427 FE vs. 427 Windsor

[CobraBoy]

Interesting debate is why I frequent this website!

The smaller pistons, shorter connecting rods and lighter crankshaft of the Windsor ought to conspire to a reduced inertia, both rotational and linear (pistons, rods, etc.) compared to the FE. However, when connecting rod/stroke ratio is considered, the picture changes again! The tendancy is, I think I recall, for an engine with a longer connecting rod and a shorter stroke to prefer to rev faster, all other things being equal.

Another major factor at play here is that the larger bore of the FE allows larger valves to be accommodated. Given that the valve sizes chosen are sensible (i.e. shrouding by the cylinder wall is not significant), this ought to favour big horsepower, perhaps at the expense of a little low-end torque.

Much also depends on the design of the combustion chamber. A large, open chamber can promote detonation at compression ratios that quench chambers would allow. If you can achieve a steady, but rapid combustion, high rotational speeds can be achieved.

Haven't some articles comparing these engines appeared in the likes of Car Craft of Hot Rod in recent years? Both great magazines, but difficult to get over here in England.

I believe that the choice comes down to the particular combination you want to run. Is originality a factor? Will track time be an issue? How much do you have available in your budget? The list goes on!

As does the debate...

Personally, I'd still go for a good ole FE in a 427 Cobra. The ABSOLUTE car of my dreams, bar none!

:-] Later.

Paul