HICKL Posted January 26, 2007 Share Posted January 26, 2007 The Holley dp 750 I am using has one big vacuum port in the back. My performer RPM has a hole in the # 6 or 8 runner for vacuum but I can't get to it because the carb is in the way. I need a vacuum source for the power brakes and for my pcv vent. What am I supposed to do? Can you use a "T" and pull both from the same source?? Quote Link to comment Share on other sites More sharing options...
naviathan Posted January 26, 2007 Share Posted January 26, 2007 Depends on the size of the vacuum source. The brakes will need a large port. If nothing else you can always drill, tap and make another vacuum port on there. Quote Link to comment Share on other sites More sharing options...
jbk240z Posted January 27, 2007 Share Posted January 27, 2007 Maybe you can use one of those short 90 degree brass fittings installed into the intake runner for a second source. Good luck. Quote Link to comment Share on other sites More sharing options...
Paz8 Posted January 27, 2007 Share Posted January 27, 2007 I used a tee fitting off the back of the Holley carb went to the brake booster and the pvc valve, use a short piece of hose (think it's 3/8 in.) to the carb, then the tee facing left and right, run to the booster, don't forget to use a check valve in front of the booster, then run the other way to the valve cover and pvc valve. Set up works perfect and looks good. Quote Link to comment Share on other sites More sharing options...
dr_hunt Posted January 27, 2007 Share Posted January 27, 2007 A tee will be fine. Or, you could do crankcase evac system into the exhaust and just run PB off the carb. Quote Link to comment Share on other sites More sharing options...
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