I am running a 87 stock 302.
I don't think it will last long running 8-10 pounds of boost and close to 400RWHP.
I was looking at the Ford motor sport catalog at the Sportsman block and the boss block. They rate the Sportsman block for around 450HP? Nothing on the Boss.
I looked on line at a DSS stage (stock blocks) 10 and 20 block.
How can they rate them 650+HP? With main cap support. What do you guys think? I want 500FWHP with boost.
I believe at around 700ish hp the block splits in half right down the lifter valey. Read it in a 5.0 magazine where they were experimenting on how much the stock block would take before exploding. They kept adding boost until failure. It actually lasted a few runs before it let go. Pretty impressive for a block rated at 225 hp from the factory.
At 400rwhp less than 5% of factory blocks will fail. At 500rwhp it's probably closer to 20%.
The factory crank, rods and pistons are stronger than the block itself. You don't need to upgrade anything in the shortblock until you go to a stronger block.
I think that anything pass 450rwhp could be considered risky. I'm pusing a hair over 400rwhp and I'm not planning on a failure.
-dan
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