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09-17-2012, 12:17 PM
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Join Date: Apr 2006
Location: Martinsville, IN
Posts: 470
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9A/mogas/lyc 160
Hello and I have searched and read. (beat you to it  )
1st hand experience in the 9A with low compression 160 HP lyc running mogas? My intentions are, to keep 1 side 100LL and use only for take off and landing, while using the mogasen routee. I would switch over entirely, after it being proven in my plane. My neighbor runs it in his C140, similar engine, but his piping isobviouslyy different...hence why I'm being model specific and asking only 9A owners. Thank...DM
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09-17-2012, 12:35 PM
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Join Date: Jul 2007
Location: Taylorsville, Ga
Posts: 798
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run 93 Octane with no ethynol
regularly in my RV -9. has 0320 D2J 160 HP with mid range compression pistons. I also use one side for the 93 and have 100LL in the other side. Almost always use the 100LL for take off and landings and to just purge the 93 out of the piping for when it sits in the hanger. After climb out and power back to cruise switch over to the 93. have not seen any adverse effect. If you do climb out on a hot day with the 93 especially with hot engine the CHT will go a bit higher that they do with the 100LL . Will see 425F until you either power back or get some higher airspeeds.
__________________
DRRhodes
2020 VAF Supporter
RV9 N908DR
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09-17-2012, 01:03 PM
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Join Date: Apr 2006
Location: Martinsville, IN
Posts: 470
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Quote:
Originally Posted by DennisRhodes
regularly in my RV -9. has 0320 D2J 160 HP with mid range compression pistons. I also use one side for the 93 and have 100LL in the other side. Almost always use the 100LL for take off and landings and to just purge the 93 out of the piping for when it sits in the hanger. After climb out and power back to cruise switch over to the 93. have not seen any adverse effect. If you do climb out on a hot day with the 93 especially with hot engine the CHT will go a bit higher that they do with the 100LL . Will see 425F until you either power back or get some higher airspeeds.
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thank you. i heard about what you just mentioned, and good advice on keeping 100LL in the pipeps with sitting. Winter ahead...it'll be sitting some, no doubt. I may just keep 100LL in both tanks at that time. I wonder about putting an agent in the fuel to keep the mogas from varnishing?
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09-18-2012, 12:41 PM
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Join Date: Jan 2006
Location: Belgium
Posts: 645
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98RON Mogas all the time
Hello,
I run 98RON Mogas all the time in my fuel injected 164 HP, OX-320, 1:8,5 compr. (without ethanol/methanol !!). Keeps the spark plugs nice and clean (and I suspect all the rest of the engine as well). In the beginning I did the same as you: fill one tank with 100LL and the other with Mogas for take-off/cruise, but when switching between the two, there was absolutally no difference,........ no change in EGT's, CHT's, oil teomp, or power, at all.
For comparison: Mogas = $ 8,72/Gal, Avgas = $ 14,29/Gal, in Belgium at the moment.
I do have a return line, from the top of the fuel injection throtle body back to the tanks (double stack Andair fuel valve) and a cooling shroud on the fuel pump. So far I have not had any issues, not even while flying in Spain (+40°C.) or at 26.640 ft (-30°C)
Regards, Tonny.
__________________
"Pilottonny"
Tonny Tromp
Lanaken, Belgium (EU)
RV9A, Registration: PH-VAN
ECI-Titan IOX-320 with dual EI, turning a Whirlwind 200RV CS prop.
Sold
Last edited by Pilottonny : 09-18-2012 at 01:47 PM.
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09-18-2012, 01:36 PM
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Join Date: Dec 2006
Location: Portland, OR
Posts: 827
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Quote:
Originally Posted by Pilottonny
For comparison: Mogas = $ 8,72/Gal, Avgas = 14,29/Gal, in Belgium at the moment.
Regards, Tonny.
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OMG.. that is frigg'n scary!!! I'll quit flying at prices like that!!
__________________
Long-EZ built 1985 -> Sold 2007
RV-9A; N539RV First Flight: 7/2010
RV-8A N468DL 40 hr Flight Test Program
Building Log: www.mykitlog.com/n539rv
APRS Tracking: aprs.fi/n539rv
2017 Paid
Last edited by rv9av8tr : 09-18-2012 at 04:05 PM.
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09-18-2012, 04:53 PM
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Join Date: Jul 2012
Location: San Antonio, TX
Posts: 120
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Quote:
Originally Posted by rv9av8tr
OMG.. that is frigg'n scary!!! I'll quit flying at prices like that!!
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That's just an average price for fuel in Europe. I believe it's a little more expensive than the UK, at the moment.
__________________
Roger
A Brit in Texas
RV8 N886LH (Reserved) BuNo 83320
Collecting books/info/tools.
Tail kit arrived! 9/30/2012
Construction started
"The engine's overheating, and so am I! Either we stand down, or blow up! Now which do you want?" Sqn Ldr Canfield.
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09-18-2012, 07:01 PM
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Join Date: Oct 2008
Location: Arlington, WA
Posts: 799
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I fly with straight Premium Unleaded MoGas 100% of the time (checked to be ethanol free of course). The only time I use AvGas is when I'm away from my home airport. This is in an RV-7 / IO 360 with Lightspeed Electronic Ignition / 180 hp / 8.5 : 1 pistons. I always run 50 LOP at cruise. This results in 6.9 gph at 174 mph.
I have had no issues with vapor lock on a running engine. However, I have had vapor lock issues trying to start a hot engine. Running the electric fuel pump while cranking the engine solves this problem within about 10 seconds of cranking.
I use standard aviation plugs / Magneto in the bottom and auto plugs / Lightspeed on the top.
Current Prices in Washington State:
Premium Unleaded ... $4.30 / gal
AvGas ... $6.19 / gal
__________________
_______________________________
Scott "Grumpy" Stewart
RV-7 N957RV (First Flight on Dec 18, 2009 )
RV-14 N144P (Empennage complete, wings almost complete, fuselage almost complete)
#866 on the Van's RV-7 hobbs
#6563 on Van's generic hobbs
Arlington, WA
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09-18-2012, 08:17 PM
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Join Date: Oct 2008
Location: Schaumburg, IL
Posts: 2,053
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I run Mogas as much as possible (90% of the time). No issues to speak of. Like many, I am concerned about stagnation. If I dont plan on flying for a while I will fill up with 100LL.
I have been giving some dual in a Piper Cherokee 140 (o-320 150hp) and flat out refused to fly the plane with LL in it. It simply will not run smoothly on the LL.
__________________
Tony Phillips
N524AP, RV 9 (tail wheel)
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09-20-2012, 10:11 AM
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Join Date: Jan 2006
Location: Belgium
Posts: 645
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That's cheaper than bottled water.......
Quote:
Originally Posted by DakotaHawk
Current Prices in Washington State:
Premium Unleaded ... $4.30 / gal
AvGas ... $6.19 / gal
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I wouldn't have bothered at those prices.......
Regards, Tonny.
__________________
"Pilottonny"
Tonny Tromp
Lanaken, Belgium (EU)
RV9A, Registration: PH-VAN
ECI-Titan IOX-320 with dual EI, turning a Whirlwind 200RV CS prop.
Sold
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09-20-2012, 11:16 AM
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Join Date: Sep 2010
Location: Redlands, Ca.
Posts: 1,458
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Considerable Savings!!!!
....I average about 15 hours monthly of air time, that is 120 gallons of fuel.At a savings of $2 per that adds up, $240 a month or $2,880 per year. ... 
__________________
Allan Nimmo
AntiSplatAero.com
Innovative Aircraft Safety
Products, Tools & ServicesInfo@AntiSplatAero.com Southern California (KREI)
RV-9A / Edge-540 
(909) 824-1020
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