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Old 10-31-2004, 02:54 PM
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fair price for port and polish?

I have a 350 sbc with a performer rpm manifold edelbrock 600 carb 280 comp magnum cam headers and 882 heads im looking for the cheapest way to make horsepower. I was looking at the dart iron eagle heads and was wondering if it owuld be cheaper to port and polish my 882's how much power could i expect and what would be a fair price from a machine shop?

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Old 10-31-2004, 04:03 PM
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It been several years since the last time I did a full port job. I would guess that it takes me about 40 hours to port the intake and exhuast and polish the exhuast. That's not including the valve job. Others may be able to do it quicker but take 40 hours as an average and multiply that by your machine shop's hourly rate. You'll find that you can buy aftermarket heads cheaper and you still haven't started on the valve job, valve guides or bought any parts. No set of 882 castings is worth this price.
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Old 10-31-2004, 08:03 PM
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In my op-ion you would be far better of starting with the new head then porting the 882.You can just about by any port flow out there that you want in an as cast port.Plus you get a better head to start with.




mike
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Old 10-31-2004, 08:45 PM
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ive been looking at the dart iron eagles they seem to be a pretty good price im just not sure which exact one i would benefit from the most i can get a pair of 165cc's for $570
or the 200 cc's are like 730 assembled
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Old 11-01-2004, 07:31 PM
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Dont pay somebody to port stock heads unless you are racing in some kind of class that requires them.Porting stock heads is a great way to make lowbuck power if you are doing it yourself,but if you pay somebody to do it,you are wasting money.Almost all heads can benefit from some cleanup before being ut into use,even very expensive aftermarket heads.This type of cleanup is the best type of work you can do for the money even when done on stock heads.
The first thing you need to do is determine if your stock heads need a rebuild and how much it will cost.If the combo you want to build includes new stainless valves in bigger then stock size,the a set of aftermarket heads might already be a cheaper option.If your heads are O.K.,and you want to find some quick power for next to no money,you can invest in a valve spring compressor and disasemble your heads{keeping all the parts in order where the came from},and do a mild port cleanup.A good job on stock 350 chevy heads like your 882's would be to blend the valve area behind the bowls,clean up any sharp edges in the combustion chamber,and gasket match the intake port entries to a felpro "small race" gasket.Dont port the head more then about 1" in to the port,just blend the port opening to the size of the gasket.Clean any carbon off the ports and valves,I like to polish the valves before putting them back in.You can put the valves into a drill press and run a piece of emory paper over the backs of the valves to clean them up as long as you aviod prolonged contact between the emory paper and the machines surface of the valve seat.You can clean the valve faces off in a similar way.You can then lap the valves back into the heads and reassemble them.This type of cleanup can be worth about 20 to 30 hp on a typical 300hp 350.It wont hurt low end performance and it wont make the engine more radical,so it is really the best bang for the buck you can get.Good luck.
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Old 11-01-2004, 08:49 PM
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im just kind of scared to port the bowls i have a book that says how to do it and i have a die grinder maybe i will try it
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Old 11-01-2004, 09:31 PM
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I charge $700.00 for a full port job with air flow testing included, but I really don't make any money doing it, as it is a very time consuming job, no matter how skilled you are at it.

In your case, you might look into having the bowls cut with a "bowl hog" and getting a top quality valve job done.

You could clean up the rest of the machining marks and call it good.

You could probably get that kind of work done for a couple of hundred bucks.

Brian
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