Injection Timing ECT Adjustments

[Janimal444]

I tuned a few LB7s for a few of my friends around town. I'm wondering if I should change the Injection Timing ECT adjustments at all (Tables B0913 and B0915). I left these as they were stock, and with the cold weather approaching I'm thinking I should probably adjust these tables to back off the timing when coolant temp is below operating temparature. How is an engine going to react to 25* of timing in sub-zero temperatures up north? On the same note, that timing is set to come in at high RPM, which these engines will not see until up to operating temperature. Just wondering if you guys adjust these?

 

[S Phinney]

I haven't made adjustments to those. I don't think it will be a problem for you. I haven't tuned anything up north either.

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[PureHybrid]

IMO a touch more timing would help, since you will have slower igniting fuel from cold cylinder temps, and more fuel pressure

 

[chevyburnout1]

I usually take what timing changes I have made and factor them into the ECT charts. IE: when the engine is cold it adjusts it back to the factory timing.

 

[Dozerboy]

x2 especially if you run high timing down low. I know the timing isn't ideal on our bigger tunes, but just keep your foot out of it until it warm.

 

[sweetdiesel]

I posted a calculator in timing calculator thread that uses excelvto adjust timing etc

 

[Dozerboy]

Ya that what I use now.:thumb: I did the math the first time and it takes a bit that way...

 

[Janimal444]

I posted a calculator in timing calculator thread that uses excelvto adjust timing etc

Ok thanks I will check it out

 

[Dozerboy]

You have to watch it IIRC his is set up for the LB7s, but I think it worked find for us just we don't have the same # of columns. Just look over the table after your done and make sure there isn't something crazy going on.

 

[THEFERMANATOR]

I posted a calculator in timing calculator thread that uses excelvto adjust timing etc

I use this one as well as the pilot correction calculator in all of my tunes. They are all quiet as can be when cold. The ones that get me are the DSP5 tunes where you have to pick which tune to set the offsets for. In thos instances I normally set them for the smallest tune, and tell them to run it until it is up to temp.

 

[DIESELMAFIAPER.LB7]

ill have to look but my truck runs the sane timing as the base map 2-4* it was 12* this morning???? and ive never touched those tabes.....

 

[whytry]

Most guys take it easy when there truck is cold...i never touch them tables...never caused an issue

 

[Dozerboy]

Doesn't matter how easy you take it if you run high timing down low. Mine would rattle in the 50s as soon as I touched the go pedal.

 

[whytry]

My tunes run low timing down low i find it helps spooling... Any way i mean keep the r's down when the truck cold and you wont get to big timing numbers....

 

[THEFERMANATOR]

Doesn't matter how easy you take it if you run high timing down low. Mine would rattle in the 50s as soon as I touched the go pedal.

The LBZ I put your econ tune in would rattle just like this down here in our warm winter weather. He switches it back to stock until it's up to about 160 and all is good. I know reduce the multiplier to half and it has taken care of most of it even on the big tunes.