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09-06-2016, 07:26 AM
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Join Date: Aug 2012
Location: Lufkin Tx
Posts: 689
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Horizontal or vertical ?
I'm having an IO360 being built for a new project and need to decide on horizontal or vertical induction? What's the best setup for fitting the cowl, Vetterman exhaust, ect.? I'm not an engine expert so this is new territory for me. This -4 will be setup for extensive aerobatic flight.
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Arlie Conner (A&P)
RV-4 (N124TT) Sold
RV-8 (N269CP) Sold
RV-4 (N684ML) completed 3-17-19
KOCH Nacogdoches
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09-06-2016, 10:12 AM
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Join Date: Nov 2014
Location: Richmond Hill, GA (KLHW)
Posts: 2,183
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A 3rd option
My -7A has vertical induction but I decided to mount the FI server horizontally using some parts I purchased from Airflow Performance. Very happy with the setup and should clear the lower cowling once the bottom fuel inlet fitting is replaced by Don with a banjo fitting.
If I had to do it again, I would go with the Vetterman trombone exhaust to avoid having to install heat shields.
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Ray
RV-7A - Slider - N495KL - First flt 27 Jan 17
O-360-A4M w/ AFP FM-150 FI, Dual PMags, Vetterman Trombone Exh, SkyTech starter, BandC Alt (PP failed after 226 hrs)
Catto 3 blade NLE, FlightLines Interior, James cowl, plenum & intake, Anti-Splat -14 seat mod and nose gear support
All lines by TSFlightLines (aka Hoser)
Last edited by Raymo : 09-07-2016 at 05:20 AM.
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09-06-2016, 02:48 PM
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Join Date: Jul 2009
Location: Wilsonville, OR
Posts: 453
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I went with the horizontal induction for my -7 mostly because I heard that it is a lot of work to build the vertical airbox. I also didn't like the scoop on the cowl. No regrets.
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Trevor Conroy CFII, MEI
Airbus Pilot
N781TD
RV-7
First Flight - April 12, 2015
Construction Log
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09-06-2016, 04:00 PM
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Join Date: Nov 2005
Location: Asheville, NC
Posts: 2,690
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Arlie,
I hope some RV4 folks post here to give you direct feedback.
As an RV7 builder with horizontal sump, I know those parts.
It is not clear to me that the horizontal sump and injector plus related intake system will fit the RV4 cowl without some significant custom work. I imagine it has been done though. Maybe one of those guys will post.
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Bill Pendergrass
ME/AE '82
RV-7A: Flying since April 15, 2012. 850 hrs
YIO-360-M1B, mags, CS, GRT EX and WS H1s & A/P, Navworx
Unpainted, polished....kinda'... Eyeballin' vinyl really hard.
Yeah. The boss got a Silhouette Cameo 4 Xmas 2019.
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09-06-2016, 04:29 PM
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Join Date: Dec 2014
Location: Melbourne beach, fl
Posts: 190
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What about using a Rotec TBI? You know that will fit and you get full inverted options!
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09-06-2016, 04:47 PM
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Join Date: Feb 2005
Location: Northwestern USA
Posts: 1,209
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Having done the horizontal induction build on my 7, I think you would be looking at a whole lot of custom cowling fabrication to make it work on the 4. It would be cool though!
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Matt Burch
RV-7 (last 90%)
http://www.rv7blog.com
VAF #836
Any opinions expressed in this message are my own and not those of my employer.
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09-06-2016, 05:22 PM
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Join Date: Jan 2007
Location: Battleground
Posts: 4,348
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Piece of cake IF you don't use an air box! I know of one 4 that has flown for many years and hundreds of ours with direct ram air into the injector. No air box. No filter. I like it a lot and absolutely would consider it. There are pros and cons. The TBI's want/need an air box but perhaps their small size would leave space for one.
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Smart People do Stupid things all the time. I know, I've seen me do'em.
RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
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09-08-2016, 04:03 AM
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Join Date: Nov 2005
Location: Asheville, NC
Posts: 2,690
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Quote:
Originally Posted by Jstov
What about using a Rotec TBI? You know that will fit and you get full inverted options!
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Why go to the trouble of putting in that unit when a vertical RSA-5 will fit just fine in the standard carburetor position?
__________________
Bill Pendergrass
ME/AE '82
RV-7A: Flying since April 15, 2012. 850 hrs
YIO-360-M1B, mags, CS, GRT EX and WS H1s & A/P, Navworx
Unpainted, polished....kinda'... Eyeballin' vinyl really hard.
Yeah. The boss got a Silhouette Cameo 4 Xmas 2019.
Last edited by rzbill : 09-08-2016 at 04:54 AM.
Reason: Too rude in original configuration.
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09-08-2016, 07:01 AM
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Join Date: Aug 2012
Location: Lufkin Tx
Posts: 689
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Im going with vertical induction. Did a little more research and that would be easier on the -4. Also going to use the Vans FAB.
__________________
Arlie Conner (A&P)
RV-4 (N124TT) Sold
RV-8 (N269CP) Sold
RV-4 (N684ML) completed 3-17-19
KOCH Nacogdoches
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