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Breather run into exhaust
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klwerner(at)comcast.net
Guest

Posted: Wed Jun 06, 2007 8:20 am Post subject: Breather run into exhaust

Do any of you race-engine guru's out there have  any idea of how much of a vacuum one can create this way? Just curious  as to the suction effect of the exhaust venturi...

  

 do not archive

 [quote]   ----- Original

    Message ----- 

   From:    PittsS1(at)aol.com (PittsS1(at)aol.com)    

   To: rv-list(at)matronics.com (rv-list(at)matronics.com) 

   Sent: Monday, June 04, 2007 9:27 PM

   Subject: Re: Breather run into    exhaust

   



       there is positive pressure in the crank    case if you can neutralize that pressure the internal rotating parts will    spin free ... resulting in free horse power. the exhaust can create a lot    of suction and actually suck oil from the crank case ... be  careful.

       on a pumped up / modified I0-360 with a 4 into 1    exhaust i used a stainless 1/2 in tube welded into the collector at 45 degree    angle ... plus ... a metered  'pill' to get the correct vacuum pressure.    i monitored oil consumption changing the orifice size until oil consumption    was normal. the house power increase was the most notable of all previous    mods.

       yes ... a poor mans smoke system but no more oil    on the belly ... do it! lots of acro guys do ...

    

       mike

       

       



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Mark Phillips in TN

Joined: 10 Jan 2006
Posts: 431
Location: Columbia, TN

Posted: Wed Jun 06, 2007 10:54 pm Post subject: Breather run into exhaust

In a message dated 6/6/2007 11:15:46 AM Central Daylight Time, klwerner(at)comcast.net writes:

  	  Quote: 	
		  Why do you have an oil separator if you don't reuse the oil in the first place. What is the purpose of separating the oily air mix and then discard both onto the exhaust pipe???  I'd remove the weight of the useless contraption... 	


 >>>

 Re-using the oil is not the issue, which many say is a bad idea as it routes nasty stuff back into the sump- keeping the "dirty side" less so is.  Better (IMHO) to collect as much blow-by crud that might normally blow out onto yer belly and discard it with the old oil at oil change time.  See:

  

 http://websites.expercraft.com/n51pw/index.php?q=log_entry&log_id=5172

  

 Click on >>Next Entry>> for next 3 entries and on fotos for bigger view.  Here's the "proof in da puddin' ":

  

 http://websites.expercraft.com/n51pw/index.php?q=log_entry&log_id=5261

  

 Just an option, but this has really worked out quite nicely after 415+ hours operation on my plane.  Cheap, simple, effective...

  

 From The PossumWorks in TN,

 Mark

 http://websites.expercraft.com/n51pw/



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From The PossumWorks...

klwerner(at)comcast.net
Guest

Posted: Thu Jun 07, 2007 7:03 am Post subject: Breather run into exhaust

Hi Mark, 

 I fully agree with you for not putting the crud  back into the engine after separating it. Your case is different though, as  you accumulate the crud until the next oilchange and then drain  it.  

 But in Jeff's case he ran the vent tube AND the  smaller drain tube onto the exhaust to burn off everything that came out of the  breather. So my thought was why bother using a separator if both  end up on the hot exhaust anyway. I'd just run a tube  onto the exhaust and be done with it by burning both.

 Cheers,

 Konrad

  

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shempdowling2(at)earthlin
Guest

Posted: Thu Jun 07, 2007 12:20 pm Post subject: Breather run into exhaust

I agree with you Konrad.  I havent flown since I removed the return line 

to the oil filler neck and I will now place the return into a small 

glass jar just to see what come's out.



Thanks for the no brainer.



Jeff Shemp Dowling



Konrad L. Werner wrote:

[quote] Hi Mark,

 I fully agree with you for not putting the crud back into the engine 

 after separating it. Your case is different though, as you accumulate 

 the crud until the next oilchange and then drain it.  

 But in Jeff's case he ran the vent tube AND the smaller drain tube 

 onto the exhaust to burn off everything that came out of the 

 breather. So my thought was why bother using a separator if both end 

 up on the hot exhaust anyway. I'd just run a tube onto the exhaust and 

 be done with it by burning both.

 Cheers,

 Konrad

  

 do not archive

  

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Mark Phillips in TN

Joined: 10 Jan 2006
Posts: 431
Location: Columbia, TN

Posted: Thu Jun 07, 2007 2:12 pm Post subject: Breather run into exhaust

In a message dated 6/7/2007 10:05:37 AM Central Daylight Time, klwerner(at)comcast.net writes:

  	  Quote: 	
		  So my thought was why bother using a separator if both end up on the hot exhaust anyway. I'd just run a tube onto the exhaust and be done with it by burning both. 	


 >>>

 100% agreed, just offering an option- good to hear from ya Konrad!

  

 Take care & do not archive

 Mark



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From The PossumWorks...

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