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#1
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Re: Flow vs Pressure
The injection control valve will only work to some max. Pressure. Check the data sheet of the valve you use.
Doubling pressure only gains you some 40% more flow. Pipe fittings become challenging at such high pressure. The pump case might not sustain 450PSI vs. the outside and leak or crack. The serial arrangement is not necessary. Just use them in parallel and get the jets yOu need for the flow you need. you can always just add more. My system is based on the old AM 2c system. I have now replaced the race pump with a Flotec pump. Otherwise it stil works the same. 150 PSI rail pressure buffered by a accumulator. The mix is metered by a HSV PWM control valve. I think AM now seems a FAV (fast acting valve). My flow indication is the pump running indicated by a LED: if it blinks or illuminates, the mix is flowing. The faster it blinks, the more I flow. There is no reason to build something like this, just with 4 pumps and the according number of jets. Likely a single FAV will flow enough. Fuel injectors are ethanol and fuel compatible these days. MEthnaol compatible injectros are likely identical except someone did the effort to test compatibility. Common to all fuel injectors is that they cannot tolerate water similar to fuel pumps with ther fuel cooled rotors. They corrode from the water. You need special metering valves that are designed to be compatible with with water. They are not common. Aquamist is one of the few (actually the only one) selling those. I have a HSV under ECU control and it is one fine piece of valve. Current modulation frequency is set to 80Hz. Pure methanol corrodes aluminium if exposed over prolonged periods of time in a container, especially if contaminated by acids or bases breaking down the passivity on layer of aluminium. Water reduces this effect. That is why storing 50:50 mixes causes no issues. Are you sure your race fuel shop cannot provide race spec e85? It would make your life much easier as you could use mostly common fuel pumps and injectors for a secondary injection system. Then again, add water as necessary with your current WMI system. |
#2
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Re: Flow vs Pressure
Quote:
Last edited by parmas; 23-05-2016 at 05:04 AM. |
#3
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Re: Flow vs Pressure
I was referring to a PWM valve, not a checkvalve.
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Richard L aquamist technical support |
#4
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Re: Flow vs Pressure
What if I use 4 pumps each connected directly to each nozzle (4) and each pump has its own PWM control valve. This will eliminate problem of pumps overheating/overpressing + PWM control valve flowrate.
Option 1 : All 4 PWM control valves wired together so they activate all together according duty cycle managed by ecu map. Option 2 : Each PWM control valve connected to primary injectors (example injector 1 with PWM nozzle 1 etc..) Since the injection needs to happen on boost the ecu switches on pumps when the engine is on boost and manage flow according PWM duty cycle managed by ecu map. What do you think Richard/Rotrex ? |
#5
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Re: Flow vs Pressure
As the jets mostly flow all the time under boost,I.e. Valve is open, you might get away with a single or two fast acting valves. Timed sequencial injection has little benefits for what you want to do.
Richard should know the max flow rate of the current fast acting valve FAV. |
#6
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Re: Flow vs Pressure
There are two FAVs with flow rates 1600cc (806-239) and 1300cc (standard 806-239B).
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Richard L aquamist technical support |
#7
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Re: Flow vs Pressure
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I am trying to find find one that actually can work with 100% water if possible. Any ideas Richard? |
#8
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Re: Flow vs Pressure
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Aquamist FAV : Warning: never run hydrocarbon contaminated fluid through this valve. The internal EPDM seal is subject to severe swelling if 99% pure methanol is not used. Always use 99% methanol from a factory sealed canister. Transfer pump or jugs should be free of any previous hydrocarbon usage. Washing the container with detergent will not stop methanol drawing out the hydrocarbon from a plastic container laced with gasoline. Aquamist Pump : Warning: Prolonged use of 100% methanol may cause premature pump failure and may not be covered under warranty - this warning applies to all Aquatec pumps. Is this contradictory? 99% Methanol may damage pump while less may damage FAV.... |
#9
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Re: Flow vs Pressure
He just means 99% purity methanol, but this mixed with distilled water.
Richard, can the older HSV take a ethanol / water mix? Ethanol is way cheaper than methanol for me here in Germany. |
#10
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Re: Flow vs Pressure
Maybe Richard could explain it better?
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