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i was getting ready to spray the vette off and my pressure washer hose took a crap..bad thing is its brand new..my question is,if i go to a larger size hose will this lower the psi from the pressure washer?..its got 1/4 inch 3000 psi hose now and is was thinking of going to 5/16 3700 psi hose..
I wouldn't touch my Vette with any kind of high-pressure at all. Rinse with garden spray, wash by hand, rinse with garden spray and dry. Not counting wheels, about 15-20 minutes.
As long as you don't change nozzle size, the pressure should remain the same. I also use a pressure washer, but use one of the lower settings. Saves a ton of water.