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04-03-2009, 02:44 PM
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Join Date: Jan 2005
Location: Ottawa, Canada
Posts: 2,357
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I used the upper cowl ramps as part of a female mold to make fibreglas diffusers that attach to the aft edge of the upper cowling. Three screws attach each diffuser to the upper cowling. A piece of ATV inner tube goes between the aft edge of the diffuser and the front edge of the plenum. This makes a flexible and apparently relatively airtight seal between the cowling and plenum. So far I've had way more cooling than I needed, but I haven't yet tested in worst case hot day conditions.
Pictures and description here.
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04-11-2009, 05:07 PM
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Join Date: Dec 2005
Location: Windsor Colorado
Posts: 33
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Plenum
I installed a fiberglass plenum made by Russ Kamtz of KFNL. (Step up Aviation) The plenum sets in to the Vans baffle setup. You set the plenum into position, mark the inside edges and trim the baffles to fit. Reset the plenum, mark and drill holes for the nutplates thru the plenum and baffles. Install the nutplates on the plenum. Russ uses a pair of fiberglass ramps to feed and seal the inlets. The fit and install took about 4 hours. I am pleased with performance and fit ! If you are interested in an upgrade I can put you in touch with Russ
Les
__________________
Les Preston
RV-7 flying
Rocky Mountain High !
300 hours of pure pleasure !
RV7 sold
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04-12-2009, 05:11 PM
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Join Date: Jan 2008
Location: MERRITT ISLAND, FL
Posts: 360
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Hey Les, got more...
Quote:
Originally Posted by Turbowind
I installed a fiberglass plenum made by Russ Kamtz of KFNL. (Step up Aviation) The plenum sets in to the Vans baffle setup. You set the plenum into position, mark the inside edges and trim the baffles to fit. Reset the plenum, mark and drill holes for the nutplates thru the plenum and baffles. Install the nutplates on the plenum. Russ uses a pair of fiberglass ramps to feed and seal the inlets. The fit and install took about 4 hours. I am pleased with performance and fit ! If you are interested in an upgrade I can put you in touch with Russ
Les
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Les,
Do you have pix of your installation? Which engine?
thx,
Don
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Don Stiver
RV8 "Little Pill" N6371S, Merritt Island, Fl.
BPE IO-390, Dual P-mag, MT 3-blade, AFP system
Steen Skybolt: Sold
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04-12-2009, 10:02 PM
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Join Date: Dec 2005
Location: Windsor Colorado
Posts: 33
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Plenum
The engine is an I0-360 (180hp)........I will post a picture on monday.
Les 
__________________
Les Preston
RV-7 flying
Rocky Mountain High !
300 hours of pure pleasure !
RV7 sold
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04-13-2009, 03:03 PM
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Join Date: Dec 2005
Location: Windsor Colorado
Posts: 33
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Plenum pictures
Don....email me at Les and Peggy at aol.com and I'll email you the pictures, I have'nt figured out how to post the pictures on this site.
Les
__________________
Les Preston
RV-7 flying
Rocky Mountain High !
300 hours of pure pleasure !
RV7 sold
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03-13-2010, 06:14 PM
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Join Date: Aug 2008
Location: Sun city, Ca.
Posts: 255
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Here's mine
Just finished it yesterday. Overall really happy how it turned out. It could use some more block sanding but the matt finish really hides the lows. I may still sand when painting begins but then again I look forward to flying this year.

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03-13-2010, 08:07 PM
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Join Date: Jan 2005
Location: MN
Posts: 2,269
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Very Nice!
Quote:
Originally Posted by Cfrisella
Just finished it yesterday. Overall really happy how it turned out. It could use some more block sanding but the matt finish really hides the lows. I may still sand when painting begins but then again I look forward to flying this year.

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Cheers,
Pete
Amateur Plane - RV-9A N789PH - 2350+ Hrs
Amateur Radio - KD0CVN
Doggies Delivered - 25+
St. Paul, MN
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03-13-2010, 09:20 PM
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Join Date: Jun 2005
Location: Cedar Park, TX
Posts: 3,156
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Way too many fasteners. I'm going to do better next time.
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Scott Card
CQ Headset by Card Machine Works
CMW E-Lift
RV-9A N4822C flying 2200+hrs. / Cedar Park, TX
RV8 Building - fuselage / showplanes canopy (Done!)
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03-14-2010, 07:57 AM
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Join Date: Aug 2007
Location: Shallotte NC
Posts: 594
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here's mine
All metal, vans baffles with a lid. Works just perfect, nice even cylinder temps after baffle and inlet dam adjustments. Stabilizes the oil cooler mounting, and has way too many fasteners to deal with. No top cowl puffing in flight. 10 kts....
Regards, Chris
[IMG]http://i44.tinypic.com/zu5bgn.jpg
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Chris Schmitt
Shallotte, NC
RV9A 90970 N614RV
Sold to nice folks in Texas and badly missed.
RV9 in progress
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03-14-2010, 08:06 AM
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Join Date: Aug 2007
Location: Shallotte NC
Posts: 594
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Opps...Here is that image
Lets try again....
Here is my plenum, Regards, Chris
[IMG]  [/IMG]
__________________
Chris Schmitt
Shallotte, NC
RV9A 90970 N614RV
Sold to nice folks in Texas and badly missed.
RV9 in progress
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