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Author Topic: EFI Injector testing fluid,,  (Read 908 times)
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stay`tee
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« on: July 10, 2018, 06:41:31 AM »

For Methanol fuel, what test fluid would you/do you recomend using ??
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« Reply #1 on: July 12, 2018, 07:51:19 PM »

Methanol grin
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« Reply #2 on: July 12, 2018, 09:09:11 PM »

What are you testing to discover?
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« Reply #3 on: July 13, 2018, 04:18:30 AM »

Uniformity/Sprayability, so I figger something with properties similar to Methanol without the worrie of combustion,,

ie, something with a SG of .792
« Last Edit: July 13, 2018, 04:27:12 AM by stay`tee » Logged

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« Reply #4 on: July 13, 2018, 07:44:07 AM »

Mineral spirits will probably be your most affordable solution. The viscosity will be a little off, but you can get a few different specific gravity weights if you look for it. Methanol looks to have a specific gravity around 0.78. The Klean Strip Odorless Mineral Spirits from Home Depot has a specific gravity of 0.78. You can usually find the MSDS sheets from the manufacturer on-line and that will give you a lot of the properties that you can compare with the type of fuel you want to run. Here is a link for the Klean Strip stuff http://www.kleanstrip.com/uploads/documents/GKSP94006_SDS-GL251.pdf

N-Heptane is a fluid that has become the "standard" for injector test stands, but is kinda pricey. Last I looked it was a $100.00+ per liter.

I have used mineral spirits a lot. Just be sure to have your area well ventilated and wear some safety equipment, it really burns when it gets in your eyes and will make you smell funny for a day or so when a line comes off and hoses you down.

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« Reply #5 on: July 13, 2018, 08:46:04 PM »

JW;

I think "kinematic viscosity" is a more important criterion than specific gravity.

Regards, Neil  Tucson, AZ
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Regards, Neil  Tucson, AZ
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« Reply #6 on: July 14, 2018, 05:42:00 AM »



I think "kinematic viscosity" is a more important criterion than specific gravity.

Regards, Neil  Tucson, AZ
[/quote]


What you talkin'bout Willis  smiley ,Can you please explain why Sir, ??
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« Reply #7 on: July 14, 2018, 11:30:23 AM »



I think "kinematic viscosity" is a more important criterion than specific gravity.

Regards, Neil  Tucson, AZ


What you talkin'bout Willis  smiley ,Can you please explain why Sir, ??
[/quote]

Specific gravity isn't what is important in this case- it is only a measure of density. Two fluids can have similar specific gravity but one can pour like water and the other like Karo syrup.

The term "Viscosity" is pretty well understood since we all use an oil of some viscosity number in our engines, etc. "Kinematic" viscosity is the apparent thickness (resistance to flow) of a fluid when it is flowing fast through a small hose, orifice, fuel injector, etc. Viscosity of many fluids changes as the flow rate increases.

An extreme example of this is a "Non-Newtonian" fluid. Drop a marble into a pan of it and it hits the surface and sinks to the bottom as one would expect. However, if it hits the surface at high speed, the fluid acts like concrete.

These questions may be on the Final Exam.   grin

Regards, Neil  Tucson, AZ
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« Reply #8 on: July 14, 2018, 02:29:09 PM »

Blinker fluid. grin

Running alky I test them with alky but flush them with gas.
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« Reply #9 on: July 14, 2018, 08:42:58 PM »

JW;

I think "kinematic viscosity" is a more important criterion than specific gravity.

Regards, Neil  Tucson, AZ

https://www.engineeringtoolbox.com/dynamic-absolute-kinematic-viscosity-d_412.html

Johnboy cheers
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« Reply #10 on: July 14, 2018, 09:41:23 PM »

JW;

I think "kinematic viscosity" is a more important criterion than specific gravity.

Regards, Neil  Tucson, AZ

https://www.engineeringtoolbox.com/dynamic-absolute-kinematic-viscosity-d_412.html

Johnboy cheers

Touche, Johnboy. I should have said "dynamic" instead of "kinematic" viscosity.

That viscosity chart confirmed my recollection from high school Chemistry- that glass is a "super-cooled liquid" not really a solid.

Regards, Neil  Tucson, AZ
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« Reply #11 on: July 15, 2018, 05:26:43 AM »

"Thankyou" Neil and Johnboy,, some study for me too do  smiley
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« Reply #12 on: July 15, 2018, 05:32:23 AM »



Running alky I test them with alky but flush them with gas.
  Sid.

So your saying too do the various tests with Alky, but then flush the tester/cleaner system with a non corrosive fluid ??
« Last Edit: July 15, 2018, 05:36:49 AM by stay`tee » Logged

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« Reply #13 on: July 15, 2018, 07:56:38 AM »



Running alky I test them with alky but flush them with gas.
  Sid.

So your saying too do the various tests with Alky, but then flush the tester/cleaner system with a non corrosive fluid ??


EXACTLY!!!    cheers cheers cheers

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« Reply #14 on: July 16, 2018, 05:44:33 AM »

Appears as tho I will use the real thing, that is Methanol  cool,, Thankyou gentleman  smiley
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