850cc flow test @3bar = 1040cc
03-03-13, 01:44 PM
#1
850cc flow test @3bar = 1040cc
i sent out my stock 850cc injectors out for cleaning and flow test...
i requested flow test @ 43.5psi / 3bar as my aeromotive FPR base pressure is 43.5 psi so i wanted to see the flow rate at exactly that pressure
@ that pressure injectors came back 1040cc
now in past i sent out couple of different sets of 850cc injectors out for cleaning and they use to come back as 850cc but i noticed they where tested under 3bar don’t recall exact number 2.?bar
my car always run rich at idle with 850cc don’t matter what i did...- just wondering if a set my base fuel pressure to high...should i tune new set as 1040cc @3bar
i requested flow test @ 43.5psi / 3bar as my aeromotive FPR base pressure is 43.5 psi so i wanted to see the flow rate at exactly that pressure
@ that pressure injectors came back 1040cc
now in past i sent out couple of different sets of 850cc injectors out for cleaning and they use to come back as 850cc but i noticed they where tested under 3bar don’t recall exact number 2.?bar
my car always run rich at idle with 850cc don’t matter what i did...- just wondering if a set my base fuel pressure to high...should i tune new set as 1040cc @3bar
03-03-13, 04:30 PM
#2
If the injectors were tested under 3 bars, which is what manufacturer recommended. Base fuel pressure should be 35-38 without vacuum which equates to 2.694 bars. 38psi/14.1.
So I believe you've had your base pressure set at 3bars (42.3psi) then you'll have a "rich" mixture because of the extra fuel being dumped into the engine.
-AzEKnightz
So I believe you've had your base pressure set at 3bars (42.3psi) then you'll have a "rich" mixture because of the extra fuel being dumped into the engine.
-AzEKnightz
03-03-13, 05:38 PM
#3
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If the injectors were tested under 3 bars, which is what manufacturer recommended. Base fuel pressure should be 35-38 without vacuum which equates to 2.694 bars. 38psi/14.1.
So I believe you've had your base pressure set at 3bars (42.3psi) then you'll have a "rich" mixture because of the extra fuel being dumped into the engine.
-AzEKnightz
So I believe you've had your base pressure set at 3bars (42.3psi) then you'll have a "rich" mixture because of the extra fuel being dumped into the engine.
-AzEKnightz
before I had 850 primaries with the OEM fpr... but now I've put in a adjustable fpr, and a buddy of mine said put the base pressure to 3 bar... but still running the map from before... so turning down the base press to 2,7 (running car and the vaccum not hooked up to the fpr), i should have a better idle?
03-03-13, 06:46 PM
#4
This can expalin why my car runs rich to
before I had 850 primaries with the OEM fpr... but now I've put in a adjustable fpr, and a buddy of mine said put the base pressure to 3 bar... but still running the map from before... so turning down the base press to 2,7 (running car and the vaccum not hooked up to the fpr), i should have a better idle?
before I had 850 primaries with the OEM fpr... but now I've put in a adjustable fpr, and a buddy of mine said put the base pressure to 3 bar... but still running the map from before... so turning down the base press to 2,7 (running car and the vaccum not hooked up to the fpr), i should have a better idle?
-AzEKnightz
03-03-13, 07:40 PM
#5
This can expalin why my car runs rich to
before I had 850 primaries with the OEM fpr... but now I've put in a adjustable fpr, and a buddy of mine said put the base pressure to 3 bar... but still running the map from before... so turning down the base press to 2,7 (running car and the vaccum not hooked up to the fpr), i should have a better idle?
before I had 850 primaries with the OEM fpr... but now I've put in a adjustable fpr, and a buddy of mine said put the base pressure to 3 bar... but still running the map from before... so turning down the base press to 2,7 (running car and the vaccum not hooked up to the fpr), i should have a better idle?
frp 1:1 for every 1psi of boost your fuel pressure goes up by same amount to compensate
03-03-13, 07:56 PM
#6
ok that explains it...i did not test stock fuel pressure...so i whet by 3bar as i read somewhere here on forum must have been for Bosch or some other top feed injector...as there flow rates are usually at 3 or 4bar...
so did any one tune this @3bar as 1040cc
so did any one tune this @3bar as 1040cc
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