IFR's for mototron 60# injectors??
10-20-2005, 06:06 PM
#6
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so all you changed was the injector size? i didnt know if i needed to change any of the other values is all. thanks!
RedHotSupra is gonna be pissed at me
He personally emailed it to me 
RedHotSupra is gonna be pissed at me
He personally emailed it to me Trending Topics
10-20-2005, 07:03 PM
#9
i'm not pissed, just disappointed, on these sort of questions i always argue with myself if i tell people do learn to do it proper themselves, or do i just post the answer because then you populate forums with answers, not flamewars. now that you saw the answer, go use the spreadsheet, n00b! 
10-20-2005, 07:04 PM
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i will!! 
id of done it myself but like i said in the other post..i couldnt get you on aim 
i wasnt going to ask for the answer i was going to ask for direction. I want to learn, not be told. I was curious what the FP would be, then i could've figured it out.
Nino
id of done it myself but like i said in the other post..i couldnt get you on aim i wasnt going to ask for the answer i was going to ask for direction. I want to learn, not be told. I was curious what the FP would be, then i could've figured it out.Nino
10-20-2005, 07:07 PM
#11
that's also been posted. multiple times. by me. see, this is what i mean by 'populate with data, don't pollute with flaming'--if the RIGHT information was more popular than flamethreads, there was more more of a hit-to-miss ratio on the search button. damn kids, polluting the search pool...
10-20-2005, 07:13 PM
#12
Originally Posted by ninobrn99
i will!! id of done it myself but like i said in the other post..i couldnt get you on aim i wasnt going to ask for the answer i was going to ask for direction. I want to learn, not be told. I was curious what the FP would be, then i could've figured it out.
Nino
id of done it myself but like i said in the other post..i couldnt get you on aim i wasnt going to ask for the answer i was going to ask for direction. I want to learn, not be told. I was curious what the FP would be, then i could've figured it out.Nino
Ill try not to let it happen again!! PROMISE!
10-20-2005, 08:03 PM
#14
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Originally Posted by ninobrn99
58 psi is the FP at WOT correct?
10-22-2005, 01:32 PM
#16
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Originally Posted by ninobrn99
i thought it was...
at WOT the FP is 58 + MAP (in psi),
and at WOT the MAP value is almost BARO.
With a MAP referenced pressure regulator,
the IFR table would be flat (not sloped),
and that doesn't seem to be what you have.
The standard (unreferenced) regulator just keeps
the FP constant at 58 psi regardless of MAP or WOT,
and the PCM uses the sloped IFR table to control flow.
Last edited by joecar; 10-22-2005 at 01:42 PM.
10-22-2005, 03:18 PM
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Originally Posted by 2xLS1
69.28325412 69.71504837 70.14418464 70.5707114 70.99467569 71.41612314 71.83509806 72.25164345 72.6658011 73.07761161 73.48711443 73.89434793 74.29934942 74.70215521 75.10280062 75.50132005 75.89774699
Code:
0kPA 5kPA 10kPA 15kPA 20kPA 25kPA 30kPA 35kPA 40kPA 45kPA 50kPA 54kPA 60kPA 65kPA 70kPA 75kPA 80kPA 69.28325412 69.71504837 70.14418464 70.5707114 70.99467569 71.41612314 71.83509806 72.25164345 72.6658011 73.07761161 73.48711443 73.89434793 74.29934942 74.70215521 75.10280062 75.50132005 75.89774699
just to clarify
the bigger the number going this way -> mean the injector is going to flow more fuel?
Last edited by MECHAM; 10-22-2005 at 03:24 PM.
10-23-2005, 06:17 AM
#18
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Code:
0kPA 5kPA ... 75kPA 80kPA 69.28325412 69.71504837 ... 75.50132005 75.89774699
the bigger the number going this way -> mean the injector is going to flow more fuel?
The kPa scale is BARO - MAP a.k.a. VAC (in kPa); WOT is on the LEFT (VAC = 0 kPa).
The flow rate of an injector is proportional to the pressure difference across the injector;
on one side is fuel absolute pressure (FAP), on other side is manifold absolute pressure (MAP);
FAP is: fuel rail gauge pressure (which is relative to BARO) plus BARO (to make it absolute).
Pressure difference across injector = FAP - MAP = FP + BARO - MAP (all units in kPa).
So, for example, say BARO is 100kPa (for easy numbers), and that at idle MAP is 33kPa;
AT WOT, MAP is 100kPa, so press. diff. is (FAP - 100).
At idle, MAP is 33kPa, so press. diff. is (FAP - 33).
You can see that (FAP - 100) is less than (FAP - 33).
so, IFR is less at WOT (FAP - 100) than at idle (FAP - 33).
i.e. vacuum (at idle) assists the injector flow rate, BARO (at WOT) impedes it.
This is why the IFR table slopes up to the right
(tells PCM what the injector can do as VAC varies).
LOL... we just had our dinner and it's after 4am, I better get some sleep.... zzzz
Last edited by joecar; 10-23-2005 at 06:23 AM.
