TDC on the Bugeye

[Member 10617]

On my previous cars, I always set the timing using dynamic timing light, but on the Bugeye it appears that static timing is the way to go.

i am a little unclear about finding TDC for Static Timing on the Bugeye. According to the instructions I have, I need to turn the engine over so that No. 1 piston is coming up to the TDC on the compression stroke. The instructions go on to say that this can be checked by removing No. 1 spark plug and feeling the pressure being developed in the cylinder. But, it goes on, both No. 1 and 4 cylinders come up to TDC at the same time but only one is on the firing stroke. I assume this means that when No. 1 is on compression stroke, it is the only one with pressure (compression), and that No. 4 is rising to TDC without pressure as it is in exhaust stroke.

Just need to be sure I understand what is happening. u

Any guidance from experienced hands for static timing of the Bugeye will be greatly and warmly appreciated.

 

[smaceng]

Another way to check this is to remove the valve cover......TDC is when both rockers on #1 cylinder are closed. This is the same position used when setting the valve lash. Some people will take the #1 spark Plug out, and stick a straw in. The straw will go up and down as the crank is turned. When it is the farthest out, that is TDC.
Cheers,
Scott in CA

 

[Member 10617]

Hi, Scott,

Many thanks. But, with the straw approach, how do I know which cylinder is on the firing stroke if both No.1 and No. 4 are at TDC? If I can avoid it, I'd like not to have to remove the valve cover.

 

[dklawson]

Follow the spark plug wire for cylinder #1 back to the distributor cap. Remove the distributor cap and look at the rotor. Turn the engine over by hand until the rotor is pointing where the #1 spark plug wire attaches to the cap. That will be #1 on it firing stroke... approaching TDC.

 

[Member 10617]

Doug,

Many thanks.!