87gtNOS
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posted August 03, 2007 06:01 AM
PC Accelerator pump feature
Hey guys this is pretty neat...I turned it on, set it at 100%, 4 revs, and 20% fuel.
Seems to allow flickable wheelies easier...well, I only rode it for 15 mins so far this morning on the way to work....
However, it won't idle. I think I have it set too rich...I'll figure that out.
The reason for this thread is this part of the instructions seems unclear to me.
Here are two quotes from the instructions that seem to say the opposite.
Please someone explain this to me!!!
quote:
Click Sensitivity slider bar and drag it to set the sensitivity for the accelerator pump. The higher the sensitivity value, the slower the throttle movement that activates the 'pump'.
and this one(that points to the slider in the picture in the instructions) seems to say something totally different, I think...
quote:
use slider to set sensitivity for the throttle movement required to activate the 'pump'.
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01 ZX12R
07 ZX14 - YEAH BABY!
03 ZX9R-traded in for the 14!!! June 07!
05 636-traded in for the 9 Sept 05
  
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87gtNOS
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posted August 03, 2007 06:04 AM
I must need a coffee.....hard to concentrate here at work!! As I read that over and over I am just not getting it!!
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01 ZX12R
07 ZX14 - YEAH BABY!
03 ZX9R-traded in for the 14!!! June 07!
05 636-traded in for the 9 Sept 05
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1badzx12r
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posted August 03, 2007 06:59 AM
Click Sensitivity slider bar and drag it to set the sensitivity for the accelerator pump. The higher the sensitivity value, the slower the throttle movement that activates the 'pump'.
that's just that higher you set Sens the less throttle movement at activate pump
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87gtNOS
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posted August 03, 2007 07:01 AM
Less throttle movement or slower movement?
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01 ZX12R
07 ZX14 - YEAH BABY!
03 ZX9R-traded in for the 14!!! June 07!
05 636-traded in for the 9 Sept 05
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87gtNOS
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posted August 03, 2007 07:13 AM
quote:
Less throttle movement or slower movement?
I guess what I have said here is almost the same thing?
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07 ZX14 - YEAH BABY!
03 ZX9R-traded in for the 14!!! June 07!
05 636-traded in for the 9 Sept 05
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87gtNOS
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posted August 03, 2007 07:29 AM
 Edited By: 87gtNOS on 3 Aug 2007 08:29
quote:
Click Sensitivity slider bar and drag it to set the sensitivity for the accelerator pump. The higher the sensitivity value, the slower the throttle movement that activates the 'pump'.
this says to me the more sensitive you set it, the slower the movement that is required to make it spray, NOT the amount you move it.
quote:
use slider to set sensitivity for the throttle movement required to activate the 'pump'.
this to me says how much actual movement is required, not the SPEED in which you 'blip' it.
Sorry guys if I am just not seeing it!!
____________
01 ZX12R
07 ZX14 - YEAH BABY!
03 ZX9R-traded in for the 14!!! June 07!
05 636-traded in for the 9 Sept 05
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87gtNOS
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posted August 03, 2007 08:09 AM
Ok, i spoke the gentleman at PC, he said it's the speed in which you whack the throttle!!
case closed.
BTW, their recommended starting point was 90% sensi, 20 revs and 15% fuel. I'll change mine for the ride home from work tonight!
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01 ZX12R
07 ZX14 - YEAH BABY!
03 ZX9R-traded in for the 14!!! June 07!
05 636-traded in for the 9 Sept 05
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vmaxwayne
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posted August 03, 2007 02:54 PM
Do all PCIII-USB's have this feature or is it an add on like the ignition module??
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1badzx12r
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posted August 03, 2007 04:56 PM
quote:
Do all PCIII-USB's have this feature or is it an add on like the ignition module??
they all have it....
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killakaw4life
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posted August 05, 2007 01:24 PM
What exactly does this feature do?
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ninja12
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posted August 05, 2007 01:35 PM
Give you a little extra fuel when you snap the throttle like the old carbs did.
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BIGZXDADDY
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posted August 05, 2007 02:27 PM
i think they should change the terminology from "accelerator pump sensitivity" to "fuel injector dwell" unless there is something else going on here i'm missing
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"never drive faster than you can see, besides it's all in the reflexes"
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87gtNOS
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posted August 05, 2007 02:32 PM
I don't think dwell is a good term. Dwell would equal time in which the injector is open, which is already called 'pulse width'.
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01 ZX12R
07 ZX14 - YEAH BABY!
03 ZX9R-traded in for the 14!!! June 07!
05 636-traded in for the 9 Sept 05
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BIGZXDADDY
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posted August 05, 2007 03:44 PM
what exactly is being adjusted then? if fuel is being added and we are talking about f.i. the only way that i'm aware of is by increasing inj. dwell or pulse width, which ever you prefer as they are basically the same thing. dwell measures the percentage of time the inj. is open vs. closed, pulse width is the measurement of time the inj. is open- usually in milliseconds. does this feature do something other than add more fuel sooner?
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"never drive faster than you can see, besides it's all in the reflexes"
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87gtNOS
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posted August 05, 2007 03:54 PM
Pulse width is the duration of the spray....
Fuel pressure plays a role on how much fuel is sprayed.....per pulse.
The PC Accelerator feature is like an accelerator pump on a carb. When you whack or stab the throttle, there is a split second where the carb (or injectors) don't keep up. So the accelerator pump squirts extra fuel. On a carb it is usually attached to a rod on the throttle linkage. So it reacts at the same time you stab the throttle.
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01 ZX12R
07 ZX14 - YEAH BABY!
03 ZX9R-traded in for the 14!!! June 07!
05 636-traded in for the 9 Sept 05
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BIGZXDADDY
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posted August 05, 2007 05:24 PM
how did this effect idle quality when throttle is closed? was there any other description in instructions other than what you've already stated? did you change to recommended value? if so what was out come? hope i'm not asking too many questions but i am very curious about this feature and how it can give faster injector response
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"never drive faster than you can see, besides it's all in the reflexes"
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87gtNOS
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posted August 05, 2007 05:33 PM
It has nothing to do with the idle, it only sprays for like 4 rpms, yes only four. You can set it to spray for 1 to 40 rpms. You set the percent of extra fuel. You set the sensitivity to the quickness you whack the throttle. More sensitive means the less you whack the throttle to make it squirt.
Basically the same as an old carb on your car!
I have mine set at 85% sensitivity, 4 revs, and 15% added fuel.
____________
01 ZX12R
07 ZX14 - YEAH BABY!
03 ZX9R-traded in for the 14!!! June 07!
05 636-traded in for the 9 Sept 05
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BIGZXDADDY
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posted August 05, 2007 05:47 PM
in your first post you said it wouldn't idle after setting feature. what was the problem?
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"never drive faster than you can see, besides it's all in the reflexes"
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87gtNOS
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posted August 05, 2007 05:53 PM
I had it set at 100% sensitivity. The reason is, is because on my friend's snowmobile (1000cc 4 stroke R1 based engine) we set his PC at 100% and 1 rpm, and 20% fuel. We set his for asphalt racing. It worked fine for him!! So I figured I'd start that way!! Ran fine, but wouldn't idle.
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01 ZX12R
07 ZX14 - YEAH BABY!
03 ZX9R-traded in for the 14!!! June 07!
05 636-traded in for the 9 Sept 05
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1badzx12r
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posted August 05, 2007 06:24 PM
quote:
I had it set at 100% sensitivity. The reason is, is because on my friend's snowmobile (1000cc 4 stroke R1 based engine) we set his PC at 100% and 1 rpm, and 20% fuel. We set his for asphalt racing. It worked fine for him!! So I figured I'd start that way!! Ran fine, but wouldn't idle.
the way that setting should of worked was ....once YOU HIT the Throttle for 1 rpm a 20% fuel increase would happen... on my set up i've got 95% 20 rpm and 10% and that changes with daytime heating ... i started at 35 rpm and 20% bike would stall...
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87gtNOS
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posted August 05, 2007 06:26 PM
Edited By: 87gtNOS on 5 Aug 2007 19:30
The guy at PC I spoke to has heard of this before and figures that the bike at 100% was just too sensitive!! Works fine now that I backed it off to 85%
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01 ZX12R
07 ZX14 - YEAH BABY!
03 ZX9R-traded in for the 14!!! June 07!
05 636-traded in for the 9 Sept 05
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BIGZXDADDY
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posted August 05, 2007 06:48 PM
cool , thanks for the info on this feature.
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"never drive faster than you can see, besides it's all in the reflexes"
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1badzx12r
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posted August 05, 2007 07:03 PM
THE MULTI- HUB GOT SOME GOOD TUNING ADVANTAGES .... 1 you can set fuel and timing ( with ignition module once released) for any given gear.... right now i can just do fuel but being able to give a % + or- for 6th gear is great for ram air and air density tuning on topend runs...
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dubious
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posted September 02, 2007 05:11 PM
Hey guys, after playing with the pump accelerator feature what settings have you finalised with?
Finally got the pc3 to take firmware updates and new software for the lcd and hub....
Now I will be getting somewhere with all this stuff.
-Output 1 in the hub will trigger nos map #2 with nos using window switch in series
-Output 2 in hub will trigger air shifter and shift light.
Both the nitrous and airshifter will have bypass switches each in parallel with the auto cct's allowing manual operation, and a main power switches to turn them off completely.
-Pressure input voltage will actually be tied into wideband 02 sensor to keep an eye on potential meltdowns, and aid in tuning.
Already wired the msd 2 step , with inline switch to turn it on or off.
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87gtNOS
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posted September 04, 2007 10:12 AM
dubious, I have actually disabled my accel feature. I had it on for almost a month and tried all kinds of things, but have decided it was doing f-all.
I think it is more meant for if you had a bigbore or something.....
My friend had the accel pump turned on on his Yammy sled and his idle a/f was richer. Something is just not right with the accel feature, IMO.
____________
01 ZX12R
07 ZX14 - YEAH BABY!
03 ZX9R-traded in for the 14!!! June 07!
05 636-traded in for the 9 Sept 05
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