Originally Posted by subeone

who tuned this? me, working off a file i got from a local-ish tuner.

the VE table looks...strange/wrong.. whats "wrong" about it? I have only made it to about 125kpa, so below that is likely out of whack.

the spark table looks ridiculous as well, its a 6.6 right? whats ridiculous about it?

whats the static compression ratio? 9.5

boosted im assuming? yes

your Maf disable is at 0hz, and your high rpm disable is at 0 rpm.. where should it be??

so i wonder what airflow table ur pcm is using for fueling... the VE...? its what I adjust to change the fueling...

and your truck doesnt go into the 'idle' tables, even if it did your idle spark tables are all at 30 something degrees, so you shouldnt see 9-10, my truck specifically, because of how something is set, or every truck??

fix your burst knock threshold, its all zeroed out "enable delta cyl air", do you have a return fuel setup with a vacuum referenced fpr? yes

if so then you are good if not then scale the fuel injectors..and with injectors that big, you have to scale down all the tables that g/sec or any airflow units in them, why? because youll max out your spark tables, so you have to multiply all the tables by 50 percent and then transfer all the spark rows up depnding on your multiplier, so if you multiply by 50 percent then in the .96 (gcyl) row multiply it by .5, so the .96 row is now .48, so put the values for .96 all the way up in .48 g/cyl..and etc.. ill look into this, ive never known how nor really looked into it

but i may be wrong about this tune, thats why your ve tables and spark tables are strange because of the size of the injectors so it could be running perfectly fine, i have just never seen a tune file such as this one


my truck drives great, the driveability is damn near what you would expect out of a factory truck, so I find it hard to believe that everything is soo far off like youre saying... or maybe it is and ive just put some voodoo on it and made it work for me

for your timing problem you might want to check this table, engine>fuel cutoff dfco>dfco entry spark.. then click threshold and put the timing values you want at the corresponding rpm.. should be in the early teens in stock form, also check spark advance table a and b and the blenders...take a good look at the blenders...they should help you with your problem

Originally Posted by subeone

your Maf disable is at 0hz, and your high rpm disable is at 0 rpm..so i wonder what airflow table ur pcm is using for fueling...

Originally Posted by Atomic

its in SD, the button is only for the combined mode, with the diasble set to 0hz, its sd only.


Yea it does, those are just the base spark. The high/low tables are just an upper limit with the idle tables being the base. With that said, park spark is way too high.


Even with a referenced FPR he would need to scale if he wants the spark table more usable in boost. However with doing this you loose resolution in partial throttle. I think its more important to have good drivability than spark control between higher boost. The last row is just used when the table is exceeded.


VE looks fine just hasnt tuned past 150kpa it looks like. If you fuel system is good the ve should be fairly constant on the columns



Simple test, disable DFCO and if timing is normal then it is a DFCO issue and you probably need a faster ramp in rate like he said.


and fix that spark table