Author Topic: jerky off-on throttle ->PC V? (Read 13217 times)

martin_14 · « **on:** July 02, 2013, 09:29:32 AM »

Is there any function in the PC V that allows to tame the jerkiness of the throttle when going from closed to open? It's making me mad

VirginiaJim · « **Reply #1 on:** July 02, 2013, 10:54:58 AM »

I don't think I've heard of that 'mod' with the PC V. However, the throttle tamer and properly adjusted cables help alleviate that.

gPink · « **Reply #2 on:** July 02, 2013, 11:25:41 AM »

Quote from: VirginiaJim on July 02, 2013, 10:54:58 AM

I don't think I've heard of that 'mod' with the PC V. However, the throttle tamer and properly adjusted cables help alleviate that.

what he said^^^

PH14 · « **Reply #3 on:** July 02, 2013, 01:21:22 PM »

Quote from: VirginiaJim on July 02, 2013, 10:54:58 AM

I don't think I've heard of that 'mod' with the PC V. However, the throttle tamer and properly adjusted cables help alleviate that.

That is a shame. I had a Power Commander for my RC51 and the map I had for it did a great job of smoothing out the original "on/off" throttle.

gPink · « **Reply #4 on:** July 02, 2013, 02:44:22 PM »

You can go in and change the fueling cell by cell.

PH14 · « **Reply #5 on:** July 02, 2013, 03:15:19 PM »

Quote from: gPink on July 02, 2013, 02:44:22 PM

You can go in and change the fueling cell by cell.

That sounds like the PowerCommander.

VirginiaJim · « **Reply #6 on:** July 02, 2013, 03:39:11 PM »

Well, just because I haven't heard of something doesn't mean it doesn't exist........or does it?

gPink · « **Reply #7 on:** July 02, 2013, 04:05:22 PM »

Quote from: PH14 on July 02, 2013, 03:15:19 PM

That sounds like the PowerCommander.

Isn't that what we're talking about? ...or am I confusing myself again?

VirginiaJim · « **Reply #8 on:** July 02, 2013, 04:29:52 PM »

Yep. Power Commander V (5)

maxtog · « **Reply #9 on:** July 02, 2013, 06:02:03 PM »

Quote from: gPink on July 02, 2013, 02:44:22 PM

You can go in and change the fueling cell by cell.

With that flexibility, yes, one can change the throttle response somewhat by adjusting the mix in increments... but you still can't control the amount of AIR going in- that is purely mechanical. So there is less control than one might think. A "throttle tamer" can do that for you (a replacement under-grip thing) mechanically. An electronic throttle (drive by wire) makes those adjustments super easy, assuming it is programmable (which of course it would not be, since manufacturers don't give owners that type of flexibility).

One gets used to some of it... but it was quite apparent to me when coming from a ZRX, which didn't have this issue. Even now, to me, it is still annoying.

Also some of the apparent fight will be from the secondary butterflies, if those have not been removed. Without a PCV, the Ghul flash will "disable" the 'flies, but I don't think their map has any throttle response changes to the curve.

marku8a · « **Reply #10 on:** July 02, 2013, 07:38:56 PM »

A Power Commander did the trick for my CBR 929.

For the C14, just adjusting the cables was a huge improvement. I later added a Throttle Tamer, removed the flies and added a PC V. This made the transitions even smoother. The last mods I made at about the same time so I can't tell you which one made the most improvement.

Mark

PH14 · « **Reply #11 on:** July 02, 2013, 08:44:55 PM »

Quote from: gPink on July 02, 2013, 04:05:22 PM

Isn't that what we're talking about? ...or am I confusing myself again?

Sorry for the confusing post.

Barry · « **Reply #12 on:** July 04, 2013, 06:15:32 AM »

I did all the mods in question in the following order...

1. purchased bike with PC-V, Autotune, flys out, air filter, full Area P exhaust

Throttle was EXTREMELY notchy, or on/off at part throttle.

2. Adjusted cables properly, still very notchy.

3. Adjusted map for fuel economy below a specific % of throttle open and below a particular RPM. That got me fuel economy, didn't help with the on/off. I didn't expect it to, and I did this with the guidance of the tuner that provided the original map to the previous owner.

4. Spent $90 on a throttle tamer. OMG. Best money I have spent hands down. All issues solved.

Regards,
Barry

PH14 · « **Reply #13 on:** July 04, 2013, 10:41:00 AM »

Quote from: Barry on July 04, 2013, 06:15:32 AM

I did all the mods in question in the following order...

3. Adjusted map for fuel economy below a specific % of throttle open and below a particular RPM. That got me fuel economy, didn't help with the on/off. I didn't expect it to, and I did this with the guidance of the tuner that provided the original map to the previous owner.

Regards,
Barry

Yes, mapping for fuel economy won't help the on/off issue. With the right map, a throttle tamer isn't necessary.

maxtog · « **Reply #14 on:** July 04, 2013, 12:09:05 PM »

Quote from: PH14 on July 04, 2013, 10:41:00 AM

Yes, mapping for fuel economy won't help the on/off issue. With the right map, a throttle tamer isn't necessary.

I don't agree with that, as per my last posting. The map can only adjust the amount of fuel injected, it cannot control the amount of air coming from a certain throttle position. Thus, you can trim it a little with lean/rich, but you can't change the vast majority of throttle control. A "Throttle Tamer" does do that by changing the amount of throttle opening depending on the amount turned of the handlebar throttle (it is like a new mechanical "map").

Daytona_Mike · « **Reply #15 on:** July 04, 2013, 04:49:31 PM »

'With the right map, a throttle tamer isn't necessary.'
That is a correct statement. Something is not correct with the PCV or the bike itself. Either the map is incorrect or the PCV is not setup properly.
Where did you get this map for the PCV? Why do you have a PCV? Have you had it properly tuned on a dyno so you can see the a/f ratio?
Did you calibrate Throttle position?
You can get an Autotune but it can only help if you fuel maps are close to correct and not way off.
This is where you can try and fix it yourself depending on if your going rich or lean on throttle open
http://www.powercommander.com/powercommander/Support/Help/wwhelp/wwhimpl/js/html/wwhelp.htm#href=3_PC5.1.26.html

maxtog · « **Reply #16 on:** July 04, 2013, 05:06:55 PM »

Quote from: Daytona_Mike on July 04, 2013, 04:49:31 PM

'With the right map, a throttle tamer isn't necessary.'
That is a correct statement.

Depending on exactly what is meant by "jerky off-on throttle" it might be correct or it might not be.

Daytona_Mike · « **Reply #17 on:** July 04, 2013, 05:24:22 PM »

You maybe right. I can be jerky on the throttle or I can roll on really smooth.
I found the stock C14's kinda sloppy feeling with the throttle at roll on roll off.
Mine is great with no hesitation, just gotta be careful and smooth with that right hand. I have full AreaP, flies removed and PCV with AutoTune. It is a nice setup.

martin_14 · « **Reply #18 on:** July 05, 2013, 09:15:39 AM »

I'm really not sure about the usefulness of the PC V to adress this issue, but I will look into the throttle cable adjustment. I did it only once and it took a minute, and I recall there being a definite improvement. Still, I was hoping for some more enlightment regarding what the Power Commander can do or not, and why.
BTW, flies are off. Sorry I forgot to mention that, but I'm on the road (in Riga, capital of Latvia, since you ask) and posting from my tablet is a pain in the... welll... difficult

maxtog · « **Reply #19 on:** July 05, 2013, 09:20:15 AM »

Quote from: martin_14 on July 05, 2013, 09:15:39 AM

I'm really not sure about the usefulness of the PC V to adress this issue, but I will look into the throttle cable adjustment. I did it only once and it took a minute, and I recall there being a definite improvement.

I had the same experience (definite improvement with adjustment) a few years ago (when it was new).

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Author Topic: jerky off-on throttle ->PC V? (Read 13217 times)