IFR table
#1
IFR table
Table B4001 (Injector Flow Rate) in EFILive. I have the multec II 44lb injectors in my truck. They are maxing out at 107% right now so I was looking for any way to get a little fuel back in the mean time till i get some 60's. Anyhow, I am pulling my AFR back to 12.05 and looking into adjusting the FPR a little when i decided to look into some of my injector tables. I noticed table B4001 was set to 40.8 all the way down the coulmn. Shouldn't that be 44.0 all the way down or is there some correction factor I dont know about?
#3
Originally Posted by RedHardSupra
log fuel pressure, calculate IFR based on the various fuel pressures you get at different MANVAC values.
Thanks
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http://www.forum.efilive.com/showthread.php?t=3661 is the logging part
this is my new spreadsheet to deal with the data gathered:
http://redhardsupra.blogspot.com/200...gged-fuel.html
this is my new spreadsheet to deal with the data gathered:
http://redhardsupra.blogspot.com/200...gged-fuel.html
#6
Cool stuff RHS, i may have to set that up so i can log FP with EFILive, very cool. However, lol...in the meantime, what is the general concensus on that B4001 table? I know I can tweak it once I have logged the data, but just for starters what should those columns be populated with? Should they inducate the full p/hr ability of the injector which would be 44.0, or should they be slightly lower like mine is now at 40.8?
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i dont know diddly squat about trucks, but from what i understand they run 58psi fuel pressure and have a return fuel system with a fpr that keeps injector flow constant no matter what pressure we have in manifold, right?
with these assumptions, your IFR table should be filled with 4.97g/sec for the whole range of MANVAC. (that'd the default unit in EFILive) (Static flow @ 43.82lb/hr @ 58PSI / 400KPa or 4.97 g/s or 460cc/min).
but i just noticed that you have FPR and boost involved, so this gets much more complicated. I just figured out a lot of stuff how to deal with it, but it's still in testing phases. are you using EFILive's COS and 2bar MAP or just hacking on IFR/MAF/PE?
with these assumptions, your IFR table should be filled with 4.97g/sec for the whole range of MANVAC. (that'd the default unit in EFILive) (Static flow @ 43.82lb/hr @ 58PSI / 400KPa or 4.97 g/s or 460cc/min).
but i just noticed that you have FPR and boost involved, so this gets much more complicated. I just figured out a lot of stuff how to deal with it, but it's still in testing phases. are you using EFILive's COS and 2bar MAP or just hacking on IFR/MAF/PE?
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#8
Originally Posted by RedHardSupra
i dont know diddly squat about trucks, but from what i understand they run 58psi fuel pressure and have a return fuel system with a fpr that keeps injector flow constant no matter what pressure we have in manifold, right?
with these assumptions, your IFR table should be filled with 4.97g/sec for the whole range of MANVAC. (that'd the default unit in EFILive) (Static flow @ 43.82lb/hr @ 58PSI / 400KPa or 4.97 g/s or 460cc/min).
but i just noticed that you have FPR and boost involved, so this gets much more complicated. I just figured out a lot of stuff how to deal with it, but it's still in testing phases. are you using EFILive's COS and 2bar MAP or just hacking on IFR/MAF/PE?
with these assumptions, your IFR table should be filled with 4.97g/sec for the whole range of MANVAC. (that'd the default unit in EFILive) (Static flow @ 43.82lb/hr @ 58PSI / 400KPa or 4.97 g/s or 460cc/min).
but i just noticed that you have FPR and boost involved, so this gets much more complicated. I just figured out a lot of stuff how to deal with it, but it's still in testing phases. are you using EFILive's COS and 2bar MAP or just hacking on IFR/MAF/PE?
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Most of the trucks Ive seen fluctuate from 55psi at idle and part throttle to 58-60 at WOT. The thing about the IFR table is that it will never be perfect there are other factors that can influence what the actual injector flow rate like voltage fluctuations etc..
But, the good news is that any discrepancies can be made up by the VE table and/or maf so I set the IFR according to the max injector rating (60psi) and then go about tuning the rest any slack is taken up in the other air tables.
Thats my take on it.
But, the good news is that any discrepancies can be made up by the VE table and/or maf so I set the IFR according to the max injector rating (60psi) and then go about tuning the rest any slack is taken up in the other air tables.
Thats my take on it.