It's a brake system that gets rid of the booster I place of a hydraulically actuated pump that is fed from the the power steering pump. Mostly used on low to no vacuum braking situations. ------------------ 86 SE Convertible 3800sc 4t65e HD(2002), Gen V, 3.5 pulley, SD headers
[This message has been edited by Tweeder (edited 10-08-2014).]
Originally posted by Tweeder: Mostly used on low to no vacuum braking situations.
Originally posted by TK: And lots of GM turbo applications and especially the turbo diesel engines like the Duramax.
Many cars w/o turbo etc uses this. hydro booster is small and designers can use boost pressure as part of ABS system, auto braking, etc. Some new cars does, or will use in near future, electronic brake boost for above reasons and more.
Converting Fiero vacuum boost to use either? Even if you can, likely a bad plan. Anything goes wrong could cause big problem. If brake boost fails many won't be able to stop in even 2x normal stopping distance.
Note that Vac boost can fail w/o being totally dead. Common issues are Leaking or block vacuum line/filter, one of two diaphragms is dead, control valve problem, vac check valve bad or full of crap.
------------------ Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should. (Jurassic Park)