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Old 09-08-2012, 03:57 PM   #1
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GT-40P heads

If I stroke my 5.0 to 331 and bore it .030 over and put GT-40P heads on it what kinda compression will I get out of it??
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Old 09-08-2012, 04:43 PM   #2
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Quote:
Originally Posted by FordRacer_51
If I stroke my 5.0 to 331 and bore it .030 over and put GT-40P heads on it what kinda compression will I get out of it??
Really depends on the pistons you go with.
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Old 09-08-2012, 04:45 PM   #3
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What should I go with?? To get higher compression
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Old 09-08-2012, 04:54 PM   #4
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From coast high. This should give you a rough idea.
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Old 09-08-2012, 05:06 PM   #5
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Thanks that helps a lot. If I ran a domed pistion could I ran an "E" cam??
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Old 09-08-2012, 05:47 PM   #6
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Quote:
Originally Posted by FordRacer_51
Thanks that helps a lot. If I ran a domed pistion could I ran an "E" cam??
More than likely, but you would need to check ptv clearance to be sure.
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Old 09-08-2012, 06:25 PM   #7
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Not to sound dumb but what's ptv?? Pistion To Valve?? And how would you do that??
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Old 09-08-2012, 06:48 PM   #8
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Quote:
Originally Posted by FordRacer_51
Not to sound dumb but what's ptv?? Pistion To Valve?? And how would you do that??
slowstangs right it needs to be checked. the procedure is in the useful stickies thread. or google. if you cant find it let us know and we can runn you through it. but you basically clay the top of the piston, bolt the heads and valve train up and turn the motor over by hand. then check the clay to see what clearance you have.

what i would do is mock up your current cam with the pistons you want. then see how much room you have to play with. but it will need to be checked again once you chose the new cam because there different variables that account for clearance.

also you maybe able to get knotched domed pistons to better help clearance.
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