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Author Topic: setting 0280158117 for e85 1.8t  (Read 3611 times)
JeanAwt
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« on: October 23, 2022, 10:49:36 AM »

stock engine awt frp 4bar
original injector 0280156065
KRKTE=0.10478
KVB=298.59375

I want to put
0280158117
with 340l/h pump for e85

are there other maps to adjust?

but I find different calculation krkte

0280158117 makes 588cc for 4bar
Displacement of a cylinder
0.45dm3
KRKTE pump fuel = 0.056225766
 
KRKTE ethanol = 0.083867961

it's no good?
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TeknoFi
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« Reply #1 on: October 23, 2022, 11:15:48 AM »

are there other maps to adjust?

TVUB
TEMIN(/VA)
Final fine-adjustment: FKKVS
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JeanAwt
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« Reply #2 on: October 23, 2022, 11:25:47 AM »

thanks TeknoFi
but I'm not all the maps Undecided
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JeanAwt
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« Reply #3 on: October 23, 2022, 11:39:21 AM »

with krkte calculator:

         
Air density (0  C and 1013hPa)                 -->            1   g/dmˆ3   
Displacement of a cylinder                        -->            0.44525   dmˆ3   
Valve constant with n-Heptane               -->            376.2   g/min   
Valve correction for petrol/n-Heptane -->            1.05      
Air/fuel ratio for Lambda = 1.0                 -->            14.7      
Adaptation of units                                       -->            0.00001667   min/ms   
                  
Injectors flow rate =      550   cc/min         


      KRKTE pump fuel =      0.05947596      

Ethanol content                       -->            85   %   
                  
Stoich value on Ethanol       -->            9.855      

      KRKTE ethanol =      0.08871604

      
I know it won't be perfect because I'm a reprog noob
I can adjust with unisetting  Roll Eyes Huh
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JeanAwt
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« Reply #4 on: October 31, 2022, 08:55:51 AM »

hello
 KVB is cc/min? I want to put 0280158117 is 630cc with 4bar? and how to calculate TVUB please. for a noob Huh
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TeknoFi
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« Reply #5 on: October 31, 2022, 11:48:50 AM »

hello
 KVB is cc/min?


yes

Quote
how to calculate TVUB please. for a noob Huh

injector datasheet or use forum search http://nefariousmotorsports.com/forum/index.php?topic=1523.0



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JeanAwt
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« Reply #6 on: October 31, 2022, 01:19:32 PM »

thank TeknoFi,

complicate for a noob Sad Huh
on the site I found:
0280158117
58psi/4bar
8v 3.2
10v 1.61
12v 1.155
14v 0.75
16v 0.540
question from noob do i have to modify TVUB? it's my daily to go to work every day. i just want him to swallow e85 and a little more boost Grin
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TeknoFi
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« Reply #7 on: October 31, 2022, 01:53:13 PM »

question from noob do i have to modify TVUB? it's my daily to go to work every day. i just want him to swallow e85 and a little more boost Grin

It's highly recommended to put TVUB values according to the injectors. It is the dead time / opening lag. Operating pressure also affects it a bit, but not as much as krkte.

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JeanAwt
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« Reply #8 on: November 01, 2022, 02:59:04 AM »

thank you, can someone check my calculations? i took an average of 75% ethanol.in france
In summer (early May to late September): between 75% and 85% In winter (mid-November to mid-March): between 65% and 75%
I have the maps
KVB
FKKVS
TVUB
KRKTE
KFLF

KRKTE Calculator                  

Air density (0  C and 1013hPa)                 -->            1   g/dmˆ3   
Displacement of a cylinder                        -->            0.44525   dmˆ3   
Valve constant with n-Heptane               -->            430.92   g/min   
Valve correction for petrol/n-Heptane -->            1.05      
Air/fuel ratio for Lambda = 1.0                 -->            14.7      
Adaptation of units                                       -->            0.00001667   min/ms   
                  
Injectors flow rate =      630   cc/min         


      KRKTE pump fuel =      0.05192345      

Ethanol content                       -->            75   %   
                  
Stoich value on Ethanol       -->            10.425      

      KRKTE ethanol =      0.0732158

TVUB
8v 3.2
10v 1.61
12v 1.155
14v 0.75
16v 0.540
I can try "my" calculation? or it's bad? I understand the basics setting but calcul it's complicated for my little industrial mechanic head Undecided Grin

sorry for my anarchic noob posts


      
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TeknoFi
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« Reply #9 on: November 01, 2022, 09:56:14 AM »

Injectors flow rate =      630   cc/min         


      KRKTE pump fuel =      0.05192345      
      KRKTE ethanol =      0.0732158

I can try "my" calculation? or it's bad? I understand the basics setting but calcul it's complicated for my little industrial mechanic head Undecided Grin
   

Seems reasonable. I would say do a test driving with those but keep eye on fuel trims. Then correct long fuel trim deviations in percentage to krkte.
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JeanAwt
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« Reply #10 on: November 01, 2022, 10:20:56 AM »

thanks again TeknoFi Grin

 yes do a driving test and look trims. I know my calculations are not very good but I think the best is setting log setting log....and big gas

I still have a lot to learn and a lot of maps to find

sorry for my english/french+google translate Lips sealed Roll Eyes
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JeanAwt
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« Reply #11 on: November 04, 2022, 11:02:59 AM »

and TVUB is good to try? original for 0280156065 is
1.88
1.09
0.69
0.44
0.27
i can try for 0280158117
TVUB
8v 3.2
10v 1.61
12v 1.155
14v 0.75
16v 0.540
?
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Andy.G
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« Reply #12 on: November 17, 2022, 12:36:42 AM »

Air/fuel ratio for Lambda = 1.0                 -->            14.7

A question. The stoichiometric value of e85 is 9,76 and gas is 14,7.

Should you not change to 9,76 since you run on e85? Or am I missing something?

KRKTE changes quite drastically when changing this value.
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_nameless
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« Reply #13 on: November 17, 2022, 12:40:23 AM »

lambda is lambda. your conversion factor is afr gauge calibrated to gasoline. Target lambda will not change, just the injection quantity will need to be increased to get to lambda of 1. Hint: calculate krkte for pump gas then add 40% to that value and you will have a ballpark krkte for e85.   
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JeanAwt
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« Reply #14 on: November 17, 2022, 11:39:28 AM »

yes Andy the value of the primary fuel will have to change a lot in E85 with original injectors but I go almost from 300cc to +600cc 0.07 is only a basic value that I found with the krkte calculator and I I put an average value of 75% E85. And yes the goal is lambda 1.
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