Vacuum Pump recommendations

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66Valiant528

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My breathers have puked oil on my headers and under my tires for the last time. I'm going to step up to a belt driven vacuum pump. I have a motor plate that I would like to mount it to. I have an ATI Superdamper and a single pulley to run my grapefruit size 80 amp alternator low with an AR Engineering kit. I'll have to find the single pulley manufacturer, but I think I git it through Mancini. Anyway.....what are people using? Moroso, GZ or Aerospace? Any issues I should be aware of? I will call all 3 manufacturers in the next few days but wanted to hear from people that aren't trying to sell me something. Thanks in advance . Crank pulley is from Doty Manufacturing.
 
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My breathers have puked oil on my headers and under my tires for the last time. I'm going to step up to a belt driven vacuum pump. I have a motor plate that I would like to mount it to. I have an ATI Superdamper and a single pulley to run my grapefruit size 80 amp alternator low with an AR Engineering kit. I'll have to find the single pulley manufacturer, but I think I git it through Mancini. Anyway.....what are people using? Moroso, GZ or Aerospace? Any issues I should be aware of? I will call all 3 manufacturers in the next few days but wanted to hear from people that aren't trying to sell me something. Thanks in advance .
None of those, if you want the best then buy a Star vacuum pump
 
Not trying to ruffle any feathers here, but that sounds like a lot of blow by if it's getting to the tires? Maybe a economical puke tank is in order for now and then look into the ring seal down the road?
 
Plenty of room. I'm going to move my external oil filter and hoses off of my motor plate and mount the pump on the driver's side.

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Not trying to ruffle any feathers here, but that sounds like a lot of blow by if it's getting to the tires? Maybe a economical puke tank is in order for now and then look into the ring seal down the road?
I will. I have Total Seal rings and the narrow ring lands. Professionally assembled and broken in and dialed in on an engine dyno. I have the Moroso evacuation system tied into my headers. Total Seal said that system is not very good. My engine builder suggested a vacuum pump when I did the engine. I did not have the money at that time.
 
Thank you. I understand about the thin rings. Wishing you the best that the pump tightens everything up. :thumbsup:
 
When you call them, ask what the max speed for the pump is, then select the appropriate pulleys to get near the max speed.

Joe
 
Ok so another manufacturer is CVR out of Ontario.
I'm surprised I have so few replies. Are people not running pumps in there race cars?
I'm going to call 2 engine places I've dealt with and see what they like to use. I kinda feel that they will send me to whatever vendor they get the best deal on. Not necessarily who's best. That could be my New England attitude. But it's an air pump. How different can their output be? They are all pretty close I would think. But whose lasts the longest? How has the pieces to make it work?
 
I got a used Moroso pump from a friend. Went to STAR for the regulator and GZ for the puke tank. Luckily my setup doesn’t ever draw too much oil. Results may vary from what I’ve seen. Outlet is at the front of the left valve cover.

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I run the puke tank by itself, mainly because I'm cheap, but it works for me and hardly ever have to empty it. I have mine mounted on the passenger side firewall, but wherever you have room I guess.
 
I run the puke tank by itself, mainly because I'm cheap, but it works for me and hardly ever have to empty it. I have mine mounted on the passenger side firewall, but wherever you have room I guess.
I tried a puke tank and 2 breathers on each valve cover. I have lower tension narrow piston rings on my Diamond pistons. They told me a vacuum pump would help.
 
So I put a Star Machine vacuum pump assembly in my Valiant. Indy sealed valve covers. At New England Dragway now....first run. Oiled the headers down. About 4 oz of oil in the catch can about 4 oz of oil on the firewall,tires and headers....too much vacuum? Called Star no answer today....

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So I put a Star Machine vacuum pump assembly in my Valiant. Indy sealed valve covers. At New England Dragway now....first run. Oiled the headers down. About 4 oz of oil in the catch can about 4 oz of oil on the firewall,tires and headers....too much vacuum? Called Star no answer today....

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No such thing really as too much vacuum, do you have a gauge? I suspect you have other issues you haven't found yet.
 
So I put a Star Machine vacuum pump assembly in my Valiant. Indy sealed valve covers. At New England Dragway now....first run. Oiled the headers down. About 4 oz of oil in the catch can about 4 oz of oil on the firewall,tires and headers....too much vacuum? Called Star no answer today....

View attachment 1715973084
It's not "too much vacuum" you either have an air leak or a lot of blowby. Let me explain, when you pull a vacuum on an engine, the oil can't go into the suction side of the pump unless something (air/blowby) can act on it and move it into the pump. I had this happen a bunch of times on the dyno, I take an electric vacuum pump and hook it up with the engine not running, and you can hear the leaks. FYI BBM leak a bunch at the front and rear seals, we use either a rear seal from "fastfish" or from tritec and have gotten good results.
 
I ran a 4-vane Moroso at 8-10 inches for years on a street car engine with great success. I’ve read there’s better but idk. It also consistently picked up 2 tenths..

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Motor must be sealed up tight for vac. pump to work right. I usually pressurize motor (5- 10 lbs.) and use a spray bottle with soap and water. Check valve covers, intake valley pan, intake bolts, oil pan, front and rear seals, oil pump mounting, fuel pump plate, timing cover, dist. hole.
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You need to stop and figure out why your ring seal is garbage. I hate to be that frank but you have serious ring deal issues and a vacuum pump will only apply a band aid where you need an amputation.
 
I called Total seal and they told me the low tension rings would benefit from a vacuum pump. Tim from Star called me today at the track and said basically I need to verify the engine is sealed. Pressurize the crank at 3 to 5 psi and look for leaks. Soapy water if you can't hear the leaks. Thank you all. I will get there . And the chassis certification guy showed me all the reasons that he could not certify the car. Very nice of him to take the time and not charge me the 205 bucks. Thank you Division 1 cert man!!!
 
I wish you luck too but like mentioned above something is a miss. 47 years of building my own and engines for friends and we never found the need for a vacuum pump. I have one side hooked to a header and one valve cover hooked to a catch can. I do know if those backflow preventers go bad you will have oil pushed out. They are a maintenance item and should be changed out.
 
I called Total seal and they told me the low tension rings would benefit from a vacuum pump. Tim from Star called me today at the track and said basically I need to verify the engine is sealed. Pressurize the crank at 3 to 5 psi and look for leaks. Soapy water if you can't hear the leaks. Thank you all. I will get there . And the chassis certification guy showed me all the reasons that he could not certify the car. Very nice of him to take the time and not charge me the 205 bucks. Thank you Division 1 cert man!!!


I agree. Low tension rings WILL benefit from a vacuum pump. But you have a ring seal issue. Even without the pump there is no way you should be puking **** out of the breathers.

That is a ring seal issue.
 
I wish you luck too but like mentioned above something is a miss. 47 years of building my own and engines for friends and we never found the need for a vacuum pump. I have one side hooked to a header and one valve cover hooked to a catch can. I do know if those backflow preventers go bad you will have oil pushed out. They are a maintenance item and should be changed out.
Right on! I tried the header/check valve scavenge lines and had a slight oil leak at the front crank seal. Maybe even a tad at the rear main. Took them off, added a pcv valve and no more leaks! I dunno if it was bad check valves but somehow the crankcase could not breathe.
 
I agree. Low tension rings WILL benefit from a vacuum pump. But you have a ring seal issue. Even without the pump there is no way you should be puking **** out of the breathers.

That is a ring seal issue.
I can't say you are wrong. Again I have lower tension rings on narrow 4.5 bore Diamond pistons. File fit done at a reputable shop. The engine was dynoed and dialed in there. If there's a ring issue I'll have to talk to them
 
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