NefMoto > Noob Zone > Noob Questions (Moderator: turboat) > How to calc.. ??
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usuarionuevo
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« on: January 13, 2021, 04:21:32 PM »
Hello!
I have several questions. first how to calculate the FGAT0? second krkte and fgat0 is the same?
I have seen many posts about fgat0 and none of them count how to calculate, I have an 18t m38 and I have the stock maps and a 630cc map on the 630cc map puts a FGAT0 of 0.59 and the car is doing very well .. what happens is that the formula should be according to account over there ..
210cc = 1,000 krkte
630cc =?
? = 210/630 = 0.33
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usuarionuevo
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« Reply #1 on: January 16, 2021, 05:11:20 PM »
¿?¿?¿?
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usuarionuevo
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« Reply #2 on: January 19, 2021, 01:55:48 PM »
can somebody help me Huh is that difficult to know how to calculate the KRKTE Huh
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nyet
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« Reply #3 on: January 19, 2021, 04:25:06 PM »
No. Scale it by % diff from stock, done.
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Tomas
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« Reply #4 on: January 20, 2021, 06:20:28 AM »
This is a spreadsheet I made based on information I found on this site. It will help you calculate KRKTE, TEMIN.

https://docs.google.com/spreadsheets/d/1xwaIMePy5X7IlQaZZ5ch3XdDoRsDqGXmLOBQJY0mUZ0/edit?usp=sharing

This site is awesome. In fact, you can find answers to just about everything if you look around. Hope this helps
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bamofo
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« Reply #5 on: January 20, 2021, 11:16:40 AM »
KRKTE is all written up here. you just need to use the advanced Search. Type in KRKTE and you will find it.

Its also on the s4wiki.
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usuarionuevo
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« Reply #6 on: January 25, 2021, 02:41:58 AM »
Quote from: nyet on January 19, 2021, 04:25:06 PM
No. Scale it by % diff from stock, done.


Nop. you are wrong. i set set that on the chip and car dosnt start...
stock are 210cc i put 630cc= 1.000 fgat0 = 0.33 the car dont start, only work good with 0.59 for this i have this question
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usuarionuevo
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« Reply #7 on: January 25, 2021, 02:45:32 AM »
Quote from: Tomas on January 20, 2021, 06:20:28 AM
This is a spreadsheet I made based on information I found on this site. It will help you calculate KRKTE, TEMIN.

https://docs.google.com/spreadsheets/d/1xwaIMePy5X7IlQaZZ5ch3XdDoRsDqGXmLOBQJY0mUZ0/edit?usp=sharing

This site is awesome. In fact, you can find answers to just about everything if you look around. Hope this helps

WOW N1 best post in the entire page my friend. This work very well for me7.5 but in my case the stock value of the FGAT0 is 1.000 doing the combersion, without combersion is (128) i dont know if i have to change the (Adaptation of units) of your file to adjust it... the question is this i want to understood how it work becouse i want to change injector with what i want, and that what i say stock value is (1.0000) and the 630 tune is (0.59)
« Last Edit: January 25, 2021, 05:05:09 AM by usuarionuevo » Logged
Tomas
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« Reply #8 on: January 25, 2021, 08:46:54 AM »
ME7 KRKTE is  M3/5 FGAT0 Grundanpassungsfaktor 0
Basic adjustment factor 0

Example:
Original injectors are 210cc @ 3 bar, and fuel pressure is 4 bar.
If you fit 440cc @ 3 bar injectors with 4 bar, then Grundanpassungsfaktor will be (210/440)*128 = 61 (hex) or 210/440 = 0.4772. In this example FPR is the same for both cases (4Bar FPR).
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usuarionuevo
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« Reply #9 on: January 30, 2021, 05:57:20 AM »
Quote from: Tomas on January 25, 2021, 08:46:54 AM
ME7 KRKTE is  M3/5 FGAT0 Grundanpassungsfaktor 0
Basic adjustment factor 0

Example:
Original injectors are 210cc @ 3 bar, and fuel pressure is 4 bar.
If you fit 440cc @ 3 bar injectors with 4 bar, then Grundanpassungsfaktor will be (210/440)*128 = 61 (hex) or 210/440 = 0.4772. In this example FPR is the same for both cases (4Bar FPR).


but how do you calculate the grams of n-heptane to cc/min? In the original file of the injectors it says the grams in n-heptane but then in the control unit it says a different number representing the cc/min... (KVB) which is the calculation to know how many cc/min are the grams of n- heptane.
To give you an example I have 2 1.8t (AEB, APU) in the aeb the factory injectors in the original file says that they are 168g/min of n-heptane and in the ECU it says that they are 267.7cc/min at 4 bars, 232cc/min at 3 bars. In the apu, in the original file it says 189.7g / min of n-heptane and in the control unit 298.5cc/min at 4 bars which is 259cc / min at 3 bars. Making rule of 3, the results come out different .. so I don't understand how to go from n-heptane to cc/min .. please a little help ... a big hug
« Last Edit: January 30, 2021, 06:13:14 AM by usuarionuevo » Logged
nyet
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« Reply #10 on: January 30, 2021, 12:41:29 PM »
I don't get what you are asking. To convert from g to cc you need density, and that's all.

What's the problem?
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ME7.1 tuning guide (READ FIRST)
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Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
nyet
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« Reply #11 on: January 30, 2021, 12:43:46 PM »
https://www.google.com/search?q=189+cc%2Fmin+*+684+kg%2Fm³+in+g%2Fmin
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ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
Tomas
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« Reply #12 on: January 30, 2021, 01:56:02 PM »
Ususarionuevo: Estás más perdido que un pulpo en un garaje Grin Grin Grin

KVB is the "Constant for fuel consumption display" (nothing to do with
Quote
"(KVB) which is the calculation to know how many cc/min are the grams of n- heptane."
)

You changed the formulas in the google spreadsheet I shared. I am attaching an Excel version

Quote
so I don't understand how to go from n-heptane to cc/min .. please a little help
The spreadsheet shows you how and Nye has also explained it.

Look around, you'll figure it out
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