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08-07-2020, 06:33 PM
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Join Date: Jun 2013
Location: Lemoore
Posts: 208
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RV-6A engine swap.
Hi all,
I am looking into swapping out the O-320 H2AD on the RV-6A at some point with something with a little more spank to it as the 6 feels totally gutless compared to my RV-8 O-360. I am curious what the experience is with something like putting on O-360 onto a pre-existing O-320 setup. What (other than the obvious) is entailed? What would have to change? Any particular variants that would work better than others?
Thanks for the input folks!
Charles
__________________
-Wingnut
F-18E/F, Mk.58, CF-5
RV-8 O-360
Last edited by WingnutWick : 08-07-2020 at 06:41 PM.
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08-07-2020, 07:09 PM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,255
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Quote:
Originally Posted by WingnutWick
What would have to change?
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Exhaust, baffling, air box, and lower cowl ( or cut off the induction scoop and install an O-360 one.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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08-07-2020, 09:48 PM
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Join Date: Aug 2019
Location: Altoona,AL
Posts: 49
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When I ordered my engine mount a few weeks back, they told me that the 320 mount was built 2 inches longer for weight and balance. Would that put you nose heavy?
Last edited by Coaltowngarage : 08-07-2020 at 09:51 PM.
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08-08-2020, 09:25 AM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,255
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Quote:
Originally Posted by Coaltowngarage
When I ordered my engine mount a few weeks back, they told me that the 320 mount was built 2 inches longer for weight and balance. Would that put you nose heavy?
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The O-320 Mount is an option only used on the RV-7
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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08-09-2020, 10:56 AM
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Join Date: Aug 2019
Location: Altoona,AL
Posts: 49
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Quote:
Originally Posted by rvbuilder2002
The O-320 Mount is an option only used on the RV-7
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Im confused. I am building a 6. I ordered my mount in June. Thats just what they told me. |
08-09-2020, 02:00 PM
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Join Date: Jan 2005
Location: Cartersville, Georgia KVPC
Posts: 945
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Quote:
Originally Posted by Coaltowngarage
Im confused. I am building a 6. I ordered my mount in June. Thats just what they told me.
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In that case they didn't fully understand that you're building a six...the six was designed for the O-320, and only had one mount. The seven was designed with the O-360 in mind because so many builders were putting 360's in their sixes. Putting a 360 in the six moves the CG forward (not necessarily a bad thing)...putting a 320 on a seven (without using the longer mount) moves the CG back (not necessarily a good thing).
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Moose
VAF #136
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08-09-2020, 02:39 PM
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Join Date: Sep 2018
Location: LSZF
Posts: 593
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as far as I know, depending on your serial, you might have, or not, a -7 engine mount (check for reinforcing gussets)... mine has (as well as pre-punched wing skins and -8 tail).
One thing to consider is, depending of which you have right now, having to replace the engine mount... and the matched landing legs (changed from conical to dynafocal on my -4 and had to replace the lot)...
Gotta say, the 180 ponies on a “light” airframe is a nice combination 
__________________
Life's short... Enjoy
DC aka Dan
http://www.aerofun.ch
RV-6.9 #25685, slider, O-360-A3A (carb/dual Lightspeed II), MTV-12-B, HB-YLL owner & lover
RV-4 #2062 HB-YVZ airframe builder
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08-09-2020, 03:06 PM
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VAF Moderator
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Join Date: Jan 2005
Location: Pine Junction, CO
Posts: 656
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Quote:
Originally Posted by Michael White
In that case they didn't fully understand that you're building a six...the six was designed for the O-320, and only had one mount. The seven was designed with the O-360 in mind because so many builders were putting 360's in their sixes. Putting a 360 in the six moves the CG forward (not necessarily a bad thing)...putting a 320 on a seven (without using the longer mount) moves the CG back (not necessarily a good thing).
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Moose is correct!
__________________
Gary "Seismo" Zilik
Pine Junction, Colorado
RV-6A N99PZ S/N 22993 SOLD
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08-09-2020, 09:55 PM
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Join Date: Aug 2019
Location: Altoona,AL
Posts: 49
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Ok, good to know. I was hoping for the option to possibly upgrade to a 360 some day. Based on what they told me I had figured i would just have to get a new mount and re-do pretty much everything firewall forward including the cowl if that day ever comes.
They ask for the serial number and mine dates to 1991. Something i can quit worrying about now 
Last edited by Coaltowngarage : 08-09-2020 at 09:58 PM.
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