Quote:
Originally Posted by POWERBRAKEBOB
Vacuum boosters need vacuum, (20") and a 231 ci. motor with a turbo, cruising along in overdrive, has very little. The G.N. is a heavy fast car, and was built when G.M. was downsizing cars.
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HB systems work but lets look at some basic facts here.
Explain why the vac brake system was factory equipped on the 89 Turbo Trans Am that had the SAME turbo V6 engine and 2004r OD trans as the GN / turbo regals????
Furthermore the TTA was used as a Pace car and was definitely in overdrive doing considerable speeds while performing this task and stopped just fine.