440 Engine tuning suggestions

69dodgedart360 said

Thank you to everyone foe the suggestions.

@Bewy my bad, yes the manifold is a single plane. Thank you for linking the articles and high lighting the text for me to read. Any idea which magazine that one was from?

@RustyRatRod

Thank you, i will try that.

@crackedback

Thank you, i will try that.

does anyone have suggestions on a spark plug that they have used and like for something like this?

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At 10.7:1 if that’s actually what it is and not a guess or just using an online calculator without taking actual measurements you need a Champion RC12YC.

Don’t buy the bullshit the NGK is mandatory. Before I tune anything I get Champion plugs in it.

When I’m done if the guy MUST have them I make sure the plug he wants to use matches the tune up. Plugs do not read the same. It’s far easier to read a Champion than an NGK and the Autolite is the most difficult to read.

RRR is correct. You do NOT need or want 30 initial. Thats just wrong for that compression, cam timing and displacement.

Then follow Crackedback’s advice and don’t drive it even if it likes the 18 initial. If you don’t correct the curve adding that much initial you’ll have too much total.