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OK.. I've been thinking about putting a vacuum pump on my 521. I had planned on running an exhaust crankcase evacuation system but I found a small pile of money laying around so I thought I would burn it. My question is what vacuum pump do I need? While looking on Summit Racing I found Moroso vacuum pumps that range from $439 to $1100 bucks. There isn't much difference in the descriptions so I am not sure what I need. Also there doesn't appear to be any mounting brackets sold for these things for a 385 series application. I am running a front motor plate so how do you guys get these things hook up? Or do you just fabricate your own bracket?

Thanks in advance for the time & experience.
 

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I went through this in the spring. What really screwed it up for me is I have limited room in front of my engine with my cel and fuel pump mounted behind the rad. And where my rack is mounted there is no way I can get a mandrel on my crankshaft. I went with an electric one, but a belt drive is much better! I see about 5" of vacuum max. Aeromotive also makes a nice kit. Otherwise I didn't find anything for a BBF application. It's fab all the way!
 

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I saw the electric ones but I assumed that they were just for brake booster vacuum. If you are pulling at least 5 inches of vacuum all the time that should be plenty shouldn't it? I mean at least you don't have any positive pressure within the motor.
 

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It seemed to help over the evac kit in the headers, but they say 8-12" is optimal. Especially with alky. I noticed a big difference in oil cleanliness. If this pump was on a small block and not a 557 it would probably work great! It is from Kaye racing, and it is NOT for vacuum brakes. He sells a kit with the fittings, hose, and a separator tank that goes between the engine and pump to keep the crud from ruining it. I just bought the pump and tank and made my own hoses with extra aeroquip fittings I had left over from the fuel system. My buddy bought the Aeromotive belt drive kit for his 565 Chevy and he sees 10" at WOT at the finish line. I see 3-5".
 

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Discussion Starter #5 (Edited)
That is good info. Thanks. I just picked up a set of Canton fabbed valve covers off the auction block. I'm planning on using those to hook a vacuum system up. Any idea what unit your buddy put on his Chevy? I'm still not sure what unit I need. They sell many with big price differences.
 

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Thanks for posting that Rob..

That seems a little expensive though for a used piece. They retail at Summit for $615. I realize he has a pulley & 2 belts with it but the 4 inch pulley retails for only $44 bucks. Maybe I'm missing something obvious here but if I were going to pay that price I'd just buy new and get the warranty that comes with it.
 

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Vacuum Pump

Hi,

I was getting ready to post my Moroso 22641 pump on the Acution Block when I saw this. I pulled 10" with no problems on my big block. I have the pump, mounting bracket to the head and both pullies for $350 plus shipping. Selling cause I stepped up to a Peterson's Wet/Vac combo. Let me know if you're interested.

Rob
 

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Discussion Starter #9
Hi,

I was getting ready to post my Moroso 22641 pump on the Acution Block when I saw this. I pulled 10" with no problems on my big block. I have the pump, mounting bracket to the head and both pullies for $350 plus shipping. Selling cause I stepped up to a Peterson's Wet/Vac combo. Let me know if you're interested.

Rob
Sounds like a decent deal. How old is it? How many runs on it?
 

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Vacuum Pump

I purchased it from a guy who ran it on his 514 (which i also bought). According to him, he purchased it new and ran it for 2 seasons. I only ran it for 1, (maybe 20 passes at most). I know it'll pull more vacuum, but i have a limiter on the valve cover set at 10". I don't think you'll be disappointed with it.
 

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Discussion Starter #11
I purchased it from a guy who ran it on his 514 (which i also bought). According to him, he purchased it new and ran it for 2 seasons. I only ran it for 1, (maybe 20 passes at most). I know it'll pull more vacuum, but i have a limiter on the valve cover set at 10". I don't think you'll be disappointed with it.
Was it run with a motor plate?
 

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I purchased it from a guy who ran it on his 514 (which i also bought). According to him, he purchased it new and ran it for 2 seasons. I only ran it for 1, (maybe 20 passes at most). I know it'll pull more vacuum, but i have a limiter on the valve cover set at 10". I don't think you'll be disappointed with it.
Might not want to sell the pump just yet, We were on the dyno this week testing with a wetvac peterson,which works great,but only pulled 4.0 ,I use to run one on my hemi before I went to a dry sump,and im going to use one( vac pump) on it also.
 

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Chris Moroso makes a universal bracket for engine plate application for their pumps probably for use with a Mandrel. I will be installing one on mine over winter but due to the super tight clearance in my engine bay (yes even tighter than a Mustang) I am looking into buying a double groove 4 inch crank pulley and running a 6 inch pulley on the vacuum pump I will more than likely be trimming the motorplate and fabricating a bracket to bolt the pump to the front of the cylinder head unless I get crazy and decide to modify the firewall and cowl to move the engine back about 6 inchs. Which is not out the realm of possibilities. I will have to check into the rules but I believe the only thing I will need to do besides the obvious is to add a dash bar to the rollcage to stay legal to 8.50 with the modded firewall.
 

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Chris Moroso makes a universal bracket for engine plate application for their pumps probably for use with a Mandrel. I will be installing one on mine over winter but due to the super tight clearance in my engine bay (yes even tighter than a Mustang) I am looking into buying a double groove 4 inch crank pulley and running a 6 inch pulley on the vacuum pump I will more than likely be trimming the motorplate and fabricating a bracket to bolt the pump to the front of the cylinder head unless I get crazy and decide to modify the firewall and cowl to move the engine back about 6 inchs. Which is not out the realm of possibilities. I will have to check into the rules but I believe the only thing I will need to do besides the obvious is to add a dash bar to the rollcage to stay legal to 8.50 with the modded firewall.
nope,peterson, and you cant bolt anything to the front of the heads
 

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My mistake Rich I was almost positive I had accessory bolt holes in the front of my heads. That should save me some work then.



main prob is room , noway to do it on the heads on your deal
 

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Discussion Starter #20
Chris Moroso makes a universal bracket for engine plate application for their pumps probably for use with a Mandrel. I will be installing one on mine over winter but due to the super tight clearance in my engine bay (yes even tighter than a Mustang) I am looking into buying a double groove 4 inch crank pulley and running a 6 inch pulley on the vacuum pump I will more than likely be trimming the motorplate and fabricating a bracket to bolt the pump to the front of the cylinder head unless I get crazy and decide to modify the firewall and cowl to move the engine back about 6 inchs. Which is not out the realm of possibilities. I will have to check into the rules but I believe the only thing I will need to do besides the obvious is to add a dash bar to the rollcage to stay legal to 8.50 with the modded firewall.
Sounds like you have your hands full as well.

Any idea what the part number is on that bracket? I'm not sure how I missed this post before but I did. I just saw it 2 minutes ago. Thanks for the info! I was on SummitRacing.com earlier trying to figure this out and I gave up for now.

Do I need any kind of canister to catch oil that comes though the lines? Or do you just run some -12AN lines straight from the valve covers to the vacuum pump?
 
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