Hand Porting Al Heads?
Melting Slicks
Joined: Apr 2002
Posts: 3,019
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From: down that one road next to that big tree
Re: Hand Porting Al Heads? (KYVette90)
check this thread http://forums.corvetteforum.com/zerothread?id=379838
Pro
Joined: Aug 2002
Posts: 702
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From: the corner of walk and dont walk
Re: Hand Porting Al Heads? (KYVette90)
It depends on your knowledge of airflow, port design, and velosity. I hand port all of the cylinder heads, intake manifolds, and carburator that I use for myself as well as the ones I sell/install on other peoples engines. Hand porting is not inferior to cnc porting, as long as the person doing it has the proper knowledge and tools to do the job correctly. If the person programing the cnc does not understand the proper way to port the runner in which he is working on, it will be just as junk as one done by hand if the person doing it by hand doesn't know what he's doing either! CNC, is faster, and therefore less expensive, but it does not make it better. If you understand what you are doing, and have all the correct tools/instruments for measuring and doing your work, hand porting is just as good as cnc. As for improvements, it all depends on how far you are willing or capable of going. Yes, there is definiately room for improvements. :cheers:
[Modified by sinistervette, 9:34 PM 9/20/2002]
[Modified by sinistervette, 9:34 PM 9/20/2002]
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
Re: Hand Porting Al Heads? (KYVette90)
The stock #113 heads are rated to flow to about 350hp and, pocket ported, to over 400hp. It should be worth about 25hp gain along with other appropriate air and fuel flow mods to a 350cid TPI engine.
As mentioned, if you've not ported heads, do your homework and get the proper tools. Summit has a good video from Standard Abrasives to get you started. If you don't have access to a die grinder I can give you a P/N to a Sears electrical unit that was used for a mag article on head porting.
[Modified by 65Z01, 3:43 PM 9/20/2002]
As mentioned, if you've not ported heads, do your homework and get the proper tools. Summit has a good video from Standard Abrasives to get you started. If you don't have access to a die grinder I can give you a P/N to a Sears electrical unit that was used for a mag article on head porting.
[Modified by 65Z01, 3:43 PM 9/20/2002]
