My 5.4 Sleeper (Not Done Yet)

that 5.4 won't fit under the stock hood. you can minimize it's height with a 99+ cobra intake and adapter plates. if you use the stock intake it will sit 6" above the stock hood. adapter plates and a PI intake is ~2" higher than stock 4.6.

a cobra 'r' was 5.4 4V not 2v.

even lightning rotating assembly is weak. 04+ cranks are all steel. some are forged depending on the build sheet of the individual truck. wide parting/casting flash lines indicate forging. cracked cap 5.4 rods are good for 6000 rpm with N/A. supposedly lightning rods are good for 400 rwhp.
i know for a fact that 04+ rods are good for 425 rwhp and 5400 rpm. at least they are so far.

factory forged steel 5.4 cranks are good for 8200 rpm. so says Al Papito. i never checked mine. i forgot.

my final intake will be ~1/2" - 1" lower than my current and use the twin 57mm mark viii TB i got with the 4v.

it's a good thing you are boosting it. you would be embarrased of the 5.4 2v power otherwise.

squares98 said:

Question: Why dont people import aussie 5.4l engines? Even if it cost anf extra grand in shipping it would seem worth it.

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the aussie is essentially the same triton motor trucks have. it has an intake that fits under car hoods. same runner length and power is within 15 hp of the truck. i wanted the aussie intake at first, but aluminum has it's own drawbacks, and i modified mine for short runners anyway.