PoppyMod
Member
Ok let me see if I can list all that has been done and what is planned.
Note that the piston goes up to TOP DEAD CENTER twice throughout the 4-cycles. With the way the crank is laid out, #3 & #5 are at TOP DEAD CENTER at the same time, also true for #4 & #7, #2 & #8, and #1 & #6. In theory and depending on the cam design, there could be several options for firing order in this engine. It's simply a matter of choice (chosen by the cam/engine designer) of which of the 2 pistons that are AT TOP DEAD CENTER, at the same time, are at the top of the compression stroke or at the top of the exhaust stroke. Luckily, small block Ford engines only use one of the 2 choices you listed and the only big issue is making sure that your ignition (spark plug wires) is set up for your particular firing order. What the reason is behind the 2 different firing orders is a mystery to me, but other folks here, smarter than me, might be able to explain. Relax, you are good to go.
Quoting Horseballz above because this is what I was thinking but did not know how to express it, so I think I am good with the cam I have and the firing order of 1 3 7 ...
The machinist got the push rods, I purchased the Roller Rocker arms from Summit. They are: Hi Tech Pro magnum Ultra Pro Magnum Roller Rocker Arms.
Summit part number: CCA 1331-16. (1.6 3/8)
My engine is an external balanced type. The machine shop balanced it, I provided the new flex plate and harmonic balancer, both new.
The block does have the "spider" on top (under intake manifold).
sparx
OK Bud,
Don't worry about which pistons are at top dead center at the same time as it's not neccessary, in of itself. Your valve adjustments will start with #1 piston at TDC (0) with the pointer opposite the (0) on the balancer. those two lifters will be deep in their bores, relative speaking. If you want really make this a learning process, Install the distributor alighning the rotor to # 1 position of the cap at the same time. Then, after adjusting # 1's valves, rotate the dizzy to the next firing position (#3) and adjust the valves of that cyl. and so on til your finished. Rotate the crank back to # 1 again, your rotor should be pointing to #1 plug position and both # 1 valves should be closed. Pull the dizzy , install the intake "do not" let the dog or cat rotate the crank before re-installing the dizzy, insure, it is pointing to #1 again.
Hope this helps!