The phrase "up to" is frequently encountered in advertising. If you really think about it, this is actually saying that this is the very most it will do; in other words, it won't put out over 340 horsepower. How much can you expect? Who knows, it could be from zero to 340 BHP; you only have their assurance that it will not be over 340 BHP. Reassuring, isn't it?I have a Ford Motorsports "X-302" crate motor in my Cobra. They claimed it could make "up to" 340 hp in the sales materials. That would be "engine horsepower" not the rear wheel variety. On the chassis dyno when getting the EFI tuned, it actually made 290 hp at the rear wheels. This particular engine isn't sold anymore but, but a newer variation is ( https://performanceparts.ford.com/part/M-6007-X2302E ) that's still rated at 340 hp and it's specs should give you a decent idea for how Ford went about it for a crate engine.
Only by those who lack the talent to build or pay for the exhaust system.Based on this article, why use the 302. Is the 351W dimensionally 'OUT' in a 40 chassis at 1" wider? Thoughts welcomed:
Small Block Ford Reality
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