Which vacuum pump?

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Which vacuum pump?

Post  BBF552 on May 22nd 2017, 2:03 pm

Any recommendations for brand of vacuum pump to use with a 632" C head engine? Been reading a few things about moroso 3 vane pumps and some say they don't pull enough vacuum for big cubic inch engines at wide open throttle and others say they work fine. Also read that Star pumps are the way to go. Trying to see what everyone else has experienced before making a purchase.
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Re: Which vacuum pump?

Post  dfree383 on May 22nd 2017, 2:17 pm

Got a Star pump on mine
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Re: Which vacuum pump?

Post  rmcomprandy on May 22nd 2017, 3:51 pm

BBF552 wrote:Any recommendations for brand of vacuum pump to use with a 632" C head engine? Been reading a few things about moroso 3 vane pumps and some say they don't pull enough vacuum for big cubic inch engines at wide open throttle and others say they work fine. Also read that Star pumps are the way to go. Trying to see what everyone else has experienced before making a purchase.

I use the pumps from "GZ Motorsports" on the engines I build with crankcase vacuum pumps. Great results.

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Re: Which vacuum pump?

Post  TravisRice on May 22nd 2017, 7:16 pm

If you were to use the moroso go with the 4 vane pump which is designed for drysump engines. You can always bleed off or limit the vacuum with a blow off valve. What I did and worked great for what it's worth.

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Re: Which vacuum pump?

Post  Lem Evans on May 22nd 2017, 7:44 pm

I ran across this unit Saturday afternoon. It's on a very large C460 unit that will have more than one 'kit'. External wet sump program.


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Re: Which vacuum pump?

Post  TravisRice on May 22nd 2017, 7:49 pm

Lem Evans wrote:I ran across this unit Saturday afternoon. It's on a very large C460 unit that will have more than one 'kit'. External wet sump program.


Young kids have nothing on you. Nice selfie....lol

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Re: Which vacuum pump?

Post  Lem Evans on May 22nd 2017, 7:56 pm


"Young kids have nothing on you. Nice selfie....lol" ....weird stuff their!!! Embarassed

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Re: Which vacuum pump?

Post  dfree383 on May 22nd 2017, 8:15 pm

Whoooooooooo shiney
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Re: Which vacuum pump?

Post  TravisRice on May 22nd 2017, 9:04 pm

That's not the portrait series Lem Evans water pump is it.? Lol

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Re: Which vacuum pump?

Post  BOSS 429 on May 22nd 2017, 10:36 pm

BBF552 wrote:Any recommendations for brand of vacuum pump to use with a 632" C head engine? Been reading a few things about moroso 3 vane pumps and some say they don't pull enough vacuum for big cubic inch engines at wide open throttle and others say they work fine. Also read that Star pumps are the way to go. Trying to see what everyone else has experienced before making a purchase.


moroso 4 vane,and you can always back it off
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