REFLECTOR: EGT Temps

[Sid Knox]

Alright, all this is starting to get a little silly....
The originating thread was from John Dibble asking about a Franklin engine in an airplane.
Not an automotive system.  Not the yet-to-be-finished GAMI system.  Not an experimental, one-of-a kind system.
Yes, my Jeff Rose EI senses MP.  So what?  This is not what I was speaking of when I objected to Scott Derrick's post.

So, staying on subject....
I (still) find  ( Scott's) statement incomprehensible. (copied here for reference):

> With some EI's you can
> run LOP with stock injectors because the EI can advance or retard
> to provide the best burn for that RPM and power setting.
>  
 > Scott

Certainly the EI can "advance or retard" but by it's self, has no capability to "provide the best burn for that RPM and power setting".

1) the EI knows nothing about mixture.
    Yes, it senses MP.  MP knows nothing about where you have the Red Knob set.
2) the EI knows nothing about "best burn".
    The EI is doing neither exhaust gas analysis nor "ionic cylinder pressure sensing" and 
    has no clue how well (or poorly) the mixture is burning.
3) the EI cannot modify cylinder timing on an individual basis.
    The EI, after using the inputs available to it (rpm, MP, temperature(?)), fires all of the cylinders with the "calculated" timing advance.

Sid Knox

********************************************************************

----- Original Message ----- 
From: "Tom Martino" <tmartino at troubleshooter.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Friday, April 29, 2005 8:37 AM
Subject: RE: REFLECTOR: EGT Temps 


My ignition modules have MP inputs for this very function.  

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of michalk
Sent: Friday, April 29, 2005 7:16 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: EGT Temps [heur]

Electronic Ignition, or Injection?  I'm assuming Injection.

I don't know about the aviation units, but most of the experimental ones

can do 1, and 2 below.  The SDSefi guys support aviation, and have a 
couple of untits flying.  They are batch fire, and don't do #3.  The 
Autronic, which I have does have per-cylinder tuning capability.

After I', flying and have worked out the bugs from most of my 
electronics, I plan on implementing ionic cylinder pressure sensing.

Sid Knox wrote:
> I find that statement incomprehensible.
> 1) the EI knows nothing about mixture.
> 2) the EI knows nothing about "best burn".
> 3) the EI cannot modify cylinder timing on an individual basis.
> 
> Sid Knox
> 
> 
> 
> ----- Original Message -----
> From: "Scott Derrick" <scott at tnstaafl.net <mailto:scott at tnstaafl.net>>
> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org 
> <mailto:reflector at tvbf.org>>
> Sent: Thursday, April 28, 2005 9:56 PM
> Subject: Re: REFLECTOR: EGT Temps
> 
>  > With some EI's you can
>  > run LOP with stock injectors because the EI can advance or retard
>> to provide the best burn for that RPM and power setting.
>  >
>  > Scott
> 

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