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Generation III Internal Engine
PTV clearance question

Generation III Internal Engine 1997-2006 LS1 | LS6

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PTV clearance question

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Jan 11, 2012 | 09:39 PM

#1

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From: philadelphia

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PTV clearance question

Just picked up a used cam its a Bullet 234/238 .650/.650 w/ 112 lsa. Im very concerned about the ptv clearance. I plan on running the cam with my ported 241 heads, I know if I deck the heads ill be playing with fire but if I keep the stock deck height and stock head gaskets should I still have enough clearance without having to fly cut the pistons?

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Jan 12, 2012 | 12:15 AM

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3rdCoastPowerSports

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From: Loony Bin

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i have the same duration @ .050" 234/238 cam in my car with ported 241's,,, When i measured i had .102" PTV clearance intake and .110" PTV clearance exhaust. min should not be less than .080" intake and .100" exhaust... you should be good to go.

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Jan 12, 2012 | 02:14 AM

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Nobody can tell you for sure. Every engine is different. I would check it to be sure, if you don't and crash the valves, that's your own fault.

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Jan 12, 2012 | 10:11 AM

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thanks 3rdcoast, ill prolly clay a piston just to be sure when it goes in

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Jan 13, 2012 | 05:33 PM

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From: Fort Wayne, IN

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Quote:

Originally Posted by jtaylor16

thanks 3rdcoast, ill prolly clay a piston just to be sure when it goes in

Good answer and smart idea.

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080, 234238, 241, 650650, bullet, cams, clearance, head, ls1, minimium, minium, ptv

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