Tune ECU / PCV Question

scot in exile said:

I could be barking up the wrong tree here but does the PCV not fool the injectors to stay open and not closing at about 75% when needed? so for modified bikes and high speed bikes is the PCV not needed or beneficial at the least?

Click to expand...

Claviger said:

It's a simplified version, using a gauge for human feedback instead of a computer. The colors are the interface to parallel the age table of the PC software.

It is, in almost all regards, a PC, with a more friendly (for some people) interface using a wideband sensor in closed loop mode. It has the potential to be as accurate as a PC, sort of.

PC-V is a more powerful tuning option once you start with the optional add ons, like the timing module, data logger/display etc.

Click to expand...

Paul Bryant said:

Thanks Claviger.
As Sleeves has said above, getting a Dyno "tuner" that knows what they are doing is the problem around here.
Especially for myself when I'm building different systems and am trying them on my own bike.
Many People from around the World have said the same thing re a "Tuner"
If I can suggest to a customer to try something like the Doebeck system that is more "user friendly" meaning that they don't have to down load maps etc, or rely on a Tuner of unknown ability then this may well work for them.
I do agree with Doug that having the Bike on a Dyno, run by someone who does know what they are doing, is by far the best solution.

Click to expand...

Claviger said:

Ok so, two posts in a row, but since it's a technical discussion, I figure it's probably a good place to mention this, as people might get the idea that TuneECU makes PC-V unnecessary for Rocket 3s.

TuneECU has a maximum value that can be set in the tables. There are work arounds, but, I am not sure if they actually give more fuel or are just methods to force a bigger number in the table and the ECU doesn't know what to do with it.

Because of this maximum value, there is a limitation to the amount of horsepower that can be tuned for using exclusively TuneECU. I haven't found the exact number, but, I suspect the 160-170 range is probably around that number IF you stick with the stock injectors and pump.

This is one of the main reasosnd Tuneboy is a superior choice for high power bikes. Couple the addition of all the Tuneboy features for a tuner, and it's much more attractive than TuneECU.

PC-V is of particular interest because it's easy to find PC tuners, tunes can be edited more quickly than TuneECU or Tuneboy, can provide better table resolution than the other two options, can be leaned/richened on the fly with a POD-300, provides superior data logging to both TB/TECU, and a few other reasons.

I believe this is why most serious big power bikes run the PC-V+Tuneboy combination.

Then there is the whole reason I pulled all my tunes down, linked in my signature.

Click to expand...

Claviger said:

After reading about the dobeck, its a autotune devices that, in principle functions the same as PC-V, with the interface slightly different.

It will come with all the same "tune to AFR vs best power on a dyno" limitations. The only really significant difference is the interface, gauge and buttons vs computer, some people prefer the more analogue dobeck interface.

AFR+ Basic Functionality - Understand AFR Values, Wideband O2 Sensors, and Fuel Trim vs. Auto Tune Modes of our Fuel Controller.

Click to expand...