'1967' 440/375 HP and 440/350 HP Comparison
Paul, a stupid question if you don't mind? Not trying to throw you off track.....but I think this kinda fits in.
You said the 375 HP 440 had 10:1 compression......and I am sure that's rated correctly. Does that mean they used the "Six Pack" piston or did they get the compression from the 67 only closed chamber heads with the "standard" 440 piston? Thank you drive through.
Oh and awesome info as usual.
Ah, good question.
The 1967 '440' came thru with 10.1-1 Compression, with Flat-Top Pistons.
* Deck Clearance ..... {-.059"} down in the bore.
* Head Gasket ...........{.021"}
The 1967 '440 HP' Cylinder Heads {#2780915} were Closed-Chamber, and came from the
factory at {78 to 80 CC's}. 'NHRA' Minimum CC-level was 73.5
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The 1968 and 1969 '440' also came thru with 10.1-1 Compression, with Flat-Top Pistons.
* Deck Clearance ....... {-.027"} down in the bore.
* Head Gasket ........... {.020"}
The 1968 and 1969 '383 and 440' Cylinder Heads {#2843906} were Open-Chamber, and came
from the factory at {85 to 87 CC's}. 'NHRA' minimum CC-level was 79.5
End Result
Both '440/375 HP' engines had the same compression.
The 1967 '440' had {6.0} less CC's in the Cylinder Head Combustion Chamber, but the
Flat-Top Pistons were {-.032} further down in the Cylinder Bore than the
1968 and 1969 '440' engine.
In '1970'
The Piston Height/Depth was changed.
