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thane
Joined: 27 Nov 2006
Posts: 56
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 Posted: Wed Aug 27, 2008 8:45 am Post subject: James cowl with a standard IO-540 |
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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!!
[quote] 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.
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Working on finish kit: I hate fiberglass!! |
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thane
Joined: 27 Nov 2006
Posts: 56
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| Posted: Sat Aug 30, 2008 5:10 pm Post subject: James cowl with a standard IO-540 |
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Today N321BY flew for the first time out of 28A, Goose creek.
3.5 years of work lots of sweat and a little blood, and is was a near
perfect flight. My air box worked very well and I will try to take some pics
on my next cowl removal.
I cant say enough about how smooth and powerful the BPA engine is.
I am very pleased with how it flew today.
As said many time by others, build on and you to will soon enjoy this
wonderful airplane.
Regards,
Thane States
#40337; finally in the air!!
[quote] 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.
>
> --
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Working on finish kit: I hate fiberglass!! |
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AV8ORJWC
Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"
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| Posted: Sat Aug 30, 2008 5:47 pm Post subject: James cowl with a standard IO-540 |
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I have never heard a negative on the decision by any builder to use BPA.
They are a class act. I am interested pictures of both your airbox and
cowl decisions. Gary Foster was going to be the first with BPA and
James but I have never heard a word. My impression is that most
builders went with Aerosport and the stock Green or Pink Vans creations.
Congrats.
John Cox
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ncol(at)xtra.co.nz
Guest
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| Posted: Sat Aug 30, 2008 7:26 pm Post subject: James cowl with a standard IO-540 |
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Hi Guys
Just done a couple of quick tests this morning.
By way of background we have the IO540 from BPA dynoed at 282hp. A
wonderfully smooth combination.
MT 3 blade prop.
James cowl with plenum.
The plenum needed a fair bit of work.
The cold air induction & filter was definitely time consuming & not
straight forward. But we have a K & N filter, the same as Gary's, and a
top flap for alternate air. A pair of working mags.
1/2 fuel, 2 adults, 3 children+ clutter.
Full throttle.
8500ft,
7410 DA
155 KIAS
172 TAS
22.7MAP
2340 RPM
2 runs, both cross wind, averages.
PS - we fly off a grass 550m strip most of the time, with absolutely no
probs, except when very wet. The landing lights need to be a pair,
brighter, and centre mounted (somehow) - maybe on the cowl under the
air intake?
PPS - it was very dark when we landed late last week under heavy
overcast & rain.
Neil
ZK-RVT
On 31 Aug 2008, at 13:45, John Cox wrote:
| Quote: |
I have never heard a negative on the decision by any builder to use
BPA.
They are a class act. I am interested pictures of both your airbox
and
cowl decisions. Gary Foster was going to be the first with BPA and
James but I have never heard a word. My impression is that most
builders went with Aerosport and the stock Green or Pink Vans
creations.
Congrats.
John Cox
|
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