Author Topic: Gascolators; yay or nay?  (Read 457 times)

shocktrooper

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Gascolators; yay or nay?
« on: Nov 03, 2017 »
My bird was delivered to me sans a gascolator, and had only a straight fuel line with an inline filter between the cutoff valve and the inlet port of the (former installed) Revmaster injector body carb. As stated in my earlier "AeroVee Aeroinjector woes" post, I am now running said injector. I bought and installed a quality non TSOd gascolator when I changed out the Revmaster. Now...I have heard a rumor that I was, "better off without the gascolator", due to potential for vapor lock and fuel starvation. As I saw it...I did not like the idea of not having a gascolator due to no way to sump the fuel of water and solids, before induction to engine.
Anyone out there have some comment or previous experience with their bird with or without a gascolator, and/or vapor lock, due to gascolator getting hot from eng. heat?
I located mine on the bottom RH side, with a quite-short metal braided fuel line, exiting the out side of the gascolator, sitting approx. 1.5 - 2'' below the inlet side of the Aeroinjector. I have plenty of gravity fuel flow avail. (computed approx. 17 gal per hr) with 5 gal in tank, and acrft. sitting static on the mains and tailwheel.
I have not flown her or high speed taxied yet...as still dialing-in the new injector, and she is due a condition inspection at this time.
...anyone?...
Proud American, US Army vet and retired A&P. Now, at last, I can have some fun!

Kevin R.

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Re: Gascolators; yay or nay?
« Reply #1 on: Nov 03, 2017 »
I'm in favor of gascolator or at least a low point drain for reasons you mentioned. 

I use a low point drain at the lowest point on the firewall enroute to injector carb.  I copied Fred's idea.  A firewall mounted block with NPT threads on both sides and a standard push to drain thingy on bottom.

Kevin

mhflyit

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Re: Gascolators; yay or nay?
« Reply #2 on: Nov 03, 2017 »
Ditto Kevin's comment. Fred designed low point manifold/drain.
Matt

Pttim

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Re: Gascolators; yay or nay?
« Reply #3 on: Nov 03, 2017 »
My gascolater is located cockpit side of firewall.  Has screen and paper filter, I like the idea of having low fuel point drain.
Pttim
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Kevin R.

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Re: Gascolators; yay or nay?
« Reply #4 on: Nov 03, 2017 »
Ref. Tim's post on filtration, I use an inline filter from J&P cycles upstream of low point drain.  It is all metal with replaceable filter cartridges.

Kevin

mhflyit

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Re: Gascolators; yay or nay?
« Reply #5 on: Nov 03, 2017 »
A picture to help...
Matt

Bil438

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Re: Gascolators; yay or nay?
« Reply #6 on: Nov 03, 2017 »
I have a Gascolator for all those reasons above, and because neither 100LL or 97autogas have any ethanol so I want to be able to get any water out of the fuel. Mine is located cockpit side of firewall at the bottom left corner. Works well. Worth noting that I have a facet pump to be sure of fuel fuel flow when the header tank gets below half.
If you got a Holley 0.5 psi fuel pressure regulator then you could also run a pump to your aeroinjector. I never really trusted Isaac Newton and his theory of gravity.
Bill E

mhflyit

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Re: Gascolators; yay or nay?
« Reply #7 on: Nov 03, 2017 »
Gravity never stops working (make sure its working in the right direction!  ;) ) - keep it simple. I have no need for a pump in my system.
« Last Edit: Nov 03, 2017 by mhflyit »
Matt

Pttim

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Re: Gascolators; yay or nay?
« Reply #8 on: Nov 03, 2017 »
Ditto Matt!  My system flows and runs the engine until zero fuel in tank.
Pttim
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Raceair

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Re: Gascolators; yay or nay?
« Reply #9 on: Nov 04, 2017 »
Most of the FV guys got rid of gascolators in the engine compartment,   especially if running a 4 into 1 header.  Blueberry had a small Pet-Cock in the cockpit under the tank in the low spot,   so fuel could be drained into a bucket if needed.

 

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