Author Topic: 3rd valve  (Read 3137 times)

joe105

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3rd valve
« on: July 27, 2009, 11:46:12 AM »
Just got a used 07 GT Coupe and I have a real silly question.  Can someone tell me if the 3rd valve is an intake or exhaust valve?

Thanks
Joe

Soaring

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  • Mustang: 1965 coupe 289, and 2003 Mach1
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Re: 3rd valve
« Reply #1 on: July 27, 2009, 05:11:01 PM »
Joe, on a 3 valve engine, you have one large intake valve and 2 smaller exhaust valves. 

joe105

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  • Mustang: 2007 GT Coupe Premium
  • Location: Montana
Re: 3rd valve
« Reply #2 on: July 28, 2009, 12:06:13 PM »
Thanks for your help.  I thought that might be the case, but wasn't sure....

Joe

Soaring

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  • Mustang: 1965 coupe 289, and 2003 Mach1
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  • Location: Wimberley, Texas
Re: 3rd valve
« Reply #3 on: July 28, 2009, 03:20:46 PM »
I don't really see the advantage over the two valve system, but the engineers do, so I guess it's better.  I do know that the faster you get the exhaust gas out, the more efficient the engine runs, and if the two exhaust ports get the exhaust gases out faster, then it is better.  Mine is the Mach1 engine and it has two intake and two exhaust valves per piston.  I suppose you could take that theory further and have two intake and 3 exhaust.   ;D

 

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