CALC VET Summary Notes

[Taz]

Could any body tell me why to ?

AFR is fuel type dependent (can vary) - while EQ and Lambda are not (consistent regardless of of fuel type used).


Regards,
Taz

[joecar]

+1 what Taz said.


Also, I've seen GM.AFR stay constant while GM.EQIVRATIO tracked small changes in B3605/B3618.

[joecar]

Help please for a newbie from the UK... I get as far as 3. but my flashscan V2 has no >> info

my options are

F1 Select Pids
F2 Data Logging
F3 Scan Options

That is from the V7 scantool software.


[ sorry, I didn't see your post for 1 year, I don't know what happened ]

[Tuneboy]

Hi!

I have a question about the CALC.VET tuning tips. Do I change this values before logging and tuning and when I'm done change the values back?
Some of these values where already chenged in my tune but for example number 2:

2. B0120: Change RPM Threshold for Airflow Calculation from 4000 to 400
Eliminates any Airflow Correction from the VE Table

I have changed this to 400 now but should I change it back to 4000 when I'm done with the tune?

Thanks
Tuneboy




III. CALC.VET Tuning Tips

1. B0701: Disable Catalytic Converter Protection
Insures accurate stoich and PE mode/WOT Fueling

2. B0120: Change RPM Threshold for Airflow Calculation from 4000 to 400
Eliminates any Airflow Correction from the VE Table

3. B3308: Disable DFCO: Change B3308 (M6) to 140C Change B3313 to 140C
Accurate fueling computations

4. B4105: O2 Switch-points to 450 Millivolts
Smoother MAF & VE Table

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

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).

7. B3608 and B3609: PE Delay: set these to zeros.

[joecar]

Hi!

I have a question about the CALC.VET tuning tips. Do I change this values before logging and tuning and when I'm done change the values back?
Some of these values where already chenged in my tune but for example number 2:

2. B0120: Change RPM Threshold for Airflow Calculation from 4000 to 400
Eliminates any Airflow Correction from the VE Table

I have changed this to 400 now but should I change it back to 4000 when I'm done with the tune?

Thanks
Tuneboy

Yes, correct, when you're done tuning you change it back to 4000 to re-enable the VE table.


III. CALC.VET Tuning Tips

1. B0701: Disable Catalytic Converter Protection
Insures accurate stoich and PE mode/WOT Fueling
During tuning only

2. B0120: Change RPM Threshold for Airflow Calculation from 4000 to 400
Eliminates any Airflow Correction from the VE Table
During tuning only

3. B3308: Disable DFCO: Change B3308 (M6) to 140C Change B3313 to 140C
Accurate fueling computations
During tuning only

4. B4105: O2 Switch-points to 450 Millivolts
Smoother MAF & VE Table
Permanent

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

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).
Permanent

7. B3608 and B3609: PE Delay: set these to zeros.
Permanent

[Tuneboy]

Thanks for this great answer, I'll save this for the future.

I didnt pass inspection this year(car is going rich),

1. B0701: Disable Catalytic Converter Protection
Insures accurate stoich and PE mode/WOT Fueling

This B0701 was disabled from my mailorder tune when I was at the inspection, but i guess this has nothing to do with it. I will enable it when I'm done with the tune.
I have started a new thread about my problems and trying to learn Calc Vet and hope that it can solve this.
Thanks again for a great answer!

[joecar]

To pass the emissions tailpipe sniffer, it helps to run in closed loop.

[Tuneboy]

Hi!

Ok, I see. So even with a standard(Orginal) tune and B0701 disabled as only modification to the tune, the car runs in open loop?

That was good info and hopefully it helps me pass the sniffer running in closed loop next time =)
I will try to tune the car with CALC.VET anyway as soon as I have time and get the wideband working.
Thanks for your help!

[joecar]

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

[joecar]

Where are you located...?