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Old Mar 16, 2020 | 04:20 PM
  #16  
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Originally Posted by ADOR
LOPO or Standard Output.


S or swirl port heads, 68cc chamber that is deeper not wider, valves are longer than regular heads and suck deeper into the heads.

This is incorrect. The valves in the E6SE heads are shorter than all other SBF heads because of the deeper chambers
 
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Old Mar 17, 2020 | 12:20 AM
  #17  
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Originally Posted by baddad457
This is incorrect. The valves in the E6SE heads are shorter than all other SBF heads because of the deeper chambers
It may be, I was typing that from memory before heading to work. I was thinking they were longer for some reason. I haven't personally pulled them to compare. A quick look on rock auto shows both lengths valves under a Mustang 5.0/ and the town car 5.0. I will have to see if I packed my spec book with me to double check. (at work in Texas right now)
 
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Old Mar 17, 2020 | 10:15 AM
  #18  
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Wow, not very good numbers on these heads, looking back I should have replaced them with GT40 , GT40P or after market when rebuilding the 5.0...... bored 30 over, Magnum Comp Cam Duration 266/270, Lift .533/.533 ,LS 114, Weiand Stealth Intake W/Edelbrock 500cfm Carb, Shorty Block Hugger Headers, 2-1/2" exhaust no H pipe.
 
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Old Mar 17, 2020 | 11:44 AM
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Originally Posted by ADOR
It may be, I was typing that from memory before heading to work. I was thinking they were longer for some reason. I haven't personally pulled them to compare. A quick look on rock auto shows both lengths valves under a Mustang 5.0/ and the town car 5.0. I will have to see if I packed my spec book with me to double check. (at work in Texas right now)
No maybe about it. The valve seats are higher above the deck than all other SBF heads, and thus the valve stems are shorter as all other dimensions for the heads are the same. The Towncar, Marquis and Crown Vic's all used this head until 1991 on the 5.0. This is also the reason the pistons in 5.0's that used these heads had no valve reliefs, the valves are well clear of the pistons when fully open.
 
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Old Mar 17, 2020 | 12:25 PM
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These are the pistons used in the rebuild
 
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Old Mar 17, 2020 | 01:06 PM
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Originally Posted by moejr

These are the pistons used in the rebuild
What is the pun height (or compression height) of those pistons ?
 
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Old Mar 17, 2020 | 01:29 PM
  #22  
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Pistons are Sealed Power Speed Pro #H273CP030, spec says compression height is 1.605 & piston head volume is +8.00cc
 
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