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TMXIO-540 and GAMI injectors

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amekler(at)metrocast.net
Guest

Posted: Mon Oct 04, 2010 4:46 pm Post subject: TMXIO-540 and GAMI injectors

Kelly,

 My flow divider went out to Mattituck and was cleaned and sent back and I

was told it was all set. I flew the plane with the GAMIs cylinder 5 with the

J(richest injector)  and cylinder 3 with the A (leanest injector).

 My results are as follows. Cylinder 1 peaked at 11.4 gal cylinder 2  at

11.4 cylinder 3 at 10.5  cylinder 4  at 11.1 cylinder 5 at  12.2 and

cylinder 6 at 11.4.

As you can see this is similar to what I had before the fuel divider was

serviced. Any thoughts  on what is going on?

Alan

 



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Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Mon Oct 04, 2010 5:04 pm Post subject: TMXIO-540 and GAMI injectors

Obviously #3 and #5 are your outliers. The question is why. I'd see what GAMI has to say on the data. Somehow, either the injector on 5 isn't what it says it is, or the cylinder is getting significantly more air some how. Is the engine rough when you get all the way to #3 peaking?

 

On Mon, Oct 4, 2010 at 8:42 PM, Alan Mekler <amekler(at)metrocast.net (amekler(at)metrocast.net)> wrote:

[quote] --> RV10-List message posted by: "Alan Mekler" <amekler(at)metrocast.net (amekler(at)metrocast.net)>

 

 Kelly,

  My flow divider went out to Mattituck and was cleaned and sent back and I

 was told it was all set. I flew the plane with the GAMIs cylinder 5 with the

 J(richest injector)  and cylinder 3 with the A (leanest injector).

  My results are as follows. Cylinder 1 peaked at 11.4 gal cylinder 2  at

 11.4 cylinder 3 at 10.5  cylinder 4  at 11.1 cylinder 5 at  12.2 and

 cylinder 6 at 11.4.

 As you can see this is similar to what I had before the fuel divider was

 serviced. Any thoughts  on what is going on?

 Alan

 

 

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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD

amekler(at)metrocast.net
Guest

Posted: Mon Oct 04, 2010 5:20 pm Post subject: TMXIO-540 and GAMI injectors

Kelly,  

Everything pointed to the fuel flow divider and this was sent out and serviced but despite trying to get cylinder 3 to run leaner and cylinder 5 to run richer the GAMIs have failed. The only other thought I had was that maybe the EGT probes were swapped on cylinder 3 and 5???   

Alan  

         

  

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Kelly McMullen

 Sent: Monday, October 04, 2010 8:58 PM

 To: rv10-list(at)matronics.com

 Subject: Re: TMXIO-540 and GAMI injectors  

  

   

Obviously #3 and #5 are your outliers. The question is why. I'd see what GAMI has to say on the data. Somehow, either the injector on 5 isn't what it says it is, or the cylinder is getting significantly more air some how. Is the engine rough when you get all the way to #3 peaking?    

On Mon, Oct 4, 2010 at 8:42 PM, Alan Mekler <amekler(at)metrocast.net (amekler(at)metrocast.net)> wrote:  

--> RV10-List message posted by: "Alan Mekler" <amekler(at)metrocast.net (amekler(at)metrocast.net)>

 

 Kelly,

  My flow divider went out to Mattituck and was cleaned and sent back and I

 was told it was all set. I flew the plane with the GAMIs cylinder 5 with the

 J(richest injector)  and cylinder 3 with the A (leanest injector).

  My results are as follows. Cylinder 1 peaked at 11.4 gal cylinder 2  at

 11.4 cylinder 3 at 10.5  cylinder 4  at 11.1 cylinder 5 at  12.2 and

 cylinder 6 at 11.4.

 As you can see this is similar to what I had before the fuel divider was

 serviced. Any thoughts  on what is going on?

 Alan

 

 

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Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Mon Oct 04, 2010 6:31 pm Post subject: TMXIO-540 and GAMI injectors

Certainly a possibility, since they are adjacent cylinders. Does the 

engine behave like it has a lot of imbalance between cylinders or no? 

I'd certainly try swapping those two probes. It will tell you if they 

are reading correctly or are swapped. Something is swapped, because your 

results are the reverse of what you would expect with those nozzles. 

Other option, if easier, would be to swap injector nozzles between those 

two cylinders. It will either get a lot better or a lot worse.

On 10/4/2010 9:16 PM, Alan Mekler wrote:

[quote]

 Kelly,



 Everything pointed to the fuel flow divider and this was sent out and 

 serviced but despite trying to get cylinder 3 to run leaner and 

 cylinder 5 to run richer the GAMIs have failed. The only other thought 

 I had was that maybe the EGT probes were swapped on cylinder 3 and 5???



 Alan



 ------------------------------------------------------------------------



 *From:* owner-rv10-list-server(at)matronics.com 

 [mailto:owner-rv10-list-server(at)matronics.com] *On Behalf Of *Kelly 

 McMullen

 *Sent:* Monday, October 04, 2010 8:58 PM

 *To:* rv10-list(at)matronics.com

 *Subject:* Re: TMXIO-540 and GAMI injectors



 Obviously #3 and #5 are your outliers. The question is why. I'd see 

 what GAMI has to say on the data. Somehow, either the injector on 5 

 isn't what it says it is, or the cylinder is getting significantly 

 more air some how. Is the engine rough when you get all the way to #3 

 peaking?



 On Mon, Oct 4, 2010 at 8:42 PM, Alan Mekler <amekler(at)metrocast.net 

 <mailto:amekler(at)metrocast.net>> wrote:



 

 <mailto:amekler(at)metrocast.net>>



 Kelly,

  My flow divider went out to Mattituck and was cleaned and sent back and I

 was told it was all set. I flew the plane with the GAMIs cylinder 5 

 with the

 J(richest injector)  and cylinder 3 with the A (leanest injector).

  My results are as follows. Cylinder 1 peaked at 11.4 gal cylinder 2  at

 11.4 cylinder 3 at 10.5  cylinder 4  at 11.1 cylinder 5 at  12.2 and

 cylinder 6 at 11.4.

 As you can see this is similar to what I had before the fuel divider was

 serviced. Any thoughts  on what is going on?

 Alan

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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

amekler(at)metrocast.net
Guest

Posted: Tue Oct 05, 2010 1:38 am Post subject: TMXIO-540 and GAMI injectors

Kelly,

 Thanks for the advice. I'll keep you posted. Here is an excel spread sheet

of that last flight.

Alan



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amekler(at)metrocast.net
Guest

Posted: Tue Oct 05, 2010 3:07 pm Post subject: TMXIO-540 and GAMI injectors

Kelly,

Tested the EGT probes with a heat gun. All are reading correctly. Spoke to

GAMI. They can't figure out what's going on but will try an even richer

injector for 5 and an even leaner injector for 3. To be continued.

Alan



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