[DeTomaso] Vacuum to the Brake Booster

[B. Seib]

I believe the brake booster check valve is inside the metal banjo fitting on
the stock booster? At least it is on the ones I've seen. This would be a
good thing to check first.

As far as losing vacuum at an idle with lumpy cams, I've been tossing around
the idea of installing a vacuum reservoir tank in the engine bay. This is
quite common in other cars. It would need a check valve between it and the
intake port. This would store vacuum when present on the over-run and give
it back at idle if required. I have 12 inches at 1000RPM, so I'm going to
see if I can live with that.

Barry


----------------------------------------------------------------------------
----
Mon Oct 17 22:56:54 CDT 2011
Michael Becker mikebecker at cox.net wrote:

Hi Gang,
What sort of vacuum level should I expect to read on the hose that feeds the
Brake Master resevior?  I am having some serious brake fade at low rpm's.  I
have to rev the engine to get the brakes to respond.  They will work while
driving, but while coasting, the power brakes seem to just fade away.  If I
tap the throttle, I get them back.  It's very unconfortable.  I was thinking
perhaps I have a vacuum leak in the trans-atlantic pipeline that runs from
the intake manifold to the booster.  Am I barking up the wrong tree?  Could
this just be a bad booster/resevior?  I have a high lift cam and have always
noticed that when the car is idling really slow, it feels like there is no
power assist.
Mike