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Old 03-23-2016, 08:34 AM   #56
anjuna
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Member#: 401977
Join Date: Sep 2014
Chapter/Region: TXIC
Location: Houston
Vehicle:
IDFK Wat
bish whet

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Quote:
Originally Posted by simpleJ View Post
I ended up finding a lovely tool to help scale things up using AFR errors in open loop, and compares the fuel look up tables to massive closed loop data logs to help you generate a baseline scale for closed loop fueling. From there it is basically inputting and then tightening the scale each time to come to a dialed in cal.

Now, where I am running into trouble is around that 1.8v mark, which is where our cars tend to run when cruising, fueling will wander up and down depending on the load. My scaling tool is adding too much fuel in that range. So I keep bringing it incrementally closer to where it needs to be.

Get a bit above that and A bit below am in the +-4% range.

Last night I moved to the v301 map which could explain why my scales are off a little more than expected today. I took like a half hour-ish log of traffic and freeway driving at varied speed.

Back at it tonight. I'll post comparison spread sheets of the cals when I finish

Be careful with your method.

If you're doing some sort of "target vs actual" type method for determining error, you're gonna have a bad time when you lift throttle (target remains 14.7 and actual goes to 22, resulting in an huge positive fueling error)

If you're working with your AF correction in closed loop, be careful as this goes to 0 in all your open loop stuff (WOT).

I've had good success in sorting by AF ratio and cutting all the stuff that is off throttle. Then you don't end up cutting idle data too.
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