4.0 heads ?

veshvr6 · 11-01-2009, 12:51 AM

i have a 1996 ranger wit a 4.0 i locked it up so i bought a motor out of a 1991 explorer. can i put the heads from the 96 on the 91?

**AllanD** · 11-01-2009, 09:18 AM

The late heads in an early shortblock will raise compression.

The late heads have smaller "Fast burn" (more swirl) combustion chambers
and the dish in the pistons are larger to compensate.

So while it'll all bolt together and it'll all work the compression will be higher and it'll ping on anything other than premium fuel.

For low altitude work it'll be unhappy.

IF OTOH you lived in Cheyenne or Denver you'd love it.

AD

veshvr6 · 11-02-2009, 11:07 PM

is there any power difference between the motors or any thing i should swap from my old motor to the new one

Ranger#1 · 11-03-2009, 01:29 AM

Quote:

Originally Posted by AllanD

The late heads in an early shortblock will raise compression.

The late heads have smaller "Fast burn" (more swirl) combustion chambers
and the dish in the pistons are larger to compensate.

So while it'll all bolt together and it'll all work the compression will be higher and it'll ping on anything other than premium fuel.

For low altitude work it'll be unhappy.

IF OTOH you lived in Cheyenne or Denver you'd love it.

AD

really its that bad

veshvr6 · 11-07-2009, 11:16 PM

what would it bump the compression to?

**AllanD** · 11-09-2009, 10:05 AM

The limit on your sunoco or amoco card.

AD

snoopdoggie · 11-09-2009, 11:01 AM

Do you know there are more differences between the two motors.

veshvr6 · 11-11-2009, 12:45 AM

i know there are more differences but im just trying to see what i can mix and match from the two motors. and wouldnt mind getting some extra power if possible.

igiveup · 11-11-2009, 02:53 AM

Hello

Try this one. Its answer a lot of questions for me. http://therangerstation.com/forums/s...ad.php?t=65141 .

igiveup

11-01-2009, 12:51 AM	#1
veshvr6 New Member Join Date: Sep 2009 Location: Hookstown Pa Year: 1996 Make: ford Model: ranger super cab Engine: 4.0 Class: 4X4 Used For: fourwheeling Posts: 5 Rep Power: 0 iTrader: (0)	4.0 heads ? i have a 1996 ranger wit a 4.0 i locked it up so i bought a motor out of a 1991 explorer. can i put the heads from the 96 on the 91?
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11-01-2009, 09:18 AM	#2
AllanD RBV Technical Advisor Join Date: Jun 2001 Location: East-Central Pennsylvania Year: 1987... sorta Make: Ford Model: Ranger Supercab Engine: '93 4.0 Class: 4x4 Used For: Roadtrip Warrior Posts: 7,169 Rep Power: 47 iTrader: (18)	The late heads in an early shortblock will raise compression. The late heads have smaller "Fast burn" (more swirl) combustion chambers and the dish in the pistons are larger to compensate. So while it'll all bolt together and it'll all work the compression will be higher and it'll ping on anything other than premium fuel. For low altitude work it'll be unhappy. IF OTOH you lived in Cheyenne or Denver you'd love it. AD __________________ Gun Control - A theory espoused by some monumentally stupid people; who claim to believe, against all logic and common sense, that a violent predator who ignores the laws prohibiting them from robbing, raping, kidnapping, torturing and killing their fellow human beings will obey a law telling them that they cannot own a gun.
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11-02-2009, 11:07 PM	#3
veshvr6 New Member Join Date: Sep 2009 Location: Hookstown Pa Year: 1996 Make: ford Model: ranger super cab Engine: 4.0 Class: 4X4 Used For: fourwheeling Posts: 5 Rep Power: 0 iTrader: (0)	is there any power difference between the motors or any thing i should swap from my old motor to the new one
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11-07-2009, 11:16 PM	#5
veshvr6 New Member Join Date: Sep 2009 Location: Hookstown Pa Year: 1996 Make: ford Model: ranger super cab Engine: 4.0 Class: 4X4 Used For: fourwheeling Posts: 5 Rep Power: 0 iTrader: (0)	what would it bump the compression to?
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11-09-2009, 10:05 AM	#6
AllanD RBV Technical Advisor Join Date: Jun 2001 Location: East-Central Pennsylvania Year: 1987... sorta Make: Ford Model: Ranger Supercab Engine: '93 4.0 Class: 4x4 Used For: Roadtrip Warrior Posts: 7,169 Rep Power: 47 iTrader: (18)	The limit on your sunoco or amoco card. AD __________________ Gun Control - A theory espoused by some monumentally stupid people; who claim to believe, against all logic and common sense, that a violent predator who ignores the laws prohibiting them from robbing, raping, kidnapping, torturing and killing their fellow human beings will obey a law telling them that they cannot own a gun.
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11-09-2009, 11:01 AM	#7
snoopdoggie Member Join Date: May 2008 Location: Central North Carolina Year: 1988,89,89,94,9 Make: Ford Model: Ranger Bronco II Ranger Ext. Explorer Explorer EB Engine: 2.3 2.9 2.9 4.0 4.0 Class: 2WD Street Used For: Daily Driving Posts: 474 Rep Power: 11 iTrader: (33)	Do you know there are more differences between the two motors.
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11-11-2009, 12:45 AM	#8
veshvr6 New Member Join Date: Sep 2009 Location: Hookstown Pa Year: 1996 Make: ford Model: ranger super cab Engine: 4.0 Class: 4X4 Used For: fourwheeling Posts: 5 Rep Power: 0 iTrader: (0)	i know there are more differences but im just trying to see what i can mix and match from the two motors. and wouldnt mind getting some extra power if possible.
	Tweet

11-11-2009, 02:53 AM	#9
igiveup Member Join Date: Aug 2007 Location: Edmonton Ab. Canada Posts: 428 Rep Power: 12 iTrader: (0)	Hello Try this one. Its answer a lot of questions for me. http://therangerstation.com/forums/s...ad.php?t=65141 . igiveup __________________ 2011 FX4 Ranger http://therangerstation.com/forums/s...98#post1067998 85 Honda trike 250 SX 2006 F150 4X4 quad door (tow rig)
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