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Rules Clarification - intake/exhaust valves
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TOPIC: Rules Clarification - intake/exhaust valves

Rules Clarification - intake/exhaust valves 7 years, 6 months ago #15372

  • joeblow
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I want to clarify that I MUST run 944 valves and not 951 valves? They are the same size, have no performance difference etc... Obviously the exhaust valves are sodium filled but this is for durability not performance and if anything they are heavier which is not great. Obviously you would not want to buy 951 valves because they are more expensive too.

The reason I ask is I have bought a rebuilt head that has new 951 valves in it already and I would hate to have to pull them out to put in my old ones or buy more valves.

Is this OK or is it a strict no no? Can I get a waiver?
Old Racer!

Re: Rules Clarification - intake/exhaust valves 7 years, 6 months ago #15408

  • joeblow
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Anybody have info on this?
Old Racer!

Re: Rules Clarification - intake/exhaust valves 7 years, 6 months ago #15411

  • cbuzzetti
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  • 944 Spec = The best racing on the planet
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IT is my understanding that the Turbo valves are NOT legal.
2018 NASA 944Spec National Champ
2018 NASA ST5 P2 944 Nationals COTA
2017 NASA 944Spec WSC P3
2016 NASA PTD-944 WSC P2
2015 NASA GTS1 Western Champion
2014 NASA 944Spec Western Champion
2013 NASA 944Spec So-Cal Regional Champion
2013 NASA 944Spec National P3
2010 NASA GTS-1 National Champion
2010 NASA 944Spec National P3
2010 NASA So-Cal 944Spec Regional Champion
2009 NASA 944Spec National Champion

Re: Rules Clarification - intake/exhaust valves 7 years, 6 months ago #15414

  • cbuzzetti
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  • 944 Spec = The best racing on the planet
  • Posts: 1192
Section 2.1 and section 12.1 both address the issue about non 944 normally asperated parts.
2018 NASA 944Spec National Champ
2018 NASA ST5 P2 944 Nationals COTA
2017 NASA 944Spec WSC P3
2016 NASA PTD-944 WSC P2
2015 NASA GTS1 Western Champion
2014 NASA 944Spec Western Champion
2013 NASA 944Spec So-Cal Regional Champion
2013 NASA 944Spec National P3
2010 NASA GTS-1 National Champion
2010 NASA 944Spec National P3
2010 NASA So-Cal 944Spec Regional Champion
2009 NASA 944Spec National Champion
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