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L92/LS3 Head Exhaust Question

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L92/LS3 Head Exhaust Question

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Nov 21, 2008 | 06:29 AM

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L92/LS3 Head Exhaust Question

I know the stock Valve sizes are 2.16/1.59, and that with a 4.000" Bore that the Exhaust side is really close to the Cylinder Wall.

My question is can the Exhaust be made larger with a larger Cylinder Bore to get more clearance? Is there enough clearance in the Head Chamber as well to accomodate say a 1.62 Valve?

Has this or something similar been tried?

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Jan 4, 2009 | 03:16 PM

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Current trends are not leaning towards larger exhaust valves so I'm not sure anyone has tried it.

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Jan 4, 2009 | 11:10 PM

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A larger valve would be nice but not sure its worth the hassle. Most are porting the exhaust and running 1 7/8"-2" header.

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