![]() The additional air flow might increase idle speed, or the weaker fuel mixture might make the engine stumble or stall (from idle speed). There are a few different possible failure modes for the booster unit.ġ.) If the rubber diaphragm would crack it can lose its boost capability, usually just reverting to manual brake mode.Ģ.) A split diaphragm will also be a vacuum leak into the intake manifold, which will make the intake fuel mixture go lean, especially at low engine speed. The brake booster is one additional part that introduces an additional possible mode of failure, so it may reduce the overall reliability of the car while increasing service requirements. Just be aware the many of the pictures on following pages show the booster mounted in what would be incorrect orientation according to these instructions.Īnother consideration is a matter of reliability. I don't know if this applies to a remote booster from a different manufacturer. This is likely to be necessary to assure proper bleeding of the unit to expel air from the fluid circuit, and it may be unique to the remote booster. It also calls for rotational orientation within 60 degrees of vertical, not sideways. It wants to be situated at an angle slightly nose up (25 to 45 degrees), not level. Installation instructions (266-KB pdf document) for the Delphi/Lockheed brake booster being sold by Moss Motors USA calls for a specific orientation for the booster unit. It uses fluid only from the original master cylinder reservoir, so no additional reservoir is required.Ī word of caution here. ![]() It is installed downstream from the master cylinder, using fluid pressure output from the master cylinder to trigger the power boost function. This does not connect directly to the brake pedal. The most common type of booster unit used for the MGA is the remote vacuum powered booster. So the brake booster is a matter of personal choice, if you would like to reduce pedal force. You can lock up the wheels at any speed, as long as the brakes are in good operating condition and not overheated. MGA brakes are particularly good with either drum brakes or disc brakes. It only reduces the pedal force required for operation, and it also reduces tactile feedback (making the pedal feel a little spongy). Keep in mind that a brake booster does nothing to improve the stopping ability of the brakes on the MGA. To UPGRADE, or Not To Upgrade? Power Booster - BT-200Bįirst things first. To UPGRADE, or Not To Upgrade? Power Booster The MGA With An Attitude
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