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

csv -> txt

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Edit: I also found some other correlated data that you may find interesting.

http://i.imgur.com/7bE8unP.jpg

I think what BenFenner is really questioning is this post and that it is impossible, on a Nissan MAF'ed car, to know exactly what TP = PSI/KPA. I can vouch for this first hand too. Like say on my B15 at 7 psi, I will be at 80 TP at 4,000 RPM, but by 7,000 RPM I'm at 70 TP. I'm still pushing the same 7 psi, but I can't tell you what TP column I am exactly because it changes with the RPM's.



Also BenFenner knows a thing or two about real ECU tuning (Standalones)

Seriously guys like I said when I wrote this But dont go thinking X amount TP = X amount PSI on your car or anyone elses car, its all different, TP is what you should be changing to make your MAPS, dont rely on automatic TP adjustments they only get you in the ballpark, I get you in the strike zone.


Maybe I should have said it like this, for every individual tune you can correlate TP with Boost by using a MAP sensor as a logging tool. Ofcourse X amount of TP is not going to equal the same amount of boost from one car to another using a stock MAF on one and another using a Z32 MAF so many things change what your TP will be for your specific ECU and I only named one.

I think we understand. We are just saying that is not possibly correct.

Get your setup in order and log TP across the entire rev range and compare it to your pressure readings and you'll see what we mean. It will be harder to tell on a boosted motor because you won't have a steady pressure reading until later in the rev range but it should still be obvious. If, for whatever reason, you do get results that corroborate your theory, that simply means your torque plateau extends from full boost onset to redline on your setup.

An N/A setup would be much better for this test.
It is a shame that TP logs or graphs are so damn hard to find on the Internet.

I'm not sure your getting what we are trying to say. We are not even talking about correlating TP/Boost from one car to another, we are talking about one the exact same car, TP != Boost pressure. TP follows a torque curve, thus changes through RPM range, while boost pressure should stay constant at all times (if your car is mechanically sound).

Your Log #3 actually is a perfect example of what we are talking about. If you look at all of the rows with 6 psi as the boost pressure you will see your TP go from 65 TP to 88 TP. This is what we are talking about though it's impossible to really exactly correlate a TP to boost, you can get ranges, but that's about it.

You can say at 6 psi, I should be between 50 TP and 100 TP, but when your whole map is only 100 TP, it's like saying the cancer could be in your toes or in your brain, lets cut the lungs out.

Those 6's are just the MAP sensor hitting it's max pressure limit for reading and giving false data. You can't trust his logged MAP sensor data above atmospheric, because the MAP sensor is a 1.1-Bar sensor or whatever.

From what I am garnering, TP is simple load, correct??

Uhhh yeah that's a waste of time then. Point remains TP != pressure



TP is a complicated way of doing engine load. But simply put it is load, and it determines what column you will be in to use what fuel

Formula:
TP = (VQ x K Value / CAS Value) / Number of Cylinders

What?
No.
TP is not "load" (just another term synonymous with intake pressure) at all. Never has been, and never will be.