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powerflow muffler

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cloudvalley(at)comcast.ne
Guest

Posted: Sun Sep 28, 2014 3:21 pm Post subject: powerflow muffler

Hello,



  We are wondering if the powerflow muffler has resulted in a marked fuel/performance improvement for anyone who has one installed on their AA5B in the group?

 Thanks.

 B& R



 [quote][b]

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BILL9725(at)AOL.COM
Guest

Posted: Sun Sep 28, 2014 4:46 pm Post subject: powerflow muffler

Hi 

  

 I am sure there are plenty of us with the Power Flow and we can pile  on.  But here is my little piece, installed power flow with Jaguar Cowling,  so have to be careful about what effect each had.  But some general  assumptions. 

  

  1.  Engine runs a lot smoother, seems to even out the pulses and  of course reduce fuel burn.  At both 70-75% at almost all altitudes,  from 10.9 hr to 9.5, gph,of course a lot had to do with the outstanding cowling,  but same power output and that much savings really means it is real. 

  

  2.  On take off before even with strong engine would have to  gather itself up after lift off before climb would  establish.  Now  lift off is much faster than before and climb starts right off the runway.   Climb rate at 90 knots went from usually book, 750-850 depending on weight, now  1000-1,200 with same conditions.  Climb at altitude up even better, over  6,000 ft before 600-700, now 800-1,000 same speeds. 

  

  3.  Actual speed, impossible to say, because of extra  improvements but easy to say over 6 knots below 6000, over 10 knots above Can  easily reach 150 knots over 5,000 ft.  Max altitude before with strong  engine, easy to reach 14,000, now so far beyond that have not had OX on board to  find out. Can hold 2,700 RPM well past 13,000.  Summer in CA central valley  would require extra cooling, now not necessary, probably all due to  cowling.  Originally when trying to lean to peak on JPI, max lean in summer  would make CHT rise all during flight, now no difference, and before LOP was  impossible, now can be easy to reach, before lean too far and CHT would start  going nuts, now can lean to quit and no CHT changes.  

  

 So is it worth it?  You be the judge.  Do see Gary at AU Country  for best deal though.  

  

 Bill Stigile

  

  

  In a message dated 9/28/2014 4:21:53 P.M. Pacific Daylight Time,  cloudvalley(at)comcast.net writes:

  	  Quote: 	
		        Hello,



    We are wondering if the powerflow muffler    has resulted in a marked fuel/performance improvement for anyone who has one    installed on their AA5B in the group?

   Thanks.

   B& R



 	  Quote: 	
		  



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 [quote][b]

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