Timing 347?

[palerider94]

Just dropped in new 347 and need to set timing. It has comp xe274 cam, performer rpm intake, ready to run distrib, and trickflow heads. Should I use stock 302 timing settings? Thanks

 

[coolblue65]

I would probably start out around 12BTDC.

 

[68RCodeConv]

Once you deviate from stock throw the factory recommendations out the window. Every engine is different. Initial advance, vacuum advance, total mechanical, rate at which mechinical comes in - they all have to be experimented with to find the optimum.

Usually a bigger cam likes more initial (I run 15 degrees) and a fast advance curve. When you run more initial you usually have to restrict the mechanical advance to keep from having too much total.