Question about nozzle placement
#23
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Yah I put thse holes there for direct port nitrous back in the day, I wanted to get them as far upstream as possible to prevent reversion and help atomization. Should be ideal for water as well
#25
Yeah, totally missed that post. I must have written mine at the same time and didn't realize you posted.
I guess I need to order some more nozzles and such. Are you using a home built system or DO or ? on/off or progressive? what size nozzles?
I'm really interested in seeing how your setup works out.
I guess I need to order some more nozzles and such. Are you using a home built system or DO or ? on/off or progressive? what size nozzles?
I'm really interested in seeing how your setup works out.
#26
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No worries
It is a Devil's Own universal with additional fittings to split it into four ports. I am using DO 2 GPH external nozzles. It will be progressive, controlled by my Adaptronic, but not by pulsing the pump. I found a used Aquamist high-speed nozzle and will be using that, controlled via PWM from an aux output. I am leaning towards mapping the WI to the FI duty cycle; the Adaptronic can do this. It can map it to whatever you want really, so I could map it to RPM, MAP, throttle position, moon phase...
It is a Devil's Own universal with additional fittings to split it into four ports. I am using DO 2 GPH external nozzles. It will be progressive, controlled by my Adaptronic, but not by pulsing the pump. I found a used Aquamist high-speed nozzle and will be using that, controlled via PWM from an aux output. I am leaning towards mapping the WI to the FI duty cycle; the Adaptronic can do this. It can map it to whatever you want really, so I could map it to RPM, MAP, throttle position, moon phase...
#27
A high-speed check valve or solenoid will obviously prevent siphoning from the tank during vacuum, but I was wondering if you needed individual check valves to prevent siphoning fluid between the nozzles?
I don't know what's worse - the check-valves not opening at the same time or the small delay caused by having to fill up the empty lines.
--Ferdi
I don't know what's worse - the check-valves not opening at the same time or the small delay caused by having to fill up the empty lines.
--Ferdi
#29
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A high-speed check valve or solenoid will obviously prevent siphoning from the tank during vacuum, but I was wondering if you needed individual check valves to prevent siphoning fluid between the nozzles?
I don't know what's worse - the check-valves not opening at the same time or the small delay caused by having to fill up the empty lines.
--Ferdi
I don't know what's worse - the check-valves not opening at the same time or the small delay caused by having to fill up the empty lines.
--Ferdi
1. The pressure differential will probably be short lived, and also not that large, certainly nothing like the pressure differential caused by the pump. So the overall siphoning flow rates would be low. Plus at some point the water in the tubes would probably just oscillate back and forth and not actually leave the nozzle.
2. Even if the entire system downstream of the main check valve were evacuated, I do not think it would take very long at all to push out the air and recharge it with water once the pump turned on (or PWM valve opened, whatever). Air will push through the atomizing nozzles very quickly since it has a much lower viscosity. I am guessing a second or less. BUT even if it were significant, it would be easy to compensate for. For example, if you are triggering based on MAP, just set the turn-on point a little lower. That way the air is all gone well before you actually need the WI to prevent detonation.
In other words, I am not going to worry about it too much, and will only use one check valve. Hell just test it. Drain the system, turn on the pump, and see how long it takes before water sprays.
#32
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Speaking of which I guess that means I will have an unused check valve if anyone needs one. Not that they are expensive.
#39
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Tyson, what frequency are you planning to drive it at?