Originally Posted by ARCOgraphite
... The Famed EJ253 had a 1.5" crank throw** and small block V8 302 Ford (or Chevy) sized bore of ~ 4" making that engine real revver when you got over 4500 rpm. ...
So yes it was way oversquare. ...
** 1.5" x 2 = 3.0 in. stroke
That's a 0.75 stroke/bore ratio. A 1974 Subaru had 60mm stroke and 85mm bore, yielding a more "way oversquare" 0.706 ratio. (My '72 had a 82mm bore and the same stroke.) Some Fiats of that era had extreme oversquare proportions, too.
Somehow I doubt Subaru ever specified bore and stroke in inches, so I'm not sure about your numbers. The 0.75 ratio at least applies for the 302.
... The Famed EJ253 had a 1.5" crank throw** and small block V8 302 Ford (or Chevy) sized bore of ~ 4" making that engine real revver when you got over 4500 rpm. ...
So yes it was way oversquare. ...
** 1.5" x 2 = 3.0 in. stroke
That's a 0.75 stroke/bore ratio. A 1974 Subaru had 60mm stroke and 85mm bore, yielding a more "way oversquare" 0.706 ratio. (My '72 had a 82mm bore and the same stroke.) Some Fiats of that era had extreme oversquare proportions, too.
Somehow I doubt Subaru ever specified bore and stroke in inches, so I'm not sure about your numbers. The 0.75 ratio at least applies for the 302.
