mp77

Ok. Today I tried to crank up the new motor for the first time, finally. It turned over until gas got to the carb, and then just backfired gasoline out of the carb several times. I must have the distributor stabbed wrong. I stabbed it with the number one piston at TDC and the rotor pointing at number one spark plug wire. Did I miss something? Is this not the correct way? :cheers:

LAvetteman

Got briefed on timing alot recently. Did the same thing, stabbed the distributor wrong and had to find the right tooth. Maybe advance or retard the distributor in the tooth its in......

From what I learned, and I may have this wrong, back through the carb means retard. (No pun intended) :)

Fromwhat I recall, we had the rotor pointing at "just before" no. 1 plug wire at TDC.


[Modified by 71,454,4spd, 5:07 PM 12/18/2002]

George Dickel

Are you sure it was TDC on the compression stroke because it sounds like the timing is still off. The piston could have been on the exhaust stroke instead.

scottw

mp77,
Check out Lars paper on how to set your timing. You can find it at http://www.corvettefaq.com in the engine section.
I had the same problem when I went to start mine the first time. You are probably only a tooth off or 180 degrees off.
Good luck.

mp77

I held my finger on number one plug hole as I turned the crank and the compression pushed my finger away. :cheers:

Twin_Turbo

It really doesn't matter where the rotor points, if you install the distributor just install #1 wire on the terminal where the rotor points at TDC #1. Just make sure you're not on TDC before intake stroke.

Marck


[Modified by Twin_Turbo, 5:33 PM 12/18/2002]

7Bob3

That's kind of a tough way to do it. Bring the balancer to 0 deg. remove the right valve cover and look at # 6. When you rock the balancer 5 deg on either side of 0 the exh. will open before 0 and the intake will open after 0. If this happens set at 0 and you are at TDC #1. If there is no movement of the valves at # 6 when rocking you are on TDC #6. Turn the crank 1 revolution, you will be on #1, use this point on your distributor ( where the rotor points) as #1. Set your plug wires in order and it will start. As stated above it makes no differance which cap hole you use for # 1 to start it and break in the cam. You can re stab the distributor later.

redwingvette

And if that doesn't do it check your plug wires to make sure there not crossed. It's pretty easy to do if you still have all the covers on.