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Built motor: Fueling and knock issues resolved
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06-14-2022, 07:29 AM | #1 |
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Built motor: Fueling and knock issues resolved
I posted a while back, running into some superknocking and what appeared to be false knock issues, thought I'd share what the issue was.
We had hit a limit with the tuning around the fueling. The trims were bad, but when more fuel was added, superknocking occurred. This was fixed when I replaced my old generation 1 split second controller and PI fuel injectors with a new set of Bosch driven by a Reflex flex fuel setup. Trims are great, hitting around 29psi now with no issues at all. False knock was addressed with the adjustable pentiometers below. I spent a fair amount of time figuring out the "sweet spot" between not getting false knock and not getting the code that the knock sensor was having an issue (which happens if you push the pentiometers too far), also, I wanted the greatest amount of knock sensor muffling possibl, while not causing the knock sensor code to be thrown. So, I'll save anyone with a built motor (closed deck block especally) and say, put it around 40%. Now my only issue seems to be hitting the limit of the PS2 high flow turbos... which I'll live with for quite a while; the car is an absolutely beast and I couldn't be much happier, can hardly wait to get it dyno'd! With the AWD it's quite a rocket... https://www.amazon.com/dp/B07P5MWYMB...roduct_details Latest Log: https://datazap.me/u/terryeaton/log-...og=0&data=3-21
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2010 335XI, Carillo Steel rods, JE pistons, Closed Deck, Stage 4 race heads, 6mt, Pure Stage 2 High Flows, B58 Coils, VRSF|Vu Brothers (Ft Worth, TX)|JSRTuning,
https://youtube.com/channel/UC_kL3RvFSGv9QmTVt6787gg Last edited by Quick335XI; 06-17-2022 at 10:02 AM.. |
06-14-2022, 11:55 AM | #2 | |
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Drives: Single Turbo N54 on Meth!
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Who did you head work? Can't wait to see the dyno!
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06-14-2022, 02:12 PM | #3 | |
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now I'm like, oh man my turbos are limiting me I need biggers ones or a Single! Lol j/k. I'm going to enjoy this for a while...
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2010 335XI, Carillo Steel rods, JE pistons, Closed Deck, Stage 4 race heads, 6mt, Pure Stage 2 High Flows, B58 Coils, VRSF|Vu Brothers (Ft Worth, TX)|JSRTuning,
https://youtube.com/channel/UC_kL3RvFSGv9QmTVt6787gg |
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Torgus3791.00 |
06-14-2022, 04:05 PM | #4 | |
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I just modified some donor sensors, need to get this in the car this week... |
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Torgus3791.00 |
06-14-2022, 04:10 PM | #5 |
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Keep us posted! Yeah this was a big challenge. My understanding is the forged pistons and esp the closed deck block cause alot of fake noise, and I have both of those so... Jake at Motiv told me, these will reduce most of the "false" knock but still let real knock thru, so that's good. I was getting like up to -8 timing pulls before these went on. I'm at almost all 0's now. And I know i'm not getting actual knock... plugs are clean as a whistle, fueling and everything is on point, etc.
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2010 335XI, Carillo Steel rods, JE pistons, Closed Deck, Stage 4 race heads, 6mt, Pure Stage 2 High Flows, B58 Coils, VRSF|Vu Brothers (Ft Worth, TX)|JSRTuning,
https://youtube.com/channel/UC_kL3RvFSGv9QmTVt6787gg |
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lightmanek116.50 |
06-14-2022, 04:21 PM | #6 | |
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06-15-2022, 08:27 AM | #7 |
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2010 335XI, Carillo Steel rods, JE pistons, Closed Deck, Stage 4 race heads, 6mt, Pure Stage 2 High Flows, B58 Coils, VRSF|Vu Brothers (Ft Worth, TX)|JSRTuning,
https://youtube.com/channel/UC_kL3RvFSGv9QmTVt6787gg |
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06-16-2022, 03:01 AM | #8 |
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That log looks great .. those WGDC lines are beautiful. Salute to the tuning it's impressive. Your fueling looks amazing also. Did you do a build post or anything, or is this secret sauce ? FWIW very well done sir, in my opinion.
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06-17-2022, 10:00 AM | #9 | |
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As for tuning, I feel bad because Jon Russell JSRtuning did the tuning and he got sent in a wild goose chase for like six MONTHS trying to find out why the car wouldn't tune ... Trims were always way off, timing pulls, and I'd get superknocking if he tried to add more fuel theru the PI. Anyway it got to the point where I was like dang, maybe it's the PI injectors, they're generation 1 split second controller and 3 year old injectors, that was like the last thing we could possibly think of we hadn't tried. Long switched me over to Reflex and a flex fuel setup a month or so ago with new Bosch injectors. Jon got the tuning where it is now in that log in like four tries.... No sweat. Yea car is quite an animal esp with the AWD! First is scary fast lol. Sadly, I had shoulder surgery yesterday and won't be able to drive a manual for a good 3-4 weeks As SOON as I can... She's going on the dunl 💪 Last edited by Quick335XI; 06-17-2022 at 10:07 AM.. |
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Torgus3791.00 lightmanek116.50 |
06-19-2022, 11:22 PM | #12 |
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great success.
https://www.spoolstreet.com/threads/n54-false-knock-solved-in-tuning-even-for-built-closed-deck-motors.8363/ |
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lightmanek116.50 |
06-30-2022, 11:15 AM | #13 | |
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2010 335XI, Carillo Steel rods, JE pistons, Closed Deck, Stage 4 race heads, 6mt, Pure Stage 2 High Flows, B58 Coils, VRSF|Vu Brothers (Ft Worth, TX)|JSRTuning,
https://youtube.com/channel/UC_kL3RvFSGv9QmTVt6787gg |
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06-30-2022, 11:59 AM | #14 | |
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2010 335ix - speedtech, 6466g2, cams, ported head, closed deck, forged pistons/rods, 7.5in hd ic, jb4, pi, bpm4, dual 535s w/ external fpr and return, upgraded 6hp21+cooler, pr coils
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06-30-2022, 01:25 PM | #15 |
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I called to set up a dyno appt and they were booked out til mid-august
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2010 335XI, Carillo Steel rods, JE pistons, Closed Deck, Stage 4 race heads, 6mt, Pure Stage 2 High Flows, B58 Coils, VRSF|Vu Brothers (Ft Worth, TX)|JSRTuning,
https://youtube.com/channel/UC_kL3RvFSGv9QmTVt6787gg |
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