Editor AFR Settings

[JoshMcMadMac]

There are a few different AFR settings in the editor. Power Enrichment Base AFR vs. ECT, COT Air Flow Ratio, different startup AFR corrections. Where do you suggest I set these?

[JoshMcMadMac]

Thanks for the quick move, Mods!

[ZeroBoostBuick]

Power Enrich vs RPM vs time.... and/or Power Enrich "Base AFR vs ECT".

I'll try my best to explain.

the "PE vs RPM vs time" adds on to the PE "base AFR vs ECT" acording to rpm's and time.... let's say in the PE "Base AFR vs Engine Coolant Temp" under a given engine coolant temp you have the value of 13 afr, and the "PE vs RPM vs time" table sais -1 in the 5000rpm boxes... so when you are in power enrich at 5000 rpm your air fuel ratio command will be 13 - 1 = 12 afrc.

your car goes into PE mode acording to the throttle position and rpms in the "HOT" table.

I have my PE kick in at 25% throttle and I use the "add vs tps" table to gradually lean out the PE from 70% - 25% throttle position.

the "add vs TPS" can be used only to lean out the power enrich according to throttle position.

my suggestion is to set the HOT PE table somewhere around 50% TPS and not worry about the "add vs TPS" table.

all this info I got from the VCM suite editor sub-titles and "F1" help.

[JoshMcMadMac]

Well thanks, but I was not looking to hear what the settings are. I am looking for input on actual settings for the AFR. I will definitely take the values you listed into consideration!

[Perforator]

The cot & startup afr settings I wouldn't change from stock. Your better off disabling cot. As far as the base pe, from what I've read the ideal for a forced induction car is 11.5:1. You could try that and see how your car responds as far as knock goes. My car likes 11.3:1. It knocks when I try anything leaner.

[BlackGS]

I have the base pe afr around 11.6 and the pe add vs. rpm vs. time is zeroed out completely. With the MAF tuned properly, I have been able to run 11.2-11.4 at the start of each gear, and then it leans out to 11.6 by the end of the gear. I was going to tweak the MAF and add vs. rpm vs. time tables at the track last night, but ran into my MAF maxed problem. The COT and startup tables I left stock.

[Russ K]

There are a few different AFR settings in the editor. Power Enrichment Base AFR vs. ECT, COT Air Flow Ratio, different startup AFR corrections. Where do you suggest I set these?

Read this thread for more info. As for the COT, just max the enable temp.
I haven't had a reason to change the Start Up AFR Correction tables.

http://www.hptuners.com/forum/showth...oop+maf+tuning

Russ Kemp

[krunchss]

What happens that it's recomended to "up" the COT temp. I've heard of this and read a couple things, but couldn't really understand why upping this value helps. Or something like, even if you "up" it, there's something else that can still affects things? I know that sounds like a pile of nothing, hence, I don't really know about it :P

Krunch

[JoshMcMadMac]

What happens that it's recomended to "up" the COT temp. I've heard of this and read a couple things, but couldn't really understand why upping this value helps. Or something like, even if you "up" it, there's something else that can still affects things? I know that sounds like a pile of nothing, hence, I don't really know about it :P

Krunch

Do not feel bad, you are not alone.

[Perforator]

The way I understand it is you raise the COT temp to avoid going into cat protection mode. Cat protection mode will screw with your a/f ratio and it's not something that you want to happen when your wot.