Today's Message Index:
----------------------
1. 12:01 AM - Re: Accessory Case Removal (Hans Teijgeler)
2. 06:10 AM - Re: Looking for cam specs (n801bh@netzero.com)
3. 06:25 AM - Re: Looking for cam specs (flyv35b)
4. 10:27 AM - Re: Looking for cam specs (TeamGrumman@aol.com)
5. 10:31 AM - Re: Looking for cam specs (Archie)
6. 07:10 PM - Re: Looking for cam specs (n801bh@netzero.com)
7. 07:53 PM - Re: Looking for cam specs (Archie)
Message 1
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| Subject: | Accessory Case Removal |
--> Engines-List message posted by: "Hans Teijgeler" <hans@jodel.com>
Joe,
Put it back on the airplane without the bolts and go fly with it. Guaranteed
it will fall apart once you are at 100 feet above the trees :-)
Sorry, not very useful
Do not archive
Hans
> -----Oorspronkelijk bericht-----
> Van: owner-engines-list-server@matronics.com [mailto:owner-engines-list-
> server@matronics.com] Namens Joe Healy
> Verzonden: donderdag 26 mei 2005 1:21
> Aan: engines-list@matronics.com
> Onderwerp: Re: Engines-List: Accessory Case Removal
>
> --> Engines-List message posted by: "Joe Healy" <jhealy@socal.rr.com>
>
> I tried that with a leather mallet (a sledge hammer with a head like a dog
> chew bone). I didn't hit it very hard for fear of cracking the housing. I
> figured I should ask the experts before pounding away like a cave man.
>
> I was wondering if there was a secret kung-fu pressure point to aim for.
> Or
> maybe a Lycoming pry apart tool #2o02587a9sa87.... .
>
> My next attempt would be to try to delaminate the gasket with a single
> edge
> razor blade. Any suggestions?
>
> ----- Original Message -----
> From: "James Ochs" <jochs@froody.org>
> >
> > I don't know the specifics of that engine, but on others I've been able
> > to tap the part gently with a soft mallet and break the gasket loose
> > once the bolts are completely out.
> >
> > James
> >
> > Joe Healy wrote:
> > >I am trying to remove the oil sump and accessory case from a Lycoming
> 0-235.
>
>
>
>
>
Message 2
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| Subject: | Re: Looking for cam specs |
--> Engines-List message posted by: "n801bh@netzero.com" <n801bh@netzero.com>
A fellow builder here in Jackson Hole has an RV-6 with a 0-320 lyc in it. He bought
the motor already assembled and was told it had the 160 HP pistons {74089}
in it. So far the performance is not what is expected, So I have a couple of
questions for you guys. First since you cannot determine the comp ratio by the
leakdown method has anybody done a compression check using the regular way????
If I could get some readings from both a 150 hp and a 160 hp motor I could
tell what pistons are in it without removing the cylinders.. Second this guy
seems to think whoever built up this motor "might" have got the cam timed wrong,
he thinks it is off by one tooth. I can degree the motor without tearing it
down but I need the cam spec for a 150/160 stock cam.... Anyone out there have
those ???? Thanks in advance.
Ben Haas
N801BH
www.haaspowerair.com
Message 3
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| Subject: | Re: Looking for cam specs |
--> Engines-List message posted by: "flyv35b" <flyv35b@ashcreekwireless.com>
I think the variables of trying to definitively determine whether the engine
has 8.5:1 pistons or 7.0:1 preclude using a cranking compression test. But
it would be interesting to see the comparative results. I would think that
a measurement of depth from the spark plug hole to the top of the piston
with it at TDC would be a much more accurate way or determining what pistons
were installed. Place the piston at TDC and screw in the bullet nose plug
used with timing protractors to determine TDC and compare their height.
Actually it may not screw into the threads as they are designed to contact
the piston at something like 45 degrees or so before TDC. But this angle
could be compared between the two engines with the plug fully seated in the
spark plug hole.
There is an easier way (very easy to be exact) of determining correct cam
timing of the Lycoming engine. Set #1 cyl. to TDC on the compression stroke
and take off the #2 rocker cover. Any movement of the crankshaft in EITHER
direction will just start to open either the intake or exhaust valve of #2.
If this doesn't occur then the cam timing is off.
Cliff A&P/IA
----- Original Message -----
From: <n801bh@netzero.com>
Subject: Re: Engines-List: Looking for cam specs
> --> Engines-List message posted by: "n801bh@netzero.com"
> <n801bh@netzero.com>
>
>
> A fellow builder here in Jackson Hole has an RV-6 with a 0-320 lyc in it.
> He bought the motor already assembled and was told it had the 160 HP
> pistons {74089} in it. So far the performance is not what is expected, So
> I have a couple of questions for you guys. First since you cannot
> determine the comp ratio by the leakdown method has anybody done a
> compression check using the regular way???? If I could get some readings
> from both a 150 hp and a 160 hp motor I could tell what pistons are in it
> without removing the cylinders.. Second this guy seems to think whoever
> built up this motor "might" have got the cam timed wrong, he thinks it is
> off by one tooth. I can degree the motor without tearing it down but I
> need the cam spec for a 150/160 stock cam.... Anyone out there have those
> ???? Thanks in advance.
>
>
> Ben Haas
> N801BH
> www.haaspowerair.com
>
>
>
Message 4
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| Subject: | Re: Looking for cam specs |
--> Engines-List message posted by: TeamGrumman@aol.com
Call Ken Tunnell at LyCon and ask him. He might be able to give you some
pointers.
559-651-1070
Message 5
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| Subject: | Re: Looking for cam specs |
--> Engines-List message posted by: "Archie" <archie97@earthlink.net>
The actual compression reading is not necessarily an indicator of
piston ratio.
An aggressive cam profile tends to bleed off some of the pressure
as a trade off for volume, especially at cranking speeds.
Archie
----- Original Message -----
From: <n801bh@netzero.com>
Subject: Re: Engines-List: Looking for cam specs
> --> Engines-List message posted by: "n801bh@netzero.com"
> <n801bh@netzero.com>
>
>
> A fellow builder here in Jackson Hole has an RV-6 with a 0-320 lyc in it.
> He bought the motor already assembled and was told it had the 160 HP
> pistons {74089} in it. So far the performance is not what is expected, So
> I have a couple of questions for you guys. First since you cannot
> determine the comp ratio by the leakdown method has anybody done a
> compression check using the regular way???? If I could get some readings
> from both a 150 hp and a 160 hp motor I could tell what pistons are in it
> without removing the cylinders.. Second this guy seems to think whoever
> built up this motor "might" have got the cam timed wrong, he thinks it is
> off by one tooth. I can degree the motor without tearing it down but I
> need the cam spec for a 150/160 stock cam.... Anyone out there have those
> ???? Thanks in advance.
>
>
> Ben Haas
> N801BH
> www.haaspowerair.com
>
>
>
Message 6
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| Subject: | Re: Looking for cam specs |
--> Engines-List message posted by: "n801bh@netzero.com" <n801bh@netzero.com>
The actual compression reading is not necessarily an indicator of
piston ratio.
An aggressive cam profile tends to bleed off some of the pressure
as a trade off for volume, especially at cranking speeds.
Archie
//////////////////////////////////////////////////////////////
DUH !!!!!!!!!!!!!!!!!!!
I am wanting to compare stock grind to stock grind. I will bet ya more then you
got that 7 to 1 motor will have "LESS" cranking compression then a 8.5 to 1 will
have with both using the same grind cams... Thanks anyway for you insight......
and of course ,,, do not archive
Ben Haas
N801BH
www.haaspowerair.com
Message 7
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| Subject: | Re: Looking for cam specs |
--> Engines-List message posted by: "Archie" <archie97@earthlink.net>
Yes, you are correct in that statement.
I build racing engines for a living, and perhaps went a step
further than was necessary.
Regardless of any hearsay, the dyno speaks truth.
Archie
----- Original Message -----
From: <n801bh@netzero.com>
Subject: Re: Engines-List: Looking for cam specs
> --> Engines-List message posted by: "n801bh@netzero.com"
> <n801bh@netzero.com>
>
>
> The actual compression reading is not necessarily an indicator of
> piston ratio.
> An aggressive cam profile tends to bleed off some of the pressure
> as a trade off for volume, especially at cranking speeds.
> Archie
>
> //////////////////////////////////////////////////////////////
>
> DUH !!!!!!!!!!!!!!!!!!!
>
> I am wanting to compare stock grind to stock grind. I will bet ya more
> then you got that 7 to 1 motor will have "LESS" cranking compression then
> a 8.5 to 1 will have with both using the same grind cams... Thanks anyway
> for you insight......
>
> and of course ,,, do not archive
>
>
> Ben Haas
> N801BH
> www.haaspowerair.com
>
>
>
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