Is the hole in this connector on the "Red Cube" too small for adequate fuelflow?

[ao.frog]

It has been rather difficult to find someone in Norway who can work on teflon fuel-lines. (I need to install the Red Cube FF-sensor on the fuel-line on my Lyc IO-360)

To make an attempt, I had a company do the best they could.
They had to make up a connector, but the hole in the connector they used is so small?

On the pic below, the orginal blue connector has a hole with ID just shy of 5/16 inch, so the hole in the connector the company made up (the black one) is much smaller.

My gut tells me that this hole is too small to give enough FF. What do you engine guru's out there think?

[mahlon_r]

The inlet at the engine flow divider is a -4 fitting and it will easily pass adequate fuel to the engine.
Good Luck,
Mahlon
"The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at your own risk."

[frankh]

Its a common misconception that if you have say a 1/2" pipe carrying water that you need a 1/2" valve on the end or it will cut back the flow.

In reality one time restrictions add a miniscule pressure loss..This why in high purity (expensive) systems you will see smaller valves than the pipe they are connected to.

Also this is the same reason, if you measure the pressure loss across a valve there is no measurable pressure loss until the valve is almost closed.

This is a long way of saying.."What Mahlon said"..

[AltonD]

I have the same setup. Works just fine.

[TS Flightlines]

Looks like to me that the Brown one is AN816-4-4D and the blue one is a AN816-6D. Pictures can be deceiving.
Teflon help is available in the states, US Priority mail is cheaper than Fed EX. Ask me how I know--

[Jimboscr]

If you still want the exact fitting did you try performance car / racing equipment suppliers. I have found they also use and thus supply the AN fittings.

Cheers

Jim

[ao.frog]

... for chiming in guys.

We'll use the connections as they are then.

[Mike S]

It is easy to test the flow, just remove the line at the fuel injection servo, or carb whichever you have, and run it into a bucket.

Hit the boost pump for 15 seconds, and see what kind of fuel flow you get.

Now insert the red cube with the small fitting into the setup, and repeat the flow test.

[penguin]

Alf Olav,

Send Tom at TS Flightlines an email - he can ship Teflon fuel pipes to Europe at a reasonable price.

Regards, Peter

[Snowflake]

Originally Posted by frankh

Its a common misconception that if you have say a 1/2" pipe carrying water that you need a 1/2" valve on the end or it will cut back the flow.

I agree that in a *static* system, that a 1/16" hole is no different than a 1" hole... In time the pressure on each side of the restriction will stabilize. But in a flowing system, there will be a flow loss. The important thing is whether it will be enough of a flow loss to cause a problem with your fuel flow.