I'm told the stock pump can push enough fuel to make an extra 25 hp over stock with the rack limiter removed. Check in the diesel performance section for details. 25 more hp will be enough to notice, but still not really a lot. Pump mods with bigger elements or alternate fueling (such as propane) are needed for more 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 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.