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Timing Lightspeed
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phil(at)petrasoft.net
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PostPosted: Mon Oct 23, 2006 5:20 am    Post subject: Timing Lightspeed Reply with quote

Yes I checked it with a light because I was troubleshooting some engine
problems that I had. It turns out that the "mechanics" that assembled
my engine can't read directions and timed the Lightspeed when the LED
turned ON instead of OFF. When I checked it with the light (this is a
two pilot job BTW) it was 5 degrees off. After I readjusted the hall
effect sensor (according to the book) it was right on the money.

The way I did it was to clamp a piece of hinge pin somewhere on the
engine so that you have a pointer just behind the flywheel. Then rotate
the prop until the TDC mark on the front lines up. (Mine is the little
hole in the starter) Then you can line your pointer up to the TDC mark
on the back of the flywheel. Then take a sharpie and darken the 25 deg
mark. Then you unhook the MAP sensor to the Lightspeed, connect the
strobe light, have another pilot start the engine and then just check it
like a car.

Godspeed,

Phil Birkelbach - Houston Texas
RV-7 N727WB
http://www.myrv7.com

Bobby Hester wrote:
Quote:


Phil, I have the halls effect sensor also and just got it adjusted and
started my engine for the first time today. Did you check yours with
the auto strobe light? If so how did you do it? Do you have a key
switch? Do you know how the wires are hooked up on the back of it? It
appear that my mag is not grounded with the key off.

------
Surfing the web from my laptop in Hopkinsville, KY
Visit my RV7A site: http://www.geocities.com/hester-hoptown/RVSite/

Phil Birkelbach wrote:

>
>
> I have the hall effect sensor on mine which is adjustable so it makes
> sense for me to check it on occasion.
>
> Godspeed,
>
> Phil
>
> Mark E Navratil wrote:
>
>>
>>
>> I'm curious, has anyone actually found that the Lightspeed timing was
>> off, and if so, did you discover any reason for the inaccuracy? I have
>> dual Lightspeeds with the crank trigger pickups and I admit I did not
>> check the timing with a light. I did verify that the magnets were
>> installed in the flywheel and the pickup bracket was correctly aligned
>> per Lightspeed instructions. After 100 hrs in flight, no problems with
>> anything. But that doesn't guarantee the timing is right so maybe I
>> need
>> to check it??
>>
>> --Mark Navratil
>> Cedar Rapids, Iowa
>> RV-8A N2D with 100 hrs of huge grins...
>>
>>
>




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martin(at)gbonline.com
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PostPosted: Tue Oct 24, 2006 4:31 pm    Post subject: Timing Lightspeed Reply with quote

Mark,
When I installed my lightspeed 5 years ago, I did the same as you and it
worked. However after talking to Klaus S at OSH that year, I realized while
it worked ok, I was missing some of the extra performance available. I then
got out the instructions and borrowed my sons timing light for his race car
and reset the Ignition per instructions and realize a significant increase
in overall performance ie. more power, etc.
Dick Martin
RV8 N233M
the fast one
---


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