[DeTomaso] NPC: Compression stroke and finding TDC

[Don Thomas]

Here is a easy way... all it takes is your thumb.

https://www.youtube.com/watch?v=FHX1yXVyIMg

Cheers !

-dt



On Tue, Jun 11, 2013 at 12:35 PM, Mikael <mikael_hass at mail.tele.dk> wrote:

> To find compression stroke: Remove the dist cap and see where the rotor is
> pointing and/or remove valve cover and see which valves are open. This
> assumes that the valve train and bottom end has been put together
> correctly.
>
> To find TDC, I've used this:
> http://www.summitracing.com/parts/CCA-4795/
> Turn engine by hand till piston stops, mark that position. Turn engine the
> other way until it stops again. Mark that position. TDC will be in the
> middle between those marks
>
> Mikael
>
> -----Oprindelig meddelelse-----
> Fra: Larry - Ohio Time Corp [mailto:larry at ohiotimecorp.com]
> Sendt: 11. juni 2013 16:09
> Til: spkorb at gmail.com; detomaso at poca.com
> Emne: Re: [DeTomaso] NPC: Compression stroke
>
> Sean,
>
> Back in my schoolin days we would smash out the center part of an old spark
> plug and solder in a 3/8" copper tube. We then cut and filed the tube into
> a
> whistle. It would sing out on the compression stroke.
>
> Years later when the plugs got smaller I made the same thing but just put a
> long hose on it so I could feel the pressure from inside the car. Less time
> to play with whistles then.
>
>
> Larry (more whistles time now) - Cleveland
>
>
>
> -----Original Message-----
> From: detomaso-bounces at poca.com [mailto:detomaso-bounces at poca.com] On
> Behalf
> Of Sean Korb
> Sent: Monday, June 10, 2013 9:41 PM
> To: detomaso at poca.com
> Subject: [DeTomaso] NPC: Compression stroke
>
> I was looking for TDC on the compression stroke of my 443FE and I thought I
> might have to pull a valve cover or use a boroscope (I've been wanting an
> excuse to get one for a while now) to make sure the exhaust valve was up.
> The timing marks were about 120 degrees BTDC on the harmonic balancer.  So
> I
> took a packing peanut and stuffed it in the spark plug hole.  Blipped the
> starter and it popped right out.  Eureka! Compression stroke!
>
> Another thing that could have happened is it could have been sucked into
> the
> cylinder.  But this stuff dissolves pretty well in gasoline and burns even
> better.  I got the idea from my uncle who would balance the side draft
> carburetors on his Mini by using a piece of styrofoam in a clear plastic
> tube and tune them until it didn't want to get sucked into one or the other
> carburetor.  I told him they invented this wonderful stuff called Automatic
> Transmission Fluid that does the same but he hasn't had that car in 40
> years.
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