quote:Originally posted by goodroc:
I agree with you and I can't stand that Pack mentality exercised by any group. Wether it is the Police or the guys with long black Boots from the south who were mingling with the regular soldiers that invaded and occupied my country from April 9th 1940. Some of them was really nasty ;-(
Anyway to get back to the subject. If installing an electrical vacuum pump some people suggest that you install a vacuum reservoir (tank). Otherwise the pump will start/stop too often. I would go to the local junkyard and pick up an empty small fire extinguisher bottle (have seen them there) and use that or perhaps just buy one build for the purpose. (not the small ones for HVAC or Power locks) And of course a vacuum sensor switch to sense the system vacuum and control the Pump. You can still take advantage of the 7" of vacuum at your manifold as initial vacuum if you remember to add an additional check valve that shuts as the system vacuum goes below 7" generated by the vacuum pump.
I will be looking for a compact quiet vacuum pump soon. I don't want to give up on the power brakes yet.
Personally I'm running with 14in-hg at idle. With this cam, that's pretty good. There is good vacuum pressure but the Webers don't generate enough volume.
Just buy a vacuum reservoir can from Summit. They are cheap and compact one gallon sizes.
My difficulty at the moment is engineering in a PCV system with the Webers off of a vacuum manifold.
There isn't enough volume of vacuum left to pressurize the brake booster. Just getting the PCV system to work means finagling with internal restrictions in the line to the pcv and loosing 2 in-hg at idle.
Problem is there are no pcv valves that close 100% at idle. They are all open a little.