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How many mph wmi?

Nessmuk

Nessmuk

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East Amazonian polar region
I have a snow wmi system, running one small nozzle. If it runs say 50 percent of the time, how far will 15 gallons get me down the road?
I realise this is a matter of precise numbers, absolute answers, and will hold anyone liable to a lifetime of Internet harassment if your off by a quarter mile even.
 
Depends on what percentage you are injecting at and tank size. Mine just cruising would bounce between 0-50%. I ran a 375 and 625ml/min nozzle, or a liter a minute at full injection. With a 2.5 gallon tank and liter to gallon conversion and 50% injection, under perfect world conditions, it would last 18.92 minutes. At 60mph, it would last for about 19 miles. Under actual world conditions, it will only last about about 10-12 miles at 50% injection. If you take into account variable injection rate (Snow does a 25-50-75-100 rate climb) then you might be able to push those numbers up to 15-20miles. I run a Snow Stage 3 Boost Cooler in mine.
 
If you consider a small nozzle the 60ml/min. I think I did the math wrong, but with 15 gallons at 50% injection on a 60ml/min nozzle at 60mph, I'm going to guess 1890 miles lol I never was super good at math and things though lol
 
You need to bench test your nozzle at the normal voltage of your system with your pump.
3 Variables at play here.

Nozzle: lets say your nozzle is rated 2 gallons an hour. That may be what it is rated, but maybe it is really 1.9gph, but 2gph is what they call it. Then individual tolerances in mass production so maybe it is really 1.85, or 1.8. Maybe 2.05 or 2.1... so big variable there.

Pump: Maybe rated "x" pressure at "y" volume. But there again what they call it vs what yours really is after mass production.

Voltage: couple details about all dc motors - if they work on dc, then it is both a reverseable motor and more importantly here- a variable speed motor. So if your alternator keeps everything at 12.9 volts in 1 truck and your other truck runs at 14.4 volts, the second one will spin that motor faster all the way up the graph and will therefore push more gph out the same exact nozzle.

So a bench test will get you closest to accurate estimate. Of course the fact that you have boost pressure in the intake to deal with as a resistant factor slowing the flow is there- or if you are injecting pre turbo then maybe less resistance...

I say find some descent sized plastic tanks to fit down outside the frame in the unused cavities and have some really descent supply available. Maybe order sheets of plastic online and get a plastic welder? Or talk to an rv shop about what sizes they can order. I would think a tank large enough to last a tank of fuel would be considered.

Absolutely, best opening to a thread I have seen in some time.
 
Will L. said:
You need to bench test your nozzle at the normal voltage of your system with your pump.
3 Variables at play here.

Nozzle: lets say your nozzle is rated 2 gallons an hour. That may be what it is rated, but maybe it is really 1.9gph, but 2gph is what they call it. Then individual tolerances in mass production so maybe it is really 1.85, or 1.8. Maybe 2.05 or 2.1... so big variable there.

Pump: Maybe rated "x" pressure at "y" volume. But there again what they call it vs what yours really is after mass production.

Voltage: couple details about all dc motors - if they work on dc, then it is both a reverseable motor and more importantly here- a variable speed motor. So if your alternator keeps everything at 12.9 volts in 1 truck and your other truck runs at 14.4 volts, the second one will spin that motor faster all the way up the graph and will therefore push more gph out the same exact nozzle.

So a bench test will get you closest to accurate estimate. Of course the fact that you have boost pressure in the intake to deal with as a resistant factor slowing the flow is there- or if you are injecting pre turbo then maybe less resistance...

I say find some descent sized plastic tanks to fit down outside the frame in the unused cavities and have some really descent supply available. Maybe order sheets of plastic online and get a plastic welder? Or talk to an rv shop about what sizes they can order. I would think a tank large enough to last a tank of fuel would be considered.

Absolutely, best opening to a thread I have seen in some time.
Click to expand...
Then there is the absolute manifold pressure under boost the pump has to overcome.
 
It's been 2 years since I bought it, 1 year since I put it on. I still haven't used it as the truck seems to fix better than it runs. I remember buying from snow, and running a smallest nozzle.
 
The ability to run wmi with komputer input is my biggest letdown (is that a word) of the db2. What I have heard they are good with customer service answering questions on their stuff.

Also- help me out a little on your meme with the cat-??
 
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