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PCV, EVAC or PUMP #3224689 04/03/24 10:57 AM 04/03/24 10:57 AM
Joined: Feb 2015 Posts: 162 Chicago-area Illinois 4mopower OP member
4mopower OP member Joined: Feb 2015 Posts: 162 Chicago-area Illinois	At what point did you step up on a street driven BB. Is Evac usable on the street? would you use a oil catch with the Evac? Breather on one cover and evac on the opposite side? Or two evac's?

Re: PCV, EVAC or PUMP [Re: 4mopower] #3224742 04/03/24 01:27 PM 04/03/24 01:27 PM
Joined: Oct 2005 Posts: 268 Anchorage, Alaska metallicareload enthusiast
metallicareload enthusiast Joined: Oct 2005 Posts: 268 Anchorage, Alaska	I would also like to know, I’m curious if anyone has tried using an OEM vacuum pump a lot of the European cars have? I use a PCV valve on one valve cover and a breather on the other. Definitely use a catch can 440, 4-Speed, 3.54 1968, when Dinosaurs ruled the Earth

Re: PCV, EVAC or PUMP [Re: 4mopower] #3224756 04/03/24 02:20 PM 04/03/24 02:20 PM
Joined: Oct 2003 Posts: 4,013 South Park, Pa. 68LAR master
68LAR master Joined: Oct 2003 Posts: 4,013 South Park, Pa.	Originally Posted by 4mopower At what point did you step up on a street driven BB. Is Evac usable on the street? would you use a oil catch with the Evac? Breather on one cover and evac on the opposite side? Or two evac's? I run an evac on my race/street stroker. It pulls 5 inches at idle. Two breathers, one on each side in valve covers. Been like this for at least twenty years with no issues. I would guess that a lot would depend on the cam specs. What I have works for my set up very well. Last edited by 68LAR; 04/03/24 02:22 PM. 4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight

Re: PCV, EVAC or PUMP [Re: 4mopower] #3224768 04/03/24 02:38 PM 04/03/24 02:38 PM
Joined: May 2019 Posts: 712 Lake Villa Il INTMD8 super stock
INTMD8 super stock Joined: May 2019 Posts: 712 Lake Villa Il	I run a GZ vacuum pump on the street. Works great, I'm happy with it. 69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700

Re: PCV, EVAC or PUMP [Re: INTMD8] #3224890 04/03/24 10:01 PM 04/03/24 10:01 PM
Joined: Jan 2004 Posts: 4,565 Motor City 6 6PKRTSE master
6PKRTSE master 6 Joined: Jan 2004 Posts: 4,565 Motor City	I run a Moroso advanced 4 vane for street/strip use works great also. 1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.

Re: PCV, EVAC or PUMP [Re: 4mopower] #3225456 04/06/24 04:49 PM 04/06/24 04:49 PM
Joined: Feb 2015 Posts: 162 Chicago-area Illinois 4mopower OP member
4mopower OP member Joined: Feb 2015 Posts: 162 Chicago-area Illinois	Looks like a pump is the general choice even on a street car. I may be looking into that. Thanks everyone for your input.

Re: PCV, EVAC or PUMP [Re: 4mopower] #3225667 04/07/24 07:04 PM 04/07/24 07:04 PM
Joined: Oct 2006 Posts: 1,264 New York, USA Chargerfan68 pro stock
Chargerfan68 pro stock Joined: Oct 2006 Posts: 1,264 New York, USA	I was recently thinking about the evac setup bc I am pushing oil out breathers at higher rpm. However, trying to figure out how Not to kill my o2 sensors in the collectors. So, I put it off for now. Just another thought if you run o2 sensors. 1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.

Re: PCV, EVAC or PUMP [Re: 68LAR] #3225675 04/07/24 07:43 PM 04/07/24 07:43 PM
Joined: Mar 2006 Posts: 9,834 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,834 MI, usa	Originally Posted by 68LAR Originally Posted by 4mopower At what point did you step up on a street driven BB. Is Evac usable on the street? would you use a oil catch with the Evac? Breather on one cover and evac on the opposite side? Or two evac's? I run an evac on my race/street stroker. It pulls 5 inches at idle. Two breathers, one on each side in valve covers. Been like this for at least twenty years with no issues. I would guess that a lot would depend on the cam specs. What I have works for my set up very well. How do you get 5"hg at idle with breathers? Doug

Re: PCV, EVAC or PUMP [Re: dvw] #3225697 04/07/24 10:16 PM 04/07/24 10:16 PM
Joined: Nov 2004 Posts: 16,477 On the run… BloFish I Live Here
BloFish I Live Here Joined: Nov 2004 Posts: 16,477 On the run…	My simple set up. Last edited by BloFish; 04/08/24 12:27 PM. It really doesn't matter whether you win or lose… as long as you look good doing it! ‘65 A100 ‘69 ‘Cuda ‘73 Vega GT ‘06 Mega Cab ‘14 Mercedes SLK

Re: PCV, EVAC or PUMP [Re: BloFish] #3225700 04/07/24 10:37 PM 04/07/24 10:37 PM
Joined: Jan 2003 Posts: 20,759 A collage of whims topside Too Many Posts
topside Too Many Posts Joined: Jan 2003 Posts: 20,759 A collage of whims	When I had to meet a decibel rule at Sears Point many years back, we added a 3.5" exhaust w/race bullets & turndowns at the axle. The 368" SB had a fairly low-tension ring package & the usual evac setup into the collectors. That seemed to render the evac system useless. Changed to a GM passenger car electric pump, which fixed it inexpensively. Pulled about 5" or so, IIRC.

Re: PCV, EVAC or PUMP [Re: Chargerfan68] #3225715 04/08/24 06:19 AM 04/08/24 06:19 AM
Joined: Feb 2015 Posts: 162 Chicago-area Illinois 4mopower OP member
4mopower OP member Joined: Feb 2015 Posts: 162 Chicago-area Illinois	Chargerfan68 - I am running O2 sensors but I was thinking of moving the check valve downstream of the collector. Last edited by 4mopower; 04/08/24 06:24 AM.

Re: PCV, EVAC or PUMP [Re: dvw] #3225721 04/08/24 07:25 AM 04/08/24 07:25 AM
Joined: Oct 2003 Posts: 4,013 South Park, Pa. 68LAR master
68LAR master Joined: Oct 2003 Posts: 4,013 South Park, Pa.	Originally Posted by dvw Originally Posted by 68LAR Originally Posted by 4mopower At what point did you step up on a street driven BB. Is Evac usable on the street? would you use a oil catch with the Evac? Breather on one cover and evac on the opposite side? Or two evac's? I run an evac on my race/street stroker. It pulls 5 inches at idle. Two breathers, one on each side in valve covers. Been like this for at least twenty years with no issues. I would guess that a lot would depend on the cam specs. What I have works for my set up very well. How do you get 5"hg at idle with breathers? Doug I don’t know to be truthful. I installed the evacuation system and checked it with a vacuum gauge and this is what I got. I do know that on the street, you need straight thru mufflers. Chambered mufflers have too much back pressure. Maybe this is why it works for me. I run Magnaflows. 4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight

Re: PCV, EVAC or PUMP [Re: 68LAR] #3225733 04/08/24 08:42 AM 04/08/24 08:42 AM
Joined: Jan 2003 Posts: 13,360 Marion, South Carolina [><] an8sec70cuda I Live Here
an8sec70cuda I Live Here Joined: Jan 2003 Posts: 13,360 Marion, South Carolina [><]	For a mostly street car, I like two big hoses (-10). One on each valve cover to a breather tank. No pcv or 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

Re: PCV, EVAC or PUMP [Re: topside] #3225761 04/08/24 11:16 AM 04/08/24 11:16 AM
Joined: Feb 2015 Posts: 162 Chicago-area Illinois 4mopower OP member
4mopower OP member Joined: Feb 2015 Posts: 162 Chicago-area Illinois	topside... So when you added the exhaust you lost pulse for the evac to function?

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