Timing being pulled on stock file

[LITTLEELVISDAN]

Notice how much timing is being pulled on acceleration -30

Wahts up with that?

[wait4me]

It was just getting ready for a shift / executing. that is normal

[submariner409]

32.5 degrees of advance is one hell of a lot during acceleration - under high loads it should be down around 0 to 10 degrees - wait4me is correct: the engine is unloading prior to a shift. Normal highway load should run around 34 - 38 degrees total advance, and some engines are OK with as high as 40+ (not a Northstar and not blown.....)

Too bad the old mechanical/vacuum advance distributors couldn't react that fast.........

"Pulling timing" actually refers to dropping down to less advance than maximum for the given power demand, and it's done to prevent detonation under load.

.....just noticed that the throttle position is 30%, so the engine is not under any great load - timing will stay advanced for the most power under those load conditions....

[CIWS]

Originally Posted by wait4me

It was just getting ready for a shift / executing. that is normal

So you have / did tunes for the STS-V as well ?

[wait4me]

Yes plenty. That is why i like the 4 cam engines. There are ALOT of things you can do with it. 4 cam variable cam timing is awsome..

[LITTLEELVISDAN]

Originally Posted by wait4me

Yes plenty. That is why i like the 4 cam engines. There are ALOT of things you can do with it. 4 cam variable cam timing is awsome..

Let us know what tunes u can provide us.

[thefred]

Originally Posted by LITTLEELVISDAN

Let us know what tunes u can provide us.

A little ditty about Jack and Dianne
Two American kids growin' up in the heartland ....

Sorry, I coldn't resist.....

[LITTLEELVISDAN]

Loaded dyno tune and this is whatI got

Auto sport mode

[LITTLEELVISDAN]

manual shift hitting the rev limiter on accident

[LITTLEELVISDAN]

auto mode got a KR

[LITTLEELVISDAN]

Ok so what makes a KR happen?

[wait4me]

In you last log, you where making 8.9 lbs of boost and the computer tried to add more than the 20 degrees of timing when the spark table with the timing added from other tables equalled 24.5. Which is about 4 too much. You can see where the engine say the beginning of a knock frequency and then due to the strength of it, it pulled the max of 4 degrees in order to not have real knock. You can see it is real as the rate it feeds the spark back in is long and took 5 steps.

19.000000
22.000000
24.500000
22.500000
19.500000

Is what it is asking for at that exact spot. the 24.5 was right where you say your spike.

[wait4me]

Also, in your other runs where there was no knock retard, you where running richer so maybe you are running to lean..