So who wants their ECU's "Chromed"?

[Zybrainn]

Decided to just buy a pre-built harness.

[Jeff V.]

@jeff... Talked with Von, instead of a knock box we are going too read raw knock voltage at the knock sensor (o-scope) for calibration. This will isolate the ecu hardware to determine what changes if any the ecu hardware makes on the interpretation of the sensor and the resultant tune. The hope is to "qualify" or "certify" certain ecus.

That's a great idea, but I was actually talking about logging the raw, baseline parameter right from the ADC on the chip, before it's passed through the software filters to look for 'knock'.

If two different ECUs report the same knock raw at given operating conditions, that means the electronics are identical, no?

[Patryn]

For adjusting injector scaling, is there any way to get ECUflash to put in the exact number or is the only fine adjustment via the latency tables. I'm trying to enter 770, but values are only 776, 757, or 796 when entering numbers in the 770 range.

[Jeff V.]

There's pre-defined 'steps' to the injector scaling, and just about everything else in the code.

I can explain it if anyone is curious. But to avoid cluttering up the thread for now, I'll just say it's something you have to live with. Being off by 3-4cc won't make a noticeable difference anyway.

[Greg E]

For adjusting injector scaling, is there any way to get ECUflash to put in the exact number or is the only fine adjustment via the latency tables. I'm trying to enter 770, but values are only 776, 757, or 796 when entering numbers in the 770 range.

That happens because of how the scaling translates the HEX value into a number that makes sense to us. Don't fret. The variance doesn't make any difference.

[Kx1984]

so for my Denso 660cc

DENSO 660CC injector latency

LBS=63
OMS=2

10V=1.15
11V=0.99
12V=0.86
13V=0.74
14V=0.64
15V=0.55


do i just change the fields to match this voltage and injector value or is there a way to calculate the the time at lower voltages

Voltage listings in ECU Flash
4.69v=3.825
7.03v=1.770
9.38v=0.975
11.72v=0.705
14.06v=0.450
16.41v=0.300
18.68v=0.300

kx

[Jeff V.]

Just try to match up the voltages to the latencies as best you can. Once you're in the ballpark, you can log your fuel trims to fine tune it and adjust as needed.

[Kx1984]

i have no listings for anything under 10V so just start at 10V and up?

[aaronatstate]

i have no listings for anything under 10V so just start at 10V and up?

I'd hope your car is never running at 10V or under.

[Greg E]

You can change both sets of columns in the latency table to match the values in this chart if you wish. Only the 14v column needs to be adjusted as that's typically the voltage the ECU sees while the motor is running (assuming you have a good alternator).

All this info is also in the training vids.