PCIII and throttle position %, how do I know?
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Tourer
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PCIII and throttle position %, how do I know?
So I tweaked my PCIII map but my question is how do I know what throttle position % I am at while I am riding? Cruising at 80 I am at 2700 RPMs, or so, so can I assume that I am at roughly 40% according to the speed I am going and RPM of the engine? How can I get to the bottom of this mystery in my mind?
Thanks
Thanks
Road Master
Joined: Jul 2007
Posts: 769
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From: Brooksdale, ON
RE: PCIII and throttle position %, how do I know?
you will likely be at or about 15% TPS. most of the riding that everybody does is less then 20% TPS, you only get into the higher ones when you are hard accelerating. What i did was hook up to the puter, put a peice of masking tape on the grip, in nuetral looked at the TPS and then marked the grip with a pen for every 10%, then go for a ride and see for yourself.
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Tourer
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RE: PCIII and throttle position %, how do I know?
ORIGINAL: sewerat
you will likely be at or about 15% TPS. most of the riding that everybody does is less then 20% TPS, you only get into the higher ones when you are hard accelerating. What i did was hook up to the puter, put a peice of masking tape on the grip, in nuetral looked at the TPS and then marked the grip with a pen for every 10%, then go for a ride and see for yourself.
you will likely be at or about 15% TPS. most of the riding that everybody does is less then 20% TPS, you only get into the higher ones when you are hard accelerating. What i did was hook up to the puter, put a peice of masking tape on the grip, in nuetral looked at the TPS and then marked the grip with a pen for every 10%, then go for a ride and see for yourself.
Thanks
Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
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From: Baton Rouge, LA
RE: PCIII and throttle position %, how do I know?
ORIGINAL: swipter
So I tweaked my PCIII map but my question is how do I know what throttle position % I am at while I am riding? Cruising at 80 I am at 2700 RPMs, or so, so can I assume that I am at roughly 40% according to the speed I am going and RPM of the engine? How can I get to the bottom of this mystery in my mind?
So I tweaked my PCIII map but my question is how do I know what throttle position % I am at while I am riding? Cruising at 80 I am at 2700 RPMs, or so, so can I assume that I am at roughly 40% according to the speed I am going and RPM of the engine? How can I get to the bottom of this mystery in my mind?
check-speeds (e.g., 55 mph), mark that point on the throttle grip across from the reference point. Don't use the cruise control for these checks!
When you get home, connect the computer and check those positions using the PC software. You can do it by turning on the ignition without starting the engine and attaching the 9V battery adapter, or just start the engine.
Recently, I double-checked these rough calculations with a PC LCD display I borrowed from a friend, which connects to the PCIII and among other things will display the TP on the fly. This verified my earlier findings, which revealed about 7-8% at a constant 50-60mph in 5th gear, up to about 15% at 80mph in 6th. Thus, my earlier gas-mileage tweaks largely between 5-20% were correct. Knowing this has helped me tweak my PCIII map for better mileage. For those with TC88 engines, TP may be higher at cruising speeds, so you should do your own checks. For Swipter, you should be able to use my calculations since you have an identical year and model.
A better method would be to do the test with a passenger holding a laptop computer, if that's possible.
Ultimate HDF Member
Joined: Nov 2005
Posts: 5,256
Likes: 5
From: Concord, CA
RE: PCIII and throttle position %, how do I know?
I did the same as iClick...
Tape with hash marks and later reference.
Worked very well for me.
Tape with hash marks and later reference.
Worked very well for me.
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Tourer
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RE: PCIII and throttle position %, how do I know?
ORIGINAL: iclick
I can help a bit with this. One half-*** method is to ride along at the speed you want to test and mark the position on your throttle grip. I pre-installed some masking tape before the ride and marked it on the fly with a marker. On the switch side apply some tape and make a mark, which will be your reference point. On the throttle grip apply another strip and mark 0% directly across from the previous mark, then open the throttle to 100% (engine off) and mark that point in the same manner. When you ride along at the various
check-speeds (e.g., 55 mph), mark that point on the throttle grip across from the reference point. Don't use the cruise control for these checks!
When you get home, connect the computer and check those positions using the PC software. You can do it by turning on the ignition without starting the engine and attaching the 9V battery adapter, or just start the engine.
Recently, I double-checked these rough calculations with a PC LCD display I borrowed from a friend, which connects to the PCIII and among other things will display the TP on the fly. This verified my earlier findings, which revealed about 7-8% at a constant 50-60mph in 5th gear, up to about 15% at 80mph in 6th. Thus, my earlier gas-mileage tweaks largely between 5-20% were correct. Knowing this has helped me tweak my PCIII map for better mileage. For those with TC88 engines, TP may be higher at cruising speeds, so you should do your own checks. For Swipter, you should be able to use my calculations since you have an identical year and model.
A better method would be to do the test with a passenger holding a laptop computer, if that's possible.
ORIGINAL: swipter
So I tweaked my PCIII map but my question is how do I know what throttle position % I am at while I am riding? Cruising at 80 I am at 2700 RPMs, or so, so can I assume that I am at roughly 40% according to the speed I am going and RPM of the engine? How can I get to the bottom of this mystery in my mind?
So I tweaked my PCIII map but my question is how do I know what throttle position % I am at while I am riding? Cruising at 80 I am at 2700 RPMs, or so, so can I assume that I am at roughly 40% according to the speed I am going and RPM of the engine? How can I get to the bottom of this mystery in my mind?
check-speeds (e.g., 55 mph), mark that point on the throttle grip across from the reference point. Don't use the cruise control for these checks!
When you get home, connect the computer and check those positions using the PC software. You can do it by turning on the ignition without starting the engine and attaching the 9V battery adapter, or just start the engine.
Recently, I double-checked these rough calculations with a PC LCD display I borrowed from a friend, which connects to the PCIII and among other things will display the TP on the fly. This verified my earlier findings, which revealed about 7-8% at a constant 50-60mph in 5th gear, up to about 15% at 80mph in 6th. Thus, my earlier gas-mileage tweaks largely between 5-20% were correct. Knowing this has helped me tweak my PCIII map for better mileage. For those with TC88 engines, TP may be higher at cruising speeds, so you should do your own checks. For Swipter, you should be able to use my calculations since you have an identical year and model.
A better method would be to do the test with a passenger holding a laptop computer, if that's possible.
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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
I did the same as iClick...
Tape with hash marks and later reference.
Worked very well for me.
I did the same as iClick...
Tape with hash marks and later reference.
Worked very well for me.
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
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.
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