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AFP Fuel Injection

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dean.psiropoulos(at)veriz
Guest

Posted: Mon Nov 24, 2008 8:47 pm Post subject: AFP Fuel Injection

You folks that have Airflow Performance Fuel Injection with purge valve....

What is the easiest way to start the engine?  I have been using the official

AFP procedure but you have to juggle the mixture and throttle after the

engine catches (and before it quits again)!! Nothing against Don's

procedure, I just wondered if there might be a way to get a good start with

less monkey motion?!  Any thoughts?



Dean Psiropoulos

RV-6A  N197DM

First flight yesterday (.5 hours)!!!

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rv8a2001(at)yahoo.com
Guest

Posted: Tue Nov 25, 2008 5:32 am Post subject: AFP Fuel Injection

Cold/hot start basicaly the same, 3~5 seconds prime, throttle at fast idle, mixture full rich. For hot, the same thing except keep the purge valve at engine cut off until it starts and then open. 



I can only think of one time in the last 5 years this did not work and that was due to not priming enough.



Your results may vary.



 Scott 

RV-8a





---

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vft(at)aol.com
Guest

Posted: Tue Nov 25, 2008 7:22 am Post subject: AFP Fuel Injection

 For cold starts: 
Purge valve open (run position) 
Throttle/Mixture full 
Boost pump until pressure rises then off 
Throttle to just above idle (looking for around 1000 rpm setting) 
Mags on and crank   

   For hot starts: 
Purge valve closed 
Throttle/Mixture full 
Boost pump on (I let it run while I get everything ready to go) 
Throttle to just above idle 
Mag on and crank 
Purge valve open when the engine fires

   

 

 

 

   Danny Melnik

 F1 N14ZM

 Rocket Factory

 Melbourne, FL

 

 

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mrobert569(at)hotmail.com
Guest

Posted: Tue Nov 25, 2008 11:19 am Post subject: AFP Fuel Injection

Dean C

  

 Its good to see that you are finally flying that thing.

  

 On the AFP system I use the same procedure for both hot and cold C and have found that it works well for me.

  

 1st: Throttle to idle C mixture to rich C and the bypass in the cutoff position (normally full out)

 2nd: Boost pump on until flow (on fuel flow meter) stablizes (around 2.5 GPH).

 3rd: Prime C by pushing in the bypass valve C for 5-10 seconds.

 4th: Pull bypass to cutoff and place throttle to full idle then forward approx. 1/4 to 3/8 inch.

 5th: put hand on the by-pass knob C make sure magneto(s) are on C and hit starter.

 6th: When engine catches C push bypass to full open and adjust throttle to 1000 RPM.  if engine doesn't catch within a couple of rotations C stop trying to start and re-prime before attempting to start again.

  

 The only time I move the mixture is to lean or richen to mixture.  Other than that it stays in the full rich position.

  

 For shutdown I set the throttle to 1000 RPM C let stablize for a couple of seconds and then pull the bypass to cutoff.  AS the engine dies I push the throttle to full open and leave it there.  That helps clear the intake area of any gas fumes and helps to reduce the chance of backfire during the next starting.  Granted C if you aren't going to start the engine for a day or so C the chances aren't great of a backfire C but the positive habit transfer oif doing the same way every time reduces the odds of screw-up.

  

 Enjoy the flying.

 

PS: We are going to be in Orlando Jan 10-17.  Maybe we can get together.

  

 Mike Robertson

 Das Fed

 Several RVs to credit

  

  

 

 	  Quote: 	
		   Date: Mon C 24 Nov 2008 23:46:12 -0500

 From: dean.psiropoulos(at)verizon.net

 Subject: AFP Fuel Injection

 To: rv-list(at)matronics.com

 

 --> RV-List message posted by: "DEAN PSIROPOULOS" <dean.psiropoulos(at)verizon.net>

 

 You folks that have Airflow Performance Fuel Injection with purge valve....

 What is the easiest way to start the engine? I have been using the official

 AFP procedure but you have to juggle the mixture and throttle after the

 engine catches (and before it quits again)!! Nothing against Don's

 procedure C I just wondered if there might be a way to get a good start with

 less monkey motion?! Any thoughts?

 

 Dean Psiropoulos

 RV-6A N197DM

 First flight yesterday (.5 hours)!!! 

 _-===================================
	




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