Hi I swapped a hydroboost set-up into my car .I was wondering if there was a different psi pump that I should use with it.
There is a GM pump that was designed for the hydroboost. Don't know the numbers but you can search them out. The pressure of the pump does not mean much to the hydroboost but is critical that you match to your steering box. If you go to a remote reservoir system it is CRITICAL that you have a properly designed reservoir. Here is who I use: https://www.turnone-steering.com/ No one knows more about GM steering stuff than them.
The 1984/5 Grand Nationals/T-types had the hydroboost brake systems on them. The power steering pump on them looked like the std pump with reservoir built in. You could probably source the pump from the 84/5 GN/T-types.
Minor correction to the above... ONLY the 1984 GN/ T-types had the Hydroboost. 1985 had the problematic Powermaster brake system; It had a different reservoir than the 86/87 versions. Also MANY diesel trucks and cars back then had the Hydroboost; I have even seen Chevy gas powered Astro vans (and their GMC cousins) with Hydroboost.
Correction again...84 and early 85 GNs have hydroboost. Mid yr 85 and later got the Powermaster. I've got an early 85 GN with hydroboost.
