People who have read "The Ford Falcon Six Performance Handbook" know that a performance upgrade when rebuilding the 250cid
is to use pistons from the 1980-82 255cid V8. The 255cid V8 piston has a CH of 1.585" vs. 1.50" of the 200/250cid, and a piston
recess of only 1.5cc vs. 8.0cc of the 200/250cid. An advantage to using the 255cid V8 piston is to reduce the deck recess from the
stock 0.134" to 0.052", increasing compression and helping quench.
Unfortunately, 255cid V8 pistons are getting difficult to find. Another alternative piston, although not as beneficial as the 255cid V8,
is the inline four 2.5L HSC from the 1986-90 Taurus. The 2.5L piston has a CH of 1.556" with a flat top (no recesses). This piston
will reduce the deck recess to 0.078", can be found in several oversize, has the same pin diameter, and uses the same rings as the
200/250cid piston.
Hope this helps
is to use pistons from the 1980-82 255cid V8. The 255cid V8 piston has a CH of 1.585" vs. 1.50" of the 200/250cid, and a piston
recess of only 1.5cc vs. 8.0cc of the 200/250cid. An advantage to using the 255cid V8 piston is to reduce the deck recess from the
stock 0.134" to 0.052", increasing compression and helping quench.
Unfortunately, 255cid V8 pistons are getting difficult to find. Another alternative piston, although not as beneficial as the 255cid V8,
is the inline four 2.5L HSC from the 1986-90 Taurus. The 2.5L piston has a CH of 1.556" with a flat top (no recesses). This piston
will reduce the deck recess to 0.078", can be found in several oversize, has the same pin diameter, and uses the same rings as the
200/250cid piston.
Hope this helps