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  #31  
Old 11-11-2017, 06:11 PM
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M McGraw M McGraw is offline
 
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Default Resolved?

John,
Did you find the issue?
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  #32  
Old 11-11-2017, 06:28 PM
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Bluelabel Bluelabel is offline
 
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Location: San Diego, Ca
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Kind of resolved....
I did not find an issue as far as something I could fix.
No leaking in the fuel system. Put a wrench on all the fittings and gave them a little snug.
My new OP is to hit "Both Pumps" when switching tanks.
Hasn't happened since July.

Of course it hasn't been as hot.
I really think it has something to do with the heat. I'm certainly not able to duplicate it.
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RV-10 N265WD
"Miss Whiskey Delta"
BPE IO-540, FULL EFII
KMYF, San Diego, Ca.
KEOS, Neosho, MO

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full EFII management system
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  #33  
Old 11-11-2017, 06:40 PM
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M McGraw M McGraw is offline
 
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Location: Greenback, TN
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Default Fuel pressure

I agree, that is a lot of engine, extra fuel won't hurt in high temps. Keep us up to date. Are your fuel pumps on the cold side of the firewall?
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  #34  
Old 11-11-2017, 06:45 PM
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Bluelabel Bluelabel is offline
 
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They are... even thought the tunnel in the 10 notoriously has heat issues.

I do have gold heat reflective panels on the belly right above the exhaust (which did make significant difference the the temp of the floors when flying). Plus I have the tunnel well insulated as well as the firewall.... so, I've done what I can to control those temps.
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John Walker
RV-10 N265WD
"Miss Whiskey Delta"
BPE IO-540, FULL EFII
KMYF, San Diego, Ca.
KEOS, Neosho, MO

Crew Lead on the
Grove Aero Super Legacy Reno Racer,
twin turbo, IO-540,
full EFII management system
!

"so I got that going for me... which is nice."
2017 Dues Paid"
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  #35  
Old 11-11-2017, 07:19 PM
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9GT 9GT is offline
 
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Quote:
Originally Posted by Bluelabel View Post
They are... even thought the tunnel in the 10 notoriously has heat issues.

I do have gold heat reflective panels on the belly right above the exhaust (which did make significant difference the the temp of the floors when flying). Plus I have the tunnel well insulated as well as the firewall.... so, I've done what I can to control those temps.
In addition to insulating the tunnel, I fire-sleeved all the aluminum fuel lines in there and had a split fire sleeve that fit around my Andair fuel pump, with the the filter and Red Cube transducer. Never a hiccup switching tanks, even without the boost pump ON running mogas. I used the red silicone Stratoflex stuff.
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  #36  
Old 11-11-2017, 10:43 PM
Bevan Bevan is offline
 
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I'm thinking vapour lock. Where in the system is your fuel flow transducer?

Bevan.
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  #37  
Old 11-12-2017, 02:39 AM
scsmith scsmith is offline
 
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Location: Ashland, OR
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My vote would still be that air is getting into the unused line at the fuel selector valve. Depends a lot on the design of the valve, and I am not familiar with the Andair, so I can't help with details.
But I think a lack of fuel in the line you are switching to is the only hypothesis that fits the observations.
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  #38  
Old 11-12-2017, 07:33 AM
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M McGraw M McGraw is offline
 
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Location: Greenback, TN
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Quote:
Originally Posted by scsmith View Post
My vote would still be that air is getting into the unused line at the fuel selector valve. Depends a lot on the design of the valve, and I am not familiar with the Andair, so I can't help with details.
But I think a lack of fuel in the line you are switching to is the only hypothesis that fits the observations.
John,
Have you tried conical seals on the valve line fittings? This would address the possibility of air in the lines.
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  #39  
Old 11-12-2017, 10:16 AM
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Bluelabel Bluelabel is offline
 
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Location: San Diego, Ca
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Quote:
Originally Posted by Bevan View Post
I'm thinking vapour lock. Where in the system is your fuel flow transducer?

Bevan.
Well, the good thing about the EFII system is I donít need one of those. The system sends a fuel flow signal to my Garmin. Once you get the Kfactor number dialed in, itís super accurate.

Quote:
Originally Posted by M McGraw View Post
John,
Have you tried conical seals on the valve line fittings? This would address the possibility of air in the lines.
I have not, I didnít even know that existed, but Iíll do some research on them. THX
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John Walker
RV-10 N265WD
"Miss Whiskey Delta"
BPE IO-540, FULL EFII
KMYF, San Diego, Ca.
KEOS, Neosho, MO

Crew Lead on the
Grove Aero Super Legacy Reno Racer,
twin turbo, IO-540,
full EFII management system
!

"so I got that going for me... which is nice."
2017 Dues Paid"
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  #40  
Old 11-12-2017, 10:45 AM
PFEIFFO PFEIFFO is offline
 
Join Date: Nov 2017
Location: Poplar Grove
Posts: 1
Default Switching fuel tanks.

Never ever experienced that ( 270 hrs on RV10), Have fuel injection and never turn on fuel pump while switching tanks in either my RV 8 or RV10. Is all your system in the tunnel or part on top the engine? D Pfeiffer
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