Violatorno1

iTrader: (3)

....or set it to 0 and see if it starts.

RedHardSupra

iTrader: (1)

hey, i like to drive the point home, but i'm not that vicious

slow

iTrader: (7)

you can set the VE to 100, and you will be fine, you cannot set to to 0 without maxing out both the maf error threshold function, and the "maximum limit factor" in hpt to a 1.9 will increase how far you can drive until it goes into a failure more, requiring reflashing the pcm to clear the fault, but it will not be a drivable tune at all

Ryan

SSpdDmon

iTrader: (10)

There's a calc pid in the scanner I just noticed that computes a VE value based on MAF. The equation shows:

VEpcm=MAF*(IAT+273.15)/((displacement()*61.024)*RPM*MAP)*6155274.24

I didn't get any values that made sense with that and I wasn't sure how to represent displacement.

So, I tried the following:

VEpcm=(MAF*(IAT+273.15)*6155274.24)/(displacement*61.024*RPM*MAP)

...and used cylinder_volume*8=5665.527336 for displacement.

The result appears to be relatively close to my VE in grams*K/kPa.

Is it possible this calculated .pid is wrong in EFI Live?

RedHardSupra

iTrader: (1)

the numbers are usually just conversions of units. i do everything in metric, so i dont need any

SSpdDmon

iTrader: (10)

That is for using metric (IAT, MAF, MAP). I don't know where the constants come from though...

TheBlurLS1

iTrader: (8)

Question....

How do you do this in HPT? Is it not possible, or am I just Ray Charles over here???


Edit: Is this the "Dynamic Airflow: High RPM Disable" ? It's set to 4000 now (stock).

SSpdDmon

iTrader: (10)

I believe so...

SSpdDmon

iTrader: (10)

Still been thinking about things in this thread....

Going to try to dial in the IFR table with a virtually stock MAF table. Then, switch to SD with that IFR table and dial in VE. That way, when I re-enable the MAF, it should all work together. Still working on figuring out the low RPM richness. Think it may have to do with minimum IPW's or something along those lines.

Frost

iTrader: (45)

You are right on the edit....

in HPT it's:

Engine> Airflow> Dynamic Airflow
Look at the 3rd coulmn down on the left "High RPM Disable"

Violatorno1

iTrader: (3)

Jeff, next time out logging try throwing the clutch in and going to neutral anytime you need to decelerate. You'll notice that the cells that are usually rich will appear alot better. Definately a deceleration problem which seems to be tracing back to just what you said, IPW problem. I know you can try to filter out deceleration but it just doesn't seem to work out for me. My problem has always been 30-35 kpa from 3200rpm down. Doing my best not to allow any engine braking really shows a difference in BENs.

SSpdDmon

iTrader: (10)

I've actually started doing this recently. A good way to help filter out the engine braking is to filter by TP%. Eliminating anything less than 2~4% should help.

Violatorno1

iTrader: (3)

Hmm...Havn't thought of filtering that way. I'll try that on a few logs.

joecar

Jeff, what does your filter all exclude...?

SSpdDmon

iTrader: (10)

That all depends on what table I'm working on and whether or not I forgot to turn DFCO off or not.

I always filter out these two things:
** When TPS is changing more than 2% per 500ms
** When Timing @ #1 Cylinder is changing more than 6 degrees per 500ms

Those help eliminate transitions.

Right now, I'm working on the IFR table based on the stock MAF curve (B0120 set to 1rpm).

I filter out:
** Engine RPM is less than 2200rpms
** TPS is less than 2%
** MANVAC is greater than WX kPa
** MANVAC is less than YZ kPa

The last two play out 'per cell' in the IFR table. In other words, if the cell I'm working on is 25kPa, WX becomes 26kPa and YZ kPa becomes 24kPa. Make sense? I do something similar with the VE table when in SD. I filter out the data that falls through the cracks of the table base on kPa and RPM. To achieve this, I've got a long-*** filter to take care of the kPa columns. But, I have to adjust each RPM row at a time and filter out anything that's not within +/- 50rpm of the row I'm working on.

The point of doing that extra filtering focuses on the data that is at the center of the cells. It helps to eliminate the PCM's interpolation influence in your data. If I get time someday soon, I'll clean up and post my filters. It's a simple text file....but like I said, I want to clean 'em up a little first.

COMPRACER

Where do i find this ve/maf blending threshold in HP Tuners?

Shallow Bay

iTrader: (3)

Post #90, seven posts above.

https://ls1tech.com/forums/showpost....3&postcount=90

foff667

iTrader: (2)

Dynamic Airflow tab.

COMPRACER

Would this be the high rpm disable under dynamic airflow?

foff667

iTrader: (2)

Yes...