Today's Message Index:
----------------------
1. 03:20 AM - Re: compression test and mag timing equipment (Michael Kraus)
2. 07:12 AM - Re: compression test and mag timing equipment (Kelly McMullen)
3. 07:57 AM - Re: compression test and mag timing equipment (Greg Young)
4. 08:02 AM - Re: compression test and mag timing equipment (Michael Kraus)
5. 08:14 AM - Re: compression test and mag timing equipment (thomas sargent)
Message 1
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| Subject: | Re: compression test and mag timing equipment |
You Typically need one of these too!
http://www.aircraftspruce.com/catalog/topages/timing_ind.php
Sent from my iPhone
On Jun 21, 2011, at 11:32 PM, Kelly McMullen <kellym@aviating.com> wrote:
>
> You can follow the old advice and use the smaller orifice(.040) compression tester
for engines less than 1000 cu. in.
> http://www.aircraftspruce.com/catalog/topages/differentialcylindertester.php
> A few years back they started suggesting the larger orifice(.060) for engines 5" and larger bore. No one I know follows that advice. It will show higher compressions which really isn't what you want. Any buzz box magneto timer will work. This $43 unit is about as cheap as they come: *http://www.aircraftspruce.com/catalog/topages/synchronizer.php*
> Kelly
> A&P/IA
> EAA Tech Counselor
>
>
> On 6/21/2011 8:13 PM, thomas sargent wrote:
>> I am getting ready to do the annual on my 6A and trying to figure out which
cyl. compression tester to get. I have an IO-260-B2B. It has a 5.125" bore.
I'm seeing conflicting information about the orifice size needed t\for such an
engine. Is it 0.040" or 0.060"
>>
>> Also, I have but 1 magneto (Lightspeed Ignition on the right). Which magneto
timer should I get? Do I need anything else to time the left mag?
>>
>> Thanks,
>>
>> --
>> Tom Sargent, N811WT , RV-6A
>> *
>>
>>
>> *
>
>
>
>
Message 2
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| Subject: | Re: compression test and mag timing equipment |
Waste of money, IMHO. If you want accurate timing, get/borrow a digital
level to determine exact prop position. Once you find the correct mark
on your flywheel, it isn't hard to line it up with the case halves, IF
you have marks on the engine side of the flywheel. If you only have
marks on the front side, you have to use the mark on the starter motor.
If you have questions, find an A&P to show you correct positioning...it
isn't rocket science. The flower pot isn't so useful because it needs to
be positioned on the spinner such that its surface is perpendicular with
the ground...hard to do with a tailwheel aircraft.
On 6/22/2011 3:15 AM, Michael Kraus wrote:
> --> RV-List message posted by: Michael Kraus<n223rv@wolflakeairport.net>
>
> You Typically need one of these too!
>
> http://www.aircraftspruce.com/catalog/topages/timing_ind.php
>
> Sent from my iPhone
>
> On Jun 21, 2011, at 11:32 PM, Kelly McMullen<kellym@aviating.com> wrote:
>
>> --> RV-List message posted by: Kelly McMullen<kellym@aviating.com>
>>
>> You can follow the old advice and use the smaller orifice(.040) compression
tester for engines less than 1000 cu. in.
>> http://www.aircraftspruce.com/catalog/topages/differentialcylindertester.php
>> A few years back they started suggesting the larger orifice(.060) for engines 5" and larger bore. No one I know follows that advice. It will show higher compressions which really isn't what you want. Any buzz box magneto timer will work. This $43 unit is about as cheap as they come: *http://www.aircraftspruce.com/catalog/topages/synchronizer.php*
>> Kelly
>> A&P/IA
>> EAA Tech Counselor
>>
>>
>> On 6/21/2011 8:13 PM, thomas sargent wrote:
>>> I am getting ready to do the annual on my 6A and trying to figure out which
cyl. compression tester to get. I have an IO-260-B2B. It has a 5.125" bore.
I'm seeing conflicting information about the orifice size needed t\for such
an engine. Is it 0.040" or 0.060"
>>>
>>> Also, I have but 1 magneto (Lightspeed Ignition on the right). Which magneto
timer should I get? Do I need anything else to time the left mag?
>>>
>>> Thanks,
>>>
>>> --
>>> Tom Sargent, N811WT , RV-6A
>>> *
>>>
>>>
>>> *
>>
>>
>>
>
>
Message 3
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| Subject: | compression test and mag timing equipment |
The flower pot is not needed on Lycomings that have a timing mark on the
flywheel. Even my GO-480 had a timing mark so perhaps all Lycomings have
one somewhere. Not so on Continentals. I had buy one for the IO-550 in my
Navion but don't need it for the RV.
Greg Young
-----Original Message-----
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com] On Behalf Of Michael Kraus
Sent: Wednesday, June 22, 2011 5:15 AM
Subject: Re: RV-List: compression test and mag timing equipment
You Typically need one of these too!
http://www.aircraftspruce.com/catalog/topages/timing_ind.php
Sent from my iPhone
On Jun 21, 2011, at 11:32 PM, Kelly McMullen <kellym@aviating.com> wrote:
Message 4
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| Subject: | Re: compression test and mag timing equipment |
Interesting, used it successfully for 9 years with no problems, on my taildragger
RV-4...... Inexpensive and worked great for me. And it has worked great on
my RV-10 for 1 year.
Sent from my iPhone
On Jun 22, 2011, at 10:08 AM, Kelly McMullen <kellym@aviating.com> wrote:
>
> Waste of money, IMHO. If you want accurate timing, get/borrow a digital level
to determine exact prop position. Once you find the correct mark on your flywheel,
it isn't hard to line it up with the case halves, IF you have marks on the
engine side of the flywheel. If you only have marks on the front side, you
have to use the mark on the starter motor. If you have questions, find an A&P
to show you correct positioning...it isn't rocket science. The flower pot isn't
so useful because it needs to be positioned on the spinner such that its surface
is perpendicular with the ground...hard to do with a tailwheel aircraft.
>
>
> On 6/22/2011 3:15 AM, Michael Kraus wrote:
>> --> RV-List message posted by: Michael Kraus<n223rv@wolflakeairport.net>
>>
>> You Typically need one of these too!
>>
>> http://www.aircraftspruce.com/catalog/topages/timing_ind.php
>>
>> Sent from my iPhone
>>
>> On Jun 21, 2011, at 11:32 PM, Kelly McMullen<kellym@aviating.com> wrote:
>>
>>> --> RV-List message posted by: Kelly McMullen<kellym@aviating.com>
>>>
>>> You can follow the old advice and use the smaller orifice(.040) compression
tester for engines less than 1000 cu. in.
>>> http://www.aircraftspruce.com/catalog/topages/differentialcylindertester.php
>>> A few years back they started suggesting the larger orifice(.060) for engines 5" and larger bore. No one I know follows that advice. It will show higher compressions which really isn't what you want. Any buzz box magneto timer will work. This $43 unit is about as cheap as they come: *http://www.aircraftspruce.com/catalog/topages/synchronizer.php*
>>> Kelly
>>> A&P/IA
>>> EAA Tech Counselor
>>>
>>>
>>> On 6/21/2011 8:13 PM, thomas sargent wrote:
>>>> I am getting ready to do the annual on my 6A and trying to figure out which
cyl. compression tester to get. I have an IO-260-B2B. It has a 5.125" bore.
I'm seeing conflicting information about the orifice size needed t\for such
an engine. Is it 0.040" or 0.060"
>>>>
>>>> Also, I have but 1 magneto (Lightspeed Ignition on the right). Which magneto
timer should I get? Do I need anything else to time the left mag?
>>>>
>>>> Thanks,
>>>>
>>>> --
>>>> Tom Sargent, N811WT , RV-6A
>>>> *
>>>>
>>>>
>>>> *
>>>
>>>
>>>
>>
>>
>>
>>
>
>
>
>
Message 5
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| Subject: | Re: compression test and mag timing equipment |
Oops, just notice I said engine was IO-260, It is of course an IO-360-B2B.
Thanks for all the info by the way.
On Tue, Jun 21, 2011 at 8:13 PM, thomas sargent <sarg314@gmail.com> wrote:
> I am getting ready to do the annual on my 6A and trying to figure out which
> cyl. compression tester to get. I have an IO-260-B2B. It has a 5.125"
> bore. I'm seeing conflicting information about the orifice size needed
> t\for such an engine. Is it 0.040" or 0.060"
>
> Also, I have but 1 magneto (Lightspeed Ignition on the right). Which
> magneto timer should I get? Do I need anything else to time the left mag?
>
> Thanks,
>
> --
> Tom Sargent, N811WT , RV-6A
>
> *
>
> *
>
>
--
Tom Sargent
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