does anyone know what the accel pump feature is on the pc3? what does it do & what difference does it make?
My question is how you turn it off/on anyhow? My PCIII came preloaded with the 'Hindle Slipons map' at my request. I never had to do anything but plug it in and go.well its just mines pretty rich as it is, even under 4500 rpm. not sure if it would help me. may turn it on anyways to see what it does.
You have the jist of it. With the secondaries removed, you can no longer delay the extra airflow for the fraction of a second needed for the heavier fuel molecules to catch up. Until then, you are lean. The part about rpms is the part you have deduced incorrectly. Rpms have nothing to do with it. This condition happens no matter what rpm you are at when you crack open the throttle and it happens on all ICE engines, carbed or FI. But you seem to get the idea.sounds like its leaned out for a second before the fuel catches up to the air. By removing the secondaries we have more air entering the combustion chamber rather than adding more fuel up until a certain RPM. Which i believe to be under 4500 RPMs because the secondaries mod says it may run too lean under 4500rpms. If we can add more fuel to the mix at the same time we are allowing more air; I think we would achieve a better result. This is what I got from the post above. If you read it a different way, please share....
i turned my accel pump feature on. seems to make a difference but there are so many adjustments. u have sensitivity adj. revolution adj. & fuel adj. if i knew a little more about it im sure i could fine tune it a little more. is there a baseline adj. any suggestions?You have the jist of it. With the secondaries removed, you can no longer delay the extra airflow for the fraction of a second needed for the heavier fuel molecules to catch up. Until then, you are lean. The part about rpms is the part you have deduced incorrectly. Rpms have nothing to do with it. This condition happens no matter what rpm you are at when you crack open the throttle and it happens on all ICE engines, carbed or FI. But you seem to get the idea.
The fact that this program only activates for a limited amount of crank revolutions (20-60 I think, user selectable) is brilliant. If it didn't stop after these revolutions, you would end up too rich everywhere else, full time, which isn't good either since being too rich can actually rob HP. This assuming you have perfect jetting/tuning in the first place. The most powerful engines are actually slightly leaner than stochiometric at their peak HP.
oh yeah but like i said so many adj. curious if it could b better. of course it runs like a raped ape already. my problem is i want crap perfect & usually keep messing until it is. :lol:
that would be cool. i wouldnt mind spending $50. for a custom map 4 my specific mods but kinda hard to cough up $300. for a dynotune that shows some good hp & torque numbers but might not be that great on the street. :headshake:I know the problem. When I bought my PCIII USB I couldn't wait to get into it and set up all the goodies. After reading a ton on the subject I started a thread about the pump software and settings and only got 1 reply. It said it had tons of buttons and he removed it after a while. I agree with you. It runs so good stock and responds great to the right mods it is hard not to play with it. Besides, it is all part of the hobby, right? I a few months I'm going to get a custom map made and I figure I'll install the pump software and finish any other mods before that.
BTW, there is a company online that does supply custom maps for whatever mods you have and they use the pump software. Their maps are only $50 or so compared to $300 for the hands on dyno-tune custom maps.
Maybe someone will help us with a name to this online map company.