Anyone running an ELECTRIC motor vacuum pump to boost crankcase vacuum?

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  1. biomedtechguy

    biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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    I have a Wraptor serpentine single belt system and I don't want to eliminate the power steering pump or any other accessories. I may want a crankcase vacuum pump for all of the benefits that brings.
    I have evac tube nipples on my TTi headers, so evac tubes are an option.
    Has anyone used an electric motor vacuum pump for the purpose of boosting crankcase/PCV system vacuum? I have manual brakes and I'm keeping them manual, so brake boost is not a factor.
    Screenshot_20191011-174704_Chrome.jpg
     
  2. vance.dykes

    vance.dykes Well-Known Member

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    why do you need more crankcase vacuum ? or what do you hope to gain ?
     
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    • biomedtechguy

      biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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      I know a guy running a 505 and a vacuum pump. I'm driving so I'll say there are performance and longevity gains in low vacuum engines by adding a vacuum pump.
       
    • vintage chromoly

      vintage chromoly FBBO Gold Member FBBO Gold Member

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      Dry sump it.
       
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      • vance.dykes

        vance.dykes Well-Known Member

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        i have seen them used in pro stock and not to help longevity. and they were belt driven.
         
      • biomedtechguy

        biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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        Thanks. I have seen the belt driven.
        May not be possible w/Wraptor.
        There are electric motor vacuum pumps.
        Looking to get info from anyone who has used one for crankcase vacuum.
        Also opinions on evac tube setup for mostly street driving.
         
      • vance.dykes

        vance.dykes Well-Known Member

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        OK so the belt driver vacuum pumps were air pumps for emissions converted to use as a vacuum pump . now if you look at a 1995 ss impala that used a ele a.i.r pump that can be used as a vacuum pump and is used to seal the rings for a 1 % h. p horse power increase. the tubs on your headers works at high r.p.m,s to remove blow buy gasses they dont work on the street. the p.c.v valve was used to stop crank expositions due to blow buy gasses [unburned fuel ]
         
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        • biomedtechguy

          biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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          I have a M/E Wagner PCV valve, and it's tunable, and the absolute best, and well worth the investment.
          I was just thinking about if I needed or wanted a vacuum pump, what could I do now that I am committed to the Wraptor single belt serpentine tensioned system.
          I think the topic is a good one for discussion, and this forum is a wealth of experience and information and opinions.
          I would hope my next engine has enough vacuum to have a good crankcase ventilation flow. I'm not concerned, at all, about vacuum for brakes because I have and I prefer my manual brakes.
          It seems like an electric motor vacuum pump could be an option, and I was looking for anyone who may have 1st or 2nd hand experience with this. I am also interested in experience and opinions about adding a vacuum pump for performance and to help prevent impurities and fuel deposits from building up in the crankcase and throughout the engine. A PCV system that functions well definitely helps keep an engine clean, leading to longevity.
           
        • vance.dykes

          vance.dykes Well-Known Member

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          i agree with the p.c.v valve you have and it is the best for a higher lift camshaft. you can use a valve cover breather to the air cleaner that will help keep the fumes from the engine in-addiction to the auj, p.c.v. valve and that would and should be enough. the a.i.r pump and the a.i.r valve are more for all out racing as the oil is changed after every race that is the way i did it and watch dart i.e Richard Masken do it.
           
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          • Hemirunner

            Hemirunner Well-Known Member

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            You don’t need this on a street car at your power level. It’s going to lighten your wallet by a couple of grand for nothing
             
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            • 68 HEMI GTS

              68 HEMI GTS Well-Known Member

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              couldn’t agree more
               
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              • jamie

                jamie Well-Known Member

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                I think the pump would run constantly and would not last long.
                 
              • biomedtechguy

                biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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                They have an adjustable screw that sets the minimum vacuum point to kick on, and it shuts off at the higher vacuum level that it is set to. Still, you may be right.
                I'm not going to worry about it for now, but I appreciate all the replies.
                What are the reasons why an evac tube system could be used?
                Benefits?
                Disadvantages?
                Concerns?
                 
              • 68 HEMI GTS

                68 HEMI GTS Well-Known Member

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                the evac systems don’t work all that good on a street car with exhaust. They’re suited for a race car. I’ve ran them on a few different cars including my dart. I will probably convert that to PCV when it goes back together. I’m more concerned about keeping the inside of the engine clean.
                 
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                • AJ/FormS

                  AJ/FormS Well-Known Member

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                  I tested the Crankcase Evacuators on my daily-driven 68 Barracuda,367/A833/3.55s, in addition to the PCV system. And I can tell you that, the way I drive, the two of them kept my mufflers well-oiled. They worked too great! for me. To properly use them, I would have needed to figure out a better pick-up point or some separators. They are now on the shelf with all the other things I tried but that didn't work out for me.

                  You shouldda been at the grass rally-cross I entered; 105 seconds of second-gear off the rev limiter. I had so much fun.
                  And then, and then; this oil cloud followed me into the pits, and it was all issuing from my tailpipes. For about a minute, my underwear was a lil tight, but it was just the E-vacs. I disabled them for the ride home, about 40 minutes, and after a while the smoking quit, and I guess the mufflers were dried out. lol.
                  So If you decide to use them; I highly recommend to install them somewhere else than in the valve covers,lol, unless yur just gonna idle her around........
                  And if you run them in conjunction with a PCV, they will over power the PCV, and the PCV will run in reverse manner, and I know it's only a tiny orifice in there, but none the less, some A/F charge is gonna be getting into the CC, unless you install a check valve in the line.
                  Truth be told, in my seat of the pants experience, on the street, I couldn't tell whether they were working or not, except by the smoke,which was slightly bluer than the tiresmoke, and had a different aroma.
                   
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                  • biomedtechguy

                    biomedtechguy Accelerati Rapidus Maximus FBBO Gold Member

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                    I have to say, that is a very entertaining way of telling that story.
                    :lol:
                    I do have electronic cutouts, and a 3" exhaust system all the way out the back, and a really well designed X pipe crossover, so I don't think that there is a big difference in power with the cutouts open vs closed. Having said that, I could only run the evac tube system when I ran open headers if need be.
                    Even with the outstanding M/E Wagner PCV valve I have, that has been set at "max evac" open orifice mode since I installed it rather than having tuned it to the vacuum level my engine produces, I still get a very little bit of oil out the breather. I may need a better seal at the grommet where the PCV valve goes into the valve cover. It could be that I am getting some pressurization of the crankcase from blow by or worn rings? I don't have smoke in the exhaust, but I don't know how "worn" the engine is. I know how I drive it :steering::bananadance::realcrazy: ...
                    I don't see any definite signs of an engine in trouble, and my oil pressure is rock solid.
                    My point is, I have learned how vitally important proper crankcase vacuum and gas circulation/evacuation is, that all PCV valves are NOT equal, and they are critically important, and I just want to know that I have done all I can to ensure that. I'm hoping the stroker motor I build will not have any reason to run evac tubes.
                     
                  • sjmedine

                    sjmedine Member

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                    Running an electric vacuum pump on my 69 RR 383 auto because of vacuum assist brakes, it
                    really does helps braking. It didn't cost an arm and leg but makes a little noise because it runs all the time. Jegs has several different brands. It has a mild cam so vacuum was the issue for
                    brakes not working properly. Hope this helps.
                     
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