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

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Posts: 1-10 of 193
2013-02-25 06:00:53
#1
How to make your fuel and timing maps AKA "TP/LOAD" scales
I been using Nistune since 2008 and I though I'd just make a guide to show you how to make your maps, ofcourse all the numbers inside are just examples but the portioning of green red and blue should be followed .....

It is only possible to do this accuratly with the use of a MAP sensor for logging vacuum and boost and logging equipment such as Nistune or somehting similar and ofcourse a wideband, I use the Innovate LM-2 wideband myself....

Please feel free to ask questions or make siggestions, this is how I tune my own car and it works great.

This is pretty much what Honda has with Hondata that makes using Hondata that easier.....If your wondering what the purpose of this is, its so you can setup up "TP/LOAD" scales with accuracy instead of guestimations, basically what this is doing is assigning a "pressure" measurement a "LOAD/TP" value to work with.



Thats also a good idea, i'll post another way very similar to what you suggest:



2013-02-25 20:26:47
#2
I don't see how relevant a Honda's Map fuel injection strategy has with Nissan's Maf system, it's an apple to kiwi comparision.
2013-02-25 20:33:48
#3
^^ The only way it will be applicable is if you know what TP on the x scale of the Nissan ECU correlates to on a MAP based Honda system...........

In order words, @KillerKrossover is correct, almost useless

However, John is coming up with a MAP based driven update for the NEMU setup, so this writeup may be applicable in the future
2013-02-25 20:44:25
#4
Originally Posted by 5speed
I don't see how relevant a Honda's Map fuel injection strategy has with Nissan's Maf system, it's an apple to kiwi comparision.


You obviously dont understand what im doing here or maybe because I wasnt that clear when I wrote this sentence

"It is only possible to do this accuratly with the use of a MAP sensor for logging vacuum and boost and logging equipment such as Nistune or somehting similar and ofcourse a wideband, I use the Innovate LM-2 wideband myself...."

Originally Posted by Boostlee
^^ The only way it will be applicable is if you know what TP on the x scale of the Nissan ECU correlates to on a MAP based Honda system...........

In order words, @KillerKrossover is correct, almost useless

However, John is coming up with a MAP based driven update for the NEMU setup, so this writeup may be applicable in the future


And you my friend do have a clue.
2013-02-25 20:50:44
#5
I know exactly what TP correlates to what psi, kpa, in/hg etc etc etc whatever floats your boat, I log a MAP sensor through my Innovate LM-2 Wideband into Nistune and is injected into Consult data stream directly against all the consult registry's, I been doing this since the very begining since I had Nistune and my LM-2 in 2008, it takes literally an hour or less to make a good map, its a piece of cake, timing is that hardest part in tunning.
2013-02-25 20:53:53
#6
Everybodys TP is going to be different on an individual basis but the way I tune I directly put a "FACE VALUE THAT YOU CAN USE" on "TP" in the form of "PSI" or Kpa whichever you like to tune by, im alot more familiar with PSI so I use PSI.
2013-02-25 20:57:29
#7
So after you are able to do a run and log your boost and vacuum along side TP, you then can design your FUEL, TIMING, VOLUMETRIC MAPS based on the findings of what vacuum and boost readings correlate to TP, its elementary.
2013-02-25 21:01:32
#8
^^ That is correct

Any more write ups on your conversion from TP to psi for example? When I setup a new MAP. I try my best to figure what TP correlates with load (or pressure in psi) and go from there

The more I look on things, the more I am realizing how much better a MAP/IAT setup is than a MAF.............direct correlation
Last edited by Boostlee on 2013-02-25 at 21-03-51.
2013-02-25 21:03:01
#9
There is no direct conversion from Theoretical Pulsewidth to a pressure reading. You can maintain the same pressure from idle to redline and the TP will vary a great amount throughout the entire rev range. They are not comparable. I do not see how this technique could possibly work well.
Last edited by BenFenner on 2013-05-31 at 15-58-50.
2013-02-25 21:14:19
#10
Originally Posted by BenFenner
There is no direct conversion from Theoretical Pulsewidth to a pressure (or load) reading. You can maintain the same pressure/load and TP will vary throughout the entire rev range. They are not comparable. I do not see how this technique could possibly work.



You dont need a conversion or formula, you just need a map sensor and know that map sensors pressure to voltage relationship and have a Innovate LM-2 or something equivelant. One thing I have noticed since I been tunning and on all these Nissan forums is how funny people get when it comes to TP and the crazy blind techniques people use, put it this way dialing in a fuel/timing/volumetric map without doing what im talking about here is just crazyness. Thats blind tunning!
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