Posts by Bean
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you dont need an FMU!!!
i think i've said this 20 times
it applies to cars that dont have the ability to read either positive manifold pressure or just general airflow... AKA speed density, a la Hondas... these cars run on a speed density system that measures manifold pressure and temperature to gauge how much fuel needs to be injected... it is great because there is less restrictions in the system, but on hondas the ECUs WILL NOT read positive manifold pressure (aka boost) and when introduced to this they crap out, therefore a cheater system has to be used... a one way check valve is used to keep the BAR sensor from reading positive pressure, only vacuum, this cheater system that now allows boost cannot compensate for the increased air intake, therefore an FMU must be used to increase the fuel pressure a certain amount per psi of boost....
our cars use a karman vortex metering system... they measure AIRFLOW not PRESSURE like the speed density system... this airflow is measured by the small honeycomb shaped grille (in the MAF itself) causing small little vortexes of air after the air passes through it; afterwards there is a sensitive speaker that measures how many vortexes it senses and uses this to gauge how much air is flowing into the system (into the turbo)... this is why the karman vortex reads in hertz instead of pressure
the stock airflow system is capable of reading the airflow from a turbocharged system... how do i know? i'm running my stock turbo with completely stock fuel including fuel pump... i'm only running an AFC to get a bit more power from tuning; the car still runs great without it... in fact it runs pretty rich...
i bet there's enough fuel stock for 300rwhp or more at stock CR
a BOV is still a good idea at 7psi... they are dirt cheap and even compressor surge at low boost is a bad thing; it also can get really annoying...
if there's anymore questions about this let me know
i think i've said this 20 times
it applies to cars that dont have the ability to read either positive manifold pressure or just general airflow... AKA speed density, a la Hondas... these cars run on a speed density system that measures manifold pressure and temperature to gauge how much fuel needs to be injected... it is great because there is less restrictions in the system, but on hondas the ECUs WILL NOT read positive manifold pressure (aka boost) and when introduced to this they crap out, therefore a cheater system has to be used... a one way check valve is used to keep the BAR sensor from reading positive pressure, only vacuum, this cheater system that now allows boost cannot compensate for the increased air intake, therefore an FMU must be used to increase the fuel pressure a certain amount per psi of boost....
our cars use a karman vortex metering system... they measure AIRFLOW not PRESSURE like the speed density system... this airflow is measured by the small honeycomb shaped grille (in the MAF itself) causing small little vortexes of air after the air passes through it; afterwards there is a sensitive speaker that measures how many vortexes it senses and uses this to gauge how much air is flowing into the system (into the turbo)... this is why the karman vortex reads in hertz instead of pressure
the stock airflow system is capable of reading the airflow from a turbocharged system... how do i know? i'm running my stock turbo with completely stock fuel including fuel pump... i'm only running an AFC to get a bit more power from tuning; the car still runs great without it... in fact it runs pretty rich...
i bet there's enough fuel stock for 300rwhp or more at stock CR
a BOV is still a good idea at 7psi... they are dirt cheap and even compressor surge at low boost is a bad thing; it also can get really annoying...
if there's anymore questions about this let me know
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