Ludi, the reason I didn't want to do that is that the change happens at exactly 7000 RPM. If you lean out the 7000 RPM zone then it will lean out the 6500-6999 area as well. I thought I could have a zone at 6999 and another at 7000, but it is best to move it by finding the cause I think.

 

Yes, finding the exact cause would be better.

I've been able to get a fairly flat AFR curve, though, by just using the fuel table. It still falls of a little bit at 7000, which is fine with me, but at least it doesn't drop off by .5 AFR (or more) like it used to...

l8r)

 

So, when the ECU starts operating beyond max load value, what timing does it run, the very last load value, or does it just pull timing?



Also, just an uneducated guess: From looking at the IGN map perhaps going from 1 degree to 11 degrees from 6000 to 6500 rpm might be a little too much.

 

It pulls timing.

and the map doesn't go from 1 to 11 in 500 rpm

 

Are you looking at the same map the rest of us are looking at?

 

I thought I was, the image is gone now but it was yellow/orange - maybe those colors gave me a lysergic flashback and I hallucinated timing values.

Nonetheless, what I do remember was at 6000rpm at about 270% load (can't remember exact) the timing value was 1, and at 6500rpm at about 265 timing was at 11.

To me, even though beginner level ecu person, I interpret that as going from 1 degree of timing to 11 degrees in 500rpm - maybe his car is different (IX), but my 04 ssl (so slow ) almost allways runs across that part of the map straight down there right after peak.

Maybe mine is All messed up but it goes in and out of peak steady at 9 degrees, and then climbs upwards as actual load decreases (5500 on up)

Thanks for the info, I was wondering that since my car will hit 265 and this is with the 852*(1603/rpm) method - lower. Now I will have to rescale to like 280

 

What conical intake are you talking about, and yes it does sound like over run. May want to rescale to 320 or 340 kilopascals.

 

It's still there, post #8

https://www.evolutionm.net/forums/sh...90&postcount=8

 

All I see on post 8 are the logs and not the map

 

https://www.evolutionm.net/forums/at...chmentid=95769

 

I stand corrected

 

car has an injen filter with the smooth aluminum intake adapter, some say its the a/f going slightly richer changing the load around and making it jump load cells but the air fuel didnt move around much at the end of the runs, also this car runs nitrous and when spraying it down in the lower gears it seems to pull less load cells then when not spraying, i would like to hear what your thoughts are on why it does that

 

Overrun is a tricky business.. There are several things that can cause it.. But they all affect timing if they rapidly jump outside the last column (overrun) of the map.. If you go slightly over, and the rate isn't so fast, it probably would only be a degree if at all.. But when you rapidly overrun the Map where you may be very quickly outside the range, it may pull much more timing.. I think there is an algorithm (Not found yet in the roms) in the Rom specifically to allow you to overrun the the ECU's programming slightly, but once you go way beyond, it seems to pull timing in preparation for Fuel cut (which you now probably have disabled) to prevent damage.. Specifically its likely this was engineered to prevent overboost from doing damage..

When you hit lower load cells due to less load on the engine (lower gears) you may not get as dramatic a change than if you were at much higher load..

AF's generally will be consistent once the maps are programmed for your needs.. Simply because as you hit higher loads, the AFR number is a reference value, and the ECU knows generally that proportionally higher load, means proportionally higher IDC or IPW..

The problem comes when you alter the engines VE, the ECU is thrown off and your AFR's may go all over the place and aren't as predictable, Thats the problem with aftermarket intakes on the stock MAF...

Plus a wet nitrous system does not factor into the EFI Calculations, and therefore its an unmetered contribution, so it affects many things, the load itself according to the ECU isn't changing much as calculated by the ECU, in fact, according to the ECU, the load might be reduced because it thinks it doesnt have to work as hard..

 

Ya know.. His car is an IX.. perhaps the Mivec is kicking in at a particular point and the timing is being altered accordingly?

 

Exactly. The car does not know there is nitrous since it is installed post-MAF.