427 fe crankshaft

[FWB]

if your using rods with ford journal size, there are plenty of 390 cranks out there to be had....some more info on the rest of the bottom end may yield you more info/options

[cobrabritt83]

im using scat 6.490 standard 427 fe rods

[olddog]

The 390 has the same stroke as the 427.

The 391 truck has a larger OD on the snout (where the damper goes) and will need turned down. The huge advantage is that these are steel cranks -not cast iron. Now I cannot remember for certain if all 391FT are steel, but most are, if not all.

Unless you have some rules preventing you, why not stroke it out? Cost about the same for a whole rotating assembly either way.

[DougD]

Originally Posted by olddog

The 390 has the same stroke as the 427.

The 391 truck has a larger OD on the snout (where the damper goes) and will need turned down. The huge advantage is that these are steel cranks -not cast iron. Now I cannot remember for certain if all 391FT are steel, but most are, if not all.

Unless you have some rules preventing you, why not stroke it out? Cost about the same for a whole rotating assembly either way.

Just for the record, 390 cranks are cast steel, not cast iron. The later 427 cranks were of course forged steel.

No one would doubt the benefits of building an engine with a forged steel crankshaft. But for a street engine, I don't think they're worth the extra $$$. I've never heard of someone with a broken FE crank on a street engine.

[undy]

Originally Posted by DougD;128****

Just for the record, 390 cranks are cast steel, not cast iron. The later 427 cranks were of course forged steel.

No one would doubt the benefits of building an engine with a forged steel crankshaft. But for a street engine, I don't think they're worth the extra $$$ I've never heard of someone with a broken FE crank on a street engine.

Unless it's an Eagle crank. Several have been reported here.

[TomP]

I have a forged steel 391 crank with the snout already turned down but the real 427 cranks also have hollowed out throws with plugs in the end and are crossdrilled.
I think the cast cranks are fine to around 600 hp but the steel is good for quite a bit beyond that.