how much vacum is to much?
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how much vacum is to much?

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    Senior Member tx-19's Avatar
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    Default how much vacum is to much?

    Looking to get rid of my aerospace vacum pump.it would only pull 8 at wide open throttle. Would a moroso enhanced 3 vane be okay or is the 4 vane better?

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    steelcomp was here
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    Quote Originally Posted by tx-19 View Post
    Looking to get rid of my aerospace vacum pump.it would only pull 8 at wide open throttle. Would a moroso enhanced 3 vane be okay or is the 4 vane better?
    For a wet sump deal 11-12" is about as far as you want to go without doing a lot of prep. The 3 vane Moroso will probably get you there. They do make rebuild kits for the Aerospace pumps.
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    Senior Member tx-19's Avatar
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    I did rebuild it and it didnt get any better.i have read that those really dont pull to much more

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    steelcomp was here
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    Quote Originally Posted by tx-19 View Post
    I did rebuild it and it didnt get any better.i have read that those really dont pull to much more
    I had one on the last 565 I did and it pulled 11.3 @ 7000 with their pulleys. I've heard the inside of the cases wear and not sure if a rebuild can fix that.
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    Senior Member bp298's Avatar
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    Quote Originally Posted by tx-19 View Post
    I did rebuild it and it didnt get any better.i have read that those really dont pull to much more
    engine condition, and how well it's sealed to prevent in-leakage, will also affect it...

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    gn7
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    Quote Originally Posted by tx-19 View Post
    I did rebuild it and it didnt get any better.i have read that those really dont pull to much more
    I heard the on Aero does move a lot of air compared to the Moroso. They seem to work ok small blocks and smaller BBC.

    The Moroso 3 vane moves more air than the 4 vane, but it can't pull as deep of a depression. The 4 vane moroso is designed to be aided by a dry sump and pull a deeper depression.

    None of them work to well if your engine is a leaker



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    Distinguished Member David 519's Avatar
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    Quote Originally Posted by tx-19 View Post
    Looking to get rid of my aerospace vacum pump.it would only pull 8 at wide open throttle. Would a moroso enhanced 3 vane be okay or is the 4 vane better?
    So how much more HP or other benefit do you think you'll get with another few inches vacuum? I wouldn't change it just for that. Now the Aerospace are more a drag race kinda deal and if it's a lake boat, you may want something that might have a bit more longevity. If that's the case, check out GZ Motorsports stuff.... Personally, I run the Aerospace stuff because it's billet and shiny which is generally good for a couple tenths at CFW (less so at the track)
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    Senior Member tx-19's Avatar
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    Motor is sealed up tight.not really looking for more horsepower, its a 585 cubic inch just want it to breath right.i was reading that the aerospace pump is to small for the cubic inch

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    Quote Originally Posted by tx-19 View Post
    Motor is sealed up tight. not really looking for more horsepower, its a 585 cubic inch just want it to breath right. i was reading that the aerospace pump is to small for the cubic inch
    I would leave it alone. It's not like you really lean on the engine anyways.....more of a show piece that gets you to the sandbar and back....lol

    I got 10.9" on mine at 6200 I plan on doing a rebuild on it and hope it works the same this time around on the dyno. Mine was good for 35 hp with a standard ring pack. Going a little more low tension this time around.

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    Senior Member tx-19's Avatar
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    I wonder if I took the relief value out of the pump if it would pull a little more.

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    Senior Member Bruise Brothers Dad's Avatar
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    Don't beat me up over this, it's my car that I restored. Used this before and @3500 rpm it pulled a little over 7 inches of vacuum, 12 at wot. Surprised a lot of people with a stock replacement smog pump, real cheap but does the job. Even surprised a tech at the drag strip.
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    Need help finding this 1973 Sanger 18'6" bubble deck mahogany bottom and stringers I was living in Pomona when I sold her in 1979. Just wonder if she still exists

    Update Found my old Sanger 12/7/14 in Reno.

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