PCIII and throttle position %, how do I know?
Ultimate HDF Member
Joined: Nov 2005
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From: Concord, CA
RE: PCIII and throttle position %, how do I know?
ORIGINAL: iclick
Rhubarb, where've you been, buddy? I saw a few posts you've made recently, but you disappeared for a while. I see you're still loosing the race to the kid on the Softail.
Rhubarb, where've you been, buddy? I saw a few posts you've made recently, but you disappeared for a while. I see you're still loosing the race to the kid on the Softail.
Things have slowed down a bit, so I get to come back.
I guess the summer treated you well with your tuning? How did the timing changes work out?
That kid is damn fast! I'm thinking of putting some cams in the R-.50 to catch him, but Harleys just run circles around my sport bike.
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Joined: Sep 2005
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From: Baton Rouge, LA
RE: PCIII and throttle position %, how do I know?
ORIGINAL: Rhubarb
I guess the summer treated you well with your tuning? How did the timing changes work out?
I guess the summer treated you well with your tuning? How did the timing changes work out?
Last summer I advanced the timing 5° in the cruise range and heard detonation only once, but didn't see a change in mileage, so I changed them back to zero. On this most recent map I have it advanced 3° in the cruise range and so far no problems. This might need to be changed in summer when things heat up, but for now no ping.
Last summer I installed a PC multifunction hub and map switch, which allows me to switch between two maps on the fly. This has been a good option, as I can run extra lean for mileage and switch to the original rich map at any time, like when it gets hot and slow in summer traffic.
Ultimate HDF Member
Joined: Nov 2005
Posts: 5,256
Likes: 5
From: Concord, CA
RE: PCIII and throttle position %, how do I know?
Wow, that is a lot of testing.
That module you bought would drive me nuts. I'd be forever switching tunes.
I wonder if you could adapt a couple wide band O2 sensors to some type of logging software.
There are basic circuit boards with computer chips (basic stamp comes to mind) that you can write your own simple code for.
It could easily log the data from an O2 sensor.
That module you bought would drive me nuts. I'd be forever switching tunes.
I wonder if you could adapt a couple wide band O2 sensors to some type of logging software.
There are basic circuit boards with computer chips (basic stamp comes to mind) that you can write your own simple code for.
It could easily log the data from an O2 sensor.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
RE: PCIII and throttle position %, how do I know?
ORIGINAL: Rhubarb
Wow, that is a lot of testing.
That module you bought would drive me nuts. I'd be forever switching tunes.
I wonder if you could adapt a couple wide band O2 sensors to some type of logging software.
There are basic circuit boards with computer chips (basic stamp comes to mind) that you can write your own simple code for.
It could easily log the data from an O2 sensor.
Wow, that is a lot of testing.
That module you bought would drive me nuts. I'd be forever switching tunes.
I wonder if you could adapt a couple wide band O2 sensors to some type of logging software.
There are basic circuit boards with computer chips (basic stamp comes to mind) that you can write your own simple code for.
It could easily log the data from an O2 sensor.
There are many A/F gauges out there, but the good ones that show numerical A/F ratio are expensive (>$250), although there are cheaper units (~$50) that give you a generalized readout, like "lean," "stoich," "rich," etc.--but that is worthless to me.
Ultimate HDF Member
Joined: Nov 2005
Posts: 5,256
Likes: 5
From: Concord, CA
RE: PCIII and throttle position %, how do I know?
0-1v eh?
Hmm, that sounds like a NB sensor, but it's been while since I looked at that stuff since my bike doesn't have sensors and i gave up my dreams of performance on my truck.
I think it's going to cost around $250-300 almost no matter what once you get into connectors, cables, a logging method, etc... but you never know.
I'll ask some friends for their input.
Hmm, that sounds like a NB sensor, but it's been while since I looked at that stuff since my bike doesn't have sensors and i gave up my dreams of performance on my truck.
I think it's going to cost around $250-300 almost no matter what once you get into connectors, cables, a logging method, etc... but you never know.
I'll ask some friends for their input.
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Tourer
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RE: PCIII and throttle position %, how do I know?
ORIGINAL: iclick
Concentrate on 5-10%, where you can lean it quite a bit, but keep it not-quite-so-lean at 20%. Going too heavy on the leanness at 20% may cause a flat spot, but just try it and go by the seat of your pants. If you start getting some surging at light throttle when cold, you may want to back off a bit. I went with -10's in most of the cruise range for a while and had some surging when cold and hesitation on one occasion, so my latest tweak is richer with -5's, and the surging is all but gone. This may be the sweet spot with these Rush mufflers with the custom Fuel Moto baffles.
Which baffles do you have and what does your map look like? Attached is my before (3a) and after (3b). Keep in mind that 3a is an advanced map, tuned for each cylinder individually, so the other cylinder will look a bit different. I changed 3b to the same values for both cylinders, however. I also may change the "10" and "9" values at 20% to "5" and see how it goes. I don't think it needs to be that much richer than 10% at that point, but at 20%/3k you could justify more fuel, as at a cruise this would be about 80 mph in 6th gear.
BTW, keep in mind that the PCIII interpolates between settings. IOW, if you have "0" for 10% TP and "10" for 20%, it will run "5" at 15%, etc.
[IMG]local://upfiles/4327/942D5C6EE0984014A02E1F9B795C6C75.jpg[/IMG]
ORIGINAL: swipter
Thanks iclick, I think the tweaks I have been making, although helpful for about 1.5 mpg are just a tad high for TP%. I was thinking I was higher in the percentage. I will go back and retweak as soon as I replace my power supply for the computer. Thanks for the help, all.
Thanks iclick, I think the tweaks I have been making, although helpful for about 1.5 mpg are just a tad high for TP%. I was thinking I was higher in the percentage. I will go back and retweak as soon as I replace my power supply for the computer. Thanks for the help, all.
Which baffles do you have and what does your map look like? Attached is my before (3a) and after (3b). Keep in mind that 3a is an advanced map, tuned for each cylinder individually, so the other cylinder will look a bit different. I changed 3b to the same values for both cylinders, however. I also may change the "10" and "9" values at 20% to "5" and see how it goes. I don't think it needs to be that much richer than 10% at that point, but at 20%/3k you could justify more fuel, as at a cruise this would be about 80 mph in 6th gear.
BTW, keep in mind that the PCIII interpolates between settings. IOW, if you have "0" for 10% TP and "10" for 20%, it will run "5" at 15%, etc.
[IMG]local://upfiles/4327/942D5C6EE0984014A02E1F9B795C6C75.jpg[/IMG]
Great chart BTW. More knowledge for me to use on my PCIII.
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
RE: PCIII and throttle position %, how do I know?
ORIGINAL: swipter
If you are in 6th at 2500 RPM and slow down, down shift to 5th and still at 2500 RPMs, is it reasonable to say that you should still be at the same TP%?
If you are in 6th at 2500 RPM and slow down, down shift to 5th and still at 2500 RPMs, is it reasonable to say that you should still be at the same TP%?
Great chart BTW. More knowledge for me to use on my PCIII.
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Extreme HDF Member
Joined: Sep 2005
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From: Baton Rouge, LA
RE: PCIII and throttle position %, how do I know?
ORIGINAL: Rhubarb
0-1v eh?
Hmm, that sounds like a NB sensor, but it's been while since I looked at that stuff since my bike doesn't have sensors and i gave up my dreams of performance on my truck.
I think it's going to cost around $250-300 almost no matter what once you get into connectors, cables, a logging method, etc... but you never know.
I'll ask some friends for their input.
0-1v eh?
Hmm, that sounds like a NB sensor, but it's been while since I looked at that stuff since my bike doesn't have sensors and i gave up my dreams of performance on my truck.
I think it's going to cost around $250-300 almost no matter what once you get into connectors, cables, a logging method, etc... but you never know.
I'll ask some friends for their input.
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