Problems putting power brakes on 67 Camaro

My brother put a brake booster on his 67 Camaro to convert to power
brakes, but the brakes are way too sensitive. the car has a high
performance engine that probably pulls much more vacuum than stock.
Could this be the problem? Is there a device to limit the vacuum to the
booster?

Thanks.

- Luther

did he use a power brake master?? there is a difference
"lcifers" > wrote in message
oups.com...
> My brother put a brake booster on his 67 Camaro to convert to power
> brakes, but the brakes are way too sensitive. the car has a high
> performance engine that probably pulls much more vacuum than stock.
> Could this be the problem? Is there a device to limit the vacuum to the
> booster?
>
> Thanks.
>
> - Luther
>

lcifers wrote:

> My brother put a brake booster on his 67 Camaro to convert to power
> brakes, but the brakes are way too sensitive. the car has a high
> performance engine that probably pulls much more vacuum than stock.
> Could this be the problem? Is there a device to limit the vacuum to the
> booster?
>
> Thanks.
>
> - Luther
>

Luther,

first of all a high performance engine generally does not pull more
vacuum than stock; a performance camshaft tends to lower vacuum at idle.
Secondly, I imagine your brother's problem is that he probably bolted
on a booster but did not change the pedal assembly; there are probably
two holes in the brake pedal (one for manual brakes and one for power)
or else he needs a pedal and maybe pushrod from a car with power brakes.
I'd talk to someone who knows old Chevys to see exactly what you need
to do.

good luck,

nate

--
replace "fly" with "com" to reply.
http://home.comcast.net/~njnagel

Nate Nagel wrote:
> lcifers wrote:
>
> > My brother put a brake booster on his 67 Camaro to convert to power
> > brakes, but the brakes are way too sensitive. the car has a high
> > performance engine that probably pulls much more vacuum than stock.
> > Could this be the problem? Is there a device to limit the vacuum to
the
> > booster?
> >
> > Thanks.
> >
> > - Luther
> >
>
> Luther,
>
> first of all a high performance engine generally does not pull more
> vacuum than stock; a performance camshaft tends to lower vacuum at
idle.
> Secondly, I imagine your brother's problem is that he probably
bolted
> on a booster but did not change the pedal assembly; there are
probably
> two holes in the brake pedal (one for manual brakes and one for
power)
> or else he needs a pedal and maybe pushrod from a car with power
brakes.
> I'd talk to someone who knows old Chevys to see exactly what you
need
> to do.
>
> good luck,
>
> nate
>
> --
> replace "fly" with "com" to reply.
> http://home.comcast.net/~njnagel

OK, thanks. He's going to check that. Yes, it does have a power master
cylinder.

Thanks.

- Luther

Is this why my 67 Plymouth losses most of its power brakes when backing it
up at low idle? It has a 318 and I did put a mild performance cam in it?
What can I do or try to correct this? If I do not keep the idle up it gets
a little hairy at times with no brakes. Not to mention dangerous!
Greg


"Nate Nagel" > wrote in message
...
> lcifers wrote:
>
>> My brother put a brake booster on his 67 Camaro to convert to power
>> brakes, but the brakes are way too sensitive. the car has a high
>> performance engine that probably pulls much more vacuum than stock.
>> Could this be the problem? Is there a device to limit the vacuum to the
>> booster?
>>
>> Thanks.
>>
>> - Luther
>>
>
> Luther,
>
> first of all a high performance engine generally does not pull more vacuum
> than stock; a performance camshaft tends to lower vacuum at idle.
> Secondly, I imagine your brother's problem is that he probably bolted on a
> booster but did not change the pedal assembly; there are probably two
> holes in the brake pedal (one for manual brakes and one for power) or else
> he needs a pedal and maybe pushrod from a car with power brakes. I'd talk
> to someone who knows old Chevys to see exactly what you need to do.
>
> good luck,
>
> nate
>
> --
> replace "fly" with "com" to reply.
> http://home.comcast.net/~njnagel

two words - vacuum accumulator

"pnsman64" > wrote in message
...
> Is this why my 67 Plymouth losses most of its power brakes when backing it
> up at low idle? It has a 318 and I did put a mild performance cam in it?
> What can I do or try to correct this? If I do not keep the idle up it
gets
> a little hairy at times with no brakes. Not to mention dangerous!
> Greg
>
>
> "Nate Nagel" > wrote in message
> ...
> > lcifers wrote:
> >
> >> My brother put a brake booster on his 67 Camaro to convert to power
> >> brakes, but the brakes are way too sensitive. the car has a high
> >> performance engine that probably pulls much more vacuum than stock.
> >> Could this be the problem? Is there a device to limit the vacuum to the
> >> booster?
> >>
> >> Thanks.
> >>
> >> - Luther
> >>
> >
> > Luther,
> >
> > first of all a high performance engine generally does not pull more
vacuum
> > than stock; a performance camshaft tends to lower vacuum at idle.
> > Secondly, I imagine your brother's problem is that he probably bolted on
a
> > booster but did not change the pedal assembly; there are probably two
> > holes in the brake pedal (one for manual brakes and one for power) or
else
> > he needs a pedal and maybe pushrod from a car with power brakes. I'd
talk
> > to someone who knows old Chevys to see exactly what you need to do.
> >
> > good luck,
> >
> > nate
> >
> > --
> > replace "fly" with "com" to reply.
> > http://home.comcast.net/~njnagel
>
>

And a check valve, of course.

good luck

nate

v8z wrote:

> two words - vacuum accumulator
>
> "pnsman64" > wrote in message
> ...
>
>>Is this why my 67 Plymouth losses most of its power brakes when backing it
>>up at low idle? It has a 318 and I did put a mild performance cam in it?
>>What can I do or try to correct this? If I do not keep the idle up it
>
> gets
>
>>a little hairy at times with no brakes. Not to mention dangerous!
>>Greg
>>
>>
>>"Nate Nagel" > wrote in message
...
>>
>>>lcifers wrote:
>>>
>>>
>>>>My brother put a brake booster on his 67 Camaro to convert to power
>>>>brakes, but the brakes are way too sensitive. the car has a high
>>>>performance engine that probably pulls much more vacuum than stock.
>>>>Could this be the problem? Is there a device to limit the vacuum to the
>>>>booster?
>>>>
>>>>Thanks.
>>>>
>>>>- Luther
>>>>
>>>
>>>Luther,
>>>
>>>first of all a high performance engine generally does not pull more
>
> vacuum
>
>>>than stock; a performance camshaft tends to lower vacuum at idle.
>>>Secondly, I imagine your brother's problem is that he probably bolted on
>
> a
>
>>>booster but did not change the pedal assembly; there are probably two
>>>holes in the brake pedal (one for manual brakes and one for power) or
>
> else
>
>>>he needs a pedal and maybe pushrod from a car with power brakes. I'd
>
> talk
>
>>>to someone who knows old Chevys to see exactly what you need to do.
>>>
>>>good luck,
>>>
>>>nate
>>>
>>>--
>>>replace "fly" with "com" to reply.
>>>http://home.comcast.net/~njnagel
>>
>>
>
>


--
replace "fly" with "com" to reply.
http://home.comcast.net/~njnagel