5/16" or 3/8" push rods????
Thread Starter
Racer
Joined: Jan 2007
Posts: 314
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From: Pittsfield, Ohio
5/16" or 3/8" push rods????
I accidently ordered the wrong size rods. Factory rods in my L82 are 5/16" and I got 3/8" 4130 rods. I have a new set of 3/8" guide plates already too. Can I use this combo in my 350? I see catalogs list both sizes for SBC's. What would the differences be? More weight to move I suppose??
Thanks
Thanks
Burning Brakes
Joined: May 2004
Posts: 1,100
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From: belle plaine ks
most guide plate usage requires hardened pushrods. If neither set is hardened the point is moot. But that being said I believe you use the 3/8ths pushrod with the 3/8th's guide plate. Non hardened pushrods will wear excessively against the guide plate. I don't know if 4130's are the hardened ones or just the quality of steel content. I just order the ones that say hardened. Does this help any?
Last edited by tigers123; Apr 5, 2007 at 11:18 PM.
Le Mans Master
Joined: Oct 2006
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From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
I suspect interference between the head and pushrods using the 3/8. I don't think the pushrod passages in the head are big enough for them. You;ll need to do a little machine work (drill)
Thread Starter
Racer
Joined: Jan 2007
Posts: 314
Likes: 0
From: Pittsfield, Ohio
most guide plate usage requires hardened pushrods. If neither set is hardened the point is moot. But that being said I believe you use the 3/8ths pushrod with the 3/8th's guide plate. Non hardened pushrods will wear excessively against the guide plate. I don't know if 4130's are the hardened ones or just the quality of steel content. I just order the ones that say hardened. Does this help any?
Team Owner
Joined: Apr 1999
Posts: 21,953
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
3/8th are significantly stronger and they are used in higher spring pressure roller motors. Weight is the only draw back.
1/16th is plenty of P.R. clearance
1/16th is plenty of P.R. clearance
Thread Starter
Racer
Joined: Jan 2007
Posts: 314
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From: Pittsfield, Ohio
THANKS!!
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Le Mans Master
Joined: Apr 2006
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stanard rocker the holes may be big enough to handle it, if your
using 1.6 don't see that working without doing some enlarging,
look at everthing good.
Thread Starter
Racer
Joined: Jan 2007
Posts: 314
Likes: 0
From: Pittsfield, Ohio
Now I just need a cam that will work on my 882 cast L82 heads. I need a new cam and want something equivilant or better. Summit #1105??
thanks for the tips!
