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Piston to Valve Clearance

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Old 03-15-2007, 07:10 PM
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Default Piston to Valve Clearance

How big of a Cam can I put in a stock LS1 before I have to start worrying about piston to valve clearance ?


THanks,

Jon
Old 03-15-2007, 07:23 PM
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I have a Lg x3 .600/.609, and no problems. Just needed better springs.
Old 03-15-2007, 08:50 PM
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T-Rex, MS4, G5x4, FMS-15, texas giant. They all fit, as long as youre runningstock heads. Change anything on the heads or even te gasket, and all bets are off...
Old 03-16-2007, 09:17 AM
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Originally Posted by GuitsBoy
T-Rex, MS4, G5x4, FMS-15, texas giant. They all fit, as long as youre runningstock heads. Change anything on the heads or even te gasket, and all bets are off...

ouch!
So anyone know what can clear on a stock motor, with Trick Flow Heads?
w/ no milling?
Old 03-16-2007, 09:19 AM
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Once you mess with the heads or gaskets you have to measure PTVC. Your best bet is to buy your heads/cam and when you install them flycut the piston tops when you do the swap.
Old 03-16-2007, 10:34 AM
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since the TF heads change the valve angle...doesn't that increase the clearance on the valves??

or so i've heard.

so assuming stock gasket..you could run a bigger cam than you can on other heads...or possibly a thinner gasket.

but i think your question falls under the "if you have to ask..."

you may as well check to confirm
Old 03-16-2007, 03:06 PM
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Originally Posted by teke184
since the TF heads change the valve angle...doesn't that increase the clearance on the valves??

or so i've heard.

so assuming stock gasket..you could run a bigger cam than you can on other heads...or possibly a thinner gasket.

but i think your question falls under the "if you have to ask..."

you may as well check to confirm
Yes and no. Decreasing teh valve angle does increase clearance. But using a larger valve decreases it. And who's to say where the valve was hung. Could be lower than stock. You have to measure, or atleast find out if free drop is comparible to stock.




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