[DeTomaso] Brake vacuum source HELP

[grayjim at cox.net]

Collective advice needed. I installed an electric pump with a reservoir 
can but also left the engine vacuum t'd in for safety. Yes I have 2 
check valves but I can't get the setup to work any better than my stock 
arrangement. Anyone have a diagram as to how all that should be plumbed 
for efficiency. I feel I've got something wrong.

Thanks in advance

Jim Gray


On Thu, Jul 2, 2015 at 1:31 PM, Sean Korb wrote:

> The EV crowd has this problem as well.  Here is a solution that 
> suggests it
> is quieter:
> http://www.evsource.com/tls_braking_system.php
>
> Maybe you can pull a pump off a Nissan Leaf, Fiat EV, Chevy Volt or 
> another
> vehicle of that ilk.  They're as libel to show up in junk yards as any
> limited production vehicle.
>
> sean
>
> On Thu, Jul 2, 2015 at 12:51 PM, Mike Drew via DeTomaso 
> <detomaso at poca.com>
> wrote:
>
>>    In a message dated 7/2/15 5 23 23, npdrs at maui.net writes:
>>
>>      Hello, I am just having new engine installed into my '71 and 
>> will no
>>      longer
>>      have a reliable source of vacuum available for the brake 
>> booster.
>>      Could someone please recommend a proven electric vacuum pump 
>> setup
>>      and where
>>      to buy it?
>>      It would be great if possible to find a source in Germany (or
>>      Europe) as the
>>      car is in Germany.
>>
>>>>> Robert--I assume the problem is that your new engine is fitted 
>>>>> with
>>    a 'race' intake manifold that has no provisions for vacuum 
>> take-off?
>>    That's the problem with such things.
>>    One solution is to have a bung welded to one of the intake 
>> runners.
>>    When I faced the same problem with my GT350, I took a different 
>> path.
>>    I fitted a Boss 302 carb spacer, which has provisions for brake 
>> vacuum,
>>    yet is very thin to provide hood clearance.
>>    I got mine here:
>>    http://www2.cougarpartscatalog.com/bossspace.html
>>    You could always just get a typical one-inch spacer, but that adds
>>    height that you don't want.  This spacer is very, very thin; the 
>> round
>>    pipe goes oval as it enters the side of the spacer, reducing 
>> height,
>>    yet the total area remains unchanged.
>>    http://image1.cougparts.com/dc/16203/1430333053_l.jpg
>>    http://image1.cougparts.com/dc/16203/1430333006_p.jpg
>>    http://image1.cougparts.com/dc/16203/1430333005_g.jpg
>>    (Those are photos of a used original, not the new repro, which is 
>> built
>>    to the same standard but obviously looks new).
>>    Note that it is somewhat fragile; if you manhandle the hose onto 
>> and
>>    off of the pipe, you'll break it.  Install the hose onto the pipe
>>    holding the pipe in your hand, then lay the spacer in position, 
>> and
>>    manhandle the other end of the hose onto the pipe under the car.
>>    Easy peasy!
>>    In answer to your actual question, I have seen a number of Pantera
>>    owners attempt to incorporate electric vacuum pumps, and every one 
>> of
>>    them was just miserable.  Those are another 'race only' part, and 
>> are
>>    deafeningly loud and create a ton of vibration.  I find them 
>> completely
>>    intolorable for a street car, plus they take up a lot of precious 
>> front
>>    trunk space.  And they are more expensive than the simple spacer 
>> shown
>>    above.
>>    Mike
>>
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>
>
> -- 
> Sean Korb spkorb at spkorb.org http://www.spkorb.org
> '65,'68 Mustangs,'68 Cougar,'78 R100/7,'60 Metro,'59 A35,'71 Pantera 
> #1382
> "The more you drive, the less intelligent you get" --Miller
> "Computers are useless.  They can only give you answers." -P. Picasso
>
>
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