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Old 12/27/2007, 06:50 PM   #1
Mosesatm's Avatar

Location: Spokane, Washington
Joined: Jan 05
Posts: 7,746

302 4V Heads on a 289 2V

It's my understanding that the 1968 302 4V heads are identical to the 1968 289 2V heads except they have smaller combusion chambers.

A smaller combustion chamber creates higher compression and thus creates more horsepower. Pretty simple so far.

Now for the part that confuses me;
Since the higher compression should create a more powerful explosion it seems that those heads would be more efficient than the lower compression 2V heads. With that in mind would the 302 4V heads also increase MPGs? More horsepower AND better mileage!

Any thoughts or experiences with this idea?
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