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Tech Question
colton herzog, PA, 1973 dodge charger 318
I am wondering if you know any way to get a little more horsepower out of a 318 without spending a lot of money. I don't want to get into changing the crank or cam, or even boring it. So if there any thng small that I could do for horsepower, what could it be?
Colton, there's no magic. But "bolt-ons", as these "small things" are typically referred to, DO work. What you're trying to do is get more air in and out of the engine, so it can burn more fuel.
If you pin me down, I'd have to say the first two places to start would be:
> Add a nice free-flowing dual exhaust system. It can be made by a local shop. The pipes should be 2.25" min.
> Swap the intake manifold to a dual plane one that will accept a 4-Bbl carburetor, and add the carb. If it's square-bore (bolt holes form an approximate square pattern and the 4 large holes are all about the same size), keep the carb as small as you can find: 450 to 600 CFM. If the manifold is spread bore, virtually any stock Thermo-Quad carb would be fine.
These two additions should add 30-40 HP, plus, as a bonus, the exhaust mods will improve mileage, and the carb swap will have almost no effect on MPG - if you can keep your foot out of it!
Rick
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