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Aluminum Pistons in my B question anyone have the answer

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Chris

04-10-2003 20:02:28




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I am gonna have to rering my 39b. Now while im in there is there someone who sells the standard size aluminum pistons. Its in good enough shape it doesnt need a bore job nor is it gonna get one i just thought if while i was in there i could drop in a few more horses it would be nice. If not im just gonna stick me some rings in and go. Thanks Chris




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G Taylor

04-11-2003 08:17:22




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 Re: Aluminum Pistons in my B question anyone have the answer in reply to Chris, 04-10-2003 20:02:28  
At the same compression ratio the cast iron pistons would make slightly more HP. Boost the compression to 7 or 8 to along with a gasoline manifold and she'll pickup two or three HP. More if the head valve bowls are ported.



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ChuckW

04-10-2003 21:14:01




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 Re: Aluminum Pistons in my B question anyone have the answer in reply to Chris, 04-10-2003 20:02:28  
from my experience you'll be taking a step backward going to the aluminum pistons. The original cast balance and wear much better. As for a rebore for more HP, not worth the effort. But if you do rebore and use the aluminum, be sure to allow more clearance as if you bore to the size for cast iron your aluminum will be seizing.



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Haybaler

04-11-2003 07:32:09




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 Re: Re: Aluminum Pistons in my B question anyone have the answer in reply to ChuckW, 04-10-2003 21:14:01  
I agree I would rering and go.



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