How to inject water rpm based ?
- Thread starter 1TONY1
- Start date
Welcome!
By registering with us, you'll be able to discuss, share and private message with other members of our community.
Tony, working on MAF and RPM..but wont be ready till later this year.. I have a few things I want to do.. and really havent had requests/time.
It may just be a simple frequency to voltage converter tied into the MAP input of my progressive.. but simple sometimes isnt so simple
As far as I know, Edelbrock varijection is the only one I know, but its reliability has been very very questionable.
HTH
It may just be a simple frequency to voltage converter tied into the MAP input of my progressive.. but simple sometimes isnt so simple
As far as I know, Edelbrock varijection is the only one I know, but its reliability has been very very questionable.
HTH
I know of at least one system that uses the ground from an injecter wire. That would be kinda rpm based by using the increase in pulse width, but I don't know how they are converting the signal. Right now, I am using my engine controller to turn it oon based on any boost or any rpm or a combo of the two. My current turn on point requirements are 3.4 psi and 2500 rpm....both must be met. This contoller can also run an extra injector so I have the ground output/pulse width with total control but I am not sure how to use that signal. To chatter a relay or solinoid or some electrical way to vary the voltage.
This is on a screw type s/c that has full boost at 2500 rpm, that's why boost reference won't help me vary the waterflow. I have two nozzles and could stage them.....one to come on at full throttle (throttle switch) and the other could be rpm activated by the engine controller.
This is on a screw type s/c that has full boost at 2500 rpm, that's why boost reference won't help me vary the waterflow. I have two nozzles and could stage them.....one to come on at full throttle (throttle switch) and the other could be rpm activated by the engine controller.
Well actually my controller wants to see 1.6 to 5vdc signal since thats the boost range on a 3 bar sensor. But thats something I can change. Also it can accept a voltage up to 9vdc on its signal.. so it can make corrections up to a 9 volt signal.
How often does the motor see 2500 RPM's at wot? And how long does it stay at 2500 RPM's? Reason I ask is you may be putting the cart before the horse on this. Sometimes what you think, and what actually takes place are two different things. I typically see a downshift occur or RPM's to be way higher when running the motor. Example your on the highway.. downshift to 2nd..hit the pedal.. wont be at 2500 or anywhere near it. And by the time you hit the pedal, lines finish priming, nozzle sprays, gets into the cylinder.. your motor is no where near 2500 RPM's. Plus since the signal tells the system to ramp up.. it takes a lot longer for the motor to see full pressure. Your thinking stuff happens like lightning..BAM!.. the pump motor has mass, it has to build pressure, all of this takes time. And why trying to get a controller than can make rapid changes doesnt work unless the pumps being used are very small and very fast response. Its not a fuel injector sitting above your intake valve with 70 PSI pressure behind it.
Reason I bring this up is I sell a lot of these boost referenced controllers to cars that run SC's.. and no complaints.
The controlling the pump off of injector DC has the range problem. While sorta progressive, not really. Its all in way too quick. RPM based systems are great for NA applications, since thats the only thing they can reference off of.
Good thoughts... hehe
How often does the motor see 2500 RPM's at wot? And how long does it stay at 2500 RPM's? Reason I ask is you may be putting the cart before the horse on this. Sometimes what you think, and what actually takes place are two different things. I typically see a downshift occur or RPM's to be way higher when running the motor. Example your on the highway.. downshift to 2nd..hit the pedal.. wont be at 2500 or anywhere near it. And by the time you hit the pedal, lines finish priming, nozzle sprays, gets into the cylinder.. your motor is no where near 2500 RPM's. Plus since the signal tells the system to ramp up.. it takes a lot longer for the motor to see full pressure. Your thinking stuff happens like lightning..BAM!.. the pump motor has mass, it has to build pressure, all of this takes time. And why trying to get a controller than can make rapid changes doesnt work unless the pumps being used are very small and very fast response. Its not a fuel injector sitting above your intake valve with 70 PSI pressure behind it.
Reason I bring this up is I sell a lot of these boost referenced controllers to cars that run SC's.. and no complaints.
The controlling the pump off of injector DC has the range problem. While sorta progressive, not really. Its all in way too quick. RPM based systems are great for NA applications, since thats the only thing they can reference off of.
Good thoughts... hehe
Similar threads
