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The Ps have a different spark plug angle, which is supposed to ignite the combustion chamber more efficiently, and therefore "better", however, you need particular headers or spark plug boots to deal with the increased angle of the plugs sticking out.
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" You, me, or nobody is gonna hit as hard as life. But it ain't how hard you hit; it's about how hard you can get hit, and keep moving forward. How much you can take, and keep moving forward." - Rocky Balboa
I have P's and long tube headers...I had to flip my plug wires around to clear the header tubes. When I mean flip them around, I mean the spark plug side of the wire is now on the distributor and vice versa.
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Quote:
Originally Posted by cch
bahaha 'magine there was more side bulge then Rosie O'donnel in spandex.
thank god I was broke when i wanted to throw some GT40ps on, b/c I would of been over those heads in a couple of months. Save your money and get some heads you can build on in the future, plus drop 50lbs.
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Mac CAI, 65mm TB, Explorer intake, BBK Shortys, BBK X-pipe,
Magnaflow catback, UD pullies, Timing @ 13*
Remember that the Cobra Gt40 heads had a smaller combustion chamber (62cc) than the explorer gt40's (64cc).. So if your going to use the explorer heads factor in cost for milling them down..
Where as the Gt40p heads have a 59cc combustion chamber with redesigned plug location for more efficient combustion.. And most long tube's and shorty headers will fit the p-heads with 90* plug boots..
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1991 GT with GT-40P heads, Polished typhoon upper and lower, E-cam, 1.6 rr's, Trick flow valve springs, BBK shorties, 70mm TB and EGR,70mm mass air, 190lph pump, BBK regulator (42psi) MSD wires and coil.
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IDK the difference gt40 and gt40p heads?
