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post #1 of 6 (permalink) Old 06-02-2011, 10:41 PM Thread Starter
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Cyl. Heads

Anybody know how big of valves you can cut the stock seats for? I see that alot of people have plus 1.5mm. Is that the biggest you can go without having new seats installed? Thanks for any replies
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post #2 of 6 (permalink) Old 06-02-2011, 11:57 PM
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Not sure about that, I have plus 4mm but had new seats, You can call Glenn at AMR (330-347-6800 or you can call Mickey at FST (814-842-6159) they can tell you for sure.

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post #3 of 6 (permalink) Old 06-03-2011, 07:53 AM
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I heard up to +5 for size. Things would be cut there for sure though.
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post #4 of 6 (permalink) Old 06-03-2011, 09:47 AM Thread Starter
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I'm running an 840 with JE pistons and they have valve reliefs big enough for plus 2mm valves is why I'm curious. The heads have been hand ported but i still have stock valves. bigdaddy did you get a set of plus 4mm cnc heads from FST? Are you happy with them and how much, if you don't mind me asking?
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post #5 of 6 (permalink) Old 06-03-2011, 01:06 PM
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No Glenn at AMR did all of my head work, or had it done, he did all the porting and I am not sure who he used on the machine work or to have the new seats cut.

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post #6 of 6 (permalink) Old 06-09-2011, 07:59 AM
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1.0 on stock seats

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