injector flow rate vs kpa
01-23-2013, 11:42 AM
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injector flow rate vs kpa What is the correct way to scale injectors using hp tuners. Im running 80 lb injectors with a magnafuel boost reference FPR and put 80 across the flow rate vs kpa table, Is this correct?
01-23-2013, 03:26 PM
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that sounds correct.
what is your BASE fuel pressure with the FPR removed set at? reason I ask is if the injector is rated 80# @ 43.5psi; and your BASE fuel pressure at your FPR with the manifold reference removed is 58psi; your IFR is incorrect.
BASE FPR pressure w/ NO manifold hookup = xx psi
Injector 80# rated fuel psi xxx psi
if both are equal, then yes, 80# is what you put across the IFR table.
if one is 58psi and one is 43.5psi; then you will multiply 80# by 1.1547 and put that number in the IFR table across the entire table.
*square root of 58/43.5 = 1.1547; flow difference from 43.5psi to 58psi.
Another note is if you are running 18psi BOOST, then you will want to check your fuel pumps maximum pressure; as most are rated up to 70psi I think. So you will want to scale back your FPR pressure and scale your IFR accordingly...all depends on boost you are running and your fuel pump max psi.
what is your BASE fuel pressure with the FPR removed set at? reason I ask is if the injector is rated 80# @ 43.5psi; and your BASE fuel pressure at your FPR with the manifold reference removed is 58psi; your IFR is incorrect.
BASE FPR pressure w/ NO manifold hookup = xx psi
Injector 80# rated fuel psi xxx psi
if both are equal, then yes, 80# is what you put across the IFR table.
if one is 58psi and one is 43.5psi; then you will multiply 80# by 1.1547 and put that number in the IFR table across the entire table.
*square root of 58/43.5 = 1.1547; flow difference from 43.5psi to 58psi.
Another note is if you are running 18psi BOOST, then you will want to check your fuel pumps maximum pressure; as most are rated up to 70psi I think. So you will want to scale back your FPR pressure and scale your IFR accordingly...all depends on boost you are running and your fuel pump max psi.
01-24-2013, 02:53 AM
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that sounds correct.
what is your BASE fuel pressure with the FPR removed set at? reason I ask is if the injector is rated 80# @ 43.5psi; and your BASE fuel pressure at your FPR with the manifold reference removed is 58psi; your IFR is incorrect.
BASE FPR pressure w/ NO manifold hookup = xx psi
Injector 80# rated fuel psi xxx psi
if both are equal, then yes, 80# is what you put across the IFR table.
if one is 58psi and one is 43.5psi; then you will multiply 80# by 1.1547 and put that number in the IFR table across the entire table.
*square root of 58/43.5 = 1.1547; flow difference from 43.5psi to 58psi.
Another note is if you are running 18psi BOOST, then you will want to check your fuel pumps maximum pressure; as most are rated up to 70psi I think. So you will want to scale back your FPR pressure and scale your IFR accordingly...all depends on boost you are running and your fuel pump max psi.
what is your BASE fuel pressure with the FPR removed set at? reason I ask is if the injector is rated 80# @ 43.5psi; and your BASE fuel pressure at your FPR with the manifold reference removed is 58psi; your IFR is incorrect.
BASE FPR pressure w/ NO manifold hookup = xx psi
Injector 80# rated fuel psi xxx psi
if both are equal, then yes, 80# is what you put across the IFR table.
if one is 58psi and one is 43.5psi; then you will multiply 80# by 1.1547 and put that number in the IFR table across the entire table.
*square root of 58/43.5 = 1.1547; flow difference from 43.5psi to 58psi.
Another note is if you are running 18psi BOOST, then you will want to check your fuel pumps maximum pressure; as most are rated up to 70psi I think. So you will want to scale back your FPR pressure and scale your IFR accordingly...all depends on boost you are running and your fuel pump max psi.
Is there a benefit to using one of the injector flow rate calculators and scaling the IFR or is this just for a fixed fuel pressure?
