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Crank case evac on street/strip car. Help me out please #212046
02/02/09 05:04 PM 02/02/09 05:04 PM
Joined: Feb 2003
Posts: 1,523
Oakley CA
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69charger440_6pa Offline OP
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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
Re: Crank case evac on street/strip car. Help me out please [Re: 69charger440_6pa] #212047
02/02/09 05:17 PM 02/02/09 05:17 PM
Joined: Oct 2004
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Left Coast
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BobR Offline
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The best way to do it is the vacuum pump. This is not the cheapest nor easiest, however. Header evacs don't work very well with full exhausst and not at all with flowmasters.
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
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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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
Re: Crank case evac on street/strip car. Help me out please [Re: MR_P_BODY] #212049
02/02/09 05:43 PM 02/02/09 05:43 PM
Joined: Feb 2003
Posts: 1,523
Oakley CA
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69charger440_6pa Offline OP
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69charger440_6pa  Offline OP
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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.

1969 Charger R/T under construction
2014 Ram 3500 Cummins
2006 Corvette Z06
2015 Corvette Z06
2014 BMW M5
Re: Crank case evac on street/strip car. Help me out please [Re: MR_P_BODY] #212050
02/02/09 05:50 PM 02/02/09 05:50 PM
Joined: Feb 2007
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moparniac Offline
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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..

Mopar Performance
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
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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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
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
Joined: Feb 2003
Posts: 1,523
Oakley CA
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69charger440_6pa Offline OP
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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
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
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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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
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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moparniac Offline
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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
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
Joined: Feb 2003
Posts: 1,523
Oakley CA
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69charger440_6pa Offline OP
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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
Re: Crank case evac on street/strip car. Help me out please [Re: 69charger440_6pa] #212056
02/02/09 07:15 PM 02/02/09 07:15 PM
Joined: Feb 2007
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moparniac Offline
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40... hmmm..... how much are vac pumps...

Mopar Performance
Re: Crank case evac on street/strip car. Help me out please [Re: moparniac] #212057
02/02/09 07:20 PM 02/02/09 07:20 PM
Joined: Feb 2003
Posts: 1,523
Oakley CA
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69charger440_6pa Offline OP
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Quote:

40... hmmm..... how much are vac pumps...



Im not saying expect to see 40HP, but they do add some power. A complete kit can set you back a grand

1969 Charger R/T under construction
2014 Ram 3500 Cummins
2006 Corvette Z06
2015 Corvette Z06
2014 BMW M5
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
Joined: Feb 2007
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moparniac Offline
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Ill just get a monte smith N2O setup for that much..... yowza.....

Mopar Performance
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
Joined: Jan 2007
Posts: 780
Woodinville, WA
Viol8r Offline
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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!

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
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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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
Re: Crank case evac on street/strip car. Help me out please [Re: MR_P_BODY] #212061
02/02/09 08:21 PM 02/02/09 08:21 PM
Joined: Feb 2007
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moparniac Offline
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Quote:

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




how will you know if it fails ???

Mopar Performance
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
Joined: Jan 2003
Posts: 9,116
Falconer, NY
KatFysh Offline
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KatFysh  Offline
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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..
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
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Romeo MI
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)

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
Joined: Feb 2003
Posts: 1,646
Ontario,Canada
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firefighter3931 Offline
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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
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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moparniac Offline
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whats the point of a PCV then if the header evac dont work....

Mopar Performance
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