sbc 350 temps

[GreaseDog]

a lean mixture takes longer to burn and a rich mixture burns faster.....

uh no... A lean mixture will burn faster than a rich mixture, based simply on the fact that there is more fuel to burn. Which drinks faster? A shot of tequila, or a fifth?

6 deg base timing for a crate motor 350 is way too retarded 10-12 would be about right.......... and he will be running an aftermarket carb also.....

without every laying you're hands on the truck, or parking your keister in the drivers seat, an assumption like that is nothing more than a guess on your part. I've had multiple stock 77-79 350s... Some only liked 4° initial, others liked 12°, others fell somewhere in between. Same engine specs on all of them, same build era, all were sold running engines. Fact is, production tolerances vary, and things like ignition timing follow.

My stock L05 with a Qjet mounted on top loves 13° initial timing, the second it goes over 32° total advance, it breaks up and you can tell it's really fighting against itself. It's a bone stock longblock with 112k on it. Keep it timed where it's happy and it will never miss a beat.

 

[chengny]

It would appear that the OP has lost interest.

Maybe he just needed to install a 195 degree thermostat.

Or, maybe he found out that the coolant temp sender was in the wrong place. For example, at the front of the intake manifold where the temp sender for the ECM goes - the coolant always reads a little hotter there.

Then, when he moved it to the side of the cylinder head, his dash reading dropped.