Wouldnt open ports make it run lean under 3.5k?
06-06-07, 09:16 PM
#1
Wouldnt open ports make it run lean under 3.5k?
Would they?
Because I barely drive my car over 4k unless on the highway.
I checked my plugs and they are indicating a lean setting.
I mean with the ports open, isnt more air going in when only the primary injectors are firing, where normally when the ports do work at 3.5k it opens up along with the secondaries.
Isnt this why there is no torque below the 3.5k range.
i would setup my safc to run a little rich under 3.5k to see if it stop running lean and it did......and I swear it had some grunt under 3.5k then before I riched it.
Because I barely drive my car over 4k unless on the highway.
I checked my plugs and they are indicating a lean setting.
I mean with the ports open, isnt more air going in when only the primary injectors are firing, where normally when the ports do work at 3.5k it opens up along with the secondaries.
Isnt this why there is no torque below the 3.5k range.
i would setup my safc to run a little rich under 3.5k to see if it stop running lean and it did......and I swear it had some grunt under 3.5k then before I riched it.
06-06-07, 09:24 PM
#2
No, it wont cause it to run lean. The amount of fuel injected is determined by the amount of air entering the engine. Regardless of whether or not the ports are open, the AFM still sees the correct amount of air entering, thus you have the correct amount of fuel.
The low power cause by stuck open ports is due to the fact that the increased port timing and size kills the intake velocity which lowers power, to put it simply.
The low power cause by stuck open ports is due to the fact that the increased port timing and size kills the intake velocity which lowers power, to put it simply.
06-06-07, 09:42 PM
#3
No, it wont cause it to run lean. The amount of fuel injected is determined by the amount of air entering the engine. Regardless of whether or not the ports are open, the AFM still sees the correct amount of air entering, thus you have the correct amount of fuel.
The low power cause by stuck open ports is due to the fact that the increased port timing and size kills the intake velocity which lowers power, to put it simply.
The low power cause by stuck open ports is due to the fact that the increased port timing and size kills the intake velocity which lowers power, to put it simply.
got it now.......it was always in my mind for 3 freaking years....hahaha
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