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Chevy volt ibooster4/2/2023 ![]() I was even considering using the breakaway function of the Brake Buddy Stealth as a sort of redneck mico-lock, but I'm increasingly seeing how that might be a bad idea. I plan to wire it differently than the instructions say so I can use the vacuum pump at other random times, such as to supplement the vacuum during near-constant WOT for more accurate cruise control and to power brakes and other items if I want to use them without firing the engine. The kit includes a really crappy one, so I was looking for a better one, one that can run with a higher duty cycle and a deeper vacuum. I plan to install the Brake Buddy Stealth at some point, which requires a vacuum pump. This was kind of just a rabbit hole I went down. ![]() But it could be an interesting alternative for a few cases. ![]() Not arguing that this should be used to replace all hydroboost or vacuum brake applications. If that fails or a fuse blows, you have a dozen, maybe a few more, stops before you lose pressure and end up with manual brakes. So unlike hydroboost, it would be useful for flat towing.Ī big unknown would be the reliability of the included pump. One distinct advantage there is that the electric booster brakes can be used at any time, even with the engine off and no auxiliary vacuum pump. It would eliminate the need for a vacuum source for factory brakes and/or a need for power steering pressure for hydroboost. So based on that information, the electric booster would be a moderate upgrade over the vacuum booster, but not quite to the level of the hydroboost. The Vanco hydroboost kit claims a max pressure of 2400-2700 PSI, with a master cylinder diameter of 1-1/8 for the 1/2-ton and 3/4-ton kits, and 1-5/16 for the 1-ton kits. (The disadvantage of the larger cylinder is that less pressure is available when the brakes are applied without boost.) The kit claims a max PSI of 2000 psi.Īccording to Vanco PBS, a stock vacuum booster puts out 1000-1100 psi of brake line pressure (assuming dual diaphragm). The kit claims a master cylinder diameter of 1-3/16”, which I suspect would work with most big brake kits, given that the stock TJ cylinder is 15/16”. The difference is it uses electric, rather than power steering pump pressure, to power. Like hydroboost, the kit replaces the vacuum brake booster.
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