Timing Retarding WOT

[hunter3763]

Hello, anyone have any idea on what can be cauing timing retard during WOT on my 17' SS?

Modifications:
- Long Tube Headers

-LT4 Fuel System

-F1A Procharger ~ 9ibs

-Meth Injection

ticket.hpl
Attached is a file of 2 runs...

[SultanHassanMasTuning]

load your tuned and stock file, more than likely your torque is off.

[hunter3763]

Unfortunately I don't have my stock file... Here is my tuned.Tire Size.hpt

[TCSS07]

where do you see the timing retard? i only see the timing swing during shifting gears so its probably a torque management issue. during the pull its reading normal. you can try adjusting the min spark tables and see if that helps because i dont see any t/m settings under transmission

[SultanHassanMasTuning]

your have major issues and timing is not what you should look at now

your rail pressure and fuel pump are dropping are not even close to what it needs to be.

[hunter3763]

Okay thank you! Is this being caused by tune or am I running out of fuel? A local performance shop tuned my car and im glad I got the tuner because there are quite a few things im looking at that im not liking.

[TCSS07]

you could be running out of fuel but you arent logging injector duty cycle or injector pulse so we dont know
is the in tank fuel pump also a lt4? because if not it probably cant keep up

[hunter3763]

Its supposed to be, kind of wondering if they didn't change it. They were supposed to do low fuel pump, high flow fuel pump, & injectors.

[hunter3763]

If it helps, lambda jumps from .73 to .78 during WOT

[TCSS07]

i haven't dabbled too much into the gen 5 stuff beside the basic shit so im here to learn also
have you tried messing around in the fpcm for desired fuel pressure. some things i noticed is normal fuel pressure is set to 46.4 psi which is where you pretty much are during the pull so im not sure if the pressure is dropping or not but i would think under wot load it would switch to a higher pressure but maybe not.
do you have a wideband installed? if fueling was a issue youd start to go lean as fuel pressure drops off. is that the case? or is it pretty steady?
adding injector duty cycle and injector pulse to your logs would be helpful in seeing how hard the injectors are actually working
.73-.78? thats pretty rich wouldnt you say for direct injection? DI can usually get away with a leaner afr than port fuel can. or is that what it ends up being when your spraying methanol? and with out it its not as rich?

[Camaro6]

Your tune is way off, especially when it comes to the fueling parameters for the LT4 fuel system. You'll also want to tune the FSCM for the LT4 fuel system. The car is so lean (any positive long term fuel trims) it's adding fuel during WOT. I run 8-9psi with LT4 fueling and no Meth.

You could pull a ZL1 tune from online and check it against yours. You'll see the differences when doing a compare.