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Generation IV Internal Engine
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push rods

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Old 10-18-2007, 01:34 PM   #1
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Default push rods

im trying to figure out push rod length

l92 heads with factory rockers on .620ish lift

thought about getting a length measurer but i figured i would ask before i got one and screwed up the measurements
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Old 10-18-2007, 06:22 PM   #2
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Originally Posted by blackbyrd View Post
im trying to figure out push rod length

l92 heads with factory rockers on .620ish lift

thought about getting a length measurer but i figured i would ask before i got one and screwed up the measurements
L92 heads will not require a pushrod length change. 7.400" is what we use in all of ours.

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Old 10-24-2007, 07:07 AM   #3
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even if the heads are on a 6.0 L iron block??
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Old 10-24-2007, 08:54 AM   #4
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even if the heads are on a 6.0 L iron block??
Yes because all of these engines have the same deck height with the exception of the LSX block.

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Old 10-24-2007, 12:11 PM   #5
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cool was unsure of that
thanks again
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Old 10-24-2007, 07:04 PM   #6
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Wouldn't you still have to use a different PR size if the heads have been milled say to 65cc. also what is the standard deck hi=eight the ls1/2-lQ9 iron blocks
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Old 06-30-2008, 08:58 PM   #7
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same question i have i am going to mill my heads .030 to retain stock cr worried that i will have to buy new push rods
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Old 07-01-2008, 10:16 AM   #8
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talking about push rods. i need a stock lenght set with a smaller oil hole? any one know where to get them?
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Old 07-01-2008, 11:17 AM   #9
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Big Bird WS6


You can get pushrods with restrictor holes through Smith Pushrods. I use them in my race car.
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Old 07-01-2008, 11:34 AM   #10
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If the heads are milled, couldn't you subtract the amount you milled your heads from the pushrod length (7.400") to get the pushrod length that you need for your particular application?
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Old 07-01-2008, 09:04 PM   #11
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If you shave the heads or change thickness in head gaskets or even have a valve job were they cut the seats moving the valve stem closer to the rocker, you need to check the pushrod length, so you don't collapse a lifter, But if every thing is stock height i just go stock length, But thats just me.
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Old 07-02-2008, 09:46 AM   #12
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Aftermarket cams have a smaller base circle too. I wouldn't think of buying pushrods before measuring if you have an aftermarket cam and milled heads.

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Old 07-03-2008, 03:30 PM   #13
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found some help here on this topic

http://forums.corvetteforum.com/show....php?t=1685795

This good link for checking the proper length
http://www.ls1tech.com/forums/showthread.php?t=637575
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Old 07-04-2008, 11:58 AM   #14
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stock heads stock gm headgasket 7.400 pushrods with around same lift cam
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Old 07-04-2008, 11:58 AM
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