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Old 03-05-2003, 11:05 AM
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Post Vortec heads and High Valve Lift Question

Got a question for a friend of mine on a set of Vortec Heads. He has a set of heads setup with Aftermarket Roller Cam springs. It is also my understanding that it must have longer stem valves to accomodate over .500 lift but I am not sure about this. I have never messed with Vortecs.

The question is does anyone know a source for high lift springs to replace the existing springs. These springs seat pressure is too high for hydraulic or solid cams and need to be replaced, but he has not been able to find anyone that will sell the springs by themself. All the manufacturors want to sell cam kits and do not sell springs without everything else.

Thanks,

Chris

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Old 03-05-2003, 12:32 PM
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Actually, the valve guides get machined down for big lifts.

How much cam are we talking about here?
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Old 03-05-2003, 12:40 PM
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I am really not sure. He is just looking to put .500-.520 range cam, so around 125 or so seat pressure would work. If the guides are just machined down, then I suppose his problem is just with the odd vortec spring size. Like I say, I have never messed with these things so I kindof have to plead stupid.

The problem originated when the springs started eating cams.

Chris
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Old 03-05-2003, 03:08 PM
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I always thought that vortecs took the same springs as the old heads? I know several racers that run vortecs and they've never said anyting about differnt springs..
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Old 03-05-2003, 03:16 PM
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YOu can still open up the pockets to use larger diameter springs
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