[DeTomaso] brake booster vacuum Webber

gow2 at rc-tech.net gow2 at rc-tech.net
Wed Oct 3 23:05:22 EDT 2012


I am running 2 small lines "T-d" off each cyl on the Weber intake. They
"T" again in front to a larger line for brake boost. Is it common to run a
check valve?

>
> i have the CHI intake.  I just ran a 'T' off the back of the carb
> (throttle body in my case) and ran it to the PCV on the valve cover and
> also to my brake reservoir, then to the booster.  with an aggressive cam,
> I added a vacuum reservoir.  it all works fine, although repeated braking
> attempts while engine at idle, like when rolling to a stop sign in town,
> will lead to dramatically increased brake pedal effort.  probably not the
> best, although no disasters yet.  i have the same problem on my similarly
> built small block chevy.  With an aggressive cam, it probably is smartest
> to use a small vacuum pump, which could be mounted in the front trunk or
> even on the lower frame on the passenger side below the headers and the
> electronics on the firewall (i came close to doing it).  but i dont have
> enough trouble to consider it.      justin
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