Just put a electric vacuum pump on SBC. Several guys had suggested it including motor builder. Lasted all of 10 minutes and burnup. After speaking with engine guy, forgot to tell him that the car is 16 volt. He seems to think thats the problem. Ideas? Have no room for mechanical. Does some one make a step down from 16v to 12v? I remember reading years ago that the water pumps need to be slowed down in some cases to allow the water to heat soak in block longer.
July 09, 2023, 08:25 PM
1320racer
Not one nationally known professional bracket engine builder uses an electric vacuum pump on their engines and 99.99% of bracket racers that have a vacuum pump is belt driven, why do you want to be a pioneer?
My idea is you should do the same.
July 09, 2023, 08:30 PM
tas472
Its what I had.
July 09, 2023, 08:31 PM
imakehp
I understand you have no room for a belt driven pump, so if you want (have) to stay with the electric pump just search "16v to 12v voltage reducer" on Amazon or Ebay or anywhere. Around 10 bucks. If you know what amp fuse the pump manufacturer recommends I would find a reducer that's rated at whatever amp the fuse is at least. Good luck with your project.....
. Dave
F J B
July 09, 2023, 08:39 PM
1320racer
quote:
Originally posted by tas472: It’s what I had.
If you can’t afford at least a used belt pump, scrap the electric pump idea and don’t run a vacuum pump just like the many that don’t, typically with lower hp small and bb engines typically found in foot brake and no box cars.
July 09, 2023, 08:48 PM
tas472
Ed, Why are you so aginst the electric? We run alchol and headers are super tight and have no evac fittings. We did have the valve covers vented to puke tank in warm weather works great, but when cool weather comes in milks oil. Front cross member doesen't allow for any type pulleys.
Thanks Dave will look into Amazon. Just thought somebody had already solved this issue.
July 09, 2023, 08:52 PM
1320racer
If electric vacuum pumps were worth a shyt, they’d be on every engine coming out of all the professional builder’s shops and on every car in the lanes.
July 09, 2023, 09:05 PM
Big Steve
Electric vacuum pump will be zero help to prevent moisture or help ring seal while the engine is running. They just dont pull much vacuum. About all they are good for is pulling a slight vacuum while using a pan heater to heat the oil when the engine is not running. Methanol will boil at about 150* I would find the room and install evac fittings in the headers
July 09, 2023, 09:12 PM
1320racer
quote:
Originally posted by Big Steve: Electric vacuum pump will be zero help to prevent moisture or help ring seal while the engine is running.
Big Steve…KNOWS!
July 10, 2023, 07:14 AM
Curly1
I to would prefer a mechanical vacuum pump but man said in his first post he does not have room. As for the money those electric pumps are pretty expensive to so I would not assume it is about money.
A step down voltage reducer may help but if it only lasted 5 minutes I do not know how much even that would help.
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July 10, 2023, 07:30 AM
1320racer
Engine guy is clueless. He can make room, there's a multitude of brackets available including this one that mounts both the vacuum pump and alternator..
All that said, an electric pump is a waste of time and money that will do "zero help to prevent moisture or help ring seal while the engine is running"!!This message has been edited. Last edited by: 1320racer,
July 10, 2023, 08:17 AM
Wooley
The bracket Ed showed is the most compact way to mount a vacuum pump and it will work with most electric water pumps. Have a chassis shop or someone local notch and box the cross member. In the long run it will be well worth the effort.
July 10, 2023, 08:19 AM
CURTIS REED
I don't use one but to say it doesn't help with moisture isn't true. I know multiple people who use them and it does pull out quite a bit of water on a pass. As far as pulling vacuum on a pass, no they won't do that.
As far as having room I would have to see what he has going. My roadster is a pain to package everything up front but I was able to fit a belt driven pump, alternator, crank trigger and my vacuum tank is also mounted on the front of my engine. I did have to turn my water pump upside down and run the hose over the top though. Where there is a will there is usually a way.
____________________________ 2017 and 2018 Osage Casinos Tulsa Raceway Park No-Box Champion
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July 10, 2023, 09:51 AM
Eman
What electric vacum pump are you using? Are you using the factory emmisions pump as a vacum pump? I've seen people use them but not with a lot of success.
July 10, 2023, 02:11 PM
moparacer
quote:
Originally posted by CURTIS REED: I don't use one but to say it doesn't help with moisture isn't true. I know multiple people who use them and it does pull out quite a bit of water on a pass. As far as pulling vacuum on a pass, no they won't do that.
As far as having room I would have to see what he has going. My roadster is a pain to package everything up front but I was able to fit a belt driven pump, alternator, crank trigger and my vacuum tank is also mounted on the front of my engine. I did have to turn my water pump upside down and run the hose over the top though. Where there is a will there is usually a way.
I used one in the early 2000's on my alky injected dragster. It pulled moisture and helped keep the oil clean. No way will they ever move enough air to pull vaccum on a pass.
About 10 years ago I switched to a star pump on mine and never looked back
I think Star makes some of the smallest and best pumps on the market.
July 10, 2023, 02:36 PM
CURTIS REED
quote:
Originally posted by moparacer:
quote:
Originally posted by CURTIS REED: I don't use one but to say it doesn't help with moisture isn't true. I know multiple people who use them and it does pull out quite a bit of water on a pass. As far as pulling vacuum on a pass, no they won't do that.
As far as having room I would have to see what he has going. My roadster is a pain to package everything up front but I was able to fit a belt driven pump, alternator, crank trigger and my vacuum tank is also mounted on the front of my engine. I did have to turn my water pump upside down and run the hose over the top though. Where there is a will there is usually a way.
I used one in the early 2000's on my alky injected dragster. It pulled moisture and helped keep the oil clean. No way will they ever move enough air to pull vaccum on a pass.
About 10 years ago I switched to a star pump on mine and never looked back
I think Star makes some of the smallest and best pumps on the market.
Star is my brand of choice also. It is a small unit. Moroso makes a good product also though and you can clock the out port on theirs so it drains any leftover stuff from the pump. That is the only thing I don't like about Star's design.
____________________________ 2017 and 2018 Osage Casinos Tulsa Raceway Park No-Box Champion
2018 Div4 Goodguys Hammer award winner
July 11, 2023, 04:32 AM
Top355x
Everyone commenting about can fit one he says crossmember is in the way maybe doesn’t have room in front of crank for pulley and the way I interpret his post is sounds like he’s is just trying to eliminate moisture
July 11, 2023, 06:25 AM
1320racer
cross member is below the engine and we're only left to guess until he comes back and clarifies
July 11, 2023, 06:40 AM
434 olds
Find yourself another engine builder. This one sounds lazy. Back in the day some of the prostock guys were using electric vacuum pumps just to pick up every bit of HP. (No belt) The electric pump was originally made for the pro stock motorcycles since they cant run a belt driven pump. Not sure if anyone uses them anymore except your engine builder. BTW, not sure what pump you`re using but the one that the prostock guys were using, used a Dewalt cordless drill battery. They kept a few on the charger and after every round, they changed battery`s.
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