#11
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Re: Flow vs Pressure
ANSWERS IN CAPS
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Last edited by parmas; 21-05-2016 at 03:19 PM. |
#12
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Re: Flow vs Pressure
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#13
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Re: Flow vs Pressure
Thinking back at the configuration of the injection setup :
Trial number 1 100% Water Mixture : Would be using 4 pumps : two in series and two in parallel. From experience and studies when injecting water the primary aspect is droplet size. Droplet size works in direct relation to pressure. The more pressure used, the less the droplet size is. Working 2pumps in series would achieve a pressure of 320-400Psi . Nozzle size is still unknown although positioning two nozzles one pre-turbo and one post turbo could be enough. Direct port would be ideal for non-balanced plenums as not all cylinders could benefit equally from the setup. The problem is that water would not have enough time to evaporate if "large" nozzles are used. Combination of direct and post/pre turbo total of Six nozzle would be the best viable option for best distribution and cooling. Last edited by parmas; 21-05-2016 at 07:38 PM. |
#14
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Re: Flow vs Pressure
Fuel injectors, also ones for methanol, only need 45PSI. So any alcohol compatible fuel pump should do.
If you use a methanol compatible fuel cell, e.g. Small steel tank, there is no issue with having it in the car. The tank is vented as any other fuel tank. The boiling point of methanol is not that low. Folks use plastic canisters of methanol to run fuel cells in their camper vans. They typically are used in hot areas. |
#15
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Re: Flow vs Pressure
Check flow rates of air assisted foggers. Some have rather high flow rates.
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#16
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Re: Flow vs Pressure
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https://www.moranmotorsports.com/pro...mizer-injector Cost : $188 x 4 = $752 = £518 Aquamist Jets = £35 x 4 = £140 And that is only injectors.... A high flow methanol pump like Aeromotive costs more than 6 pumps altogether apart fuel regulator and engine management.... Fuel tanks: I always so plastic tanks in methanol setups and in a way I like it. Steel tend to heat the liquid more plus could be prone to corrosion plus it is more expensive and "heavier" aswell. To be exact methanol's boiling point is 64.7DegC. Let the car sit for a few hours in the sun on a summer day. I am sure you will see 60+DegC in it (tried and tested). Liquid inside would be less though.... just taking pre-cautions... |
#17
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Re: Flow vs Pressure
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- There is also issue regarding using an intermittent pump for continuous duty. - 300-400psi line pressure will impede the operation of and inline valve.
__________________
Richard L aquamist technical support |
#18
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Re: Flow vs Pressure
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Last edited by parmas; 22-05-2016 at 10:03 AM. |
#19
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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. |
#20
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Re: Flow vs Pressure
- You should not have any trace of water in the methanol. Even absorb from the water vapour from the air over time. Leave the fuel injector
- High pressure demands high current. Hight current means heat rise. The Aquatec specification is quite vague, " ... some pump can run for hours .... " - I cannot see a valve that will work at 450psi at 1600cc/min. Certain not from us.
__________________
Richard L aquamist technical support |
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