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RE: ur-q vacuum brake conversion

I tried to have a vaccum pump machined into the mc head but 3 machine shops 
refused to, or could not do it.  As far as I know the shape of the NA head if 
different in the combustion chamber.  Maybe that's not a big deal.  I know of 
several people who just have a supplamental vaccum tank that supplies the 
extra vaccum.  I am using this set up and I expect it to work fine.  Maybe if 
you are riding the brakes while on the gas for a couple of minutes it might 
eventually lose the vaccum.  I also would guess that you could use an electric 
vaccum pump with the tank for a really good setup.
Pat Martin
864000csq  2 1/2 cat back, H&R-Boge,advanced and loving it.  Drilled and 
stopping it.  Koenig Cobra 16x7 with AVS Intermediates, conversion in 
progress, K&N.
95 subaru legacy 
Bothell, Wa


>I use the intake vacuum to operate the brakes.  The only problem is =

the lack of power brakes under left foot braking otherwise it just as =

good as with a N/A engine.  You might want to use a cylinder head out =

of a car with a vacuum pump but you would have to change the valves =

to sodium cooled.  I know someone who has done this to get rid of the =

hydraulic system on their Ur-q.

Thanks for detailing your install. I was wondering about this. The =

porsche 951 is a turbo and it uses a vacuum booster for the brake
system so there is nothing stopping me from using it on an ur-q.
I think of my wrecked GT, the vacuum brake setup and the head with
the vacuum pump just sitting there. I see another project developing.
Ditching the ur-q hydraulic brake setup including the bomb and
hyd booster and base unit and numerous hyd lines seems like a
step in the right direction. And I have the core for my big valve hyd
head sitting right there, including the vacuum pump. And those schrick
cams are designed for the NA cars, so they have the vacuum pump
cam designed into the camshaft, right folks? Oh, this might just be
too good to pass up.
Dave Lawson