361/391
#2
#3
I have read that they can go to 4.13 and then be bored as far as a 428 can be bored. But I may have been dreaming.
#5
Drill bit test:
Cylinder Block | Mustang 428 Cobra Jet Registry
The pertinent passage:
"Measuring the gap between cylinders using a drill bit is the easiest way to determine whether your block is capable of supporting 428-sized cylinders. It is presently thought that if the shank of a 15/64" drill bit will NOT fit between the cylinders at any reachable spot in the six core holes, the cylinder will likely handle a 428 bore, core shift permitting....."
More discussion:
332-428 Ford FE Engine Forum: Cylinder wall thickness drill bit test interesting.....-----
and again:
332-428 Ford FE Engine Forum: 391 FT block to a 427 bore sonic #'s look good
The way to big cubes is the stroker way. Better to have a 4.080 bore with strong walls and a long stroke than paper thin walls with any stroke.
Cylinder Block | Mustang 428 Cobra Jet Registry
The pertinent passage:
"Measuring the gap between cylinders using a drill bit is the easiest way to determine whether your block is capable of supporting 428-sized cylinders. It is presently thought that if the shank of a 15/64" drill bit will NOT fit between the cylinders at any reachable spot in the six core holes, the cylinder will likely handle a 428 bore, core shift permitting....."
More discussion:
332-428 Ford FE Engine Forum: Cylinder wall thickness drill bit test interesting.....-----
and again:
332-428 Ford FE Engine Forum: 391 FT block to a 427 bore sonic #'s look good
The way to big cubes is the stroker way. Better to have a 4.080 bore with strong walls and a long stroke than paper thin walls with any stroke.
#6
#7
The 351/391's did, but the 359/389 did not. Same engine family, different cranks. And forget about using the steel crank, for the cost to prep it to use in a HP application, you can buy a stroker crank and make far more power. Cast FE cranks were never noted for breaking, there's no need for a steel crank for 99% of applications in an FE
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