[George @ BMS]

Originally Posted by bmw loe

Hey all, how do I know if I have Rev2? I see the JB4 I just received has a ground wire sticking out of the unit, not sure if that was for the BCM install piece? I didn't order a BCM module with the unit so wasn't sure if I needed to follow the BCM module because otherwise I would have 2 un-used sets of plugs vs just 1 set.

If you have a set of plugs that one is brown and one black that is the BCM connection and its a Rev2.

[bmw loe]

Thanks, looks like I have Rev 2, which is a nice surprise because I wasn't sure if I needed to purchase the BCM with it.

Re: the B9 capatibility, it was more a question for future resale in the event I need to sell since that platform seems to be more active with the product since the TTRS guys tend to go balls-to-the-wall with mods whereas i'm trying to maintain +2 or +3 psi of boost on 93 and still retain my warranty.

Quick question, on the latest firmware, how would I go about adding in the fuel pressure harness? I'm in FL, we have reliable e85 here that's consistently 80-90% ethanol all year around.

[George @ BMS]

Originally Posted by bmw loe

Thanks, looks like I have Rev 2, which is a nice surprise because I wasn't sure if I needed to purchase the BCM with it.

Re: the B9 capatibility, it was more a question for future resale in the event I need to sell since that platform seems to be more active with the product since the TTRS guys tend to go balls-to-the-wall with mods whereas i'm trying to maintain +2 or +3 psi of boost on 93 and still retain my warranty.

Quick question, on the latest firmware, how would I go about adding in the fuel pressure harness? I'm in FL, we have reliable e85 here that's consistently 80-90% ethanol all year around.

We recommend you only use up to E30 mix without the fuel plug connected. We dont include the chips on the board anymore neither so down the line if it gets sold to a B9 guy he cannot use the fuel plug. The plug is under the manifold so its a big job to get to on RS3.

[bmw loe]

gotcha, i'll leave that alone for now.

[bmw loe]

Just installed, 1st impression on Map 2 (93 octane e10 only), I haven't gone all out, but one of my biggest fears with piggyback systems is the rather hyper throttle response due to boost realignment, but the car feels natural in daily driving.

Install was easy, the OBDII cable is long enough to route along the drivers side and feed through the door area. I did this for EZ Uninstall in the event I need to.

I'll have to log soon to see if 93-only octane is happy with Map 2

[George @ BMS]

Originally Posted by bmw loe

Just installed, 1st impression on Map 2 (93 octane e10 only), I haven't gone all out, but one of my biggest fears with piggyback systems is the rather hyper throttle response due to boost realignment, but the car feels natural in daily driving.

Install was easy, the OBDII cable is long enough to route along the drivers side and feed through the door area. I did this for EZ Uninstall in the event I need to.

I'll have to log soon to see if 93-only octane is happy with Map 2

On 93 you can use map 3.

[bmw loe]

Originally Posted by George @ BMS

On 93 you can use map 3.

Thanks I'll try that out

[bmw loe]

Very happy with the performance with Map 2 thus far, everything feels OEM smooth but with more push. Surprising how much 3 psi makes a difference!

I'll try Map 3 and Map 4 over the weekend, maybe add 20% ethanol mix for Map 4, but Map 2 seems to be entertaining enough for me in how effortless it gathers speed.

edit, I switched over to map 4 with 23% ethanol (93/85), wow it moves! Even in 91F FL heat.

It did switch to Map 8 after I banged off the rev limiter for a few seconds in M mode, which I assume was programed to do so if it sensed strange boost oscillations. But flipped it right back to Map 4 and has been great since leaving it in DS or D mode.

Holy crap, it'll lay rubber down on all fours in Map 4 with 93/E85 @ E23%, very strong and I had a 10.8 second S5...

[kornsined]

Speaking of Map 8, what are the triggers for it to flip to that map? I was testing some launches with the new 034 tcu tune I installed and it triggered something to flip it. I was launching in map 2 and almost no knock detected before testing the launch.

[George @ BMS]

Originally Posted by kornsined

Speaking of Map 8, what are the triggers for it to flip to that map? I was testing some launches with the new 034 tcu tune I installed and it triggered something to flip it. I was launching in map 2 and almost no knock detected before testing the launch.

See what your Last safety value is. This value changes when the safety is used and shows last stored safety. Sometimes if LC is held for long its usually a lean trigger in first or second.

[kornsined]

Originally Posted by George @ BMS

See what your Last safety value is. This value changes when the safety is used and shows last stored safety. Sometimes if LC is held for long its usually a lean trigger in first or second.

You are correct. #2 AFR lean was stored. Never held more then 3 seconds on launch. I always wait to hear the turbo spool and then go. The 034 does use a higher launch rpm and some cold temps probably all factored into the scenario.

[George @ BMS]

Originally Posted by kornsined

You are correct. #2 AFR lean was stored. Never held more then 3 seconds on launch. I always wait to hear the turbo spool and then go. The 034 does use a higher launch rpm and some cold temps probably all factored into the scenario.

We will look into when time allows. The AFR safety is over sensitive on this firmware version and when the car is in max spool mode and the ECU runs it lean the JB4 does the autoswitch.

[bmw loe]

Looks like mine was #2 as well, which likely is because of bumping off tha rev limiter. Safety first, only triggered once and now I know what not to do to trigger it again, and it hasn't since :-) Loving the unit so far, and kept it on Map 4.

[bmw loe]

Some Map 5 with 93/E85 (approx 25% mix). I didn't realize that I was supposed to export the file each time I hit "F2" to stop logging, so this was my 8th run, with the prior having virtually 0 timing corrections on all cyl.

I'd like to eventually try a absolute map 6 @ 22psi soon, but so far this thing has massive mid-range.

I have some dragy times on Map 4 @ E20 (93/e85). Waiting for this E25 tank on Map 5 to go below 1/2 tank first and then i'll grab some times in FL-warm months.

I hope my fuel trims are okay? They seem to stay around 44 at wide-open

[George @ BMS]

Originally Posted by bmw loe

Some Map 5 with 93/E85 (approx 25% mix). I didn't realize that I was supposed to export the file each time I hit "F2" to stop logging, so this was my 8th run, with the prior having virtually 0 timing corrections on all cyl.

I'd like to eventually try a absolute map 6 @ 22psi soon, but so far this thing has massive mid-range.

I have some dragy times on Map 4 @ E20 (93/e85). Waiting for this E25 tank on Map 5 to go below 1/2 tank first and then i'll grab some times in FL-warm months.

I hope my fuel trims are okay? They seem to stay around 44 at wide-open

Trims are high but as long as AFR is stable its not a concern.

[t-800]

RS3 8Y with JB4 Map1 first launch and this was in the wet too......

[bmw loe]

I think I will need to trim down my E-content. Yesterday I filled up to E30, then it went into Map 8 safe mode for AFR lean. I tried it again on E29, E28, E27, it happens during an aggressive downshift with kickdown, but will run 100% fine at side open throttle after resetting it.

I'll post a log soon, but I want to capture a log that triggered the safe mode. My trims are still maxing at 44. I think I'll have to dial it back to E25-E26, my particular ECU/software combination doesn't like higher E-content, BUT FL has been known to have some spicy E85 where it's more E90-E95 content so perhaps that could be it, which I can test soon.

I should have known from past experiences to just use enough ethanol to clean up the ignition timing and not go overboard, so user error here I'm sure

side note, my car was flashed to the latest Audi software last week due to an outstanding TSB during some warranty work. Perhaps the latest OEM software dialed back trim thresholds?

[tegxsi]

I haven't run Jb4 in a while but i think a lean spool occasionally kicks it into safety.

[bmw loe]

I think I figured it out

I tried it today again and it may be related to the traction control system, one press vs long press. It appears the one press creates this during fuel cut when spinning, but I was able to go wide open downshifting with kickdown without issues on the long press to fully disable everything. I was able to do this 4 or 5 times in each case and was able to replicate it each time between both modes thus far.

I hope this was the issue, unless it was fueling and the trims stabilized with miles. At any rate, I'm waiting for the tank to go down more so I can do dragy runs, this thing is amazing on Map 5 otherwise. I personally cannot phathom having anything quicker than this, and I haven't messed with a custom Map 6 yet to see if I can do + 9.5 psi across the board since my ECU target is rather low here at sea level. Everything feels 100% OEM otherwise so 150% satisfied with this unit, especially after reading through pages of low boost issues and it now being resolved.

[bmw loe]

Originally Posted by t-800

Attachment 106493

RS3 8Y with JB4 Map1 first launch and this was in the wet too......

NIce! and very awesome that the Jb4 works on the new platform

[bmw loe]

Originally Posted by bmw loe

I think I figured it out

I tried it today again and it may be related to the traction control system, one press vs long press. It appears the one press creates this during fuel cut when spinning, but I was able to go wide open downshifting with kickdown without issues on the long press to fully disable everything. I was able to do this 4 or 5 times in each case and was able to replicate it each time between both modes thus far.

I hope this was the issue, unless it was fueling and the trims stabilized with miles. At any rate, I'm waiting for the tank to go down more so I can do dragy runs, this thing is amazing on Map 5 otherwise. I personally cannot phathom having anything quicker than this, and I haven't messed with a custom Map 6 yet to see if I can do + 9.5 psi across the board since my ECU target is rather low here at sea level. Everything feels 100% OEM otherwise so 150% satisfied with this unit, especially after reading through pages of low boost issues and it now being resolved.

So it's definitely tied to wheelspin, yesterday I hit a patch of damp roads and it ended up doing the same thing.

[bmw loe]

Originally Posted by tegxsi

I haven't run Jb4 in a while but i think a lean spool occasionally kicks it into safety.

definitely seems like what it is

[bmw loe]

update, my safe-mode issue hasn't reappeared, I did a custom map 6 ramping up to +6.5psi using "20%" ethanold fuel. Trims stay under 40, closer to a value of 37 which is keeping everything in check. Doesn't feel any slower than Map 5 to be honest with its +7.5psi so it's a nice compromise for me.