Biggest valve for a 4in bore???

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Aug 30, 2006 | 11:54 PM

sr71bbjr

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From: DFW

Biggest valve for a 4in bore???

will 2.150 and 1.610's fit in a 4in bore? I know they will clear a 4.060 i'm just not sure about a 4in..

Aug 31, 2006 | 01:24 PM

SuperSporttruck

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Those size valves may fit becuase ET heads runs a 2.125/1.60 combo in their 4.00" bore LS7 head, but you may encounter a problem with shrouding the valve to much on the outside or the valves beind to close to each other on the inside, which both hurt flow.

Aug 31, 2006 | 01:52 PM

SStrokerAce

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Depends on the valve placement in the head castings.

What castings?

Bret

Aug 31, 2006 | 01:59 PM

BLKWS6

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Quote:

Originally Posted by SStrokerAce

Depends on the valve placement in the head castings.

What castings?

Bret

say like the L92 heads from Gm....with the 2.16 valve...

Aug 31, 2006 | 07:10 PM

SStrokerAce

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They fit, Holden has a LS2 block with L92 heads, that's where we get the L76 intakes from.

Bret

Aug 31, 2006 | 08:27 PM

sr71bbjr

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From: DFW

there in a allpro head..

Sep 1, 2006 | 05:57 AM

SStrokerAce

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Is it the LS7 style All Pro head or the other All Pro head? The valve spacing in the LS7/L92 stuff will allow it to fit, I don't think a standard Gen III head will. Only way is to put one in there and check.

Bret