I think 2500 psi may be a little high if your not really turning the pump way up or trying for performance. I set mine at 2400 to 2450 which is just past the factory turbo diesel spec. I don't think I would reduce it to 2200, your just giving up better possible atomization and performance. At the least, I would set them at the top of the spectrum, which is around 2350 if I remember correctly. Right now, my timing is set at 1.00mm and starting/performance is better than it was with the stock worn out injectors and timing within factory spec. You will have to experiment with the timing as every engine is different, pump wear and other factors will contribute to how it runs too. I would start at around 1.0mm and go from there, once you set the injectors up a little higher.
Jason
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