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I need to modify my power steering pump to put out a lower pressure do I don't blow my turbo oil seals. but I need to know what it starts out at.

Ya some pumps run at over 2000psi so a by-pass system would be a must. Not sure how gallons per minute would be effected, I think a lot of pumps run around 1.5gpm and the turbo is using the oil as a coolant as well (unless your going with a water cooled turbo). So besides pressure gpm may need to be considered. Are the ps pump seals compatable with engine oil? Sorry more questions than answers.

Yea well my buddy is kind of a turbo god lol...hes telling me a power steering.pump will not work...

Well maybe not a ps pump but possibly another type of pump as long as you can get it driven off the engine. I was hesitant about using a ps pump as well.