Migrate from HP tuners to EFI Live HSV VE 6.2L Heartbeat sc

I currently have a HPtuners 2bar custom tune in my HSV and want to dump this for a EFIlive tune.
The tune was effectively missing boost enrichment due to some very bad sensor settings, for example
the MAP sensor is a 3bar unit, the scaler was set to a 2bar sensor. Somehow the tuner scaled the VVE
and spark tables so they kind of work, but the the boost enrichment was left at 110kpa (just over atmos)
which never arrives until realworld boost is around -6psi. Consequently I get a lean spike as I throttle on.
Tuner is resistant to admit anything specific wrong with the tune, dispite a lot of data evidence.

So, now I want to progress into a EFIlive tune.

I'd like to keep all my questions and findings within this thread if that's ok......
I am very new to tuning, wanted to get into it for years, so will no doubt have some dumb questions.

In gathering information and general research, I'm getting more questions than answers in trying to make sure all the
sensor data ect is correct.

My first question concerns table B0104 which states cylinder volume 0.75 litre
My engine is 6.2L so each cylinder is 0.775 litre, why the error ?
Even the stock n/a tune states 0.75 Litre.
Somebody suggested that it might just be an information field, but my thinking is why would GM have 2 fields
contain the same data independantly....does not make sense.

The coefficients that sit behind the VVE table need cylinder volume within their calculations (i guess), does this come from table B0104 or somewhere else ?
I may aswell get this little bit right from the off ?

You might not have the correct tune in the ECM, if I open a HSV vs SS tune I see B0104 set to 0.775 and 0.75 respectively. Did you do the tuning yourself or did it go somewhere else? It could be someone just put in a 2bar OS they've done previously hoping it would work.

Quote:

---

Originally Posted by rich24v

...
The coefficients that sit behind the VVE table need cylinder volume within their calculations (i guess), does this come from table B0104 or somewhere else ?
I may aswell get this little bit right from the off ?

---

My understanding is that the VE coefficients are regardless of B0104... this is easy to test.

Quote:

---

Originally Posted by GMPX

You might not have the correct tune in the ECM, if I open a HSV vs SS tune I see B0104 set to 0.775 and 0.75 respectively. Did you do the tuning yourself or did it go somewhere else? It could be someone just put in a 2bar OS they've done previously hoping it would work.

---

Thanks for reply GMPX, current tune is the custom hptuners, created by a "pro" tuner, but even the stock tune I pulled before the work says 0.75 Litre, just find it strange that factory data is wrong......

Quote:

---

Originally Posted by joecar

My understanding is that the VE coefficients are regardless of B0104... this is easy to test.

---

Thanks for reply Joecar, So really it's just an information field and I should not worry about it. As an aside, I looked at the tune for std LSA engine which thinks it's compression ratio is 10.5:1 :lookaround: I should not be surprised to find odd errors.

I've dug out the V2 flashscan and updated the firmware. Although the current tune is a 2bar custom HPtuners, I assume I can still use the
flashscan to datalog and set up the analog inputs for the twin PLX widebands ?......ready for the switch to EFILive tune ?
Stuggling with setting the pids up right now, I'll go look for a guide....

Yes, you can use FSV2 to datalog.

Altho you may not be doing Calc.VET, post #1 in this thread does show how to do some things: Calc-VET-correcting-MAF-and-calculating-VE-(in-single-log)

I've got to plug in 4x 5v analog inputs to the V2, question is, can I buy a single plug instead of the 4x seperates ?.
Like the green plug I use for the hptuner logger....Attachment 19761

Thanks in advance

Quote:

---

Originally Posted by rich24v

I've got to plug in 4x 5v analog inputs to the V2, question is, can I buy a single plug instead of the 4x seperates ?.
Like the green plug I use for the hptuner logger....Attachment 19761

Thanks in advance

---

Yes, there is a single plug available, let me see who still has some.

Also, FSV2 has serial comms support for some widebands, like the LC-1, see post #3 here: serial-port-cable-that-goes-to-v2

If you're located in Aus, you can maybe get one with cheaper shipping by contacting EFILive support.