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Throttle Breakpoints. (Read 9878 times)
Bobd
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Throttle Breakpoints.
09/05/12 at 18:20:04
 
Sorry if this all a bit slow and laborious – it’s my nature, try talking to me in real life!
I am having problems understanding the TPS breakpoints on the map, in particular the map statement "This defines the throttle breakpoints. This on top of TPS base above".
I understand the breakpoints are from the conversion of the millivolt output by the TPS. 0volt = 0TPS and 5volt =  1024TPS. (Or possibly 1 to 1023 to be pedantic)
Although one would think WOT = 1024TPS,  mine is nearer 980.  Is this just the result of an inevitable voltage drop to and from the TPS or possibly due to the fact one has  rotated the TPS rheostat on the throttle body to set the base 150Mv and so the rheostat never turns far enough to give zero resistance and so the true 5v output.
The SPORT.ECU map shows the TPS breakpoints as:- 0,64,128,192,256,320,384,448,512,576,40,704,832,96,960.
I noticed that the MyEcu Controller, when set to ‘Throttle Breakpoints’ and with a TPS of 101, displays them as :-
101, 165, 229 etc.  That is of course in line with the   “……. This on top of TPS base above" statement.
This makes  Row 14 @ 997 and Row 15 @ 1061.
AS my WOT is only 980 does this mean I never enter the top two rows and so never get full power?

Cliff, I recall you advising me not to worry about the Throttle Breakpoints , perhaps that was just during the initial set-up.


Edit.  The '40' and '96' should of course read 640 and 896.  Typo.
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« Last Edit: 09/06/12 at 21:28:08 by Bobd »  
 
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Re: Throttle Breakpoints.
Reply #1 - 09/06/12 at 08:47:07
 
There look to be some errors in your line " 0,64,128,192,256,320,384,448,512,576
,40
,704,832,
96
,960"

but basically you are correct. You could close the gap in those top rows.
If you change them in the ECUController it should recalculate the cell entries so that the map does not change but always do a visual comparison in notepad between old and new maps to see  if the changes are as expected.
There are some nice differencing tools to help. I think one was called Meld.
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Bobd
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Re: Throttle Breakpoints.
Reply #2 - 09/06/12 at 21:37:53
 
So set the upper breakpoints, say to 940 and 980. Am I correct in assuming the InjDur etc will stay the same for the map cells, and that I have only changed the throttle setting at which I enter these cells.
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« Last Edit: 09/07/12 at 17:40:38 by Bobd »  
 
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Re: Throttle Breakpoints.
Reply #3 - 09/07/12 at 07:48:20
 
There are two ways. You can change the throttle in notepad and the rest of the map is unchanged.  BUT the bike will see differences.
The other way is you use the ECUController to change the throttle. It makes adjustments to the cells such that the bike will not see any difference.
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Re: Throttle Breakpoints.
Reply #4 - 09/07/12 at 18:42:22
 
Cliff,
So my base is set at 35 (WOT is 975) and 8500 rpm, but in the global map adjust it shows a my base @ 35, WOT @ 931 and rpm @ 500 to 8012 is this ok.
Can't work out why my base is so low but that is the only way I can get it to idle at around 1200 rpm using Mad's map. Step up using the stock ECU, balanced and trimmed I get 54 tps but with Mad's map it idles at 2000rpm.
Sorry if I have hi-jacked ya thread Bobd Wink 
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Re: Throttle Breakpoints.
Reply #5 - 09/08/12 at 07:04:31
 
There are two possible issues. One is it actually idles up at 2000RPM, the other is that it will idle at 1100 but if you blip the throttle it does not come back down.

You should send me the map from the ECU and also capture a log of it idling so i can check it out.
What are your air bleed screws set to?
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Re: Throttle Breakpoints.
Reply #6 - 09/09/12 at 16:01:48
 
Cliff,
My bleed screws are only half a turn out and the left one is even less. When I balanced them I used the sync screw at 2500 rpm to get it right then at idle I adjusted the left bleed screw to get it right at idle.
This is the only procedure that differs from the maint manual "maybe this is my problem", will redo the balance.
I would idle at 2000 rpm's then i leaned off the bottom cells and get the idle reasonable with the idle screw but when I blipped the throttle it would do as you said jump up to 2000 rpm again Shocked. Also when it's cold it's a real bugga to start, some times it takes 4 to 5 goes, but hot it starts good. SPORT.ecu map would pop heaps on decel and idle was all over the place.
I will redo the balance then see how it goes.
One other thing and I know the the name of the taco, it's Vague Liar Grin, but mine reads about 300 rpm's less at idle than the ECU control and at 120 kph with the stock ECU it's doin 4000 rpm but MyECU the bikes doin 130 kph at 4000rpm.
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« Last Edit: 09/09/12 at 16:11:15 by Stinga »  

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Re: Throttle Breakpoints.
Reply #7 - 09/09/12 at 17:43:30
 
The way I balance mine is to close the air screws completely to do the balance at 2500RPM as you don't want the bleed to affect this. I then open up two turns on each and then adjust one to get the balance at idle right.

If its only the "return to idle" after a blip, then this is usually too much spark advance at the idle row on the rpms just above idle.
Idle is cell (0,1). You should lower the spark advance at cell (0,2) and (0,3) a tad.

You may have misadjusted your bike chasing down this issue. If you've got the OEM ECU, I'd recommend recalibrating it all with it.
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Re: Throttle Breakpoints.
Reply #8 - 09/19/12 at 00:16:52
 
Cliff,
Well today I put the stock ECU back into the bike and reset TPS settings and balance according to the manual except  for your suggestion on the bleed screws.
I then replaced the ECU with MyECU, hooked up the lappy, got a throttle reading of 56, reloaded Map Farquhar's maps and changed the max rpm to 8500 and throttle to 56, saved map the reloaded it.
Hit the starter and she fired up straight away and settled down to a steady idle of 1500 rpm, adjusted idle to about 1200, shut her down, rechecked and reset the new throttle position of 44 into the map and saved the map then reloaded it and restarted and it settled into a beautiful idle of 1150 to 1220  Smiley.
Suited up and took her for a spin around town then out on some back country roads. Around town it was great with none of the bullshit like the stock ECU, no stalling when stopping, Grin Grin will need to to do more trials onec I get down to Perths car parks that the gov calls freeways over here.
Out on the back roads it's real strong from way down low right up to about 7500 with no hic ups but after 7500 there are just a couple of hic ups. It's that good now that I will have to get a bumb pad put on the back of the seat to stop me sliding off the thing  Grin Grin Grin Grin Grin.
I will e-mail you the map that I am running for you to have a look at if you wish Wink, can't work out how to attach it here Undecided .
Steve


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Re: Throttle Breakpoints.
Reply #9 - 09/19/12 at 01:42:25
 
Grand feeling isn't it! Smiley
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