Difference between the 1965 383/330 HP and 1966 383/325 HP. "Where's the Beef"

[440 Cuda]

Where is the 5 Horsepower difference ?

* 383/330 HP {1963 thru 1965}
* 383/325 HP {1966 and 1967}

Equal Components
* Compression Ratio
* Cylinder Heads
* Valve Size
* Carter AFB
* Intake Manifold

 

[ilm65]

Not sure if this is exact, but I recall the 383/330 had a low restriction air cleaner and different exhaust manifolds than the 383/325.

 

[YY1]

...and at 1.25% of the total, could easily be a tolerance, interpretation, operator, or more likely, advertizing issue.

Pretty sure the air filter alone could be a 1% gain.

- - - Updated - - -

BTW, there was an EXTENSIVE thread about this very topic less than a month ago.

 

[Cranky]

5 horsepower....uh, don't think that's what you wanted tho

 

[440 Cuda]

Horsepower

1963 thru 1965 > 383/330 HP cars did come thru with Dual-Point Distributors.

1966 and 1967 > 383/325 HP cars came thru with Single-Point Distributors.