So, what ends up happening is the bank gets trimmed to the center of a combination between your leanest and fattest injectors. That variance would be less than what you see in the thread above.
Black Jack: Working up to slicks
- Thread starter FastDriver
- Start date
I have a set of 42 lb/hr injectors off a lightning and just dropped them in the car and never thought much about it until a couple years ago. Pulled them and had a local guy flow, disassemble, clean, reassemble with new filters and pintle caps and the difference was pretty big. They were flowing on average 37 lb/hr and after the clean up 43 lb/hr with less than 2% deviation. These are Ford/Bosch injectors so I would expect that.
With regards to matching / having balanced injectors I would say that level of build is pretty high end. For most of us if they are within a pound I’d say it’s good.
With regards to matching / having balanced injectors I would say that level of build is pretty high end. For most of us if they are within a pound I’d say it’s good.
I'm probably overthinking it for the winter build, but I did have a ringland go in a dart/forged motor. That's not cheap in time or money. I run the same injectors in boths builds, and I'm definitely going to get this done or buy a setup to do it myself on those injectors.
85GTStangGuy
5 Year Member
No idea actually, but would you want/need one of the models that services 8 injectors at once? (versus that "4 cylinder" model you linked).
Question:
I realize that your tuner setup is designed to sense/tune/adjust per cylinder bank but is there any provision for manually trimming a single injector?
I realize that your tuner setup is designed to sense/tune/adjust per cylinder bank but is there any provision for manually trimming a single injector?
@85GTStangGuy
I'm sure it's unlikely that the first one I saw would be the best choice, but the description reads, "If there are 8 fuel injectors, divide them into two groups and clean 4 at a time."
What I would like is the ability to directly and precisely measure the inputs to the computers like:
- Voltage offset
- hi & low slopes & breakpoint
- opening delay
I don't really know what else, but of course the ability to do ultrasonic cleaning, ensure consistency across injectors, etc...
I don't think the one I linked can do voltage offsets.
It would be cool to get @Decipha or @a91what's input. Apparently, it's not too hard to tune high slope & low slope based on how the AFRs are off. Here's a thread that descibes the process: https://eectuning.org/forums/viewtopic.php?t=9395
Since I replaced my old FMS 30 lbs that I bought BNIB just a few months ago, I figured the factory test data would be good enough, and went straight to tuning the MAF. But, and this is important, *so long as injectors are consistent* then you should be able to adjust injector slopes in the tune to compensate.
I'm sure it's unlikely that the first one I saw would be the best choice, but the description reads, "If there are 8 fuel injectors, divide them into two groups and clean 4 at a time."
What I would like is the ability to directly and precisely measure the inputs to the computers like:
- Voltage offset
- hi & low slopes & breakpoint
- opening delay
I don't really know what else, but of course the ability to do ultrasonic cleaning, ensure consistency across injectors, etc...
I don't think the one I linked can do voltage offsets.
It would be cool to get @Decipha or @a91what's input. Apparently, it's not too hard to tune high slope & low slope based on how the AFRs are off. Here's a thread that descibes the process: https://eectuning.org/forums/viewtopic.php?t=9395
Since I replaced my old FMS 30 lbs that I bought BNIB just a few months ago, I figured the factory test data would be good enough, and went straight to tuning the MAF. But, and this is important, *so long as injectors are consistent* then you should be able to adjust injector slopes in the tune to compensate.
I tried to address this regard to the BS3. The short answer is no. And if it's possible with the EEC, I am unaware of that. I doubt it.
The physical controller inside of the EEC may be a one-for-all.
I'll have to look around for a board diagram. If a driver/controller does exist for each (vs. a batch controller) then it's a matter of firmware.
85GTStangGuy
5 Year Member
Understood.
I still think it'd be better to be able to see/compare/measure all 8 of them together.
Also: This is the [very] reason why "Tuned" MAF sensors will only get you so far.
My PMAS sensor calibrated for 42s, ran like crap and it's because of the reasons outlined in the article you sited above.
I've been to lazy to really sort through all of that but I understand the concepts pretty well. If you get this all sorted in y our head, this will be your job when you retire.
They even have schools for the [doing] portion of all of this.
I stand corrected. A bit if googling suggests if I set up a Cam synch, the BS3 will do individual cylinder fuel trimming. I don't have any way to measure anything individually, but a starting point would be simple compensation for injector flow, once measured.
I could think of a few things that you could do to "fine tune" if you ended up that far down into the weeds including but not limited to, a simple heat sensing gun on exhaust tubes (leaner is hotter).
Another method would be to trim one cylinder in each bank at a time and comparing the AFR/RPM logs. With adaptive tuning enabled you can see how far closer/further from center the EEC attempts to trim the bank after each adjustment.
Another guy did something similar on corral. So, I posted my mod list from the first post, which is pretty updated, and I asked ChatGPT what it would run in the 1/4. I thought its answer was really good:
I believe it'll go 11.5-11.7 and do 118+.
The car's done a best of 12.63@108 NA. It's gone 12.0@114 on the spray, but I don't even think that was really a 100-shot.
I believe it'll go 11.5-11.7 and do 118+.
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Then I prompted: "What did it cost to build and what could I sell it for. It needs paint but runs well"
I kept track of everything for a long time. I think I have at least $15k in the car on top of using the T56 I already had. And, I think $15k is about what it might pull, but I'm not sure. So score 2 for AI.
I kept track of everything for a long time. I think I have at least $15k in the car on top of using the T56 I already had. And, I think $15k is about what it might pull, but I'm not sure. So score 2 for AI.
GPT needs to get a price update on paint, $3-5K won't cover all the materials for a good paint job, let alone the labor.
I talked to a nearby guy with low overhead who paints and the best number he could throw at me was $9k.
.
