Well ima try and figure this out on my own, it has to do with the tourqe limiting right?
im not really worried about my trans, its built. it should be able to handle what my tiny little stock charger throws at it
Question: how do I turn off the defueling in efi live
- Thread starter CBJ61NASH
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Well ima try and figure this out on my own, it has to do with the tourqe limiting right?
im not really worried about my trans, its built. it should be able to handle what my tiny little stock charger throws at it
All a diesel does is fuel various amounts based on pedal position and programming.
"Defueling" is not bad by itself.
Alot of folk mean "shift defueling" I think.
Tell me, how fast can you accelerate if the auto trans clutch is disengaged? If you allow RPM to climb when clutches are disengaged, does this help shifting?
Casper does not have shift defueling removed, nor does Wendy or Blue.
I've seen folk remove all shift defueling then complain their transmission failed early, and they actually went slower down the 1/4mi.
This is just my opinion, and how I tune my trucks. Dunno if I'm right or wrong, but it works for me.
Am i supposed to eat my steering wheel every time it shifts under WOT?
i think im gonna get whiplash if this keeps up
i think im gonna get whiplash if this keeps up
Here's the simple way to dramatically reduce shift defueling:
Start with a stock Main Injection Pulse (No Pilot) table.
Highlight all cells from 20mm down, and 90mPa and up.
Multiply all values by 2 , maybe 2.5 even.
Run it.
What this will do, is if the engine calls out for 50% reduction in HP during a shift, it will ignore it. Only if it calls for more than 50% will it have even a slight effect.
I won't do this to my truck, but you can if you like.
Start with a stock Main Injection Pulse (No Pilot) table.
Highlight all cells from 20mm down, and 90mPa and up.
Multiply all values by 2 , maybe 2.5 even.
Run it.
What this will do, is if the engine calls out for 50% reduction in HP during a shift, it will ignore it. Only if it calls for more than 50% will it have even a slight effect.
I won't do this to my truck, but you can if you like.
Are you absolutely sure it's not enough fuel during the shift?
There is nothing else it could be at all?
i ran it WOT and it feels like it shuts down in between shifts, like if it was a standard with a real slow shifter.
I see a few options...
(1) Acquire a taste for pleather
(2) Purchase a neckroll
(3) Adjust the tune
I vote for #3
When was the last time the fuel filter was changed?
Just a thought...
(1) Acquire a taste for pleather
(2) Purchase a neckroll
(3) Adjust the tune
I vote for #3
When was the last time the fuel filter was changed?
Just a thought...
Yes, I know you are. That same tune in LB7's normally shifts fine, and several are in the 12's or better without disabling shift defueling. A few are deep in the 11's.
Send me back the tune, tell me you want zero shift defuel. I will do it for you for free.
I'm thinking there is another problem, but one way to find out is to see.
I see a few options...
(1) Acquire a taste for pleather
(2) Purchase a neckroll
(3) Adjust the tune
I vote for #3
When was the last time the fuel filter was changed?
Just a thought...
about 2k miles ago. i have an airdog150 on there too.
i could change the filter and try it out, i have an extra laying around.
Pat, maybe i just haven't given the tranny to learn, ill sent you the tune, but ill try the one i got on there for a little while and see how it turns out.
oh yeah, how bout them modded lb7 fpr's?
OK, I found your stock tune. There are very few trucks with your O/S out there.
Kat will email you a tune with some reduction in defuel.
Seems I might have missed a couple of tables since new tables were added after I first built one of these O/S.
Sorry for the confusion.
Kat will email you a tune with some reduction in defuel.
Seems I might have missed a couple of tables since new tables were added after I first built one of these O/S.
Sorry for the confusion.
Well, I do have an LLY... just filled out my sig
Thanks, I wasn't using my head as usual.
I've heard conflicting "reports" regarding defuel. I've heard that the Allison can handle non-defueled shifts without trouble, and that the defuel is there in our trucks for "driver comfort", and others say that the transmission won't survive without defuel. I'm 99% sure that there are other applications where an Allison transmission is used and there is no defuel in stock application, possibly high torque applications. I somehow doubt Allison would have put the option to turn off torque management in the TCM OS if the transmissions couldn't take it.
I will not drive around with no torque management anymore until there is a time that Mike L. will give it his blessing
Defuel is there to prevent a tie up on a shift under high power and high rpm conditions. The ugly truth is the Alli is not capable of shifting fast because of its design. You can take the defuel out without a problem to the Alli if you cut the power down. You must give the Alli enough time to make the clutch to clutch transition into the next gear or you will tie it up. A tie up is being in 2 gears at once for a split second or longer. Picture 500 hp and 900 lb tq in a 7K truck under WOT being in 2 gears at once for an instant. Guess what's going to give? I will award a cookie for the correct answer. :baby:
Good answer Mike. My only question is how can PPE remove defuel from their big tunes when it's the big power where you can have problems with no defuel? I don't know how they do it, but supposedly the excellerator can remove defuel from the ECM.
Are you still giving out free planetaries to those with the wrong answer?
Yes I am. Shipping and handling is 1,000.00.