NefMoto > Noob Zone > Noob Questions (Moderator: turboat) > FKKVS, KFKHFM importance
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Author Topic: FKKVS, KFKHFM importance  (Read 4009 times)
golfputtputt
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« on: January 02, 2018, 09:15:44 AM »
How influential to STFT’s are these maps to a return fuel system 1.8t? They seem to be populated with actual values instead of just 1’s.
I got my hands on the FKKVS table calculator, i just need to make it work.
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nyet
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« Reply #1 on: January 02, 2018, 02:18:25 PM »
FKKVS can be all ones. They are in all stock 2.7t files. All fine tuning is done in KFKHFM since it is assumed a return system is relatively linear, and the predominant fueling inaccuracies are from the MAF.

that said, there is more than one way to skin a cat. If you want to use FKKVS to fix up STFTs, there isn't anything inherently wrong with it.
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golfputtputt
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« Reply #2 on: January 02, 2018, 08:10:47 PM »
is it redundant to fix up both? Which one is primarily used is based on what? Results of trial and error essentially?
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nyet
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« Reply #3 on: January 02, 2018, 10:05:25 PM »
Quote from: golfputtputt on January 02, 2018, 08:10:47 PM
is it redundant to fix up both? Which one is primarily used is based on what? Results of trial and error essentially?

one is for MAF variance, other is for fueling variance. Both have the same effect, they are (basically) multiplicative. Please take a look at the FR
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golfputtputt
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« Reply #4 on: January 03, 2018, 06:51:54 AM »
Quote from: nyet on January 02, 2018, 10:05:25 PM
one is for MAF variance, other is for fueling variance. Both have the same effect, they are (basically) multiplicative. Please take a look at the FR

Thanks, yea i did but didn’t understand it. That document is dense and i have a lot of trouble understanding it 90% of the time.
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nyet
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« Reply #5 on: January 03, 2018, 01:09:56 PM »
The difference:

If you fix up MAF problems in FKKVS, or fueling problems in KFKHFM, your load/maf readings will be inaccurate, even if your fueling ends up correct.
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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 ex
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