Disable Gearbox Learn Function ?

[turbotrana]

Oil pressure not an issue.

[ratter]

lean cruise mode of 17:1 was normal on some 90's cars, and pretty much non existent these days except for some direct injection engines, but having the rpm lower will lower co2 emissions and save some fuel

[turbotrana]

The Supercharged V6 VT I have is lean burn. Runs very lean cruise ratios. I believe they just used the USA tune in these.

I disagree with tuning for emissions. They only look on one side of the equation and that is what is coming out of the exhaust. Big fuels savings are there with lean burn and when you factor the emissions involved in the manufacturing of the extra fuel required to have vehicles comply with emissions, I don't think we are doing the world any favours.

["Captain Retard"]

Yeah I remember Chryslers used to have something called ELB(I think) electronic lean burn.

And Jaguar had HE on their V12s which was some sort of lean burn.

Although I think they were both in the 80s.

[ratter]

running leaner than stoich creates higher Nox, which is the major concern at present and why GM stopped the lean cruise

["Captain Retard"]

Dealing with Sox and Nox is part of my job operating a Sinter Plant as basically it's a combustion process.

And sometimes we get it wrong.

[turbotrana]

But then how much Nox is created when

we search for oil reserves

create the infrastructure

drilling the oil

transport personel to and from the drilling site

refine the oil

deliver it to the pump

etc, etc.

And that is not to mention depleting our oil reserves so that we now have to frack/destroy environments and dig up oil shale.

I would estimate a saving of 10 to 20% for a petrol engine when running lean burn compared to running at stoich.

In the 1990s my EA Falcon would get 350km per tank with the ford tune, with lean burn tuning improvements 600km on the same trip.

I don't think the whole emissions equation was done properly

[Rab]

Emission tuning by the manufactures like that is for the regulations/satisfy the greenies, not to save the planet

It seems wrong to me to make an engine run at less than optimal just to tick some boxes (am sure the 5%?? less emissions I make is more than countered by the 20% more fuel it uses because it's tuned for that 5%)

[ratter]

Stoich of any fuel is the cleanest burn, different emissions will increase while some will decrease by changing either richer or leaner than stoich, stoich is not about fuel useage

[GUN-808]

  On 14/01/2015 at 1:00 PM, turbotrana said:

The only way you can alter shifting patterns is via HP Tuners or SCT tuning. The X Cal 3 wont do it.

Hp Tuners just recently did the ZF tuning side of the software. There are 53 shift tables and about 40 seem to be potentially used in my FG tune.

We dont really know what table is for what driving ATM. Alot of it is making changes to tables and seeing what effect it has.

So far we can get the car to take off in 1st gear every time

I found the cruising map so I have made mine shift into 6th at about 1000rpm

In manual mode I can get it to shift earlier.

We are waiting for the new scanner version to be released to see if it will flag what table is being used. If it allows us to do that then we will know what table does what.

So if you really want to play with gear shifting, get HP Tuners and start playing.

Sorry Trana I should have been more specific with regards to Xcal = I mean SCT as in I dont use HP..

My tuna charges $400 for a "zf tune" (some I know charge $500+)..

ill reiterate the issue with SCT that I HATE the fact I have bought a near $1K computer and I have no access to it myself.. !!

Im well aware of the 50something parameters that's tunable within the ZF but all I really wanna know if there is a simple solution to disable it, meaning a check/uncheck box kinda option ???????????

I will be doing a gearbox build in the near future and most box tuners I have read dont give warranty if theres a tune done to it so I see it as $400 better spent toward the rebuild..