Timing over 1.36 cyl air mas?

[02Ls1]

I have a 2010 5.3 on 15 - 16 lb's of boost that i can't get timing on high rpm's

I been having trouble getting timing on high rpm's, I checked and see that above 5,000 rpm's it goes over 1.36 cyl air mass and thats when it drops to 0 degrees of timing.
What can i do to get timing above 1.36 cyl air mass? I'm pretty sure this is the problem.
This truck is on MAF open loop, 15 to 16 lb's of boost, boost cam, 3,800 circle d converter and 72 lb injectors.

[SultanHassanMasTuning]

maybe its something with the logging, but almost certain whatever you have in the last row of the timing tables it will go off that.

you know you can edit the axis right?

[02Ls1]

I have 18-15 degrees on my 1.36 row it still drops to 0*

Yes i can change it to lb/cyl, Would that help?

[SultanHassanMasTuning]

change it and see put 2. in the last row, even thought i dont see anything in your tune that it would cause it


does the car feel slower at high rpms, do you feel a drop in power?

[02Ls1]

Ok if right now i want 14* of timing on g/cyl, What i need to put to get 14* timing on lb/cyl?

[02Ls1]

change it and see put 2. in the last row, even thought i dont see anything in your tune that it would cause it


does the car feel slower at high rpms, do you feel a drop in power?

Ok i will try it, I've run it before on 8-9 lb's of boost and run a 12.7 at 107 mph on 8-10*, after that i got a boost cam and boosted up to 15-16 lb's run a 12.4 at 109 with 0*

[SultanHassanMasTuning]

one thing i have run into previously when timig all of sudden drop is actually the cam/crank sensor would be kind of loose or bad.

[02Ls1]

I will check on that.

[01 MidMet WS6]

Your IAT table is pulling 3-4* and your ECT table is pulling around 15* which will net you around 0* of timing. Loosen those up and you will be running much more timing and making way more power!!

Capture.PNG

Try something closer to this and see what happens.

Capture.PNG

[02Ls1]

Let me try it right now.

How I'm pulling -15 from my ECT? It is becuase the -5 I have in the ECT plus the Mult?

[02Ls1]

I did a quick log and still the same this time I log Burst Knock, It show around 4* but i don't think that's the problem.

[02Ls1]

ttt, Just to see if someone can help me out.

[01 MidMet WS6]

Post your current tune file that addressed the items I recommended and include the config you are using with your scan.

[01 MidMet WS6]

Did you fix it?

[02Ls1]

Nope, I about to take a quick log and post it up with file. After that I'm going under the truck take the waste gate and put a 10 lb spring. See if the g/cyl drops and I can see timing

[02Ls1]

Here it is.

[02Ls1]

So I drop the boost to 13 lb's still went over 1.36 g/cyl and timing drop.
Drop it to 8 lb's did not see no more than 1.25 g/cyl and timing never drop stay at 9.5, bump it up to 13* and run way better.

So the problem is on the g/cyl when it goes over 1.36 there's no timing over 1.36

How can I fix this problem? Not liking the 8 lb's

[02Ls1]

Ttt

[tonyvette]

ttt having same problem!

[SultanHassanMasTuning]

change the axis on your timing tables High or low and it will automatically change all other tables.