402 vs 408
Thread Starter
Joined: Jun 2002
Posts: 4,281
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From: Colorado
402 vs 408 How much rwhp & rwtq would there be between the two motors( 4.00" vs 4.03" bores ) with ported 6.0L heads, 229/237/117 cam, and full bolt ons? This setup will also be used in a FI application so I would think the thicker cylinder walls of the 402 would be better. TIA 
TECH Senior Member
Joined: Nov 2001
Posts: 10,341
Likes: 1
408-409 would be just as strong.
You are talking a .03-.035 overbore on a 4.1 spaced motor. I would personally go with the 4.035 bore 4.00 inch stroke motor. (409ci)
Lots of room for overbores/hones and you can be sure everything is where you want it to be with bore roundness and spacing.
Cheers,
Chris
You are talking a .03-.035 overbore on a 4.1 spaced motor. I would personally go with the 4.035 bore 4.00 inch stroke motor. (409ci)
Lots of room for overbores/hones and you can be sure everything is where you want it to be with bore roundness and spacing.
Cheers,
Chris
