Thanks man. And I'm 35 this year. Don't worry the cumm comes back

And listen to TOFU he sounds like he can help you out on the fine tuning more then I can.

 

Well when I had it tuned ljavy17 did it ask him for my hpt file he should have it on hand for you by the way I experience it in 3rd around 4k-5800k and sometimes in 3rd in higher rpms but usually will go down to .3 knock retard by end of third. I am thinking that heat is what is causing this problem for me because the knock retard usually doesn't show up until 3rd gear when the car produces the most boost and heat. But ask ljavy17 for glockglade's tune so you can look at it.

 

A high IAT2 is suspected...
Without tuning, try increasing the octane or reducing the temps going into the combustion chamber. Fog it with some meth/nitrous. I have basically the same setup you do and I only get knock in lower rpm's between gear changes (burst knock). My afr is ~12.3 and my IAT2 during WOT in 3rd or 4th is <140.

 

DOC knows his stuff too!

 

It sounds like pre-ignition to me. Since he is stating he only gets knock @ WOT in those gears I think there is something causing autoignition (charge before spark).

Glock, you might want to try this if you have a way to read knock retard on the street. Put your car into 3rd-4th gear at the lowest mph possible and go WOT. If you get knock during the lower RPM’s there is a good chance it may be detonation vs. pre-ignition. Since pre-ignition occurs when a “foreign object” in the cylinder chamber becomes hot enough to create combustion before the spark you usually will not see this happening in the lower RPM range. Reason being is only at high speeds and higher a/f amounts do you get the enough heat and pressure to cause a “foreign object” (usually a tiny metal shaving) to combust creating autoignition.

Of course, this is not to say you will not get detonation at higher rpm's....but instances like that usually only occur in very high compression motors.

 

Do you want me to do this with or without octane booster in the fuel right now there is none in there.

 

Tofu you thinking carbon build up?

 

OK did the ultra low 1,250 rpm in 3rd gear instantly when I hit the gas the car produced 2.4 degrees and immediately went away. So what now?

 

that should be burst knock....I'd expect it. I don't like it, but its expected at low rpm's.

 

So what should I do? Is there anyway I can estimate my a/f either by short term or long term fuel trim with my aeroforce what about o2 sensor voltage. Anyway to estimate?

 

get Ljavy to tune it out...
I don't estimate afr with the O2 voltage.
I'd have the LTFT at 0 to -4

 

I will but in the mean time I am running my octane booster and hitting the track friday will post results.

 

Sorry for the late reply. You are definitely experiencing detonation as you are getting knock at any variable RPM under load. Detonation occurs when the thermal stability of the fuel being used is compromised by both heat and compression (pressure created from the cylinder cycle). Like Doc said you want your LTFT's (Long Term Fuel Trim) 0 to -4 ideally. I'm assuming you guys are tuning in SD mode and not using a wideband? Also, check the commanded AFR% and IDC.

 

Don't worry about the late post by the way I am not tuning just reading my guages. ljavy17 has the hp tuner, but until i see him again i am just going to use some octane booster. maybe we could set something up the day i get tuned so you can chime in and offer your advice if we have a problem eliminating knock.