Didnt he also say it works best if you have a custom map? I turned mine on (using a tweaked map from DynoJet for my setup), and only thing I really noticed was a decrease in fuel mileage. Maybe after I get a custom map done I'll try it again.3D said:If you do a search for this with "Highnote" as the author, you will come up with a great deal of information. He did a bit of testing of this feature with JohnnyCheese. You'll also find write-ups of this testing on his website.
Yep, same here, that's why I turned it off, didnt impress me any.JayHawkX said:Agree with Tapper on this one, I playing around with it for awhile before deciding it doesn't even give you power it says. Waste of time and gas.
Yep, I would think that the only real use for this feature is if you purposely run a leaner map to cheat out some more mpg, but use the AccelPump for more fun when you twist the wick. Personally, I've never even bothered to activate mine.Tapper said:Actually, after fooling with this on the dyno, we've determined that it shouldn't be used on the VTX. It does not work the way you'd think it should. Most definately, if you use the factory suggested settings, your bike will run stinking rich. Don't do it.
Not meaning to split hairs with you, because your first sentence says all you need to know about the best use of the accel pump. It won't richen the entire map - only a fraction of the map. Even with the Dynojet suggested settings of 20 revolutions, that's what? - less than half a percent of the map. I totally agree that if you have a well-made map, there's no reason to mess with it.Bareass172 said:The accel pump feature of the PC3 is primarily for sportbikes with high revving motors and not a lot of vaccuum. On the VTX if you have a good map and turn the accel pump on it will richen the entire map and potentially screw up a perfectly good map. This isn't just specualtion, this is verified both by looking at maps before and after and on a dyno. :wink:
I wish that JC would chime in on this one, with all his experience he was able to explain to me -exactly- why it's not necessary on these bikes. It was designed, as I said, for sportbikes and I imagine PC just threw it out there as a "bonus" to help sell the unit. It's my understanding from what I've seen that it skews the entire map, not just a small segment of it, but having only worked with it on a limited basis I will defer to your knowledge as it seems you've experimented more with it than I have. :wink:3D said:Not meaning to split hairs with you, because your first sentence says all you need to know about the best use of the accel pump. It won't richen the entire map - only a fraction of the map. Even with the Dynojet suggested settings of 20 revolutions, that's what? - less than half a percent of the map. I totally agree that if you have a well-made map, there's no reason to mess with it.Bareass172 said:The accel pump feature of the PC3 is primarily for sportbikes with high revving motors and not a lot of vaccuum. On the VTX if you have a good map and turn the accel pump on it will richen the entire map and potentially screw up a perfectly good map. This isn't just specualtion, this is verified both by looking at maps before and after and on a dyno. :wink:
On the other hand, a good tuner like JCheese could "detune" a bike on the lean side, making it a bit more fuel-conscious and tame with moderate throttle movements, but optimize it to utilize the accel pump when you're really twisting. In other words, take away the amount of fuel from the map that the accel pump adds. Worth it? I doubt it. But as a "what if?", it's got potential.
Nah, I haven't really experimented with it at all. I have a perfectly good map from Johnny - I think I was one of the first from the Dallas area to bring my bike to him - long before they came out with the accel pump. Free is free, but I just couldn't see the benefit after Johnny had already optimized my bike. As you said, why "screw" with a perfectly good map.Bareass172 said:I wish that JC would chime in on this one, with all his experience he was able to explain to me -exactly- why it's not necessary on these bikes. It was designed, as I said, for sportbikes and I imagine PC just threw it out there as a "bonus" to help sell the unit. It's my understanding from what I've seen that it skews the entire map, not just a small segment of it, but having only worked with it on a limited basis I will defer to your knowledge as it seems you've experimented more with it than I have. :wink:3D said:Not meaning to split hairs with you, because your first sentence says all you need to know about the best use of the accel pump. It won't richen the entire map - only a fraction of the map. Even with the Dynojet suggested settings of 20 revolutions, that's what? - less than half a percent of the map. I totally agree that if you have a well-made map, there's no reason to mess with it.Bareass172 said:The accel pump feature of the PC3 is primarily for sportbikes with high revving motors and not a lot of vaccuum. On the VTX if you have a good map and turn the accel pump on it will richen the entire map and potentially screw up a perfectly good map. This isn't just specualtion, this is verified both by looking at maps before and after and on a dyno. :wink:
On the other hand, a good tuner like JCheese could "detune" a bike on the lean side, making it a bit more fuel-conscious and tame with moderate throttle movements, but optimize it to utilize the accel pump when you're really twisting. In other words, take away the amount of fuel from the map that the accel pump adds. Worth it? I doubt it. But as a "what if?", it's got potential.