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/