After looking at all of Fords Big Block crate engines I decided to build my own engine. Heavy pistons, stock connecting rods, externally balanced engines,and heavy crankshafts, all played a role in my decision. The 514 is a great engine, but is hard to internally balance as well as get a good connecting rod length to stroke ratio. And do you really need a 4.30 stroke in a 2,700 lb car? I decided to go with a 4.39 bore and a 4.15 stroke which gives me 503 CID. I went with a custom made lightened crank, extra long H-beam rods, and custom made pistons from JE. The crank alone is almost 15lbs lighter than a 460 crank! The pistons are around 100 grams lighter than the TRW units that Ford uses in its 514. All of this helps to make an engine that is easy to internally balance. With a super light rotational assembly this engine revs like a small block.
Here are some other specs on this engine.
Ford motorsports aluminum heads(ported and flowed)
Ford Racing "Victor Jr " intake 4150 flange (port matched)
Demon racing 975 CFM carb
Custom grind solid roller cam (smaller profile than 514's)
Custom made billet aluminum
oil pan with windage tray etc.
Stud girdle
Actual independant Dyno test results on 93 octane fuel
641 HP at 6,500
593FT lbs at 4,700
7,200 redline
+550FT lbs of torque from 3,000 to 6,000 RPM
Revs so fast that I went and bought a rev limiter.
