| Author | Message | ||
     Frankenstein |
Guys, I am looking for a PCIII map for an XB12 with Buell race kit (filter, exhaust, ecm) and dynojet O2 sensor installed. Anybody that has that configuration and a custom map for the PCIII? Thanks! | ||
| Fullpower |
frank, you should not need a pc or a map. the race kit is designed to function properly on a stock motor. what issue or problem are you trying to address? | ||
| Frankenstein |
I am ready to play with different air-box designs as well as header pipe modifications and I will only start if I have a solid baseline map for a PCIII. Even the Race ECMs mapping is not perfect. I hooked up an AF meter and it shows that there are several spots in the rpm range where the mixture is not in the perfect 12.9 to 13.5 AF range. I have been using PCIIIs on other bikes and every time even a stock or mild modified bikes improved with a custom map. I will eventually build a custom map but it would have been nice if somebody had done the baseline work already. | ||
| Opto |
Frank, I'm thinking seriously about trying the Megasquirt EFI and running it side by side with the Buell ecm which will continue to run spark, tacho, fan, engine check light ie fully functional, but switch in dummy loads for the injectors when the Megasquirt EFI is controlling the fuel. As long as the tps and O2 sensor can run both processors simultaneously it should be possible. There are other issues, but the end result of a user adjustable EFI map is quite feasible. I considered the PCIII but feel it is a bandaid solution that makes the ecm fight itself - eg it's trying to lean out and the PCIII keeps richening it up, the "learning" bit of the ecm goes haywire. I've never used a PCIII, so take that statement appropriately. I'm also skeptical about this "learning" thing about DDFI, how can a microprocessor take engine operating parameters in closed loop mode and then extrapolate that info to run open loop WOT? Is it really doing this? For a performance bike as opposed to a commuting bike, wouldn't a well set up open loop system be fine? Just like a carby is an open loop setup. Please wish me luck if I take on this possibly dubious but perhaps rewarding project. | ||
| Frankenstein |
I am familiar with the PCIII and know how to tweak it. In order to make it work you also need a new O2 sensor as the stock one is too inaccurate. I am currently waiting for my Wideband Commander order from Dynojet. With it I will finally have the most detailed A/f ratio, rpm, tps analysis I want built into my bike. No more dyno needed to adjust the fuel map. Just get on a straight get into whatever gear you like, push the record button and do a couple runs from 2000 rpm to redline with different throttle positions. The Wideband Commander records tps, rpm and AF ratio and you can take the input and apply it to the PCIII. We shall see how it works. | ||
| Captainplanet |
Frankenstein, Just in case you don't know about this tool. Of course, it will not directly plug in to a PCIII, but seems to be a good tuning tool at a pretty reasonable cost. http://www.innovatemotorsports.com/ | ||
| Misato |
thats cool.. I'll volunteer my bike for testing!!  how much was that bad boy? | ||
| Frankenstein |
Captainplanet, I am using a similar one. The Wideband commander has the same accuracy but comes with an AF gauge you mount on the bike. It tells you what you are currently running on. In addition it records up to 6000 data points at up to 10 times per second in combination with rpm and tps and lets you plot the a/f curve on the computer for detailed analysis. That's what you need to get quickly to an optimal fuel map for all throttle positions and rpms. | ||
| Fullpower |
daves is working on an open loop atmospheric fuel/air venturie induction system for the XB. i think it uses brass metering orifices, and possibly even a buouncy compensating fuel level control device. it is cable operated, controlled strictly by operator's right wrist. no ECM needed. we are anxiously awaiting the results of the first road test. | ||
| Captainplanet |
Frankenstein The unit I mentioned has a mountable meter that records too. It is extra though. I think it can cover the other things as well. What is the cost of the one you are using? | ||
| Frankenstein |
The Wideband commander is about $500 bucks | ||
| Frankenstein |
So nobody running a PCIII out there? | ||
| Easyflier |
Frank, yes on my XB9R so I don't imagine it would help you much. I can tell you that it ran fine for the week or so it took to get it mapped with the X1 map that came in it. With an A/F meter I'm sure that you could fine tune it pretty well without a trip to the dyno. | ||
| Udo_hsa |
Hi Frank i have written an Map for an XB9 an it is running well Udo | ||
| Frankenstein |
Guess I will have to build my own XB12 map from scratch. Will let you know how it goes. |
