Originally Posted by CobraTom
I have a Cobra replica with a 2003 verison of Ford's 460 535hp crate engine ("cobra jet" heads, not "super cobra jet")...#1 rod bearing is toast.
Since I have it apart...I was considering:
Forged 429 crank (yes, de-stroke it)
Good rods and pistons
Solid roller cam that will let it make max HP at about 6,800-7,000
Now my delimma(s):
A. I can't seem to find a forged 429 crank.
B. I saw the post about identifying numbers and am now worried that a 429 crank will not work in this block??? I was under the impression that they were interchangeable???
Have any of you guys gone this route? I like a higher revving engine and the car only weighs 2,300 lbs, wet. I can give up some of the torque for some HP at higher rpms, which would be more fun to me.
Since I don't want to invest $2k-$3k in a billet crank, am I wasting my time?
Your thoughts would be greatly appreciated.
With the Cobra Jet heads you have, getting a 460 to spin to your desired 7000 rpm is easy.
Furthermore, destroking the motor to a 429 will not only make the engine more of a dog with CJ heads (compared to the 460), but you will also need to rev to 7000 and up
to make any great power. Again, destroking these motors will reduce power in the usable rpm range and further, destroking with those heads is a mistake.
The 429 and 460 cast crankshafts are plenty strong for the motor you want to build, but replacing the rods (with some that are superior to those that came in your specific motor) would be good insurance. It will be necessary to clearance the rod and main bearings for your applicaton.
You don't even need a roller cam to attain what you wish, you simply need a little detail work on the ports of your CJ heads and the right cam for the job.
Finally, I'll bet that you have a D9TE-AB block, and if this is true then a 429 crankshaft will not fit
into that block unless the block is modified.