IAT Ignition compensation

[civic1234]

I have reviewed a datalog run on 3rd gear, Under parameter I have set my ignition to retard 5 degrees of timing once it hits 130F IAT, but according to my datalog no ignition retard is happening and it still shows the same ignitiong timing on the main timing tables.

I'am a bit worried that my Turbo set up will detonate if the ECU does not automatically retard timing based on Higher IAT readings, I have reached 175F on certain occasions and never saw ignition retard based on my settings

[Hondata]

Datalog and calibration please.

[civic1234]

Here are the files you need, Notice that the ignition timing is the same as the main ignition table at 0 degree cam angle under VTEC (K24A4).
Yes, 0 degree timing is the best cam angle for this particular Turbo K24A4 (stock K24A4 head not K20) for best power according to an actual dyno!

It should be pulling -5 degree's of timing once it hits 130F according to my own custom setting but nothing is being pulled.

[Hondata]

That's because your knock ignition limit is set to 59.5 degrees. The ECU uses the lower of the table timing (6.5 degrees) and the knock ignition limit less various retards (55.5 degrees), so uses the table timing.

[civic1234]

I did this to basically disable the Knock sensor logic of the ECU because I am using forged internals and do not want to see ghost or phantom knocks.

I did not know that it has any effect on IAT compensation, How do you suggest solving this dilemma??? I want raw ignition tables without any intervention from the ECU as far as pulling timing based on knock readings (Just like HONDATA S300 with knock disabled) because I am using E85 and is pretty much knock resistant.

[Hondata]

You could set the knock ignition limit to 0.

Why retard the ignition with IAT when using E85? The logic of the ECU is that you only need to retard to prevent knock, and if you're not going to knock, why retard?

[civic1234]

I wanted the IAT ignition to still work (Retard timing on High IAT temp) because I'am using a small intercooler and I will still see over 180F Intake temp on hot summer days, even with E85 I still think this is high enough to cause possible detonation. I just want an extra protection due to heat soak in the summer time, in winter season I never see IAT go higher than 130F.

Getting back to the original question:

1. If I now set my ignition limit to 0 are you now saying that the natural logic of ignition timing retard based on IAT will function like it should???
2. I have my IAT compensation to retard -5 degrees once it hits 130F temp so therefore I should see -5 degree timing pulled universally once I hit that threshold correct???
3. If I set ignition limit only on column 8-10 to zero, and leave column 1-7 the same "pre-set" value from any base map of Hondata Kpro, then I should still have factory like knock protection on part throttle is this correct?

thanks

[Hondata]

1. It's a little more complicated. If your knock ignition limit is 0º, you can still get retard, depending on the knock control and knock retard values. I'd zero the ignition limit and then change the knock retard table if you need to.
2. Yes.
3. Probably what you want is something close to the factory ignition limit table, but change all the negative values to 0.