fuel injectors affect gas mileage?

[c a m a r o]

how much do bigger injectors affect gas mileage? does an fmu solve the problem with getting better gas mileage AND having the power on tap when you open the throttle up? i know more fuel = more horsepower, but im talking about cruising speeds here.

[98Camaro3.8]

More fuel != more horsepower. Upgrading injectors on a mostly stock engine will not give you any more horsepower. If you don't have a real need for new injectors, don't waste your money.

[phoenix64]

I'm averaging 16.6 mpg with my 42.5 lb injectors. :(
But I can't keep my foot out of it either.

[AllTheGoodNamesAreGone]

did you do any tuning whe nyou put those injectors in??

those things have more then 2-times the flow rate of our stock injectors..

[phoenix64]

I just doubled the flowrate vs KPA values in the fuel control portion of the HPtuners program. It runs really well, doesn't smoke or anything, but I think it is a little rich.

BTW HPtuners rules.

[Turbo V6 Camaro]

Originally posted by phoenix64:
I just doubled the flowrate vs KPA values in the fuel control portion of the HPtuners program. It runs really well, doesn't smoke or anything, but I think it is a little rich.

BTW HPtuners rules.

47.5 lb/hr - 22lb hour stock = 25.5. 47.5/25.5 = 1.8627 is wath you should miutiply you table buy

[AllTheGoodNamesAreGone]

Originally posted by viper04af:
</font><blockquote>quote:</font><hr />Originally posted by phoenix64:
I just doubled the flowrate vs KPA values in the fuel control portion of the HPtuners program. It runs really well, doesn't smoke or anything, but I think it is a little rich.

BTW HPtuners rules.

47.5 lb/hr - 22lb hour stock = 25.5. 47.5/25.5 = 1.8627 is wath you should miutiply you table buy </font>[/QUOTE]hrmm.. neat forumula where did you come by that one?? book?? web link??

[Turbo V6 Camaro]

Originally posted by AllTheGoodNamesAreGone:
</font><blockquote>quote:</font><hr />Originally posted by viper04af:
</font><blockquote>quote:</font><hr />Originally posted by phoenix64:
I just doubled the flowrate vs KPA values in the fuel control portion of the HPtuners program. It runs really well, doesn't smoke or anything, but I think it is a little rich.

BTW HPtuners rules.

47.5 lb/hr - 22lb hour stock = 25.5. 47.5/25.5 = 1.8627 is wath you should miutiply you table buy </font>[/QUOTE]hrmm.. neat forumula where did you come by that one?? book?? web link?? </font>[/QUOTE]MSD web page under fuel managment area i just found it few days ago. let me see if i can find it again

[njp98]

Viper is correct in that formula. I had better results in saying the stock injectors were 19lb , however. I've always heard 22lb, but I heard once 19lb. The 22lb tune didn't work as good as the 19lb tune, so I stuck with it. Think my injectors were cloged? I only have 23k on the odometer though. and they looked clean when they were removed.

[phoenix64]

I think njp98 is right.

42.5-22 = 20.5
42.5/20.5 = 2.07

So 2.00 should be lean, but I'm down to about 1.88 and I'm still a little rich.