CALC VET Summary Notes

[Tuneboy]

You would have to look at a log to see if it is entering Closed Loop.

Yes, Ok I will keep an eye on it when the tune is done. I probably cant start work on the car until next week, I will post a new log then that I want you to look at. I'm from Sweden =)

[TLKSCHP]

I'm trying to do the
Calc.VET: correcting MAF and calculating VE (in single log)
but am having problems understanding a few things. I've done the AutoVe several times in the past and been running Speed Density for the last 7 years but I swapped the cam again and thought about trying the maf again.

5. B3618: PE Modifier Based on Rpm (EQ): 1.16
Safe adequate Fueling regardless of Fuel Type

This is confusing me and I'm sure i'm over thinking it. Lamba 1.16? Isn't that 17 AFR? If correct why set that lean? when I changed

6. B3616: PE Enable: make sure PE enables as load becomes significant
(e.g. below 60% TP below 3200 rpm, 35% TP above 3200 rpm).

Also setting up the MAP's . I've found a few other post asking how they should be set up but the answer usually refers to this thread but to me it's not clear or I'm again over thinking
For example is the Data Tab: Calculated VE, BEN corrected (g*K/kPa)
or External Wideband Lamba?

Are we still using hide cells of 50 or less?

I'm sure I will have more questions
Car runs pretty good now except for some idle & start up hiccups I have never been able to fix since the last cam, but still better then I have scene come out of the surrounding dyno shops.

By the way it's a 98 C5 Auto, 3600stall, heads, 231/239 617/623 114 cam

Thanks
John

[5.7ute]

EQ 1.16 not Lambda.

[TLKSCHP]

I just think it would help if just a few things of verbiage were added to help people that are learning and new to tuning.
But then again maybe I'm the only one that had difficulty

Example:

5. B3618: PE Modifier Based on Rpm set to (EQ: 1.16), (Lambda .86), (AFR 12.61)
Safe adequate Fueling regardless of Fuel Type

I'm still lost on the maps

[joecar]

EQR = 1/Lambda

I can add "(EQR 1.16)(Lambda 0.86)"... (altho you should be becoming very aware of EQR vs Lambda and how they relate to each other)


but I want to avoid AFR completely (what fuel are you running...?)

[TLKSCHP]

EQR = 1/Lambda

I can add "(EQR 1.16)(Lambda 0.86)"... (altho you should be becoming very aware of EQR vs Lambda and how they relate to each other)


but I want to avoid AFR completely (what fuel are you running...?)

I am not aware, looks like I will have to do some research on the subject now. Until now I haven't ran across the term that I've noticed. I don't remember it in the AutoVe tutorial originally used.
Which brings me to another set of questions,
If were working off EQ now should I not be setting my maps up using Lambda anymore?

by the way
Just plain oh low octane 91 gasoline here in Kansas

maybe it's time to just give up and trailer it to Texas,

[joecar]

Set the tunetool fueling units to EQR (this makes sure your fueling tables are correct regardless of fuel used).

For tuning, the correction factor is: commanded EQR * wideband lambda.

[joecar]

Many professional tuners (across all vehicle brands) use lambda (see books/videos by Greg Banish).

[joecar]

Use the calc_pids.txt file from the Calc.VET thread, you can use this to set up your maps for AutoVE, AutoMAF, Calc.MAFT, Calc.VET (or any other tuning).

[Dave_62]

Hello all,

I'm having my first crack at tuning using CALC_VET. I've got everything set up per the tutorial and have logged a test run, but I'm confused about this statement from Joecar's summary notes: Calc.VET corrects MAF and calculates VE from corrected MAF (with VE disabled).
Nowhere in the tutorial can I find any mention of disabling (or how to) VE. I understand for CALC_MAFT that the MAF must be disabled, various sources
show how to do that no problem.
Can anyone point me in the right direction?

Thanks