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M14PEngines-List Digest: 3 Msgs - 10/19/09

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brentblue(at)wyoming.com
Guest

Posted: Tue Oct 20, 2009 5:40 am Post subject: M14PEngines-List Digest: 3 Msgs - 10/19/09

 	  Quote: 	
		  

 Time: 05:22:27 AM PST US

 From: "Brent Blue" <brentblue(at)wyoming.com>

 Subject: Carb Problems

 I have been unable to develop full power on a homebuilt with a  

 M14P.  Can only

 get fuel flow to about 16 gph (both static and high speed taxi) with  

 full rpm

 and only 24 mp.  Have checked the fuel supply and boost to the fine  

 screen and

 get up to 50 gph with the boost pump to that point.



 Is this a problem with pressurizing the carb and/or an aneroid  

 problem?



 Thanks for any help.



 Brent



 Time: 06:14:39 AM PST US

 From: "A. Dennis Savarese" <dsavarese0812(at)bellsouth.net>

 Subject: Re: Carb Problems



 Have you tried adjusting the prop governor and what type propeller  

 is on

 the engine?

 Dennis



 Dennis:


	


The prop is the standard two blade Russian one.  George Coy suggested  

on the phone yesterday to check the governor which I will do this  

weekend.



Thanks.



Brent

 	  Quote: 	
		  

 Time: 06:42:52 AM PST US

 From: "n801bh(at)netzero.com" <n801bh(at)netzero.com>

 Subject: Re: Carb Problems



 A few things to consider.

 Have you comfirmed the fuel flow numbers are correct and transducer  

 is c

 aliberated ?



 Confirmed the RPM reading is correct? have ya used an optical tach  

 to te

 st ?



 I think you have the 360 HP motor as 24" is darn close to what you  

 would

 see at DIJ's elevation, this seems to comfirm you don't have an intake

 track restriction issue either.

 If the motor is fresh and putting out 360 at sea level your 16 GPH  

 is no

 t that far off. Up here your 360 is about 295 HP or so and 17-19 is  

 the

 GPH numbers you should be seeing.

 Ben Haas

 N801BH

 www.haaspowerair.com


	


Ben:



It should get a fuel flow of about 30 gph at full throttle with a MP  

of about 32 to 34.



If you are around on Friday, come over to the west side and you can  

see an engine run for yourself!



Thanks.



Brent

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dsavarese0812(at)bellsout
Guest

Posted: Tue Oct 20, 2009 6:11 am Post subject: M14PEngines-List Digest: 3 Msgs - 10/19/09

That is where I was going with this as well.

 Dennis

 [quote]   ---

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n801bh(at)netzero.com
Guest

Posted: Tue Oct 20, 2009 6:41 am Post subject: M14PEngines-List Digest: 3 Msgs - 10/19/09

My mistake was thinking the 360 was naturally aspirated and the 400 was supercharged. I now see that both are supercharged and the 400 charger is slightly overdriven for more boost. What confused me was in the original post it said full rpm. I wonder why you didn't get 30" then.. A gear driven positive displacement blower should put out a given amount of boost at a given rpm.   I am hoping to fly over Fri to see ya. Call me with a time... Seeya. 



Ben Haas

N801BH

www.haaspowerair.com



--------

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