Author: "MaxHegler" <MaxHegler@...> Time: Fri Dec 21, 2001 7:16 pm PST Link
I have been watching engine comments for a while. I have not decided on which way to go. I am also considering alternative engines, since I have some time before reaching the point of engine purchase. Some considerations between the O-360 (180 hp) and the IO-360 (200 hp) are initial cost and weight. A friend added a tuned exhaust to his O-360 and claims an additional 23 hp. His rate of climb is noticeably increased. The 10:1 pistons add how much? If the O-360 can be made to produce more than 200 hp, would it work better than the IO-360? Just some thoughts...
Max
----- Original Message -----
From: Gary A. Sobek
To: SoCAL-RVlist@yahoogroups.com
Sent: Friday, December 21, 2001 8:30 PM
Subject: Re: [SoCAL-RVlist] Any 0-360's available?
Standard compression in the O-320 160 HP and O-360 180 HP is 8.5:1.
You can purchase the 10:1 pistons from: http://www.lycon.com/nfs.htm
There are at least 3 RVs that I know of in SoCAL that are running 10:1. Know
of no problems in SoCAL.
Some of the best engine work can be done locally.
http://www.performanceaeroengines.com/ This is my shop of choice. I take all
my engine work there that I do not do myself. In the past, Ron has been able
to get engine cores and build a custom engine without core. I trust Ron enough
to give him a blank check to do work that needs done.
A lot of guys will go to: http://www.lycon.com/
The only difference that you will notice with the 10:1 over the 8.5:1 is the
rate of climb. The 10:1 engine will use a little more oil. 8-10 hours per
quart instead of 12-15 hours per quart.
Part of the trick to get more horsepower is to turn more than 2,700 RPM. The
72" props that we use need to stay below 2,800 to keep tip speed below .7999
Mach.
Gary
"Daniel Masys, M.D." wrote:
> At 01:01 PM 12/21/2001 -0500, you wrote:
>
> >CA
> >O-360-A1A. FACTORY NEW ENGINE, w/port, polish, flow bench of cylinders and
> >10:1 compression pistons all by Ly-Con (Visalia, CA). Slick magnetos,
> >lightweight starter, carburetor, prop governor adapter. Warranty. $22,900.
> >858, 755-6117. d3
>
> For those of us just beginning to learn about the technical details of
> Lycosaurs, are 10:1 pistons higher compression than the standard for an
> A1A? And what are the horsepower and reliability implications?
>
> Inquiring minds...
>
> -Dan Masys
> -7A tanks
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[Non-text portions of this message have been removed]
Author: GTCJ68@... Time: Sat Dec 22, 2001 12:27 am PST Link
Max,
A word to the wise about extracting more horsepower from an engine than it
was orginally designed to deliver, and this comes from Bart LaLonde during a
discussion I had with him on this topic: To paraphrase, as horsepower and
performance increases, reliability and longevity decreases. Not to say that
it can't and shouldn't be accomplished, it's just that, as always,
compromises must be made. Nothing's for free (and we don't build planes
without knowing that, do we?).
I'm sure we'll all we interested to see what this stirs up. I love it.
Happy Holidays!
Mitch Lock
[Non-text portions of this message have been removed]
Author: "MaxHegler" <MaxHegler@...> Time: Sat Dec 22, 2001 6:03 am PST Link
Mitch,
Thanks for the input! I have been thinking about the basics of the
Lycoming, for example, it is not that well balanced, it does not have
electronic ignition, the exhaust isn't scavenged efficiently, the intake
doesn't optimize airflow, among other things. Since an engine is nothing
more than an airpump, and normally produces power in relation to how much
air goes through it at a certain rpm, wouldn't it produce more power if it
were more efficient? I am currently thinking about the XP-360 (I believe it
is well balanced) with fuel injection, dual electronic ignition, and a well
designed exhaust system. I think the reduced weight would give performance
near if not equal to the IO-360 angle valve, partly because of less
installed weight. I am definitely not an expert on aircraft engines, and I
don't want to reduce reliability (no increased rpm), just efficiency.
Take Care,
Max
----- Original Message -----
From: <GTCJ68@a...>
To: <RV7and7A@yahoogroups.com>
Sent: Saturday, December 22, 2001 3:27 AM
Subject: Re: [RV7and7A] Re: [SoCAL-RVlist] Any 0-360's available?
> Max,
>
> A word to the wise about extracting more horsepower from an engine than it
> was orginally designed to deliver, and this comes from Bart LaLonde during
a
> discussion I had with him on this topic: To paraphrase, as horsepower and
> performance increases, reliability and longevity decreases. Not to say
that
> it can't and shouldn't be accomplished, it's just that, as always,
> compromises must be made. Nothing's for free (and we don't build planes
> without knowing that, do we?).
>
> I'm sure we'll all we interested to see what this stirs up. I love it.
>
> Happy Holidays!
>
> Mitch Lock
> [Non-text portions of this message have been removed]
> Van's Air Force - World Wide Wing
> www.vansaircraft.net
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