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243 Valve question again

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Old 10-12-2013, 09:39 AM
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Default 243 Valve question again

The valves on the stock 243 heads seem to be awful small. What is the biggest valve you can put on these heads? Who makes the lightest? 4.000 inch bore cyl

Thanks
Dan
Old 10-12-2013, 10:44 AM
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Without changing the seats I believe the biggest is 2.02. What CID is the motor? Stock 2.0 valves when done right are plenty for most 364ci or less street/strip stuff
Old 10-12-2013, 11:22 AM
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Turned down LS3 valves to 2.08, seat will have to be changed.
Old 10-12-2013, 11:59 AM
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I do not mind having the seats machined if its worth it.

Thank you for the replies.

I do not think the stock valves are going to be good enough for what I want. Its a grudge car. I am new to LS stuff I have always done SBF before.

Last edited by racels; 10-12-2013 at 12:06 PM.
Old 10-12-2013, 12:24 PM
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You can fit the 2.165" LS3 intake valves without turning them down.
Old 10-12-2013, 12:53 PM
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what about on the exhaust side?
Old 10-12-2013, 01:35 PM
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That would depend on the intake valve, but 1.60" easy with the stock seat.
Old 10-12-2013, 02:01 PM
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KCS you seem to know a lot about valves. Mind if I send you a pm with some more details for some questions. This is a grudge car to make money with so I do not want specs all over the internet.
Old 10-12-2013, 04:07 PM
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Sure, go for it



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