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Thread: How to make your fuel and timing maps AKA "TP/LOAD" scales

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Posts: 11-20 of 193
2013-02-25 21:23:50
#11
You're not following me. I'll try to explain better with an example.

Do a 3rd gear pull, wide-open-throttle with a naturally aspirated engine and log TP and MAP data from 1,000 RPM to 7,500 RPM.

Results:

RPM ... ... ... MAP ... ... ... TP
1,000 ... ... . 100 kPa ... ... 30
1,500 ... ... . 100 kPa ... ... 33
2,000 ... ... . 100 kPa ... ... 36
2,500 ... ... . 100 kPa ... ... 40
3,000 ... ... . 100 kPa ... ... 45
3,500 ... ... . 100 kPa ... ... 50
4,000 ... ... . 100 kPa ... ... 55
4,500 ... ... . 100 kPa ... ... 58
5,000 ... ... . 100 kPa ... ... 60
5,500 ... ... . 100 kPa ... ... 62
6,000 ... ... . 100 kPa ... ... 60
6,500 ... ... . 100 kPa ... ... 58
7,000 ... ... . 100 kPa ... ... 54
7,500 ... ... . 100 kPa ... ... 50



Now tell me what you're doing again, and how it works?
2013-02-25 21:28:42
#12
I'll do you one better heres an actual log from my own car this is just a brief sample of it. This is a stock NA MAP sensor here although it will still read a little bit of boost, but reading boost isnt as important to me, known when I hit zero vacuum zero boost is for now, ofcourse later i'll be installing my GM 3bar map sensor so that I can gain higher resolution up to 20psi is need be this one wont in this log below wont read past 6psi but thats not important for what im teaching/showing here.

Dont pay attention to the low timing values in the vacuum area I have a bad TPS sensor that drops out and the ECU does a bunch of funny things when this happens.

Last edited by UNISA JECS on 2013-02-25 at 21-34-04.
2013-02-25 21:31:17
#13
That's not the log you meant to post, is it?
Even ignoring the TPS column and assuming WOT, it shows nothing of value since MAP readings are not in it. However, it does show as I've stated that TP does not stay constant (again, ignoring TPS data as you said I should and assuming WOT).
Last edited by BenFenner on 2013-02-25 at 21-38-44.
2013-02-25 21:40:22
#14
Ben youre being too literal...

His relationship is obviously only true at on a WOT scale. Not for normal around town partial throttle driving. At WOT with no changes in your MAP nor Load (eg dyno), its quite likely TP readings will be consisent... thats my experience
2013-02-25 21:43:22
#15
Originally Posted by BenFenner
That's not the log you meant to post, is it?
Even ignoring the TPS column and assuming WOT, it shows nothing of value since MAP readings are not in it. However, it does show as I've stated that TP does not stay constant (again, ignoring TPS data as you said I should and assuming WOT).


Mr BenFenner im trying to teach you all something here, look at colum "R" that is clearly labled "BOOST" that is my MAP sensor that I use for logging and I have the voltage to pressure relationship for it, its accuarte for all throttle situations its infinit it'll read all vacuum and boost readings withing its operating range.
Last edited by UNISA JECS on 2013-02-25 at 21-45-11.
2013-02-25 21:47:07
#16
Originally Posted by blo0d
Ben youre being too literal...

His relationship is obviously only true at on a WOT scale. Not for normal around town partial throttle driving. At WOT with no changes in your MAP nor Load (eg dyno), its quite likely TP readings will be consisent... thats my experience


Your wrong my friend it works in closed loop open loop and hula hoop vacuum crusing and boost smashing out, it is very valuable especially in the transitional period of low vacuum into low boost area.
2013-02-25 21:47:32
#17


From your data...
2013-02-25 21:52:57
#18
Originally Posted by wnwright


From your data...


Your always going to get noise but if you follow the trend you'll see and know what to do with it. this is all but 4.3 seconds of log info, this log is like 15 minutes long of whatever BS driving around, just a sample.
2013-02-25 21:57:07
#19
Originally Posted by UNISA
Originally Posted by blo0d
Ben youre being too literal...

His relationship is obviously only true at on a WOT scale. Not for normal around town partial throttle driving. At WOT with no changes in your MAP nor Load (eg dyno), its quite likely TP readings will be consisent... thats my experience


Your wrong my friend it works in closed loop open loop and hula hoop vacuum crusing and boost smashing out, it is very valuable especially in the transitional period of low vacuum into low boost area.


Now youve lost me... But youve been logging since 08. So I bet youve got it all figured out.

I do think it would be a good tool though for creating MAPs on dynos.
2013-02-25 22:03:03
#20
Originally Posted by blo0d
Originally Posted by UNISA
Originally Posted by blo0d
Ben youre being too literal...

His relationship is obviously only true at on a WOT scale. Not for normal around town partial throttle driving. At WOT with no changes in your MAP nor Load (eg dyno), its quite likely TP readings will be consisent... thats my experience


Your wrong my friend it works in closed loop open loop and hula hoop vacuum crusing and boost smashing out, it is very valuable especially in the transitional period of low vacuum into low boost area.


Now youve lost me... But youve been logging since 08. So I bet youve got it all figured out.

I do think it would be a good tool though for creating MAPs on dynos.


I am a rolling dyno without dyno numbers.




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