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5.3 ptv clearance.

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Old Jul 8, 2015 | 05:11 AM
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Armyman2445's Avatar
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Default 5.3 ptv clearance.

I'm a late bloomer. I've held off getting on the LS wagon till now. I have read a lot and searched a lot. Im reading some conflicting things from different forums, and this is by far the most trusted forum for info.

I'm wanting to swap the dished 5.3 Pistons out for 4.8 pistons. I'm running ported 706 heads. I have a MS3 cam on the shelf. I wanted to know if the ptv clearance is good before I start looking for a set of 4.8 Pistons. I don't want to waste time and money to find out the valve is trying to make love to the piston.
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Old Jul 10, 2015 | 01:51 PM
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Originally Posted by Armyman2445
I'm a late bloomer. I've held off getting on the LS wagon till now. I have read a lot and searched a lot. Im reading some conflicting things from different forums, and this is by far the most trusted forum for info.

I'm wanting to swap the dished 5.3 Pistons out for 4.8 pistons. I'm running ported 706 heads. I have a MS3 cam on the shelf. I wanted to know if the ptv clearance is good before I start looking for a set of 4.8 Pistons. I don't want to waste time and money to find out the valve is trying to make love to the piston.
Depends on the cam lift. Keep it under .600 and you're more than safe. The flat top 5.3 and 4.8 use the same piston.
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Old Jul 10, 2015 | 06:06 PM
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I am no expert but the experts always say duration has more effect on PTV than lift.
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