[DeTomaso] FW: ANSA mufflers

[Pantera Place]

Meant  " I must be getting close to exceeding the inlet pipe restriction."

 

Mike

 

From: Pantera Place [mailto:PanteraPlace at hotmail.com] 
Sent: Saturday, May 21, 2011 9:48 PM
To: 'Pantdino'; 'detomaso at realbig.com'
Subject: RE: [DeTomaso] ANSA mufflers

 

Jim,

 

Thanks for the engineering info on the perforated pipe.  I believe the inlet
pipe at the front of the muffler has about 2.074 sq. in. of area.  The
estimated 210 3/16" holes in the perforated main pipe total about 5.88 sq.
in. of area plus the new cut outs I made.  Each cut out is about 1.25 sq.
in. for a total of 2.5 sq. in.  Any ideas on the calculations for the flow
restriction of the main pipe with the new cut outs?  I must be getting close
to exciding the inlet pipe restriction. 

 

I've thought about a sound meter, I may need to follow-up on that.  

 

Mike            

 

From: Pantdino [mailto:pantdino at aol.com] 
Sent: Saturday, May 21, 2011 8:39 PM
To: panteraplace at hotmail.com; detomaso at realbig.com
Subject: Re: [DeTomaso] ANSA mufflers

 

Mike,  

 

the resistance of airflow thru a tube is inversely proportional to the
fourth power of the radius-- so if you double the diameter of a hole the
resistance decreases to 1/16th. So yes, the resistance thru all those little
holes is much greater than thru a single  large hole.

 

What you describe regarding being disappointed with new mufflers being too
quiet is why I have not replaced the rusted-out, ratty-looking Ansas on my
car.  I like the sound and that is more important to me than appearance.

 

Do you have a sound level meter?  You can get one at Radio Shack very
inexpensively.  It would be interesting to see what levels you get behind
your car compared to a GTS, Hall, and other systems.

 

Jim Oddie



 

 

-----Original Message-----
From: Pantera Place <panteraplace at hotmail.com>
To: detomaso at realbig.com
Sent: Sat, May 21, 2011 2:57 pm
Subject: [DeTomaso] ANSA mufflers

I've been working on a series of modifications to my ANSA mufflers to
improve the exhaust flow and relieve back pressure.   The latest work is at
the bottom of this page http://www.panteraplace.com/page200.htm 
 
 
 
Mike 
 
 
 
_______________________________________________
 
Detomaso Forum Managed by POCA
 
Archive Search Engine Now Available at http://www.realbig.com/detomaso/
 
DeTomaso mailing list
DeTomaso at list.realbig.com
http://list.realbig.com/mailman/listinfo/detomaso