How to build a 4.0 OHV for power, some limits and tips...


Biggfoot44

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Vehicle Year
1994
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Ranger 2wd
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Automatic
Intresting thread .

So all years had the same CR , but the "95 up heads have 10cc smaller chambers, the difference being in the piston dish . Presumably putting later heads on an early engine would give a compression increase ? Would this be viable/ worthwhile ?
 


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GoGoggansGo

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St.John
Vehicle Year
1993
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Ford
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4.0
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Manual
Intresting thread .

So all years had the same CR , but the "95 up heads have 10cc smaller chambers, the difference being in the piston dish . Presumably putting later heads on an early engine would give a compression increase ? Would this be viable/ worthwhile ?
lol i haven’t been active on here since 2012 and got bored. The short answer would be no, the OHV 4.0 wouldn’t gain a lot by doing a head swap from the later castings. Even if the compression did go up and I’m sure it does Ford must of gone it’s not worth talking or re certifying the engine over
 


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