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Discussion Starter #1
Do I need to upgrade valve springs if I put 1.72 rockers on my heads. Still using stock cam.
 

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You can keep the stock springs until you either upgrade the heads or upgrade the cam.
 

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Discussion Starter #3
Isn't using 1.72 rockers like upgrading the cam slightly? I thought it raised the lift of the cam.
 

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Isn't using 1.72 rockers like upgrading the cam slightly? I thought it raised the lift of the cam.
They do indeed raise the valve lift from 0.442" to 0.478" (lobe lift is 0.278", stock rockers are 1.59 ratio) and since the stock springs are rated to ~0.500" of lift, they're still OK to use.
 

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Discussion Starter #5
ok thanks. Porting a stock set of heads for fun and gonna put them on just didt want to put too much $ into them cause this is me being bored with my stock motor and not having money to buy anything right now. Thanks
 
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