I haven't done any of this stuff, just repeating what I've read: The stock pump on the turbo versions will flow enough fuel to make 150-160 horsepower with the rack limiter removed. You will need greater than stock boost to burn this much fuel without melting things, at which time an intercooler is highly advisable. If you spend the money for bigger pump elements, a big turbo, and a big intercooler, I've heard that stock internals can take 450-500 horsepower before stuff starts breaking. Unless you're made of money, I would suggest doing a lot of research before you start trying to make big power.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.