Im a cherry at this tuning **** and im just trying to understand what everything mean. But here is a screen shot of my LOW IGN.

Now at Col 1 @ 1000 RPM its at 16* which is where i get the Dis at correct?
Now at Col 9 @ 5000 RPM its at 25.75* which is advance timming by 9.75* ?



Here is my HIGH IGN
When do we start using the HIGH IGN table? when BOOST KICKS IN?
Now at Col 12 @ 7000 RPM the timing is at 24* wouldnt that make it advance by 8*? if so, i thought you always wanted to retard the timming in boost.


Any help would be great on explaining this to me a little.. Thanks

 

You want to retard timing vs the final non boost column timing at WOT. However, since 93 octane supports a bit more timing, which is usually used with boost, most tuners advance the non boost columns a little and then retard from that, not the idle timing columns.

It goes from low cam to high cam at VTEC.

 

Ummm...thanks for the reply, but can you put it in ABC format please?

 

You are right on some accounts and wrong on others.

You may think about the 25.75 degree cell as being advanced 9.75 off the base timing of 16 degrees if you would like. Although keep in mind you need to set the base timing before you do anything with ignition timing on this or any ecu really. And, that unlike a fixed advance curve on a mechanical advance distributor. You may not always get exactly 9.75 degrees of advance based on some temprature values that you do not have control of.

Low speed tables and high speed tables are differentiated by the VTEC cross over point, not when boost kicks in. (In the parameters window, it goes from low to high at the VTEC rpm point)

These ignition tables are only starting points. You need to determine what works for you on a dyno.

 

So why is there i guess a rule of " retard 1* for every pound of boost" or is that just BS?
So technically your still in advance timming even with IAT correction?
And lets say if i street tune, how would i know when to back off the timming or give it more timming?

Dyno .........there isnt one around here that is why im trying to learn on my own.

 

Dyno .........there isnt one around here that is why im trying to learn on my own.[/QUOTE]

I'm in the same boat, had a tuner, lost our dyno and need to start learning this stuff on my own. Hope to learn more info on this thread. So keep the the tips coming. Thanks in advance.

 

My recommendations to all is go to PGMFI spend hours there.

Then buy a wideband and make a basemap and do a street tune if thats the best you can do.

As for timing, I recommend looking into a det can setup if you dont have a dyno around, though if you have researched well enough, you will get a decent idea of where you need to be and will only need fine tuning with the det can.l