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-   -   Injector Timing Stuff (https://www.miataturbo.net/megasquirt-18/injector-timing-stuff-106189/)

Keuzy 12-23-2021 02:15 PM

Injector Timing Stuff
 
'93 1.6 standard injector drivers, 700cc
Im trying to tune throttle response at idle, I figure getting the right injector timing down there will help a bit. Ive done some reading on here and general consensus is to start at 360 and dance around there, so I went to an empty parking lot and did that.
https://cimg7.ibsrv.net/gimg/www.mia...a4a3a1fa03.png


I have it set to mid pulse and each step is a 20 degree change.
If I were tuning for throttle response, would I want to target lowest MAP or lowest AFR? Seems to be about a 20 degree difference.

Keuzy 12-23-2021 04:59 PM

;

SpartanSV 12-24-2021 04:46 AM

IMO There's no way that VE table is tuned properly.​​​​​ If that's not tuned properly you shouldn't draw any conclusions from injector timing changes.

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Keuzy 12-24-2021 10:55 AM

youre right, i shouldnt have shown that, i dont want to spread misinformation

shuiend 12-24-2021 10:58 AM

Go check out https://evansperformanceacademy.vhx.tv/ and sign up for a month. He has some good videos about injector timing, and how to properly tune it. But as mentioned above I believe you want a pretty dialed in fuel map before you start playing with it.

Keuzy 12-24-2021 11:39 AM


Originally Posted by SpartanSV (Post 1614556)
IMO There's no way that VE table is tuned properly.​​​​​ If that's not tuned properly you shouldn't draw any conclusions from injector timing changes.

​​​​​

https://cimg0.ibsrv.net/gimg/www.mia...176ba6e6c1.png
What do you think is wrong with it? I know overun isnt dialed in very much, im aware, im working on it. You think the injector dead timing is off?

SpartanSV 12-24-2021 01:22 PM

You have some very steep jumps between cells next to each other in the same row targeting the same AFR. That's always a red flag.

The values in your idle area are spread out further than I'd expect. That could indicate a deadtime issue.

I am just making guesses without a proper log/tune but it looks like you have other things to sort out before worrying about injector timing.

Keuzy 12-24-2021 03:08 PM

Ill do some experimenting, im starting to think the injectors I got off classifieds arent legit.


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