"Speedy Jim" > schreef in bericht
...
> george taylor wrote:
>
>> Ok, I am not sure what is causing this, maybe someone will know. I
>> rebuilt a 1600 single port and went through and adjusted the valves.
>> Everything lined up correctly (valve wise) starting at #1 at tdc. When I
>> crank the motor instead of it sucking in air it blows out of the carb.
>> Did I some how put the cam in wrong? I can not picture it being in wrong
>> if I can get all the valves in the correct positions at tdc of each
>> cylinder. Any clues?
> Assuming you did get the cam marks lined up,
> there is not just ONE TDC for each cylinder, but in fact TWO.
>
> Take #1 cyl as an example.
> The first time that the pulley mark comes around,
> #1 piston is at its high point and the exhaust valve
> is open to let the burned gases out.
>
> The NEXT complete revolution of the pulley brings
> the mark up again, but this time #1 piston is
> completing the compression stroke and both Intake and Exhaust
> valves must be closed.
>
> Go thru it again. Focus on #1 valves. Turn the pulley
> and watch for the #1 rockers to "back off" at TDC.
> This would be the correct TDC to adjust #1 valves.
>
> Hard to explain; hope that was clear.
>
> --
>
> Speedy Jim
> http://www.nls.net/mp/volks/

So if i understand this correct there are 2 TDC positions?
As a novice i'm told to also line up the dizzy at the right mark(cyl 1),
does that automaticly set up the right TDC?

just wondering,
Roger