rickymix
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« on: May 28, 2016, 09:37:53 AM »
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Hi everybody,
I have a problem with my krkte (stock -.> 010301)
after doing the calcul I must have 0.7435 ... but it is much too poor and boost comes later than with the stocks injectors
it starts very well,
idling unstable
I also changed the TVUB (as from 11.96V)
could someone help me please?
thank you in advance
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nyet
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« Reply #1 on: May 28, 2016, 10:30:40 AM »
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stock -.> 010301)
after doing the calcul I must have 0.7435
Your new injectors are 72.1774584992 times larger than stock? Those are awful big injectors. |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease 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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armageddon
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« Reply #2 on: May 28, 2016, 11:11:40 AM »
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(old cc/new cc) x old KRKTE should be a good starting point
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rickymix
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« Reply #3 on: May 28, 2016, 11:13:10 AM »
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Your new injectors are 72.1774584992 times larger than stock? Those are awful big injectors.
Sorry, 0.07435 |
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rickymix
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« Reply #4 on: May 28, 2016, 11:13:57 AM »
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(old cc/new cc) x old KRKTE should be a good starting point
old :317cc new : 440cc |
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rickymix
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« Reply #5 on: May 28, 2016, 11:16:08 AM »
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(old cc/new cc) x old KRKTE should be a good starting point
sorry, stock krkte 0.10301 |
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rickymix
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« Reply #6 on: May 28, 2016, 12:11:43 PM »
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i see an other method for calculating :
KRKTE * FLOW = CHEATNUMBER
0,10301 * 317cc = 32,65417
CHEATNUMBER / new FLOW = new KRKTE
32,65417 / 4400cc = 0,07421
i need just tune this?
others tuners tune just FKKVS/FRLFSDP
and a friend tune FKKVS/FRLFSDP and krkte
but a see on forum, until 630cc i just need to tune KRKTE and TVUB
right?
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nyet
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« Reply #7 on: May 28, 2016, 01:50:26 PM »
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Your new injectors are 72.1774584992 times larger than stock? Those are awful big injectors.
Sorry, i had this backwards. KRKTE is inversely proportional to injector size. |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease 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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rickymix
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« Reply #8 on: May 28, 2016, 04:37:15 PM »
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Sorry, i had this backwards.
KRKTE is inversely proportional to injector size.
thanks so? for tvub I multiplied by 1.15 the map(5x1) I need to understand why it does not work fine... can u help me? |
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nyet
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« Reply #9 on: May 28, 2016, 06:15:40 PM »
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for tvub I multiplied by 1.15 the map(5x1)
Every injector has a completely different latency characterization. In theory, for a given injector, you can scale tvub by fuel pressure, but that scaling is also injector dependent. Scaling it by 1.15 makes zero sense in your case. |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease 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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rickymix
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« Reply #10 on: May 28, 2016, 11:57:30 PM »
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Every injector has a completely different latency characterization.
In theory, for a given injector, you can scale tvub by fuel pressure, but that scaling is also injector dependent.
Scaling it by 1.15 makes zero sense in your case.
what do u mean? |
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nyet
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« Reply #11 on: May 29, 2016, 12:15:02 AM »
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I'll rephrase; scaling TVUB according to flow rate is plain incorrect in every way.
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease 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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rickymix
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« Reply #12 on: May 29, 2016, 12:52:12 AM »
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I'll rephrase; scaling TVUB according to flow rate is plain incorrect in every way.
that you advise me then? |
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rickymix
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« Reply #13 on: May 29, 2016, 02:09:25 AM »
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I'll rephrase; scaling TVUB according to flow rate is plain incorrect in every way.
what is the formula to calculate the TVUB? |
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littco
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« Reply #14 on: May 29, 2016, 02:36:25 AM »
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what is the formula to calculate the TVUB?
There is no formula! You need to get the battery voltage settings for the injectors from the manufacture of the injectors, most can be found on line just search. As for the Krkte, just pick a value which you think it close the actual, probably based on the formula stated below and then do some logging, if the ecu is adding fuel then increase the krkte and if its taking fuel off then decrease it.... until the fuel trims are as close to 0 as you can be bothered. you have a 25% +/- to work with. |
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