Crank case evac on street/strip car. Help me out please
#212046
02/02/09 05:04 PM
02/02/09 05:04 PM
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Joined: Feb 2003
Posts: 1,523 Oakley CA
69charger440_6pa
OP
pro stock
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OP
pro stock
Joined: Feb 2003
Posts: 1,523
Oakley CA
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Hey,
So I have been wondering, what is the best way to vent the crank case on a street strip car? I have a solid cammed 493 street/strip engine. Right now I am running a breather on one side and a pcv on the other. Are there better ways to do it? Dual breathers? Crank case evac using the headers? Vacume pump?
Thanks alot
1969 Charger R/T under construction 2014 Ram 3500 Cummins 2006 Corvette Z06 2015 Corvette Z06 2014 BMW M5
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Re: Crank case evac on street/strip car. Help me out please
[Re: 69charger440_6pa]
#212048
02/02/09 05:28 PM
02/02/09 05:28 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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You would be better off to use a vac pump on the street... with a exhaust system it would have to be a VERY low restriction to allow a header vac to work
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Re: Crank case evac on street/strip car. Help me out please
[Re: moparniac]
#212051
02/02/09 06:08 PM
02/02/09 06:08 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:
You would be better off to use a vac pump on the street... with a exhaust system it would have to be a VERY low restriction to allow a header vac to work
i am planning on running a evac system as i had the tubes welded into my 2" tti's already.. I plan on going 3.5" exhaust with dynomax bullets..
I dont recall what the restriction is on all of the assorted muffs but the lower the restriction the better the evac will work. A evac will pull about 5" hg max and for every in hg that your exhaust has it will lower the evac value
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Re: Crank case evac on street/strip car. Help me out please
[Re: MR_P_BODY]
#212052
02/02/09 06:15 PM
02/02/09 06:15 PM
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Joined: Feb 2003
Posts: 1,523 Oakley CA
69charger440_6pa
OP
pro stock
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OP
pro stock
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Posts: 1,523
Oakley CA
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Does anyone make brakets for the vacuume pump that will work with Alt. and power sterring?
1969 Charger R/T under construction 2014 Ram 3500 Cummins 2006 Corvette Z06 2015 Corvette Z06 2014 BMW M5
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Re: Crank case evac on street/strip car. Help me out please
[Re: 69charger440_6pa]
#212053
02/02/09 06:25 PM
02/02/09 06:25 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:
Does anyone make brakets for the vacuume pump that will work with Alt. and power sterring?
That I do not know
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Re: Crank case evac on street/strip car. Help me out please
[Re: MR_P_BODY]
#212054
02/02/09 07:04 PM
02/02/09 07:04 PM
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Joined: Feb 2007
Posts: 6,295 U.S.
moparniac
master
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master
Joined: Feb 2007
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I was having problems with vc gaskets pushing/splitting..... I was running a PCV and breather then.... dont know how much that mattered though... i hope the header evac helps my new engine setup.. how much does the vac pump pull... how much HP do you get out of the header evac vs the vac pump...
Last edited by wedgeOmatic; 02/02/09 07:05 PM.
Mopar Performance
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Re: Crank case evac on street/strip car. Help me out please
[Re: moparniac]
#212055
02/02/09 07:08 PM
02/02/09 07:08 PM
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Joined: Feb 2003
Posts: 1,523 Oakley CA
69charger440_6pa
OP
pro stock
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OP
pro stock
Joined: Feb 2003
Posts: 1,523
Oakley CA
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its recomended to pull 12"-15" of vacuume with the pump. It can pull more but you shouldnt with a wet sump. The header evac will only pull about 5". Power gains..... not to sure about the header evac, but the vacuume pump can pick you up some serious power. I have heard of 40+HP gains
1969 Charger R/T under construction 2014 Ram 3500 Cummins 2006 Corvette Z06 2015 Corvette Z06 2014 BMW M5
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Re: Crank case evac on street/strip car. Help me out please
[Re: 69charger440_6pa]
#212058
02/02/09 07:30 PM
02/02/09 07:30 PM
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Joined: Feb 2007
Posts: 6,295 U.S.
moparniac
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master
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Ill just get a monte smith N2O setup for that much..... yowza.....
Mopar Performance
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Re: Crank case evac on street/strip car. Help me out please
[Re: 69charger440_6pa]
#212059
02/02/09 07:54 PM
02/02/09 07:54 PM
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Joined: Jan 2007
Posts: 780 Woodinville, WA
Viol8r
super stock
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super stock
Joined: Jan 2007
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Woodinville, WA
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Quote:
Quote:
You would be better off to use a vac pump on the street... with a exhaust system it would have to be a VERY low restriction to allow a header vac to work
2" tti's w/3" tti x-pipe system and ultra flow mufflers.
I have the same exhaust set-up and have the evac kit sitting on the shelf, but I am very scared to try it!
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Re: Crank case evac on street/strip car. Help me out please
[Re: Viol8r]
#212060
02/02/09 08:08 PM
02/02/09 08:08 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:
You would be better off to use a vac pump on the street... with a exhaust system it would have to be a VERY low restriction to allow a header vac to work
2" tti's w/3" tti x-pipe system and ultra flow mufflers.
I have the same exhaust set-up and have the evac kit sitting on the shelf, but I am very scared to try it!
All I can say is try it, if it fails cap off the nipple in the headers with a pipe cap
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Re: Crank case evac on street/strip car. Help me out please
[Re: MR_P_BODY]
#212062
02/02/09 08:26 PM
02/02/09 08:26 PM
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Joined: Jan 2003
Posts: 9,116 Falconer, NY
KatFysh
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Falconer, NY
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I ran a Moroso evac on my Cuda with the blower. I had 2" Super Comps and 3" exhaust that exited right in front of the rear wheels and used the Bullets. The evac didn't work for me. Among other internal problems, I had valve cover and oil pan gasket leaks..I haven't figured out what I want to do with the Dak. It has 2" fenderwell headers,3" exhaust pipe and Bullets. Exits in front of the rear tires.. Kinda coincidental here.. The gaskets are seeping a little. I may pull the engine and install new gaskets before the tracks open..
When you decide to quit, THAT is the moment when you would've succeeded..
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Re: Crank case evac on street/strip car. Help me out please
[Re: KatFysh]
#212063
02/02/09 08:42 PM
02/02/09 08:42 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:
I ran a Moroso evac on my Cuda with the blower. I had 2" Super Comps and 3" exhaust that exited right in front of the rear wheels and used the Bullets. The evac didn't work for me. Among other internal problems, I had valve cover and oil pan gasket leaks..I haven't figured out what I want to do with the Dak. It has 2" fenderwell headers,3" exhaust pipe and Bullets. Exits in front of the rear tires.. Kinda coincidental here.. The gaskets are seeping a little. I may pull the engine and install new gaskets before the tracks open..
Put a vac/pressure combo gauge on the engine. If you are making pressure you either give it more venting (breathers) or put a vac pump on it.... of course this is if the engine isnt messes up inside like broken rings
Wedge If you pull the breather off the valve cover and rev it up a few revs you should feel it on your hand (sucking), if its not working you will feel it blowing on your hand(this is the part with the hose on it) also if its broken/failed the air will be hot(exhaust)
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Re: Crank case evac on street/strip car. Help me out please
[Re: 69charger440_6pa]
#212064
02/02/09 09:27 PM
02/02/09 09:27 PM
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Joined: Feb 2003
Posts: 1,646 Ontario,Canada
firefighter3931
top fuel
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top fuel
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Posts: 1,646
Ontario,Canada
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Quote:
So I have been wondering, what is the best way to vent the crank case on a street strip car? Thanks alot
My setup ; raised breathers with baffled valvecovers and baffled tubes.
Ron
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Re: Crank case evac on street/strip car. Help me out please
[Re: firefighter3931]
#212065
02/02/09 09:35 PM
02/02/09 09:35 PM
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Joined: Feb 2007
Posts: 6,295 U.S.
moparniac
master
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master
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whats the point of a PCV then if the header evac dont work....
Mopar Performance
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