nj1266

iTrader: (6)

I was comparing the stock boost map in ECUflash to the stock boost map in Access Tuner Race. There is something that confused me and I would hope someone can clarify it.

In ECUflash the BTEL tables at 4000 rpm reads 155 at WOT, the BCLO table reads 80, the reactive solenoid is at 100 and the passive solenoid is at 55. The ECU calculates boost/load target by adding BCLO to BTEL. In our case, 155+80=235 boost/load target. That usually give 22.xx psi at 4000 rpm at sea level.

Now let us look at the ATR.

The ATR stock map (Installed_Stock_Mode_GSRv101) sets the target load table (BTEL in ECUflash) at 248 at 4000 rpm at WOT, the Boost Control Offset (BCLO in ECUflash) table is set at 80, the Fine Wastegate Duty Cycle (reactive in ECUflash) @ 78, and the Coarse Wastegate Duty Cycle (passive in ECUflash) @ 43.

1. Why are there differences between the two? Isn't this supposed to be the same stock map?

2. Is the Cobb map using lower WGDC (coarse and fine) to compensate for the higher load target, ie, 248+80=328? It is not possible for a stock EVO X to hit that load number. We know that when the logged load is lower than the target load, the ECU will add up to 10% WGDC. So Cobb lowers the actual duty cycle to compensate for the 10%.

Does anyone have an explantion for the differences between the two stock boost maps?

tephra

iTrader: (6)

my guess is the software is just presenting different numbers to you... if you logged both ROM's (using the same logger) then you would probably see the same numbers (give or take a little bit)

GST Motorsports

iTrader: (8)

Their software displays it wrong. I've told them a millions times already, even while beta testing....

nj1266

iTrader: (6)

Do you believe that the boost target is set too high in their OTS maps? I have seen 250 load + 100 Offset = 350 target boost on their Stage 2 93 octane map with a drop-in. Is that actually the target? Or is the software dispaying the info wrong?

BTW, did you get my PM

HB Speed

iTrader: (1)

just subtract 32 from thier values to get ecuflash values

nj1266

iTrader: (6)

Can you elaborate? Subtract 32 from which values? Can you give an example?

HB Speed

iTrader: (1)

take a look@ stock maps in ATR and Ecuflash and it will be quite apparent
Cobb has thier ways about doing things, i just let them do it and adapt.