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polizei polizei is offline
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Join Date: May 2007
Location: Collegeville, PA
Posts: 1,369
Faster Acceleration after fixing brake booster... I'm crazy, right?

I've had my '87 Carrera for 7 years now. It's the only Porsche I've owned, and I've always thought that brakes required a lot of foot pressure to lock up the wheels. But, over the course of 7 years it became old hat to me.

A few weeks ago I had my p-car in the shop for its annual inspection & some small maintenance. The long-time Porsche mechanic road-tested my car and told me that the brakes weren't right. He had me drive around the parking lot with him and instructed me to lock up the brakes. I did so, and it felt like business as usual to me. And he insisted that something was wrong.

I brought it back to him to fix a cracked sway bar mounts and had him take a look at the booster. He ended up installing the good replacement I found on these forums. After road testing it last night, I had 2 reactions:

1. The brakes are night & day different. I have Boxster S brakes on, and these things will rip your face off now!!

2. The car feels noticeably quicker.

Yes, I very well could be crazy. The mechanic explained that the old booster had a vacuum leak... It makes sense to me that a vacuum leak would impact horsepower as it's robbing air from the engine.

Has anyone else experienced this? Would you think a vacuum leak at the booster could be significant enough to notice a change in acceleration?
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Andy - 1987 911 Carrera Coupe
Old 05-15-2014, 05:32 AM
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