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  #16 (permalink)  
Old 12-21-2008, 11:37 AM
How fast is fast enough?
 
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the XE262 seems to be the popular choice and isn't a bad one, I still think you need a tighter LSA to compensate for poor head flow, but to each their own.

416's can be ported to do a pretty good job- it just takes time. You can get a 1/4" die grinder, a rheostat and a porting kit all o fof ebay for about $100 total- shipped. Its cheap chinese tools, but so far they've been working well for me- you just need to change the contacts on the grinder after every set of heads.

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  #17 (permalink)  
Old 12-21-2008, 11:04 PM
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good luck although i feel pretty competent in my skills i havent tried home porting yet (mainly cause i dont have any scrap heads to practice on (like a painter and his canvas i guess)
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Old 12-22-2008, 07:09 AM
How fast is fast enough?
 
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Quote:
Originally Posted by F-BIRD'88
Here in Canada you can get a decent elec die grinder from Princess auto.
I've had the same one for years and done many sets of heads. I actually own two. $55/each.
You can get the carbide burrs from Eastwood or carbidebur.com You'll need one with a 6" long shaft to get deep in the intake port.

Being its this guys first go at porting I would stay away from carbide burs. They work great but if you get a little over zealous you can hog a big ol hole in your heads without realizing it. Using stones and cartridge rolls will take you a little longer but are more forgiving and allow more finess. I have a hand full of carbides I use but 65% of my work is done with stones and rolls.
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Old 12-23-2008, 09:44 AM
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I absolutely could NOT agree more with you Man I wish the tech school here taught speed secrets hot tips and tricks they use to be a pretty good school for the diy'er with engines and what not but i think the main dude retired and they just havent found a replacement
any hoo id pay for that class.
I have a complete set of OLDS 5 heads i thought about getting mildly ported
emphasis on mildly but i cant pony up just for that and the modest gains i dunno if it warrants the $ thats why i want to learn it myself
I dunno maybe ill just sell 'em????
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  #20 (permalink)  
Old 12-23-2008, 10:13 AM
How fast is fast enough?
 
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I have a few sets of olds heads, 5's and 7's. I would recomend taking a class on fluid dynamics before you start porting- I had to for my engineering degree and after that it seems relatively simple.
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Old 12-23-2008, 10:25 AM
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thnx ap72 hey just outta curiousity if you were to sell the 5's (dead stock I assume) how much would you ask? reason is I am building a 400 chevy and thought about parting with my 5 heads they are stock but complete what would you want for em if you were me?
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  #22 (permalink)  
Old 12-23-2008, 01:23 PM
How fast is fast enough?
 
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In stock non-rebuilt condition I'd probably say about $100-$200. They're great head if you put the work into them but any stock used head isn't going to be a gold mine.
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Old 12-23-2008, 02:07 PM
How fast is fast enough?
 
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I didn't mean to imply you needed a degree, just that head porting is just using the same fluids principals that are used in MANY other applications. Understanding how to keep it mixed and still flow well has more than just automotive uses.


And Vizard has some great stuff- I suggest reading all you can at Gofastnews.
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