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Re: Vacuum pump??
[Re: bobs69]
#1559495
01/05/14 11:48 PM
01/05/14 11:48 PM
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Joined: May 2006
Posts: 740
WA
JD Dart
super stock
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super stock
Joined: May 2006
Posts: 740
WA
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No gain even at 16 inches. The motor didn't use oil with low tension rings and the oil stayed cleaner.
I would suggest not running that much main bearings don't look good oil psi drops too much with that much vacuum.
best so far 8.53 @ 158.59 MPH 60'1.240
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Re: Vacuum pump??
[Re: bobs69]
#1559496
01/06/14 12:02 AM
01/06/14 12:02 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Did you gain anything when you added a vacuum pump? Is it worth the money? My car goes 6.0's without a vacuum pump will I gain anything with one? Thanks 
Most low tension rings like a vac pump but any help
evacuating the pan only helps.. to my understanding
you dont want to go above 14"hg
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Re: Vacuum pump??
[Re: MR_P_BODY]
#1559497
01/06/14 09:38 AM
01/06/14 09:38 AM
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Joined: Nov 2003
Posts: 10,384
Upstate NY
Bigcube
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 10,384
Upstate NY
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I tested my motor with and without the pump. In my combo it was worth about 25 hp.
Jim
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Re: Vacuum pump??
[Re: bobs69]
#1559500
01/07/14 01:59 PM
01/07/14 01:59 PM
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Joined: Jan 2003
Posts: 13,377
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,377
Marion, South Carolina [><]
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Didn't test on the dyno, but a vacuum pump didn't make any difference at the track on my cuda. It has low tension rings too.
If you do buy one, do NOT get an Aerospace pump.
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
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Re: Vacuum pump??
[Re: an8sec70cuda]
#1559501
01/07/14 02:50 PM
01/07/14 02:50 PM
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Joined: Apr 2011
Posts: 142
illinois
evenflow
member
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member
Joined: Apr 2011
Posts: 142
illinois
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Quote:
Didn't test on the dyno, but a vacuum pump didn't make any difference at the track on my cuda. It has low tension rings too.
If you do buy one, do NOT get an Aerospace pump.
why not aerospace?
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Re: Vacuum pump??
[Re: evenflow]
#1559502
01/07/14 02:59 PM
01/07/14 02:59 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
Didn't test on the dyno, but a vacuum pump didn't make any difference at the track on my cuda. It has low tension rings too.
If you do buy one, do NOT get an Aerospace pump.
why not aerospace?
They dont create as much vac as other brands
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Re: Vacuum pump??
[Re: MR_P_BODY]
#1559504
01/07/14 03:06 PM
01/07/14 03:06 PM
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Joined: Jan 2003
Posts: 13,377
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,377
Marion, South Carolina [><]
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Quote:
Quote:
Quote:
Didn't test on the dyno, but a vacuum pump didn't make any difference at the track on my cuda. It has low tension rings too.
If you do buy one, do NOT get an Aerospace pump.
why not aerospace?
They dont create as much vac as other brands
 Mine makes about 8-10" at WOT, which may be why I've never seen any performance increase.
I've had 2 pumps fail and problems w/ the drive mandrels too. Much better w/ the CV products drive mandrel now. When this pump dies, I'll put a Moroso on it.
Of course I do street drive mine, whish isn't recommended, but I don't know anyone w/ an Aerospace pump that likes it...even on a race only car.
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
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Re: Vacuum pump??
[Re: Thumperdart]
#1559505
01/07/14 03:14 PM
01/07/14 03:14 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
Quote:
Quote:
Didn't test on the dyno, but a vacuum pump didn't make any difference at the track on my cuda. It has low tension rings too.
If you do buy one, do NOT get an Aerospace pump.
why not aerospace?
They dont create as much vac as other brands
How much is "not enuff" cos too much has ill affects I understand......... 
If you can create vac at lower RPMs then have a vac
relieve its better... I dont run a vac pump on my
W-9 because its a dry sump and that pumps pulls 12"hg
and thats close enough for me
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Re: Vacuum pump??
[Re: MR_P_BODY]
#1559506
01/11/14 11:32 PM
01/11/14 11:32 PM
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Joined: Jan 2003
Posts: 6,147
Melbourne , Australia
LA360
master
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master
Joined: Jan 2003
Posts: 6,147
Melbourne , Australia
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What ring dimensions are you running in your engine? Thinner rings will see more gains. A 5/64" or 1/16" rings won't see the gains that a 0.027" ring will.
Alan Jones
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Re: Vacuum pump??
[Re: an8sec70cuda]
#1559507
01/11/14 11:44 PM
01/11/14 11:44 PM
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Joined: Oct 2007
Posts: 3,978
Hilltown Pa
1967dartgt
master
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master
Joined: Oct 2007
Posts: 3,978
Hilltown Pa
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I have a moroso 3 vane and can only get 10-12 inches. I heard the four vanes are much better. But I have gotten rave reviews about the GZ pumps.
Brett Miller W9 cnc'd heads
STR Chassis fabraction
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Re: Vacuum pump??
[Re: LA360]
#1559508
01/12/14 12:25 AM
01/12/14 12:25 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
What ring dimensions are you running in your engine? Thinner rings will see more gains. A 5/64" or 1/16" rings won't see the gains that a 0.027" ring will.
Mine is a .043 ring set with low tension oil
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Re: Vacuum pump??
[Re: bobs69]
#1559509
01/12/14 12:11 PM
01/12/14 12:11 PM
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Joined: Sep 2007
Posts: 876
Arizona
PolyDart
super stock
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super stock
Joined: Sep 2007
Posts: 876
Arizona
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Quote:
Did you gain anything when you added a vacuum pump? Is it worth the money? My car goes 6.0's without a vacuum pump will I gain anything with one? Thanks
I was running 10.30s before adding a Moroso pump. I had been running crankcase evacuation through the header collectors prior to that. I saw no difference in ET or MPH after adding the pump. I was disappointed as I had hoped to at least drop a consistent .1 sec. I have a feeling that the power gain is ate up by the parasitic loss of running the pump itself. BTW, I am running low tension rings as well.
No dyno data, just track testing...
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