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11-11-2017, 05:11 PM
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Join Date: Dec 2012
Location: Greenback, TN
Posts: 534
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Resolved?
John,
Did you find the issue?
__________________
Marvin McGraw, 5TN4
RV-14. #140039 Complete
Flight hours: 500+
2020 Dues Paid
The Dues Paid note is a reminder for me
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11-11-2017, 05:28 PM
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Join Date: Aug 2013
Location: San Diego, Ca
Posts: 431
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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.
__________________
John Walker
RV-10 N265WD
"Miss Whiskey Delta"
BPE IO-540, FULL EFII
KMYF, San Diego, Ca.
KEOS, Neosho, MO
Crew Chief
Grove Aero Super Legacy Reno Racer,
twin turbo, IO-540,
full EFII management system!
Race Coordinator STOL Drag coming to Reno, 2019
"so I got that going for me... which is nice."
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11-11-2017, 05:40 PM
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Join Date: Dec 2012
Location: Greenback, TN
Posts: 534
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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?
__________________
Marvin McGraw, 5TN4
RV-14. #140039 Complete
Flight hours: 500+
2020 Dues Paid
The Dues Paid note is a reminder for me
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11-11-2017, 05:45 PM
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Join Date: Aug 2013
Location: San Diego, Ca
Posts: 431
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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.
__________________
John Walker
RV-10 N265WD
"Miss Whiskey Delta"
BPE IO-540, FULL EFII
KMYF, San Diego, Ca.
KEOS, Neosho, MO
Crew Chief
Grove Aero Super Legacy Reno Racer,
twin turbo, IO-540,
full EFII management system!
Race Coordinator STOL Drag coming to Reno, 2019
"so I got that going for me... which is nice."
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11-11-2017, 06:19 PM
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Join Date: Jan 2010
Location: Southern Michigan
Posts: 1,966
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Quote:
Originally Posted by Bluelabel
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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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.
__________________
David C.
Howell, MI
RV-10: #41686 Under Construction
RV-9A: #90949 Under Construction
RV-10: #40637 Completed/Sold 2016
Cozy MKIV:#656 Completed/Sold 2007
"Donor Exempt" but donated through Dec. 2020
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11-11-2017, 09:43 PM
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Join Date: Sep 2007
Location: BC
Posts: 1,674
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I'm thinking vapour lock. Where in the system is your fuel flow transducer?
Bevan.
__________________
RV7A Flying since 2015
O-360-A1F6 (parallel valve) 180HP
Dual P-mags
Precision F.I. with AP purge valve
Vinyl Wrapped Exterior
Grand Rapids EFIS
Located in western Canada
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11-12-2017, 01:39 AM
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Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,574
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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.
__________________
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet"
Hobbs 625
LS6-15/18W sailplane SOLD
bought my old LS6-A back!! 
VAF donation Jan 2020
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11-12-2017, 06:33 AM
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Join Date: Dec 2012
Location: Greenback, TN
Posts: 534
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Cones
Quote:
Originally Posted by scsmith
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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John,
Have you tried conical seals on the valve line fittings? This would address the possibility of air in the lines.
__________________
Marvin McGraw, 5TN4
RV-14. #140039 Complete
Flight hours: 500+
2020 Dues Paid
The Dues Paid note is a reminder for me
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11-12-2017, 09:16 AM
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Join Date: Aug 2013
Location: San Diego, Ca
Posts: 431
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Quote:
Originally Posted by Bevan
I'm thinking vapour lock. Where in the system is your fuel flow transducer?
Bevan.
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Well, the good thing about the EFII system is I don?t need one of those. The system sends a fuel flow signal to my Garmin. Once you get the Kfactor number dialed in, it?s super accurate.
Quote:
Originally Posted by M McGraw
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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I have not, I didn?t even know that existed, but I?ll do some research on them. THX
__________________
John Walker
RV-10 N265WD
"Miss Whiskey Delta"
BPE IO-540, FULL EFII
KMYF, San Diego, Ca.
KEOS, Neosho, MO
Crew Chief
Grove Aero Super Legacy Reno Racer,
twin turbo, IO-540,
full EFII management system!
Race Coordinator STOL Drag coming to Reno, 2019
"so I got that going for me... which is nice."
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11-12-2017, 09:45 AM
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Join Date: Nov 2017
Location: Poplar Grove
Posts: 1
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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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