0280155868 (L67 Injectors)

[Kevspec]

Has anyone got actual injector data for l67 injectors to accurate input all the data required into a 12p ecu?

[Dylan]

There's a good post from user The1 on this.

Grab the data from a VT L67 bin and you're pretty right.
There's a small offset codes in the VT codebase that isn't in earlier ones that need to factor in. Have a search hopefully it pops up.

[vlad01]

I have the data which I am about to use in a mate's hotted up VN v6.

I'll post it up once I get the bins across to my laptop from my main desktop.

Last time I used as is, but I recall that The1 told me about this slight offset but I wasn't 100% clear on what I needed to add or subtract.

I vaguely recall 0.5ms offset somewhere but I could be way off?

[vlad01]

L67 injector data.PNG (90.4 KiB) Viewed 2316 times

[VK_3800]

This is what I was using

12P_868_injectors.png (43.36 KiB) Viewed 2306 times

[vlad01]

That's odd. I can't recall where I got mine from but it was out of a factory SC as far as I recall.

I opened up The1's enhanced SC bin and the values are different again, different to both of ours


I doubled checked my 12P tunes against Enhanced for the standard 777 injectors and that all checked out perfectly, the SC one was different as I just mentioned so I copied over the Enhanced SC injector data to the current VN tune I am working on.


This should be correct and I can verify it when I have the car by unplugging the alternator and watching the AFRs


Note that the 0.00ms add on time = 0.00ms as I noticed that all Buick factory tunes including all the 12P ones have this zeroed out. I mean it makes since, if the injector is being commanded to be 0ms, (off) then why add an offset to turn it back on?

Probably something the later MAF based PCMs code does differently, maybe for interpolation smoothness or something?


Also I found the PMs regarding injector stuff from The1 and the 808 needs 0.5ms for the voltage bias added to equal the same result as the later MAF PCMs, but since it's across the board it doesn't actually matter as the VE table or kinjflow will take up the small difference. I never bothered in the past and when I learned of this I still used the data as is and tuned to suit.

L67 injector data-12P-derived from enhanced SC.PNG (80.46 KiB) Viewed 2262 times

[VK_3800]

maybe for interpolation smoothness or something?

I would think so, most likely not going to get opening times that small in most real-world applications though I guess.

I don't recall exactly where my data came from, I probably did some adapting/calcs to get it. Worked fine for me although that's hardly scientific. I found that the Deka 60s needed accurate data when switching in and out of single/double fire mode, but when running double fire all the time close enough seems to be good enough.

[Kevspec]

Thank you will try them and see