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Need updated PTV specs

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Old Aug 29, 2014 | 05:09 PM
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Default Need updated PTV specs
So I have .020 milled 243 heads. With ms3 cam. I'm at about 80-85 close to 90 PTV clearance. Do I need to fly cut pistons? What is the lowest someone has run clearance wise. It's gonna be a daily with moderate drag racing.

I've read people running less without problems. Thanks.
Last edited by BrainFreezE; Aug 29, 2014 at 05:15 PM.
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Old Aug 29, 2014 | 05:24 PM
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What are the exact specs on that cam and how did you measure?
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Old Aug 29, 2014 | 05:27 PM
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237/242 603/610 112. Measured using clay.
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Old Aug 29, 2014 | 06:14 PM
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.080 should be fine. Generally .080 intake and .060 exhaust are considered to be safe.
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Old Aug 29, 2014 | 06:35 PM
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Originally Posted by BrainFreezE
237/242 603/610 112. Measured using clay.
What is the intake centerline on that cam?
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Old Aug 29, 2014 | 07:11 PM
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Originally Posted by speedtigger
What is the intake centerline on that cam?
not sure going to have to look at the spec sheet when I get a chance.
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Old Aug 30, 2014 | 08:13 AM
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I've been running 90/70 for a couple of years now with no issues. Valve control is critical, and stay off the limiter if at all possible.
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Old Aug 30, 2014 | 09:23 AM
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Originally Posted by 01ssreda4
I've been running 90/70 for a couple of years now with no issues. Valve control is critical, and stay off the limiter if at all possible.
lol so no power shifting. I think I can live with that.
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Old Aug 30, 2014 | 11:56 AM
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A lot of guys run a lot less clearance than that. The T-Rex cam has about half of that LOL.
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Old Aug 30, 2014 | 02:32 PM
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Originally Posted by speedtigger
A lot of guys run a lot less clearance than that. The T-Rex cam has about half of that LOL.
even if I'm spraying a 100 shot I should be fine?
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Old Aug 30, 2014 | 02:56 PM
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Hey, I never said anything was fine LOL. Just noting that they do it.

PtoV is not an issue with running nitrous. Unless you have no rev limiter. LOL
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