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Help me understand the wall wetting function and it’s adjustments
Posted: Tue Aug 23, 2022 7:25 pm
by mx5newbie
Trying to work out a small issue of when I attempt to revmatch during downshifts. It seems at slower speeds, less rpm, i blip the throttle and it goes lean, but at higher speeds it appears to rev just fine. From all the reading I’ve done here, it appears that the wall wetting adjustment seems to be the proper solution. Please help me under how this works. Thanks in advance.
Re: Help me understand the wall wetting function and it’s adjustments
Posted: Tue Aug 23, 2022 8:05 pm
by AndreyB
I have no wisdom to answer but sometimes a URL of your current tune and a URL of your log showing the issue is helpful.
https://rusefi.com/online for both
Re: Help me understand the wall wetting function and it’s adjustments
Posted: Wed Aug 24, 2022 9:56 am
by 007adr
I’m my limited experience, I’ve allways left wall wetting alone and concentrated on acceleration enrichment you will find with logs you are using more throttle at lower rpm’s to to match rpm compared to higher rpm, a lean spike is normal to see when you stab the throttle, you just add fuel to acceleration enrichment untill it feels right
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Re: Help me understand the wall wetting function and it’s adjustments
Posted: Wed Aug 24, 2022 7:08 pm
by mx5newbie
Ok, I've finally got logged in using my laptop. I'm uploading my tune and the last log. I've been playing with the numbers in AE, but I cant say I truly understand how the table actually works in reference to throttle position. I'm hoping that will be explained so I'll better understand. Fuel needs some smoothing in some places, but I'll get back to that later. Other than this small issue, car runs and drives great. Thanks in advance.
https://rusefi.com/online/view.php?msq=1185
https://rusefi.com/online/view.php?log=998
Re: Help me understand the wall wetting function and it’s adjustments
Posted: Wed Aug 24, 2022 7:14 pm
by AndreyB
Re: Help me understand the wall wetting function and it’s adjustments
Posted: Thu Aug 25, 2022 1:01 am
by BeerMoneyMotorsports
Hey AK, what injectors are you running? Your VE numbers are wack.
- image.png (276.67 KiB) Viewed 5762 times
Re: Help me understand the wall wetting function and it’s adjustments
Posted: Thu Aug 25, 2022 1:14 am
by mx5newbie
mx5newbie wrote: ↑Wed Aug 24, 2022 7:08 pm
Ok, I've finally got logged in using my laptop. I'm uploading my tune and the last log. I've been playing with the numbers in AE, but I cant say I truly understand how the table actually works in reference to throttle position. I'm hoping that will be explained so I'll better understand. Fuel needs some smoothing in some places, but I'll get back to that later. Other than this small issue, car runs and drives great. I’m using FIC 775cc injectors. Thanks in advance.
https://rusefi.com/online/view.php?msq=1185
https://rusefi.com/online/view.php?log=998
Re: Help me understand the wall wetting function and it’s adjustments
Posted: Thu Aug 25, 2022 1:28 am
by BeerMoneyMotorsports
LOL, sorry about that. Below is the injector data for the FIC injectors. try these dead times. you can follow the basic curve for any outside of these.
8---- 2.34
10--- 1.57
12--- 1.18
14--- 0.91
16--- .72
18--- .53
- image.png (23.79 KiB) Viewed 5758 times
Re: Help me understand the wall wetting function and it’s adjustments
Posted: Thu Aug 25, 2022 1:32 am
by mx5newbie
Will do that now.
Re: Help me understand the wall wetting function and it’s adjustments
Posted: Thu Aug 25, 2022 4:07 am
by mx5newbie
Thanks to BeerMoneyMotorsports we made some changes to dead time settings and made VE changes to get the AFR back to normal. Now the car seems to run even smoother than before.
New dead time and Idle VE:
- 8B3C4DE1-1839-4EEA-9E60-5E215AD5F15C.jpeg (4.44 MiB) Viewed 5744 times