LS valve lengths
Thread Starter
Joined: Aug 2011
Posts: 4,730
Likes: 815
From: Portland, OR
LS valve lengths Hey guys,
I picked up a set of valves that were supposed to be for LS heads. NIB and were dirt cheap.
2.08/1.60 8mm stem LS round locks.
Problem is they are 5” long.
LS are 4.9” correct?
Were there any LS valves 5”
long?
I picked up a set of valves that were supposed to be for LS heads. NIB and were dirt cheap.
2.08/1.60 8mm stem LS round locks.
Problem is they are 5” long.
LS are 4.9” correct?
Were there any LS valves 5”
long?
TECH Addict
Joined: Dec 2017
Posts: 2,188
Likes: 973
Yes stock ones are various lengths near that; from 4.87x to 4.92x. I don't know of any that are 5" butt that doesn't mean there aren't any.
Aftermarket ones might be available in any length, usually longer than stock, to accommodate different configurations. Longer ones are usually used to allow bigger springs which in turn are to allow more lift before coil bind. .100" long is pretty common in engine building in general.
Aftermarket ones might be available in any length, usually longer than stock, to accommodate different configurations. Longer ones are usually used to allow bigger springs which in turn are to allow more lift before coil bind. .100" long is pretty common in engine building in general.
Thread Starter
Joined: Aug 2011
Posts: 4,730
Likes: 815
From: Portland, OR
I understand all that. It would take taller stands, longer pushrods etc to reestablish correct rocker wipe. If used in most LS heads.
If I would have had calipers with me I wouldn’t have spent the $100.
If I would have had calipers with me I wouldn’t have spent the $100.
TECH Addict
Joined: Oct 2002
Posts: 2,795
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From: Mefis
Thread Starter
Joined: Aug 2011
Posts: 4,730
Likes: 815
From: Portland, OR
They were actually installed in SBC AFR heads but never run.
Maybe he just couldn’t figure out the correct keeper/retainer combo to work with his rockers?
I just know him from the drag strip. And incorrectly assumed he knew what he was talking about.
Maybe he just couldn’t figure out the correct keeper/retainer combo to work with his rockers?
I just know him from the drag strip. And incorrectly assumed he knew what he was talking about.
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Thread Starter
Joined: Aug 2011
Posts: 4,730
Likes: 815
From: Portland, OR
so at this point I have no use for them