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Injector phase, -180 or 400

Posted: Sun Jul 23, 2023 4:29 pm
by ridewhencan
I'm trying to figure out why my Beer Money ECU base map has an injector phase of -180. As a friend recently mentioned, "-180 seems odd, since I believe that would be after the intake valve closes." And also, "For injector timing, -180 = 540 degrees as its a 720 degree 4 stroke engine." I'm reading an informative thread at https://www.miataturbo.net/megasquirt-18/itt-injector-timing-table-tuning-84981/ but haven't gotten all the way through because of a work issue for the past week. But I'm wondering about the origin of the -180 phase.

Ken and I worked hard to get a steady afr of 11.8ish at WOT with new Flowforce 725cc injectors but the car does not feel as powerful as it did before the new ecu. I just replaced the walbro 190lph fuel pump, which crapped out, luckily for me, in my driveway. I went with a new one so maybe that has something to do with it. Headed out for a drive now.

My most recent tune and data log were uploaded to Online last week.

Re: Injector phase, -180 or 400

Posted: Sun Jul 23, 2023 4:45 pm
by AndreyB
-180 was a poor choice of default until November 2022.

Back in November of 2022 default was port injected engines was changed to -400, -400 and 320 would be same thing. +400 does not seem to be right value.

https://github.com/rusefi/rusefi/commit/151416b0052d896125d4b4e1e1e63a0db0ec464b#diff-595bebbe72108b3cd00219181a03317deb0d4403dce1099df3536d8edb90159

Re: Injector phase, -180 or 400

Posted: Sun Jul 23, 2023 6:10 pm
by ridewhencan
Thanks. Will take a look. Seems the VE table will have to be adjusted.

Occured to me that I should link my Online uploads incase anyone else is interested. https://rusefi.com/online/view.php?msq=1506 and https://rusefi.com/online/view.php?log=1258.

Re: Injector phase, -180 or 400

Posted: Sun Jul 23, 2023 6:16 pm
by AndreyB
Really appreciate explicit tune links! We are getting off-topic but overall default tune situation is very much not ideal.

Re: Injector phase, -180 or 400

Posted: Fri Jul 28, 2023 9:25 pm
by ridewhencan
You mean my tune or the off the shelf tune?

Re: Injector phase, -180 or 400

Posted: Sat Jul 29, 2023 7:37 pm
by AndreyB
I mean that off the shelf / default / canned tunes for most popular vehicles should be better but well, this keeps not happening for multiple reasons :(