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Discussion Starter #1
The 42lb/hr or 441 cc/min FMS injectors I have, what power figure do you think these injectors could sustain in a turbo setup XF (using a rising reg of course), what's the max boost you would consider running in conjuction with this setup, which will have a high flow fuel pump.
 

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hi fordmanxf,
each of your 440 cc injectors will roughly support 60-65hp per cylinder. So, with one injector per cylinder you could make around 360hp.
A for how much boost you can run, i think that is more a factor of compression, how good your engine components are and lastly, the fuel system.
My off handed answer would be somewhere aroung 15lbs boost with 10:1 compression, on premium98 pump fuel.

cheers
gus351
 

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Two SC 61's = trouble
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36's on sohc will make 300 rwkw at 50 Lb initial fuel pressure..
42's would make enough to blow whatever std transmission you put behind it..Assuming XF's compression is around 8.8 to 1 ?? 20 to 25 Lb easy but check your turbo map where its efficiancy levels are...Assuming you have map, ecu that can tune to this level..Btw a rising rate reg is not required with 42's.Just one that's boost sensitive so fuel pressure is always 40 Lb [or whatever you set it at] above boost..Sard is a good brand reg....
 

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Discussion Starter #4
OK thanks guys, engines good, compression is 8:2:1. What type of fuel pump would I go to match those injector flow rates?
 

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Two SC 61's = trouble
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Cheapest and easiest would be fitting an intank Walbro 255 pump, replacing the std pump..Or if you are realy keen fit a surge tank and use std pump to that and fit an 044 Bosch inline pump from surge tank...
 

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I'm running 42lb Lucas injectors with a 450hp Bosch motorsport pump and Malpassi rising rate reg on my T4 turbo'd XF. This has supported a peak boost figure of 24lb on stock (8.2:1) compression. Still hasn't been dyno'd but so far I haven't had any fuel drama's with this combo.
 

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Discussion Starter #8
ah sounds good xcfalcon351, what sort of power figure do you think your pulling, and how long before you get the beast dyno'd?
 

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the xf is mine didnt have a user at time of post should be between 300- 400 hp have moved to karratha so still waiting to dyno heres a couple of pics
 

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no have water sprays on the intercooler good for dropping about 4deg but no injection.intake air temp sits around 4o deg max depending on outside temp
 
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