acceleration enrichment and ego correction

[AVP]

in an attempt to get the acceleration enrichment a bit better, i increased the fadeout time to 0.48sec

however as i have the EGO correction to 1 engine cycle before reactivating, during small in town driving, the ego correction is mostly off.

can i use reactivation delay : 0?

otherwise i will have to reduce the fadeout time again.

With the above settings, there are long areas of the in town driving being quite rich than they should.

thanks

[GintsK]

You can try it for sure.
Delay purpose is prevent unwanted ego correction after Lambda is disturbed by AE.

As alternative you can try configure AE triggering later - at faster throttle movements. For this configure first AE amount =0 and TPS speed 5....15.

Gints

[AVP]

I see.

I will try the first scenario.

If I choose not to use any fuel at low tps throttle presses, wont that produce more lean spots?

[gunni]

lean spots aren´t a problem unless you get a missfire or you are desperate for ultimate response and you´d be running richer if so.

[AVP]

I know. I'd be needing to get to 0.96 lamda for ultimate results. But here I'm noticing that less lean is noticable in reaction so that's why I'm working on it.

Delay set to zero is not a bad thing so far. I fixed my ve map around the poor reacting area more though so accel. Enrichment wont have to be that much altered

[gunni]

Where do you get 0.96 lambda from?

[AVP]

Tuning books!
They suggest this as a reference, not that it works for all engines equally

[gunni]

Thats clearly bogus as some random target for accel enrichment.

You would have to spend an awfull long time on a dyno to find the right mixture target for best reaction.

[AVP]

i suppose that those who wrote it have done their testing to find the best torque

[gunni]

The power output from lambda 1 to 0.9 isn´t exactly massive either so I think it was a stab in the dark.

[AVP]

i see...

well i managed to do some further testing on mine anyway. i still get lean sporadic on the accel. enrichment settings now, but i completely altered the VE table around 1200-2000rpm and from 40-100kpa which was very lean for some reason. So after each acceleration event, the car went to lean spots and lamda up to 1.10 on some occasions and therefore made it very dull in normal city driving on lower gears.

now it feels more agile again.

I also changed some VE numbers along the acceleration and spool areas of my turbo which for some reason also were on the leaner side. I think that stalled the turbo a bit and made it loose spool rpm. Now it has gained about 100-200rpm in spool and the car does feel much nicer