Gear Compensation question

s300 and SManager software questions & answers
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TheLawProject
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Gear Compensation question

Post by TheLawProject »

I have been struggling to dial in my AFR's when under WOT. My low cam and cruising map is solid at 14.7, and when at WOT I can get a solid 12.8:1 throughout the entire rev range in third gear. My problem is, in 4th gear the WOT AFR's go richer to about 12.4:1, and when in first and second gear, it gets a little leaner to 13.1:1. What can be causing this, less load in 1st and 2nd? What is the best way to go about resolving it?

I did try and pull 2% from 4th gear, and it fixed the WOT AFR's, and they are now at 12.7/8ish, but now when in vacuum cruising its a little lean at 15.3:1.

Any suggestion, or advice is greatly appreciated. Thank you!!
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Hondata
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Re: Gear Compensation question

Post by Hondata »

1st & 2nd do run differently than other gears but I'd start by looking at the injector dead times.
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TheLawProject
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Re: Gear Compensation question

Post by TheLawProject »

Okay. I’m running the stock integra GSR injectors that we’re just cleaned and flow tested. Therefore my injector setting under parameters is stock 240cc.
TheLawProject
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Re: Gear Compensation question

Post by TheLawProject »

Even though they are stock 240 Honda injectors, I may need to address and adjust dead times?
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Hondata
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Re: Gear Compensation question

Post by Hondata »

No, if the injectors are stock then the dead times will be correct.

What are your fuel trims like? Do you have a large voltage offset on your wideband input?
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TheLawProject
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Re: Gear Compensation question

Post by TheLawProject »

No adjustments to the fuel trims have been made. Overall, Cranking, and throttle tip in are all at 0. I haven’t made any adjustments in Fuel trim.

I also have 0 voltage offset for my wide band.

I am running in Open Loop, so maybe Closed loop would compensate enough to bring the AFR’s back down to the 14.7 that was there before pulled the 2% from 3rd and 4th gear?
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