I also have the BPA cold air and James cowl. I am ready to fly just waiting for
this southern WX to get better. I will say this; the James cowl will work
with the cold air of BPA, with no intake mods to the cowl. I made my own airbox
using a monster cone K-&-N filter. It has taken more than 20 hrs. of fab work,
but it just fits between the cowl, and I am able to put the cowl on and off
by myself.
Once I fly it and confirm its performance I would be happy to post some pics for
those interested.
Right now the bird is all cowled up and ready to fly, after 3.5 years of building.
I am Jonesing bad right now.
Anyway just my 2 cents. My whole goal was to let that big motor get lots of cool
air and still not have to cut up that nice cowl intake.
Thane States
#40337 Ready to fly!!
> The only difference in the 2 systems that Robin
> mentions is how the intake pipes mount to the plenum
> chamber. On Deems and a few others (Michael), the
> intake pipes connect with a 72711 o-ring. With the
> revision A plenum, we have swedged a 1-5/8 pipe to
> the plenum and secure the intake pipe with a hose
> and 2 clamps. This makes for a better connection and
> gives a small increase in HP. However, it does not
> change the location of the plenum or the servo.
>
>
>
> Allen Barrett
>
> BPE, Inc.
>
>
>
> -----Original Message-----
> From: owner-rv10-list-server@matronics.com
> [mailto:owner-rv10-list-server@matronics.com] On
> Behalf Of Robin Marks
> Sent: Tuesday, August 26, 2008 2:50 PM
> To: rv10-list@matronics.com
> Subject: RE: James cowl with a standard
> IO-540
>
>
>
> Danger Will Robinson, Danger Will Robinson!
>
>
>
> Michael it would be great if life were that
> simple... For those that don't know I have:
>
>
>
> . BPE IO-540 w/ Cold Induction
>
> . James Plenum Installed
>
> . James Cowl Installed
>
>
>
> . Airworthiness certificate in hand
>
> . First flight ~2 weeks
>
>
>
> Sheril & I spoke extensively with Rod (amazing
> builder) before & during OSH this year and there is
> NO good news. There is absolutely no way that Rod's
> unit will work with the James cowl and the BPE Cold
> Induction. The space between the standard "Smile"
> air inlet and the injector body is just too short.
> The angles are all wrong and the spun canister
> conflicts in a major way with components on the
> underside of the engine and the lower cowl. A major
> modification to the James cowl much like Deems did
> would be required. Our goal was to leave the "Smile"
> air inlet shape unaltered.
>
>
>
> Also of note there are a couple of different Forward
> Facing Cold Air Induction systems available from
> BPE. I happen to have the latest design which is
> different from Deems. Additionally there are
> different Injector Body sizes. Mine is 3.75" known
> as the Model 300 while Deems has the Model 200 which
> is 3.25". (sizes by memory). James did not know
> about the different Cold Induction systems or the
> different size Injector Body units. His response was
> "REALLY? Can you measure again?". One additional
> note is that both James have a bit of 2 week-itus.
> They have been waiting for a customer to develop a
> system and then send them a copy to use as a basis
> for designing their system. IMHO you have a shaky
> business model if you require your customers to be
> responsible for your R&D.
>
>
>
> The largest challenge with the James cowl
> installation is the air box. We believe we have come
> up with a solution that is simple and straight
> forward. Our design is not 100% complete and I don't
> have photos (yet) of the transition from the
> Injector body to the Air Filter but I should have
> them soon. Attached are photos of the forward
> portion of the air box / filter mounted to the cowl
> very close to the air inlet. The angle of the filter
> allows us to drop the lower cowl away from the
> portion of the air box attached to the injector
> body. Note that the injector body is less than 3"
> away from the filter. If anyone saw the Bower unit
> there is no way it would come close to fitting in
> this space.
>
>
>
> General notes on the James Cowl. Deems has a good
> write up on general fit however we seemed to have
> different issues when fitting our cowl. There was
> absolutely no way to get the lower cowl to fit as
> is. We could get the front & right to fit but not
> the left. Or the left & front to fit but not the
> right. We fussed with it for 2 days with no luck.
> When all else fails pull out the saw! We split the
> lower cowl on the centerline of the cowl starting
> from the exhaust outlet (nose wheel leg slot) and
> ending up 5-6 inches from the scoop. This large
> split allowed us to easily fit all sides and give
> the cowl enough "relief" to attach w/o any tension.
> 2 hours total time once we chose this path. All that
> was left to do was patch the "V" void and the cowl
> fit perfectly. (Cowl Filter 3.jpg shows the lower
> cowl split patch)
>
>
>
> I am unable to comment on the standard cowl with the
> any combination mentioned.
>
>
>
> Robin
>
> RV-4 Sold
>
> RV-6A 440 Hours
>
> RV-10 Soon
>
> RV-8A Purchased partially built
>
>
>
> (Michael Sausen)" <rvbuilder@sausen.net>
>
>
>
> One thing I would throw in there for the
> non-fiberglass savvy is that both Gary and Deems
> have fairly extensive experience with glass given
> they both previously have built glass aircraft.
> Either cowl will require some modifications. The
> good news is if you go with a James cowl, Barrett
> cold air, and the Rod Bower FAB, Rod has a mold
> taken from the work that Deems did to his James cowl
> and the induction so you can get a molded part to
> minimize your rework. Here is Rod's link:
>
>
>
> http://www.ramairforhomebuilts.com/ramair.html
>
>
>
> Michael
>
>
>
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