Milling 5.3L heads
10-07-2003, 08:51 AM
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Milling 5.3L heads If I milled a set of stock 5.3 heads to give an 11:1 compression, and changed nothing else, would that be enough to get 10 or 15 hp out of?
10-08-2003, 11:54 AM
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Re: Milling 5.3L heads if these are for a LS1. Then you'll probably not gain any power...more like lose power due to the smaller valves found in unmodified 5.3L heads.
10-09-2003, 11:41 AM
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Re: Milling 5.3L heads if you mill a stock head you can increase combustion efficiency...but I doubt it'd be more than a few HP. If you mill enough to reach 11:1 you then have to start worrying about PV clearance if you run an aftermarket cam.
10-09-2003, 10:38 PM
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Re: Milling 5.3L heads I'd say that a bump in compression that slight will get you maybe 5-8 at the wheels. Don't expect much out of it. Milling too much will seriously limit the amount of cam you can choose from without getting one ground special.
