Cell AFR verus actual AFR?
#2
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Up to 100% they are pretty much spot on. Within a few tenths anyway, but after that its modified by a few things and you end up going on prior experience as to what numbers will result in what. Throwing bigger injectors in and getting them accurate seems to get them closer (the AFR numbers) to what they actually are but even then they end up as approximations.
JB
JB
#3
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As JB wrote.
but to be perfectly clear, the numbers after 100 load are silly, and unless you have changed injectors to a very rare instance those afr numbers are still silly.
Forget those numbers, change them to suit your afr you are wanting, by adjusting them relative to your wideband readings. NOT by changing them to the afr you want.
but to be perfectly clear, the numbers after 100 load are silly, and unless you have changed injectors to a very rare instance those afr numbers are still silly.
Forget those numbers, change them to suit your afr you are wanting, by adjusting them relative to your wideband readings. NOT by changing them to the afr you want.
#4
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I find that fact rather gaytastic. Life would be so much simpler if that box simply meant what it said.
You'd probably see maybe 2 people offering flashes then.
With proper scaling of the injectors and MAF for any changes made, and disabling lean spool, is it not possible to keep them pretty close to real?
I'm still learning about this too, so don't quote me.
You'd probably see maybe 2 people offering flashes then.
With proper scaling of the injectors and MAF for any changes made, and disabling lean spool, is it not possible to keep them pretty close to real?
I'm still learning about this too, so don't quote me.
#5
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^ Sure. But.... lean spool kicks ****!
I dont like messing with the MAF readings. I like to see the freq I'm getting and calculate AIRFLOW from those readings.
Keep in mind once you switch to a open air filter something as simply as removing your splash guard will throw the MAF readings off. I'm still on the stock box and plan on keeping it that way.
I dont like messing with the MAF readings. I like to see the freq I'm getting and calculate AIRFLOW from those readings.
Keep in mind once you switch to a open air filter something as simply as removing your splash guard will throw the MAF readings off. I'm still on the stock box and plan on keeping it that way.
#6
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http://spreadsheets.google.com/pub?k...jfVdIKgha6qJZA
here is an example of an altered map caused by a particular injector. I was able, with a different scaling to get closer to a one to one map, but while trying to find optimum latencies ended up with this one.
I use water injection so my map would be a bit leaner than most, but nowhere near what is indicated here.
here is an example of an altered map caused by a particular injector. I was able, with a different scaling to get closer to a one to one map, but while trying to find optimum latencies ended up with this one.
I use water injection so my map would be a bit leaner than most, but nowhere near what is indicated here.
#7
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^ Sure. But.... lean spool kicks ****!
I dont like messing with the MAF readings. I like to see the freq I'm getting and calculate AIRFLOW from those readings.
Keep in mind once you switch to a open air filter something as simply as removing your splash guard will throw the MAF readings off. I'm still on the stock box and plan on keeping it that way.
I dont like messing with the MAF readings. I like to see the freq I'm getting and calculate AIRFLOW from those readings.
Keep in mind once you switch to a open air filter something as simply as removing your splash guard will throw the MAF readings off. I'm still on the stock box and plan on keeping it that way.
Coming from DSM's I have never had to recalibrate a MAF extensively for anything so trivial. In fact...
that includes changing the entire intake tract. filter/intake/turbo/IC pipes/IC, TB/manifold/head/valves/intake cam
I didn't even leave the valve guides in there.
![lol](https://www.evolutionm.net/forums/images/smilies/lol.gif)
No problems.
Seems like if you sneeze around this one the difference in ambient air pressure will throw it off. What a pita...
![Roll Eyes (Sarcastic)](https://www.evolutionm.net/forums/images/smilies/rolleyes.gif)
What's so different?
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#8
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Think of the value in the AFR map cell just as a number between 8.0 to 20.0 that is used to respectfully rich or lean the fuel by IDC. The only time it becomes calibrated to being close is in stoich where NB O2 sensors start to work (closed loop) the other values in open loop is just a number to feed the fuel
#11
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AFR's are approximatley 1 point leaner than your map. If you have a boost leak your car will run significantly richer than your map states. Nothing is silly, nothing is stupid, nothing needs recalibrated.
#14
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This is just pure insanity...
Coming from DSM's I have never had to recalibrate a MAF extensively for anything so trivial. In fact...
that includes changing the entire intake tract. filter/intake/turbo/IC pipes/IC, TB/manifold/head/valves/intake cam
I didn't even leave the valve guides in there.
No problems.
Seems like if you sneeze around this one the difference in ambient air pressure will throw it off. What a pita...
What's so different?
Coming from DSM's I have never had to recalibrate a MAF extensively for anything so trivial. In fact...
that includes changing the entire intake tract. filter/intake/turbo/IC pipes/IC, TB/manifold/head/valves/intake cam
I didn't even leave the valve guides in there.
![lol](https://www.evolutionm.net/forums/images/smilies/lol.gif)
No problems.
Seems like if you sneeze around this one the difference in ambient air pressure will throw it off. What a pita...
![Roll Eyes (Sarcastic)](https://www.evolutionm.net/forums/images/smilies/rolleyes.gif)
What's so different?
of course, this all could be useless ramblings as well
![Crap](https://www.evolutionm.net/forums/images/smilies/crap.gif)