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BMW 3-Series (E90 E92) Forum
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Progman 29.2 Superseded/Dinan flash fries ECU
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06-16-2008, 11:13 AM | #45 |
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Get yourself a boost gauge. This way you'll see the entire time if your butt dyno lie
I ordered a RixEffects Gauge Pod from the group Buy. I don't want to go to a Dyno to verify my tune and butt impressions. A gauge is the best and most practical route. I will install it pronto.
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E92 335 | Space Gray | Saddle Brown Dakota | Dark Burl Trim | ZPP | ZSP | AT | Idrive | 6FL | FBO | Dinan CAI | Quaife LSD | STG3 PROCede.
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06-16-2008, 11:22 AM | #46 |
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06-16-2008, 11:58 AM | #48 | |
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But I do have an auterra dynoscan which, amongst other parameters, measures boost pressure by tapping into the ECU via the OBD II port. Unfortunately, I did not take any data from the pre-29.2 Stage 2 because I didn't have it at that time. But I did get some data from 29.2 in stock form, which held stady at a measured 8.6 psi of boost from 2K until around 6K, which seems normal. I'll hook up the dynoscan to test the stage 2 on 29.2 tonight or tomorrow, brought my other car to work today. Hopefully it will show that the car is making more or less the 13 psi as advertised by Dinan for stage 2. There are other ECU paramaters in addition to boost pressure that can be logged, like relative and absolute load values, throttle position, fuel rail pressure. Maybe something interesting will show up in the data. |
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06-17-2008, 09:31 AM | #49 | |
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Oh cool, glad you have the Auterra. I had one for my WRX and it was GREAT. Keep us posted with your Dinan findings when you scan it. Interestingly, that 8.6 lbs of pressure from 2k upwards (stock) seems right. Driving the car, there is certainly no way you would assume it was making max boost anywhere south of 3k. |
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06-17-2008, 04:47 PM | #50 |
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OK, hooked my auterra up to the car today. As you will see in the attached data logs, the boost pressure I'm reading with my supposed stage 2 flash is 8.6 PSI, same as stock. If the data is correct, this leads me to believe that:
1) Dinan flash never "stuck" 2) Dinan flash was overwritten by ECU after successful flash (pure speculation on my part, but I suppose possible as I did not measure boost the day I left the Dinan delaer) Maybe the root cause of the unsuccessful flash is incompatibility with 29.2? I can't think of anything else right now. On the way back from the dealer, I thought the stage 2 flash was in there because the boost lag was better than 29.2 stock, but now maybe the improvement was due to 29.2 adapting, as others have stated, and not the Dinan flash. What a mess! At least I was able to confirm that the extra boost is nowhere to be found. Will be calling Dinan shortly... |
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06-17-2008, 05:03 PM | #51 | |
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06-17-2008, 08:02 PM | #52 |
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no doubt. I must delay oil change as long as possible
![]() ![]() please let us know what your PA/Dinan rep says.
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06-17-2008, 09:55 PM | #53 | |
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06-17-2008, 10:26 PM | #54 | |
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But in looking at the logs, I believe the Flash is there and DINAN is taking a different programming approach to this tune. The fact that it goes to 8.6 and not 8.5 or 8.7 (or close) suggests a cap as the A/D and sensor resolution is more than enough to discern 100 mV. They may be limiting boost recognition and adjusting duty cycle to increase the boost. However, and if so, this limits some of the advantages which I hope I am incorrect. |
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06-17-2008, 10:46 PM | #55 |
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dude you can hear the turbo's with the AT6 stage 2 REV 3 flash. you could never hear the turbos before the flash. little turbo's at high rpm's make that distinct noise
![]() ![]() Am i the only one to hear them? maybe i have younger ears ![]()
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06-17-2008, 10:48 PM | #56 | |
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Or it could be just stock. Curious theory, though.
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06-17-2008, 10:50 PM | #57 |
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06-17-2008, 10:57 PM | #58 |
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Unknown and pure hypothesis at this point. It could even be a limitation with the conversion in the Auterra software. I hope they would not limit to about 8 bit resolution though. My OBDII software does discern to about 12 bit resolution so it shouldn't be in the DME. The DME will report better than a tenth of a PSI resolution. If not, they are running 8 bit A/D which is not impossible, just unlikely. Even if they were, you would see some A/D chatter.
![]() I dunno as it doesn't really concern me. But thought I would drop in a comment just out of pure curiosity. |
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06-17-2008, 11:22 PM | #59 | |
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06-17-2008, 11:24 PM | #60 |
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06-17-2008, 11:50 PM | #61 | |
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I might just have to get that boost gauge installed after all if I can't be sure auterra is reading correctly. Will probably cost me a pretty penny at neiman marcus when the wife sees the boost gauge, though, as she multiplies times 3 when figuring my invested car cash into her real life spend. $2K for the Dinan flash for me multiplied all the way up to a brand new living room for her ![]() |
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06-18-2008, 10:56 AM | #62 | |
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Keep us posted man! |
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