on that list.
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2011 Alpine 335d M-Sport 12.34 @ 110.48mph
2019 i3s Terra, 2008 Black 335i Sedan. 11.11@ 129.47 mph 2008 Monaco Blue JB3 2.0 335i Coupe. 11.33 @ 132.77 mph, 60-130mph: 6.95 seconds 2023 i4 M50 11.48 @ 121.56mph, 3.43 0-60 (dragy) |
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12-12-2010, 11:05 AM | #14 | |
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Very impressive! I've been running the JBD at 100% for several thousand miles and love it. Are you considering a LSD? |
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12-12-2010, 11:22 AM | #15 | |
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12-12-2010, 11:28 AM | #16 | |
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Manual mode 2nd gear launch, and all the 335 steptronics will shift by themselves before hitting a rev limiter, etc. Just the same as they down shift by themselves when you come to a stop.
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2011 Alpine 335d M-Sport 12.34 @ 110.48mph
2019 i3s Terra, 2008 Black 335i Sedan. 11.11@ 129.47 mph 2008 Monaco Blue JB3 2.0 335i Coupe. 11.33 @ 132.77 mph, 60-130mph: 6.95 seconds 2023 i4 M50 11.48 @ 121.56mph, 3.43 0-60 (dragy) |
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12-12-2010, 11:36 AM | #17 | |
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Did you also pick up the BT scan tool and have you run a diagnostic yet for shits and giggles to see if there are any internal codes being thrown that might not otherwise be showing up on your dash? |
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12-12-2010, 12:03 PM | #18 | |
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2011 Alpine 335d M-Sport 12.34 @ 110.48mph
2019 i3s Terra, 2008 Black 335i Sedan. 11.11@ 129.47 mph 2008 Monaco Blue JB3 2.0 335i Coupe. 11.33 @ 132.77 mph, 60-130mph: 6.95 seconds 2023 i4 M50 11.48 @ 121.56mph, 3.43 0-60 (dragy) |
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12-12-2010, 12:07 PM | #19 | |
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I had a few unidefinable shadow codes but no SES. |
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12-12-2010, 12:56 PM | #20 |
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Hotrod, have you tried 60-130 mph times? It would be really interesting to compare to my friends' 335d times (one with some kind of box, another - Evolve reflash).
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12-12-2010, 01:14 PM | #21 |
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12-14-2010, 03:20 PM | #22 |
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Yep, they are real
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Mods: RB turbos, JB4, BMS DCI, Scoops, Forge DVs, ar design catless DPs, Milltek exhaust system, Helix FMIC, Quaife LSD, VK MotorWerks OC Kit, Bilstein B16 PSS10
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