1970 350/350 Hard Start

[Duke W.]

Re: 1970 350/350 Hard Start

I plan to start with Leif's suggestion to accurately set the timing to factory specs.

The initial timing spec is 8 BTC, and with no vacuum advance, that's total idle advance, and it's is the reason why the excessively hot exhaust manifolds are frying everything in the engine compartment.

Duke

[Mike F.]

Re: 1970 350/350 Hard Start

I also have a 70 350/350, the timing, TCS, etc.. are all set-up factory correct and functioning. When I started having the same problem as you, it turned out to be the Restoration battery. Just not enough cold cranking amps. A generic battery from the local auto parts shop fixed the problem. I use the restoration battery for judging events.

[Duane D.]

Re: 1970 350/350 Hard Start

Mike,
Thanks for your response. After reading some of the Restoration battery stories, the battery was the prime suspect. I do disconnect the battery after use and it appears to be working ok. I am very careful to make sure the battery is fully charged before use. However, I do plan to replace the battery with a more powerful battery for normal use. I have tried more potent batteries over the last 50 years without success. The battery contributes to the problem, but I don't think it is the root cause. Again, thanks for your comments.