[DeTomaso] Vacuum to the Brake Booster

[wkooiman at earthlink.net]

I switched to Wilwood masters with no booster.

I think you have a leak somewhere.  The vacuum lines were nasty on my car, and the metal line was rusted to pieces.  The booster was malfunctioning too, so rather than repairing all of the original parts, it was easier to replace with new Wilwood.

I do not miss the booster at all.  It is slightly harder to press the pedal, but they are firm and the car stops on a dime.

-----Original Message-----
>From: "B. Seib" <oldwheel at shaw.ca>
>Sent: Oct 18, 2011 5:25 PM
>To: DetomasoList <detomaso at realbig.com>, mikebecker at cox.net, grayjim at att.net, Asa Jay Laughton <asajay at asajay.com>, John Buckman <jb841 at cox.net>, ehpantera at yahoo.com, rob at dumoulins.net, "Drew, Mike" <MikeLDrew at aol.com>
>Subject: [DeTomaso]  Vacuum to the Brake Booster
>
>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
>
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