A couple of conversion questions

Huw Powell audi at humanspeakers.com
Thu Sep 22 13:25:18 EDT 2005


> Contemplating a 10VT conversion to either my QSW or a 4KQ I have 
> sitting around.   How do conversion people deal with the vacuum for
> the brake booster?  Since the 5KT utilizes a hydro boost system, and
> the QSW and 4KQ utilize vacuum assisted brakes, there's gotta be some
> accomodation.

I believe you should be fine tapping into manifold vacuum via a one-way 
valve or two, unless you plan on doing much left foot braking.  The only 
time you will lose brake boost will be when you are on-throttle, and 
even then yous hould get 2-3 good pumps of the pedal.

Any time you are off-throttle the engine will still make plenty of vacuum.

Just make sure the vacuum lines, at least as far as the one-way valve, 
are up to handling the overpressure.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/


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