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BB vacuum pump kit choice? #2649078
04/25/19 10:48 PM
04/25/19 10:48 PM
Joined: Jan 2003
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Finalnd, Perkele
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jyrki Offline OP
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jyrki  Offline OP
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Finalnd, Perkele
Which kit would you recommend, price and quality concerned.
And which not?


Plynouth VIP '67 TT IC EFI
Re: BB vacuum pump kit choice? [Re: jyrki] #2649087
04/25/19 11:37 PM
04/25/19 11:37 PM
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Bend,OR USA
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Cab_Burge Offline
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Bend,OR USA
Star or GZ up scope


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: BB vacuum pump kit choice? [Re: Cab_Burge] #2649119
04/26/19 05:13 AM
04/26/19 05:13 AM
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MI, usa
dvw Offline
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GZ was complete fits well on mine. Competitively priced.Good guy to deal with.
Doug

E21.jpgE18.jpg
Re: BB vacuum pump kit choice? [Re: jyrki] #2649525
04/27/19 11:04 AM
04/27/19 11:04 AM
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Posts: 452
Monrovia, So-Cal, USA
racerhog Offline
mopar
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Monrovia, So-Cal, USA
Moroso (4) Vane


Bob(Cowboy)Hogan
Monrovia So-Cal
Re: BB vacuum pump kit choice? [Re: racerhog] #2649544
04/27/19 01:19 PM
04/27/19 01:19 PM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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Cab_Burge Offline
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Bend,OR USA
I have a used enhanced GZ on the race car now, it didn't pull much vacuum ,5.0 or less : on the old motor whiney
I have both a 3 and 4 vane used Moroso pumps that I will try this year on the new motor that is built for a vacuum pump, I'll post my results as they happen luck

Last edited by Cab_Burge; 04/28/19 12:58 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: BB vacuum pump kit choice? [Re: Cab_Burge] #2649744
04/28/19 06:54 AM
04/28/19 06:54 AM
Joined: Jan 2003
Posts: 2,901
A shed in England
Tig Offline
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A shed in England
I have a Moroso 4 Vane enhanced, pulls 7 in/hg at idle and 12 over 3000rpm though after some research I may set it to pull a little more.


'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
Re: BB vacuum pump kit choice? [Re: Tig] #2649773
04/28/19 08:30 AM
04/28/19 08:30 AM
Joined: Mar 2006
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MI, usa
dvw Offline
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dvw  Offline
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A big factor in how much vacuum you can pull is how well the engine is sealed. I haven't tried reversing it yet but the rear main seal installed in it's normal orientation appears to be a big leak path. There is a double lip seal available as well.
Doug

Re: BB vacuum pump kit choice? [Re: dvw] #2650184
04/29/19 12:11 PM
04/29/19 12:11 PM
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Marion, South Carolina [><]
an8sec70cuda Offline
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Marion, South Carolina [><]
I have the 4 vane Moroso on the hemi in the cuda and an older 3 vane Moroso on the Camaro and they work great. I used to run an Aerospace Components pump and it was complete JUNK.

Heard nothing but good things about the GZ and Star pumps.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: BB vacuum pump kit choice? [Re: an8sec70cuda] #2650187
04/29/19 12:17 PM
04/29/19 12:17 PM
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Posts: 19,304
Las Vegas
Al_Alguire Offline
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Las Vegas
Moroso 3 Vane on the dragster pulls 10 at idle and 14 down track, no regulator. My car has an enhanced 4 vane and pulls 10 or so at idle and 17-18 top end, not regulated. My experience sealing the engine is the key.


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
Re: BB vacuum pump kit choice? [Re: Al_Alguire] #2650235
04/29/19 02:28 PM
04/29/19 02:28 PM
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Posts: 9,791
MI, usa
dvw Offline
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dvw  Offline
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Originally Posted by Al_Alguire
Moroso 3 Vane on the dragster pulls 10 at idle and 14 down track, no regulator. My car has an enhanced 4 vane and pulls 10 or so at idle and 17-18 top end, not regulated. My experience sealing the engine is the key.


Al do you install the rear main seal backward?
Doug

Re: BB vacuum pump kit choice? [Re: dvw] #2650291
04/29/19 05:33 PM
04/29/19 05:33 PM
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Posts: 916
SE Washington
Forest Offline
super stock
Forest  Offline
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SE Washington
My motor pulls 9-10" at the beginning of the run and 15.2" ish is what the regulator stops it at. I run a GZ pump and my crank seal is installed the conventional way.

Re: BB vacuum pump kit choice? [Re: dvw] #2650313
04/29/19 07:01 PM
04/29/19 07:01 PM
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Carson City, Nevada
Biginchmopar Offline
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Carson City, Nevada
Moroso 4 vane w/ reg (that I have wide open)

Re: BB vacuum pump kit choice? [Re: Biginchmopar] #2650505
04/30/19 11:56 AM
04/30/19 11:56 AM
Joined: Jan 2003
Posts: 19,304
Las Vegas
Al_Alguire Offline
I Live Here
Al_Alguire  Offline
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Las Vegas
Doug, no my rear main seal is in the standard direction. I don't use a regulator on any of my stuff, just never been able to pull enough vacuum to worry about it.


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
Re: BB vacuum pump kit choice? [Re: Al_Alguire] #2651340
05/02/19 07:48 PM
05/02/19 07:48 PM
Joined: Feb 2006
Posts: 474
Alberta, Canada
451Guy Offline
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451Guy  Offline
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Alberta, Canada
I have a Star. I believed the hype and bought what I thought was the best option even though it was way more expensive than the others. I also bought the fancy separated catch can. Now to be fair my motor is not optimized for a vaccum pump but I get next to no vaccumm. I have the releif valve screwed in all the way and get 0 at idle and maybe 3 pounds going down the track. Plus as an added bonus it will fill up the puke tank and then spray oil all over my engine bay including my ceramic coated fenderwell headers. It is now collecting dust under my work bench and the old school pan evacs went back on! Now in fairness to Star my buddy has one on his Pontiac and thinks its the cats meow!!!!!


Thanx 451 Guy

512 cu in 71 Demon Super Street Car - NO LONGER - Broke Crank
Best ET 9.57 @ 139.96

451 cu in Pump Gas - 71 Demon Super Street Car
Best ET 9.99 @ 136.80

512 cu in 69 Charger R/T
Best ET 11.39 @ 118.11

Re: BB vacuum pump kit choice? [Re: 451Guy] #2651349
05/02/19 08:05 PM
05/02/19 08:05 PM
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MI, usa
dvw Offline
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dvw  Offline
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Originally Posted by 451Guy
I have a Star. I believed the hype and bought what I thought was the best option even though it was way more expensive than the others. I also bought the fancy separated catch can. Now to be fair my motor is not optimized for a vaccum pump but I get next to no vaccumm. I have the releif valve screwed in all the way and get 0 at idle and maybe 3 pounds going down the track. Plus as an added bonus it will fill up the puke tank and then spray oil all over my engine bay including my ceramic coated fenderwell headers. It is now collecting dust under my work bench and the old school pan evacs went back on! Now in fairness to Star my buddy has one on his Pontiac and thinks its the cats meow!!!!!

You are pulling air in somewhere. That will fill the tank, unless your pick up point is in liquid. Fab an adapter and put 3-4 psi in the crankcase. Then spray the motor with soapy water solution. My bet is you'll see bubbles.
Doug

Last edited by dvw; 05/02/19 08:06 PM.
Re: BB vacuum pump kit choice? [Re: dvw] #2651614
05/03/19 03:31 PM
05/03/19 03:31 PM
Joined: Feb 2006
Posts: 474
Alberta, Canada
451Guy Offline
mopar
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Alberta, Canada
Hey Doug!

Thank you for the advice. I was thinking the exact same thing. The pick up is in the front of the driver side valve cover. It is the fitting that star provides with the kit. The opening is currently facing down. I was thinking about facing it up and then retrying it.

With regards to pressuring up the motor. I actually put a valve stem in my valve cover for that exact purpose. However, when I checked it last I pulled the motor out of the car and I borrowed my buddies smoker. When we smoked it the smoke was coming out of the rear main seal area. I pulled the pan and redid the side seals and coated it with silicone. It still leaked a little around the seal but it was better. I was hoping when it was running it would seal a little better. But now that you mention it it took a while after doing that to fill the puke tank the first time. I bet a new leak has sprung up. I guess I have a little work to do.


Thanx 451 Guy

512 cu in 71 Demon Super Street Car - NO LONGER - Broke Crank
Best ET 9.57 @ 139.96

451 cu in Pump Gas - 71 Demon Super Street Car
Best ET 9.99 @ 136.80

512 cu in 69 Charger R/T
Best ET 11.39 @ 118.11

Re: BB vacuum pump kit choice? [Re: 451Guy] #2651620
05/03/19 03:50 PM
05/03/19 03:50 PM
Joined: Aug 2003
Posts: 4,662
On the parachute mount
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n20mstr Offline
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On the parachute mount
Originally Posted by 451Guy
Hey Doug!

Thank you for the advice. I was thinking the exact same thing. The pick up is in the front of the driver side valve cover. It is the fitting that star provides with the kit. The opening is currently facing down. I was thinking about facing it up and then retrying it.

With regards to pressuring up the motor. I actually put a valve stem in my valve cover for that exact purpose. However, when I checked it last I pulled the motor out of the car and I borrowed my buddies smoker. When we smoked it the smoke was coming out of the rear main seal area. I pulled the pan and redid the side seals and coated it with silicone. It still leaked a little around the seal but it was better. I was hoping when it was running it would seal a little better. But now that you mention it it took a while after doing that to fill the puke tank the first time. I bet a new leak has sprung up. I guess I have a little work to do.


another area to leak on a big block is the stock timing cover crank seal. IF you notice all the big blocks in this thread that pull over 10" have a jesel belt drive. That has a way better crank seal than the stock type. There are better crank seals to buy though.

Also with the Star pump, they don't like ANY oil in them. Try brake cleaning your pump by spraying brake clean into it while the engine is idling.


Call Star, they are helpful too and will walk you through what your doing wrong. They are some of the best vac pumps out there


....BAD A$$ STREET CAR.....






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