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Date: Wed, 29 Jun 2005 08:44:59 -0500
Subject: Re: [FlyRotary] Re: P Ports working on dyno
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From: Jerry Hey <jerryhey@earthlink.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
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On Wednesday, June 29, 2005, at 08:04 AM, Russell Duffy wrote:

> =A0=46rom Paul Lamar's list it has just been posted that the p port =
engine
> on the dyno at MazdaTrix with remote fuel injectors is now running =
very
> well, developing 220 hp (this sounds like a 6000 rpm number to me but
> the post did not say the rpm) and it is idling smoothly at 1000 rpm.
>
> =A0
> Hi Jerry,
> =A0
> 220 at 6000 would be impressive, assuming there are no big negatives=20=

> we don't know about.=A0 Did they specifically say they checked the=20
> throttle response?=A0 Do you know what ECU they're using?=A0 It could =
be=20
> that they can tune out some of the the remote injector problems. Any=20=

> idea what they're using for a muffler?=A0
> =A0
> For the record, who's actually conducting the dyno runs, and who's=20
> reporting the results?=A0=A0I would be more skeptical of the reports, =
if=20
> they're only coming from PL, as he's well known for only telling us=20
> what he wants us to hear.=A0
> =A0
> Don't get me wrong, I AM interested, just skeptical.=A0 I won't do=20
> anything significant with the RV-3 engine for a while, so hopefully,=20=

> more details will be available.=A0 Unfortunately, I don't think it's=20=

> ever been a problem getting good numbers from a PP engine on a dyno,=20=

> but the problems occur in the real world, from fuel mileage, noise,=20
> and "drivability" issues (which could be meaningless to us, or not).=A0
> =A0
> Cheers,
> Rusty (250 HP would be nice)

Rusty,  the big deal of my post  was that remote injectors are=20
functioning very well.

  The engine is idling smoothly at 1000 rpm.   The ECU is Tracy's.   The=20=

dyno runs are being done at MazdaTrix and Paul is reporting the results.

  Of course we have known all along that the p ports would work just=20
fine and that they would idle o.k.  They have been doing so in cars=20
forever.  Lynn has stated his experience to the same effect.  =20
PowerSport engines idle fine.  So the only issue was the remote=20
injectors which has turned out apparently to be a non issue as well.=20
They work fine although no mention was made about throttle response. =20
The exhaust system as seen in photos is part of the dyno set up and I=20
don't have the details.  It does suppress the sound to tolerable=20
levels.  Today or tomorrow they will be testing the cool tube exhaust=20
system that I built.  It may cost some hp. we shall see.

I don't think you have any real numbers to suggest the p port will have=20=

poor milage if you take into consideration the power being produced. =20
If  you want to burn less fuel, throttle back to  200 hp.

Back to the remote fuel injectors.  Cool side injection  is certainly=20
possible in p ports and in my opinion should be a design goal for=20
safety reasons.  It may not work in side ports due to  lower velocities=20=

in the runners.

Time to give Paul Lamar credit for his huge effort in  developing the p=20=

port to this stage.  He has been very open about reporting difficulties=20=

along the way.     Jerry
>
>
>

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On Wednesday, June 29, 2005, at 08:04 AM, Russell Duffy wrote:


<excerpt><smaller>=A0=46rom Paul Lamar's list it has just been posted =
that
the p port engine

on the dyno at MazdaTrix with remote fuel injectors is now running very

well, developing 220 hp (this sounds like a 6000 rpm number to me but

the post did not say the rpm) and it is idling smoothly at 1000 =
rpm.</smaller>


=A0

<fontfamily><param>Arial</param><color><param>FFFF,0000,0000</param>Hi
Jerry,</color></fontfamily>

=A0

<fontfamily><param>Arial</param><color><param>FFFF,0000,0000</param>220
at 6000 would be impressive, assuming there are no big negatives we
don't know about.=A0 Did they specifically say they checked the throttle
response?=A0 Do you know what ECU they're using?=A0 It could be that =
they
can tune out some of the the remote injector problems. Any idea what
they're using for a muffler?=A0</color></fontfamily>

=A0

<fontfamily><param>Arial</param><color><param>FFFF,0000,0000</param>For
the record, who's actually conducting the dyno runs, and who's
reporting the results?=A0=A0I would be more skeptical of the reports, if
they're only coming from PL, as he's well known for only telling us
what he wants us to hear.=A0</color></fontfamily>

=A0

=
<fontfamily><param>Arial</param><color><param>FFFF,0000,0000</param>Don't
get me wrong, I AM interested, just skeptical.=A0 I won't do anything
significant with the RV-3 engine for a while, so hopefully, more
details will be available.=A0 Unfortunately, I don't think it's ever
been a problem getting good numbers from a PP engine on a dyno, but
the problems occur in the real world, from fuel mileage, noise, and
"drivability" issues (which could be meaningless to us, or =
not).=A0</color></fontfamily>

=A0

=
<fontfamily><param>Arial</param><color><param>FFFF,0000,0000</param>Cheers=
,</color></fontfamily>

=
<fontfamily><param>Arial</param><color><param>FFFF,0000,0000</param>Rusty
(250 HP would be nice)</color></fontfamily>

</excerpt>

Rusty,  the big deal of my post  was that remote injectors are
functioning very well.=20


 The engine is idling smoothly at 1000 rpm.   The ECU is Tracy's. =20
The dyno runs are being done at MazdaTrix and Paul is reporting the
results.=20


 Of course we have known all along that the p ports would work just
fine and that they would idle o.k.  They have been doing so in cars
forever.  Lynn has stated his experience to the same effect. =20
PowerSport engines idle fine.  So the only issue was the remote
injectors which has turned out apparently to be a non issue as well.
They work fine although no mention was made about throttle response.=20
The exhaust system as seen in photos is part of the dyno set up and I
don't have the details.  It does suppress the sound to tolerable
levels.  Today or tomorrow they will be testing the cool tube exhaust
system that I built.  It may cost some hp. we shall see. =20


I don't think you have any real numbers to suggest the p port will
have poor milage if you take into consideration the power being
produced.  If  you want to burn less fuel, throttle back to  200 hp.=20


Back to the remote fuel injectors.  Cool side injection  is certainly
possible in p ports and in my opinion should be a design goal for
safety reasons.  It may not work in side ports due to  lower
velocities in the runners.  =20


Time to give Paul Lamar credit for his huge effort in  developing the
p port to this stage.  He has been very open about reporting
difficulties along the way.     Jerry

<excerpt>


</excerpt>=

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