LS1TECH - Camaro and Firebird Forum Discussion

317 castings on a stock short block?

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Old 03-23-2012, 04:41 PM
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Default 317 castings on a stock short block?
Are these castings any good? Found a pair for really cheap, and was wondering what the opinion is on them. I running the stock 853 castings right now, so looking for a cheap upgrade when I drop the cam in.
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Old 03-23-2012, 04:47 PM
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They will lower your compression about half a point. Milling them to a stock size chamber decreases your PTV clearance and adds cost at a minimum of $100 to have the set milled. Save your $$ and buy some 243's.
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Old 03-23-2012, 05:51 PM
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They make 1000 HP
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Old 03-23-2012, 06:12 PM
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I run them on my 6.0, just stock lq4/9 heads, great for a 6.0, but as mentioned, lower compression on ls1 short blocks and 4.8/5.3s.
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Old 03-23-2012, 06:22 PM
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Well I was planning on having them milled, p&p, and a valve job. Guy wants $100 for them so I thought it was a decent deal. I guess I was wrong.
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Old 03-23-2012, 07:39 PM
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great deal, I made 640 on my little ole 5.7 m6 gto had 510 race engineeing do all the work stock CC on the heads
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Old 03-23-2012, 08:50 PM
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I'll probably buy them anyway and see what happens.
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