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Old 11-11-2019, 03:18 PM
78w72 78w72 is offline
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Join Date: Nov 2007
Location: iowa
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Originally Posted by footjoy View Post
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How do I get more horsepower out of this low compression 400 ci motor
ok. mill the 15 heads, gasket match or light port work, change to big valves.

pick a good cam to match the compression. consider 1.65 roller rockers if you use the cam you have for a little extra dur/lift.

use as thin of head gaskets as possible to keep the quench & comp as good as possible.

headers or good manifolds & good exhaust with free flowing mufflers.

those types of basic mods will be the cheapest way to increase power, unless you want to add a turbo....