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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 08-26-2007, 06:51 PM   #1
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Default E303 with the stock rocker arms??

will the stock rockers work with the E303? I didn't know if the slot would be long enough. Sure would hate to bend all my pushrods.
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Old 08-26-2007, 07:14 PM   #2
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Default RE: E303 with the stock rocker arms??

Will work fine but i would get some 1.6 roller rockers for extra horse
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Old 08-26-2007, 08:26 PM   #3
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Default RE: E303 with the stock rocker arms??

shouldn't be a problem. i've got an e303 with stock valvetrain.
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Old 08-26-2007, 08:36 PM   #4
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Default RE: E303 with the stock rocker arms??

good deal. So what lift can the stock springs and rockers handle?
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Old 08-26-2007, 09:15 PM   #5
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Default RE: E303 with the stock rocker arms??

Why would you want to install an aftermarket cam, if the suppporting components are not upgraded?.......stock valve springs are so-so for the stock cam, the B, E, stg x, etc.....require valve train upgrades. FYI....with the E303 and 1.6 rockers (stock)....you are .012" from coil bind (.060" is the minimum gap required) on the exhaust valves, add some revs to that condition, and you're close from having valve train problems.....in addition, the spring rate the cam needs to control those valves, is not "available" from the stock parts.......Just a thought.
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Old 08-26-2007, 09:23 PM   #6
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Default RE: E303 with the stock rocker arms??

ok will I can get some springs easy enough. I was going to have the heads off anyway . But the rockers will work?
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Old 08-26-2007, 09:38 PM   #7
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Default RE: E303 with the stock rocker arms??

The rockers will work, but you may also need to change the pushrods....for that, you might need to check the rocker-to-valve gap following the collapsed lifter method......for the direct replacement springs/retainers you may want to ask for them here ..... send him an email and tell him I sent you.
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Old 08-26-2007, 09:45 PM   #8
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Default RE: E303 with the stock rocker arms??

is checking the rocker to valve for the preload? I'm guessing that is the reason for the differant length pushrods that can be bought.
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Old 08-26-2007, 11:59 PM   #9
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Default RE: E303 with the stock rocker arms??

what springs are you guys using with this cam if I don't want to run the stockers?
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Old 08-27-2007, 12:06 AM   #10
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Default RE: E303 with the stock rocker arms??

i have the e cam with 1.7 crane rrs and trickflow stock length pushrods. the heads have been milled and the engine runs smooth and quiet well no piston to valve problem
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Old 08-27-2007, 12:06 AM
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