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Piston to valve clearence help..

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Old Nov 12, 2002 | 03:20 PM
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Default Piston to valve clearence help..

Okay not being the Auto math wizard some of you guys are i have a question.

Last year i bought an ARE stage 2 head/cam setup.

The head is a 98 ls1 head with 2.08 1.60 valves (wanted big valve for big bore motor im planning)

Problem is i do not know how much was taken off the head. I had asked for 11.0-1 compression. However at the time Nick was saying i should go 10.6-10.8 to 1. I have never verified what i have as they are on the car.

The cam is the 226/234 55x/57x 112ls

Im looking to do a 230/226 .573/.570 112ls

is this even goin to be possible? its a hell of a lot cheaper to just swap the cam rather than to pull the heads off and everything

can anyone help?
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Old Nov 12, 2002 | 03:24 PM
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Default Re: Piston to valve clearence help..

I have a feeling the only way you are going to be able to find out is to put that cam in and try it. Once you get up to a cam of that size and have heads that may be milled, along with a 2.08 intake valve, the variables are just getting too close to say for sure. I dont think the setup would have enough clearance to make me comfortable, but it may work just fine.

I'd stick with what you have, or pull the heads and check clearance if you really want that big cam in there.
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Old Nov 12, 2002 | 03:26 PM
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Default Re: Piston to valve clearence help..

Thing is i absolutely dislike the cam that i currently have <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
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Old Nov 12, 2002 | 03:34 PM
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Default Re: Piston to valve clearence help..

Put it in and turn the motor over by hand.
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Old Nov 12, 2002 | 03:34 PM
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Default Re: Piston to valve clearence help..

JMX is spot on (I think I said this 3 times this week) you are the point where you need to measure it and see if it's no big deal or a bit tight.

New cam sounds neat but that older cam you are doggin' propelled a few cars in the 12_mph range with a stock bottom end and at 3400-3500 raceweight.
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Old Nov 12, 2002 | 03:44 PM
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Default Re: Piston to valve clearence help..

John,

Blah! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
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