explorer 5.0 question - MustangForums.com


5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 03-07-2007, 03:27 AM   #1  
ovalracer98
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Default explorer 5.0 question

hello, im new to the forums and just recently purchased a89' lx and just picked upa complete 5.0 out of a 99' explorer with gt40p heads with 80k on it and planned on just swapping the heads and intake over onthe 5.0 HO in the stang right now.I know that swapping the"p" heads on my 5.0HO block will give me around 9.5:1 CR.
My question is, what is the compression ratio of the explorer 5.0 with gt40p heads that i picked up? If it is around 9:1 or 9.5:1 then i will just use the explorer motor and just swap the necessary parts off the 5.0 HO since my 5.0HO is pretty tired. Thanks for the help...
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Old 03-07-2007, 03:32 AM   #2  
PX429
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Default RE: explorer 5.0 question

you confused me on a couple of things.

I recommend to just use the whole motor from the explorer. don't remove the heads and intake, but do install a new cam.
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Old 03-07-2007, 03:34 AM   #3  
ovalracer98
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Default RE: explorer 5.0 question

yes, thats what i was planning on doing but was wondering what the CR was on the explorer gt40p motor since i wanta CRaround 9:1- 9.5:1.
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Old 03-07-2007, 03:36 AM   #4  
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Default RE: explorer 5.0 question

No actually it's lower then that. I can't tell you off the top of my head, but google can
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Old 03-07-2007, 03:37 AM   #5  
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Default RE: explorer 5.0 question

By the way you understand that the heads are lowering the compression, not the motor itself, right?
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Old 03-07-2007, 03:39 AM   #6  
ovalracer98
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Default RE: explorer 5.0 question

I thought that i read somewhere that the explorer 5.0 with regular gt40 heads with 64cc chambers netted around a 8.8:1 CR so i thought that with 59-60cc chambers(gt40p) it would be slightly over 9:1..... I guess a way to answer all of this would be to see if the explorer motor are running a lower compression piston vs the 5.0HO, if i can find that out i will be set. thanks for the advise.....
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Old 03-07-2007, 04:03 AM   #7  
ovalracer98
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Default RE: explorer 5.0 question

Found this, does this sound correct? thanks guys for the help!

99' 5.0L OHV V8

Displacement (liters/cubic inches) 5.0/302
Bore X Stroke 4.00 X 3.00
Compression [/b]Ratio[/b] 9.051
Horsepower (SAE net) 215 @ 4,200 rpm
Torque, lbs./ft. 288 @ 3,300 rpm

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