Speed density alky controller question
- Thread starter qwiketz
- Start date
a maf is 0-5 volts right? So how do you initially set it then to turn on at a specific psi? Do you have to do a trial and error type deal? I have a two bar map sensor for my crane hi 6 btm, so I'll patch into that wiring. Turn on would be 3 or 4 psi and full would be 9 psi.
you mean a map is 0-5 volts right?
the voltage output of the map corresponds to a given KPA, the kit is designed to use x voltage from the map as a reference (whatever you happen to set it at) as a turn on point and then progressively ramps alcohol in relative to the voltage increase from the map
the point at which the kit turns on is a trial and error type deal. You cant say it would be 3 or 4 psi without having ever used it because the optimal setting could be anything
the voltage output of the map corresponds to a given KPA, the kit is designed to use x voltage from the map as a reference (whatever you happen to set it at) as a turn on point and then progressively ramps alcohol in relative to the voltage increase from the map
the point at which the kit turns on is a trial and error type deal. You cant say it would be 3 or 4 psi without having ever used it because the optimal setting could be anything
Pablo..your good 
There are two types of MAF's.. frequency and voltage. And there are applications where running a MAF signal is better than MAP for the alky. Perfect example is a whipple blower..whereas it will make 10 PSI boost at 2000 RPM and max out at 4200 RPM's.. so its boost curve is totally un-linear. A MAF then will output voltage based on the airflow the sensor see's..if 5 PSI =2.4volts.. thats where its setup to come on at.
The Ford MAF's are voltage based. That 90mm MAF is one bad animal
The GM MAF's are frequency based. And the Vette's typically will pin a Z06 MAF making some power.. so on those.. they get setup on MAP anyways.
On the centrifugals MAP is the way to go. A 2bar sensor will read in boost from 2.35-4.8vdc approx. So you set the controller to fire at 2.9vdc and have it ramp up as aggressive as needed. Easy.
Cool..
There are two types of MAF's.. frequency and voltage. And there are applications where running a MAF signal is better than MAP for the alky. Perfect example is a whipple blower..whereas it will make 10 PSI boost at 2000 RPM and max out at 4200 RPM's.. so its boost curve is totally un-linear. A MAF then will output voltage based on the airflow the sensor see's..if 5 PSI =2.4volts.. thats where its setup to come on at.
The Ford MAF's are voltage based. That 90mm MAF is one bad animal
The GM MAF's are frequency based. And the Vette's typically will pin a Z06 MAF making some power.. so on those.. they get setup on MAP anyways.
On the centrifugals MAP is the way to go. A 2bar sensor will read in boost from 2.35-4.8vdc approx. So you set the controller to fire at 2.9vdc and have it ramp up as aggressive as needed. Easy.
Cool..
