Hydratech Hydraboost RPM Drop?

[Hydratech®]

Your flow routing appears to be correct. From what I understand, you are experiencing proper overall basic functions, though experiencing a larger than normal RPM drop when applying the brakes. This means that you are functional overall, though have an issue of either too much pump horsepower draw (due to higher than normal internal PS pump friction under load) or an engine tuning issue (where the engine is having a very hard time idling sufficiently to handle a minor load as previously discussed).

What PS fluid are you running? We have found that the PS systems run much smoother on the Royal Purple or RedLine synthetic PS fluids, along with a dose of the LubeGard additive (cuts PS pump internal friction way down on certain installations). I don't know if this is a trend or not, though we have recently observed the GM late model mini pumps (with the built on plastic reservoirs) as being problematic over the last few months - maybe there is a rash of bum pumps running through the distribution channels lately?



https://www.pro-touring.com/showthre...es-I-am-having

A normal to medium brake apply shouldn't drop engine RPM more than 50 RPM on the average musclecar. Say you take the RPM to 1500-1800 RPM - does the RPM drop seem insignificant / negligible at that point?