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I would say closed loop. Im not forcing the car in closed or open I just start the car and let it get to closed loop. I haven't really been doing much tuning im just scared to go passed slight throttle since ive made fuel map adjustments.
The fuel map is not a 1:1 target for AFR. Our ECUs are not wideband target.
Mrfred (and others) recommends 12.0 across on E85, on a wideband.
Yes I understand he suggests 12.0 wb02 reading across board. Not 12.0 in every map cell .
So lets say I shoot for a afr of 12.0.
My wb02 reads 10.8 and my High octane map has a 12.8.
Is it safe to keep raising High octane map cell until target is reached? Or would I lean out globally and richen up map to stay below the `14.7 number in my high octane map?
Pul it up in software, so it's visible like mine. Then do an ALT + PRT SC on your keyboard, then when your in the reply portion of your post, select the picture looking icon above the message window, then right click and past where it states to past.
Yes I understand he suggests 12.0 wb02 reading across board. Not 12.0 in every map cell .
So lets say I shoot for a afr of 12.0.
My wb02 reads 10.8 and my High octane map has a 12.8.
Is it safe to keep raising High octane map cell until target is reached? Or would I lean out globally and richen up map to stay below the `14.7 number in my high octane map?
Sounds like your injector or MAF scaling is way off if you are getting close to 14 in the fuel map to get close to 12.0 AFR on your wideband.
12.0 Is pretty lean in my book for pump E85. I've tested a few different evo's on the dyno and there wasn't any more power/smoothness made with going leaner then 11.2-11.5. Now, Going richer is harder to ignite but thats generally richer then 11.0. Bring the plug gap to .018-.022 depending on boost levels.
The 4g63 is an old engine and likes a richer mixture.
It may live at 12.0 but if its not making any more power, then you are better offer being closer to 11.2-11.5 so it cools the cylinder. Also with the stock ecu fuel temp can change AFR and if you tuned for 12.0 AND then it went leaner you could damage the engine.
Same rules go for timing, Be conservative. It needs to be picking up decent power on a dyno on each degree or the timing needs to comes back out. The old saying goes "The last two will get you"
Hope that helps
Edit, Remember your wideband is reading an average of the afr. If you run things leaner , some cylinders can get less then others. Just another reason to run low 11s.
12.0 Is pretty lean in my book for pump E85. I've tested a few different evo's on the dyno and there wasn't any more power/smoothness made with going leaner then 11.2-11.5. Now, Going richer is harder to ignite but thats generally richer then 11.0. Bring the plug gap to .018-.022 depending on boost levels.
The 4g63 is an old engine and likes a richer mixture.
It may live at 12.0 but if its not making any more power, then you are better offer being closer to 11.2-11.5 so it cools the cylinder. Also with the stock ecu fuel temp can change AFR and if you tuned for 12.0 AND then it went leaner you could damage the engine.
Same rules go for timing, Be conservative. It needs to be picking up decent power on a dyno on each degree or the timing needs to comes back out. The old saying goes "The last two will get you"
Hope that helps
Thanks for the educated input. There is so much mixed feelings about target afr.
I am understanding now. Now does the high octane map need to have certain ramps or curves? And also does the smoothness of the map effect performance?
For instance it being close to flat. Will that affect anything?
Sounds like your injector or MAF scaling is way off if you are getting close to 14 in the fuel map to get close to 12.0 AFR on your wideband.
RazorLab those numbers i input were just used for an example. Those are not numbers i am dealing with.
I work full time and i usually log in the morning and after work on my way home and to work. They are not wot logs just barely cruising and also some 50% tps pulls to be safe. Then i get home and look at logs and then make map adjustments. I made a high octane map recently and been adjusting little by little. Today i made some more adjustments and i seem to be heading in the right track. Im now seeing 12.8 spool up and tapers to around 11.8 around 10 psi.
Oct 6, 2016, 03:29 PM
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