I currently have my cell hits set to 5 on my STFT + LTFT vs MAF log table. I was thinking of doubling it to 10 for my cruise to mid throttle testing to get a larger sample size. My theory being it will give me a more accurate average.
Is that a good idea or am I over complicating things?
You could just drive it more to get additional hits. Increasing that value won't add any more data, it will leave it blank. All it will tell you is that you might need to drive it more in certain areas.
No matter what you have it set at, you need to review the MAF values to make sure they are smooth.
Ive got a STFT+LTFT / MAF in Hz table setup in my Logging. What ive been doing is capturing the Corrections in it and making the changes accordingly.Originally Posted by gtstorey
I just thought 1 hits with a 15 min drive might be more valuable then 5 hits and a 5 min drive..
I'd say in general the more hits the better, to help capture the more repeatable data and filter out the oddball stuff that doesn't necessarily happen every time. For cruising at a constant speed/RPM I usually use 50 hits. Since you're looking for data while accelerating you'll need to do that many more samples as you increase the required number of hits.
With that said, ideally any VVE/MAF changes should be based on steady state data (more or less constant speed/RPM), so you may want to instead just cruise at a given speed in a given gear, then cruise at a higher speed for a bit (few more miles per hour for a few minutes), then a higher speed, etc., until you're at the desired throttle position. This way you'll have steady state data from normal cruise all the way to mid throttle.
You still need to confirm things are smooth. Don’t just plug in values that lead you to a saw tooth profile. And pay attention to how many values have populated and weight the ones with more hits than ones with fewer.
I agree with the above advice. I will add in that you should view your maf chart and smooth as needed. You may not end up with a perfect curve depending on the maf placement. Make sure nothing stands out or is too far from the correct shape.
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