Quote:
Originally Posted by cjperformance
When i put the dsx aux pump in, i had to change some settings in the fuel system controller. I would get the same thing as you are describing. The solution is in my big "results" thread from last year. Im on my tablet right now or id search it up for you (PITA on tablet), but i did whatever KingLT1 recommended to adjust *I THINK* max desired pressure in the engine and fuel system controllers. Two tables, same purpose. I think what you are seeing is the fscm slowing down the in tank pump because it thinks max pressure is too high. Ill try to remember to search it up later. PM me if I forget!
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OOO!!! Thanks for the tip!!! I'll hit that thread. Thank you for letting me know!!!
Quote:
Originally Posted by cjperformance
I would like to see some kind of plug or cover for the usb port. If even a drop of water gets in usb ports on a regular laptop/pc, it will fry things. I would imagine that if i plug in the usb to the reflex if it had moisture or even just dust collected in it, and then plug the usb into the laptop... damage could occur.
Not sure if that usb port is water tight to the inside either. Ill probably end up putting some electrical tape over it just to keep it clean and dry.
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I was thinking along similar lines. I figured - if nothing else, I'll schmeer some liquid tape over whatever areas I was concerned with. Ghetto - sure, but it might not even be necessary, though, I don't need to take that chance if it takes a little bit of effort.
Quote:
Originally Posted by KingLT1
I believe it's common for the fuel pressure to spike some on the hit with the DSX. Don't think it's going to hurt anything. The drop might be tuning related. Make sure you have your desired fuel pressures set properly or you will get fluctuations barring it's not a supply issue.
Another thing you might be seeing is the dsx activating before the PI, so pressure spikes, then drops some when PI activates and has to recover.
The knock is definitely due to the 91. Even the LT4 doesn't really like 91 octane. I would remove timing out of high octane until it goes away and add what you subtracted to the flex spark table.
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Thank You, too, for commenting. I am currently farting around with that table, in addition to a couple others it seems might help with the spike. BUT - as you already said: it probably doesn't hurt anything, because the spike, literally, is momentary, and then the pressure falls within, like, a second or so. So - as you pointed out - probably not much to worry about.
I hadn't arrived to think about the pressure fluctuations when the PI comes in. I have to admit, with only one good WOT hit so far, it's hard to see transitions, because the FPCM just goes straight to high pressure commanded, so I have a lot of transitional driving I need to do I think. That's an excellent point, though. I think if I can keep the pressure from falling much below about 70-psi, and just maintain right above there, maybe I'll feel better. I'm sure this is all just my nonsensical logic.
Yeah - even using Magnuson's canned CARB tune, I was getting a fair amount. Of course - I'm sure my CYLINDER AIRMASS is a lot higher, as I'm seeing 16-psi because of high BARO pressures and the 103/RFBF combination. I'm getting into the 1.6s of airmass on the SPARK table, so you must be right, as usual.
Thanks, again, King'!!!
