IFR is really low in HPT ?
11-06-2010, 10:39 AM
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IFR is really low in HPT ? Hey guys,
I am new to HP Tuners and have just been learning and trying to get to know everything for the last week or so.
I've noticed that my IFR vs. KPA table is tuned to 11.69 through all cells. I thought that this was the table that was used to imput the lb/hr of the injectors.
My car has been tuned by a very reputible FI tuner, so Im not "worried", Im just hunting for an explination and a search brought up nothing for me.
The injectors I am using are the Siemens Deka 80lb @ 43.5psi, so roughly 93lb at 58psi. However, I run a 1:1 boost referenced fuel system.
Anyway, Im just looking for an explination as to why the Flow Rate vs. KPA is so low as opposed to the actual IFR.
I am new to HP Tuners and have just been learning and trying to get to know everything for the last week or so.
I've noticed that my IFR vs. KPA table is tuned to 11.69 through all cells. I thought that this was the table that was used to imput the lb/hr of the injectors.
My car has been tuned by a very reputible FI tuner, so Im not "worried", Im just hunting for an explination and a search brought up nothing for me.
The injectors I am using are the Siemens Deka 80lb @ 43.5psi, so roughly 93lb at 58psi. However, I run a 1:1 boost referenced fuel system.
Anyway, Im just looking for an explination as to why the Flow Rate vs. KPA is so low as opposed to the actual IFR.
11-06-2010, 11:21 AM
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A flat-line IFR table would be appropriate for a manifold-
referenced fuel pressure regulator setup. However if that
is lb/hr it's crazy low; would have to look at what is sane
for g/sec units. You might go pull down that injector
spreadsheet and check the math, some people still try
to fix AFR scaling by hoaxing the injector table, and if
you were past 512 g/sec airflow there might be no other
choice on a stock PCM but to lie about both air and fuel.
80# injectors might mean you're about there.
referenced fuel pressure regulator setup. However if that
is lb/hr it's crazy low; would have to look at what is sane
for g/sec units. You might go pull down that injector
spreadsheet and check the math, some people still try
to fix AFR scaling by hoaxing the injector table, and if
you were past 512 g/sec airflow there might be no other
choice on a stock PCM but to lie about both air and fuel.
80# injectors might mean you're about there.
11-06-2010, 11:32 AM
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A flat-line IFR table would be appropriate for a manifold-
referenced fuel pressure regulator setup. However if that
is lb/hr it's crazy low; would have to look at what is sane
for g/sec units. You might go pull down that injector
spreadsheet and check the math, some people still try
to fix AFR scaling by hoaxing the injector table, and if
you were past 512 g/sec airflow there might be no other
choice on a stock PCM but to lie about both air and fuel.
80# injectors might mean you're about there.
referenced fuel pressure regulator setup. However if that
is lb/hr it's crazy low; would have to look at what is sane
for g/sec units. You might go pull down that injector
spreadsheet and check the math, some people still try
to fix AFR scaling by hoaxing the injector table, and if
you were past 512 g/sec airflow there might be no other
choice on a stock PCM but to lie about both air and fuel.
80# injectors might mean you're about there.
