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Prespray Temperature

Jim Davisson

Well-Known Member
Aug 23, 2016
Serving the greater Charlotte area
Real Name
James Davisson
Business Location
United States
Put an inline temp guage right before your hydroforce, it will remove all doubts about where you are really at laying down the chems. 2 bills ATM will be under 175° on a live reel that's been smoking it for a while. On a cold start don't sweat it, the hydroforce will pull chems at almost 100% until about 190°, then it boils at the cone of the venturi and it cavitates and pulls less chems. If you have a high heat machine increase the gun jet size a tick and reduce back pressure for better injection. Other tricks work as well.

It takes years of high temp use to wear out a block, the bottom of the brass nozzle inside the block wears first and needs replacement much sooner. If you use a SS nozzle you will get 3x the mileage easy. YMMV, but that's what I have seen for the most part over the years.