Re: 2.2 5cyl. High RPM vaccume pump

[Huw Powell <audi@mediaone.net>]

> Hey guys - I have the proceedure for removing the rod from the high-rpm
> vaccume pump on my GT, since it's making a lot of noise.  My mechanic says
> that it makes no difference.  However, since the car is subjected to
> high-rpms on a fairly regular basis,  and in some high rpm situations that
> car is under extremely hard braking, I don't want to lose any breaking
> ability.  Make sense?
> 
> Anyone know difinitivly if it makes a difference (other than sound)

Don't do it.  I'm down to one vacuum connection on the manifold for my
82 and nothing else for the brake boost.  Fine for the street, but I
only use one pedal at a time with my right foot.

Was just out pretending to bed in some pads and power discs, tried the
driving against the brakes bit and a few pumps with the engine over 3k
results in a rock solid pedal and no assist.  Like just 3 or four pedal
presses, not nailing it or anything.

And when the assist is gone, it takes a lot of effort to get any
braking.

You're racing, you need the pump I think.  

(to get example of what assistless brakes are like go somewhere you have
a lot of room to act stupid in and kill the engine at a decent speed. 
then pump the brakes a few times to use the stored vacuum.  When the
pedal goes hard that's what you'll have without the pump)

-- 
Huw Powell

http://www.humanspeakers.com/audi/

82 Audi Coupe; 84 4kq; 85 Coupe GT; 73 F250