Educate me about vacuum pumps
#1127036
12/04/11 08:12 AM
12/04/11 08:12 AM
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Joined: Jan 2003
Posts: 2,932 Finalnd, Perkele
jyrki
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OP
master
Joined: Jan 2003
Posts: 2,932
Finalnd, Perkele
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Going through friends 528 Wedge with CNC ported Indy heads. He bought it complete a couple of years ago from states, and it really hasn't performed according to expectations. I'll tear it a part and check it, and while at it he wants to install avacuum pump since the engine was designed to use one. What all is needed, and where to get the parts from? As far as I've understood,you aim at certain vacuum and limit it with aomekind of a leak retriction? Any good links or articles?l
Plynouth VIP '67 TT IC EFI
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Re: Educate me about vacuum pumps
[Re: jyrki]
#1127041
12/04/11 12:27 PM
12/04/11 12:27 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Posts: 52,972
Romeo MI
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Quote:
Going through friends 528 Wedge with CNC ported Indy heads. He bought it complete a couple of years ago from states, and it really hasn't performed according to expectations. I'll tear it a part and check it, and while at it he wants to install avacuum pump since the engine was designed to use one. What all is needed, and where to get the parts from? As far as I've understood,you aim at certain vacuum and limit it with aomekind of a leak retriction? Any good links or articles?l
There are a few companies that make a decent vac pump... Moroso makes 2 versions a 3 vane and 4 vane... I have a Aerospace unit and I dont care for it(doesnt pull enough)... with all the reading I did I found that you dont want to exceed 14"HG or you get into wrist pin oil issues... I pull 12"HG with just my dry sump pump.... what do you need... the pump, lines (I used braided lines), a good baffle in the valve cover and a puke tank to catch any oil that the pump pulls out(get a good one...get one that enters near the bottom... if it inters near the top it sprays oil/mist into the exiting air flow path and out the breather)... then the only other thing would be the check valve that would be mounted to the other valve cover... some are adjustable, some fixed for the setting.. back to the pump... Moroso says the 4 vane was race only and will pull more than 14", there is another good pump(forget the name but its Motorsport something) and they sell all the parts... also you need a drive system... crank pulley and belt.... some but not all of the pumps come with some sort of mounting.... thats about all I can think of
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Re: Educate me about vacuum pumps
[Re: Big Squeeze]
#1127042
12/04/11 12:30 PM
12/04/11 12:30 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
I know there not good for the street, removes oil from the wrist pins.
According to the guys on YB, that's on old wive's tale....... Consensus is the more vacuum, the better.....
Not according to Rehere Morrison(sp) thats where I read my info from
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Re: Educate me about vacuum pumps
[Re: RT540]
#1127046
12/04/11 02:45 PM
12/04/11 02:45 PM
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Joined: Feb 2006
Posts: 698 Alberta Canada
Edge
mopar
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mopar
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Posts: 698
Alberta Canada
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Instead of pulling vacuuum from the valve cover you can pull from the fuel pump location as there is a limited amount of oil splashing from this location.
76 Duster
work in progress
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Re: Educate me about vacuum pumps
[Re: hookNgone]
#1127049
12/04/11 06:26 PM
12/04/11 06:26 PM
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Joined: Jan 2003
Posts: 6,139 Melbourne , Australia
LA360
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master
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Posts: 6,139
Melbourne , Australia
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Most of the decent engines I have come across ran a Star Machine Vacuum pump. They sell everything you will need. For the budget conscious racer there are the GZ Motorsports kits which work quite well also. I will be looking at one of their kits for my ride. For a race engine, a vac pump is a worthwhile investment.
Alan Jones
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Re: Educate me about vacuum pumps
[Re: Big Squeeze]
#1127052
12/04/11 07:38 PM
12/04/11 07:38 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Romeo MI
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Quote:
It's funny how many people say not to run too much vacuum because it'll pull too much oil from the wrist pins but none have personaly experienced it......or tried any higher.....even the guy that posted in the link above said he's ran as much as 20" without any problems but was scared so he lowered it back down to 15"......
On your link to YB the guy was running high vac on nitrous applications where you have greater blow-by and the vac was dropping during the run... he was actually starting at 25"hg but ending the run at about 15"hg so by rights he isnt running high vac
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