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TTQS
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« Reply #15 on: August 25, 2011, 01:35:07 AM »
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Excellent discussion clearing up a few myths. Thanks for some great challenges guys.
Doug
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NOTORIOUS VR
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« Reply #16 on: August 25, 2011, 05:24:56 AM »
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OH MY GOD.
It's all good!  In either case remember to update your M-box XDF posted on here (I'm sure you already have). Great, so I'm glad that's solved... I was really scratching my head on that one for a while lol |
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judeisnotobscure
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« Reply #17 on: August 25, 2011, 04:59:36 PM »
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yeah, no worries. fixed my definition thanks.
I love this forum.
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I have a b5 s4
but i just want to dance.
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nyet
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« Reply #18 on: August 25, 2011, 09:44:35 PM »
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Snow Trooper
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« Reply #19 on: August 27, 2011, 11:17:10 AM »
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so have we decided what the true stock injector flow rate is?
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cartoons?
6A 61 72 65 64 40 76 6C 6D 73 70 65 63
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NOTORIOUS VR
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« Reply #20 on: August 28, 2011, 10:14:28 AM »
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so have we decided what the true stock injector flow rate is?
349cc @ 4 BAR seems to be correct or at least very close... but you cannot be certain working backwards from the bin. |
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Snow Trooper
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« Reply #21 on: August 29, 2011, 09:12:24 AM »
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I think they might be 319cc as if you do the math that meshes with the stock krkte value. 349cc = .09337
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cartoons?
6A 61 72 65 64 40 76 6C 6D 73 70 65 63
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TTQS
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« Reply #22 on: September 07, 2011, 02:38:22 AM »
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I got 320 cc/min from KRKTE of 0.09778 and the funktionsrahmen expression so I thought I'd have a look at ELSAwin to get the actual figure but all I could find was a wide range of 270 to 330 cc/min. This is also a PITA because the test medium is gasoline from the fuel tank. So we would then have to correct this figure by the ratio of the density of n-heptane (0.6795 g/cc) to the gasoline in use. However, If we just use the 'petrol factor' of 1.05 in the funktionsrahmen which would result from a gasoline density of 0.7135 g/cc, (although I understand premium is nearer 0.75) this would give a Qstat range of 283.5 to 346.5 cc/min (n-heptane).
Not as helpful a conclusion as I had hoped :-(
Doug
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« Last Edit: September 12, 2011, 02:58:30 AM by TTQS »
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ABCD
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« Reply #23 on: July 18, 2012, 07:38:57 PM »
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I got 320 cc/min from KRKTE of 0.09778 and the funktionsrahmen expression so I thought I'd have a look at ELSAwin to get the actual figure but all I could find was a wide range of 270 to 330 cc/min. This is also a PITA because the test medium is gasoline from the fuel tank. So we would then have to correct this figure by the ratio of the density of n-heptane (0.6795 g/cc) to the gasoline in use. However, If we just use the 'petrol factor' of 1.05 in the funktionsrahmen which would result from a gasoline density of 0.7135 g/cc, (although I understand premium is nearer 0.75) this would give a Qstat range of 283.5 to 346.5 cc/min (n-heptane).
Not as helpful a conclusion as I had hoped :-(
Doug
So, that means across the globe we get fuel of varying density etc...so the calculations will vary a bit ...? |
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nyet
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« Reply #24 on: July 18, 2012, 08:31:18 PM »
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I've given up trying to find the right theoretical value for krkte and just tune it empirically
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RaraK
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« Reply #25 on: July 20, 2012, 05:35:13 PM »
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I've given up trying to find the right theoretical value for krkte and just tune it empirically
there you go. I gave up on a "formula" a LOOONG time ago. just never has worked for me.  I just do percent change, and then fine tune from there. Usually its within 6-7% on the 4 sets of injectors i had calibrated. Good enough starting point realistically. |
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dantt
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« Reply #26 on: September 26, 2013, 02:48:11 AM »
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hello guys,
I need your help.
I have a tt 225 with map and air filter
I would like to add a fuel pressure regulator from 3 bar (standard) to 4bar
I have not understand if I need to change only KRKTE or I need to change FRLFSDP too
thanks
Daniele
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« Last Edit: September 26, 2013, 02:49:48 AM by dantt »
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catbed
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« Reply #27 on: September 26, 2013, 04:01:08 AM »
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hello guys,
I need your help.
I have a tt 225 with map and air filter
I would like to add a fuel pressure regulator from 3 bar (standard) to 4bar
I have not understand if I need to change only KRKTE or I need to change FRLFSDP too
thanks
Daniele
KRKTE is what you need to change. |
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dantt
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« Reply #28 on: September 26, 2013, 07:18:13 AM »
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KRKTE is what you need to change.
thanks for your support ithink that 386cc @3bar whit new fuel pressur regolator @ 4bar became 445cc, isn't it? whit this calculator http://nefariousmotorsports.com/forum/index.php?;topic=4021.0 ( i' have tested it! it works fine whit oem value ) my new value is KRKTE = 0,073223304 do you think i need to modify KVB for fuel consumption ? thanks !!!! |
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catbed
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« Reply #29 on: September 26, 2013, 10:53:19 AM »
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thanks for your support ithink that 386cc @3bar whit new fuel pressur regolator @ 4bar became 445cc, isn't it? whit this calculator http://nefariousmotorsports.com/forum/index.php?;topic=4021.0 ( i' have tested it! it works fine whit oem value ) my new value is KRKTE = 0,073223304 do you think i need to modify KVB for fuel consumption ? thanks !!!! Yes, if you want dashboard display to be somewhat accurate. Multiply KVB by %change in KRKTE. |
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