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[wildweaselmi]

After you rebuild an engine and put a high performance cam in your new rebuilt engine you may learn that you went from power brakes to manual brakes.  The big bucket that sits behind your master cylinder is a Vacuum booster and it takes vacuum created by your engine to give your brakes the power it needs to stop.  Now that you have that big cam in there, you aren't creating near the vacuum you did once.

So what's the solution?

I found two solutions..

1. You can get rid of that big bucket (vacuum booster) and replace your master cylinder with one that works from the fluid pressure generated from your power steering pump.  So as long as you have power steering you would have power brakes.  Not a bad option and it cleans up the look under your hood.

2. You can buy an electric vacuum booster.  This will keep a consistent vacuum pressure for anything on your car that requires vacuum pressure that has gone missing since your cam upgrade like many heater controls work off of vacuum pressure so it may be more wise to go with this option if you have alot of vacuum dependant items on your car.