tuning? good input wanted no bashing!!

[IOWA LLY]

So if I adjust that table will I gain fuel?

Honestly do you really know what your talking about?

If the fuel qauntity being called for is higher then that table will allow, based on RPM vs Airflow, then yes. Now if the limit is in another table then no it will not allow any more fuel.


Honestly I have no idea what I'm talking about. But fortunately for me, that means I'm in the same boat as you, except I usually only post when I'm sober.:thumb:

 

[IOWA LLY]

another question, how do i set up my maf flow rate scale? i take this is very important since i do not pull much air across the sensor at idle, but max out the sensor up top!

I would leave the maf sensor scaling alone. Especially if your maxing it out up top. I assume your running a 5" or larger intake correct?



A low maf reading WILL NOT limit fuel if the tune is set up correctly.

 

[sweetdiesel]

I would leave the maf sensor scaling alone. Especially if your maxing it out up top. I assume your running a 5" or larger intake correct?



A low maf reading WILL NOT limit fuel if the tune is set up correctly.

i thought you told him it was a issue? Aj u and i our not in the same vote....i tune my own truck and you pay for tuning:thumb:

you seem to know alot about tuning and really have no clue other than what your told.

do some field work and then you can spout off

 

[IOWA LLY]

i thought you told him it was a issue? Aj u and i our not in the same vote....i tune my own truck and you pay for tuning:thumb:

you seem to know alot about tuning and really have no clue other than what your told.

do some field work and then you can spout off

Once again Simon, your clueless. I told him the tables to check. I would bet money that one of the tables I posted is the reason why he gets no fuel past 1900. Then he asked if he could max out B0751 and B0752. To which I simply answered yes. I never said it was the right thing to do, nor did I say it is what I would do. Am I wrong.......?

 

[S Phinney]

I have an answer to your problems. Have a pro come tune it in person and your problem will go away, guaranteed.:happy2:

 

[redws6rocket]

I have an answer to your problems. Have a pro come tune it in person and your problem will go away, guaranteed.:happy2:

why? how are you supposed to learn, how do you think they learned?

 

[Killerbee]

"hang"

As long as he is not code limping (2000 rpm defueling), this is great advice.

...For the not fueling past 1900 RPM, do you have the tune setup to limit fuel for a given MAF reading? It could be cutting fuel because it isn't seeing enough air to give it more fuel and since it doesn't have fuel the turbo won't spool and draw in more air. Kind of a vicious cycle that chases its own tail. Not sure if that is your problem, but maybe something to look at.

I have seen a "smokeless" tune, go to elevation and suddenly lose its spoolup ability. This is why. B0751 and B0752. IMO they should have been put in the dsp tables.

 

[Killerbee]

...another thing from my truck pulling buddy is max timing is at 24, it was recently bumped up to 29.

Treading dangerously. 29 can be safe, or tragic. There are so many other combined parameters that complete this sentence, but heat is the main one. On a relatively cool motor, it might be fine. On a heat soaked motor that just pulled hard, then the "negative" torque will destroy quickly.

There are peripheral tables where you can pull some of that timing with changing dynamic factors that affect heat of compression, like ECT, IAT, BOOST... maybe even fuel temp. That is how you can make higher base timing numbers work.

 

[TIMTHECARMAN2004]

Treading dangerously. 29 can be safe, or tragic. There are so many other combined parameters that complete this sentence, but heat is the main one. On a relatively cool motor, it might be fine. On a heat soaked motor that just pulled hard, then the "negative" torque will destroy quickly.

There are peripheral tables where you can pull some of that timing with changing dynamic factors that affect heat of compression, like ECT, IAT, BOOST... maybe even fuel temp. That is how you can make higher base timing numbers work.

Very well put!

I have heard of people that tell the ECM to give the motor 30 degrees of timing and then log the run and say.... I only hit 22 degrees of timing. Well with all the different multipliers and such, and depending on what RPM you hit, you may never see 30 degrees of timing... Maybe that is why some guys think that you can not log a locked ecm. I honestly don't know. I guess that if someone told me that they gave me 30 degrees of timing, and I only see 26, then maybe that would throw some people off a bit.

You also have to take the elevation multipliers into count as that changes everything from different parts of the country.....