Crankshaft
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Joined: Dec 1969
Posts: 27,728
From: Little Rock, AR
Quote from another website:
(http://www.automotiverebuilder.com/ar/ar99928.htm )
(http://www.automotiverebuilder.com/ar/ar99928.htm )
CRANKS
350 - The crank for the LT1 looks just like the one in the late 350 and has the same casting number 14088526, but it’s balanced for the lightweight pistons that were installed in the LT1. Be sure to keep these cranks separate so they don’t end up in a regular 350, and don’t ever use a regular 350 crank in a LT1. In fact, if you are short of LT1 cranks and don’t have a balancing machine in your shop, you would be better off using a crank from a 305 instead of a 350 because it’s actually closer to the balance specs for the LT1 crank.
350 - The crank for the LT1 looks just like the one in the late 350 and has the same casting number 14088526, but it’s balanced for the lightweight pistons that were installed in the LT1. Be sure to keep these cranks separate so they don’t end up in a regular 350, and don’t ever use a regular 350 crank in a LT1. In fact, if you are short of LT1 cranks and don’t have a balancing machine in your shop, you would be better off using a crank from a 305 instead of a 350 because it’s actually closer to the balance specs for the LT1 crank.
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Joined: Jul 2002
Posts: 3,768
From: Friendswood, TX, USA
Quote from another website:
(http://www.automotiverebuilder.com/ar/ar99928.htm )
(http://www.automotiverebuilder.com/ar/ar99928.htm )
I'm assuming that this only applies IF you are using the old style SBC crank with the stock LT1 pistons and rods, OR the old style pistons and rods on a stock LT1 crank.
AND that this does NOT apply if you are changing the entire assembly, (crank, rods, and pistons)???
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Joined: Aug 2007
Posts: 124
From: Iowa
my engine had gen 1 sbc pistons in it when i bought it with the stock GM powdered rods and stock LT1 crank, but im not worried about it now cause the auction on the crank on ebay is over so ill be using my stock crank
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Joined: Dec 1969
Posts: 27,728
From: Little Rock, AR
I hate this kind of advise! He tells you not to do something but doesn't fully explain.
I'm assuming that this only applies IF you are using the old style SBC crank with the stock LT1 pistons and rods, OR the old style pistons and rods on a stock LT1 crank.
AND that this does NOT apply if you are changing the entire assembly, (crank, rods, and pistons)???
I'm assuming that this only applies IF you are using the old style SBC crank with the stock LT1 pistons and rods, OR the old style pistons and rods on a stock LT1 crank.
AND that this does NOT apply if you are changing the entire assembly, (crank, rods, and pistons)???
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Joined: Mar 2007
Posts: 1,173
I have gen I pistons in mine because i didn't know beter when I ordered them, and now it has three spun mains I'm geussing from being out of balance. Seeing as i need to buy a new crank any way I was wondering if I ould get a gen I crank or do I need to get the lt1 crank and get some lt1 pistons.
Last edited by mdenz3; Oct 16, 2007 at 05:54 PM.
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Joined: Oct 2006
Posts: 4,970
From: Goochland, Va.
But will a gen I crank work with gen I pistons in an lt1?
I have gen I pistons in mine because i didn't know beter when I ordered them, and now it has three spun mains I'm geussing from being out of balance. Seeing as i need to buy a new crank any way I was wondering if I ould get a gen I crank or do I need to get the lt1 crank and get some lt1 pistons.
I have gen I pistons in mine because i didn't know beter when I ordered them, and now it has three spun mains I'm geussing from being out of balance. Seeing as i need to buy a new crank any way I was wondering if I ould get a gen I crank or do I need to get the lt1 crank and get some lt1 pistons.
Will it last?...hell no
Everything needs to be balanced....always in anything hi performance. stock would probly get by but rpms mean everything needs to be right
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