I am slowly getting the RV4 panel whipped into shape.
I am not a fan of electronic flight instrument
as you can tell. Especially most of the older
systems that show only one parameter at a time.
Both the RMI and the AV8 are now out of biz.
When I look at the panel I would like to see
what I need to see without pushing a lot of buttons.
Also the older LCD's are hard to read in regular lighting
let alone bright sunlight

The Auto Meter Air/Fuel Ratio meter is out and out useless.
It uses a narrow band cheap O2 sensor that is either
rich or lean. How rich or lean who knows.

It oscillates between rich and lean and you are supposed
to understand that if it is 50 50 you have stoichiometric.
14.7:1. If you are tuning Tracy's ECx that is totally
unacceptable. You need numbers that tell you exactly
what the mixture is.

Does anybody have a wide band mixture monitor?
If so tell us how well it works.
I am now in the market for one.

Paul Lamar

Paul

What about that TechEdge unit I loaned you for your dyno project??

Robert

I have that sitting here right in the office. I'll take another
look. I don't see a read out for it. Did you send a read out?
Do you want it back?


Paul Lamar


I will bring my Innovate wideband equipment tomorrow. Maybe you can
read up
on it and plug it in to your tablet. It is designed to be used to tune
megasquirt, but I'm pretty sure the sensor can be stand alone within the
megatune software. You would need to run it through a megasquirt II unit,
which I will bring.

The Innovate LC-1 kit is fully stand alone, and appears to cost about
$150.

Ed Carver

You can help me take the RV4 over to tie down area and we will run it up
at full power. It is a little tricky getting it in and out of the hangar
so it takes two people. Does the wide band sensor fit in the same welding
bung as the ordinary O2 sensor?



BTW I just had a TC idea. Since we are building our own gear boxes the
input shaft can be made longer.
This might work best on a pusher where leaking exhaust gases are
harmlessly carried away by the air stream. Super simple turbo compound.

We can start by welding our own crude non optimized turbine out of short
sections of 321 SS tubing. Works best with an RX8 engine as the exhaust
is cooler and there are three simple exhaust nozzles.

If the OD of the turbine is larger than the engine a special
tubing space frame motor mount can be built to support the gear box.

I'll draw something up in the next couple of days.

If we can improve the BSFC 10% that will put us at .423
very respectable BSFC. That will also add 10% to the range.


Paul Lamar

Hi   Paul,
                     Try this mob, I have found the Air/Fuel ratio very
easy to read, http://www.innovatemotorsports.com/products/g4_gauge.php,
I also have the digital version but it jumps around. I ahave been using
this gauge with the wideband O2 sensor, and it responds instantly to
changes in mixture settings.
             John Burey

That is the one Ed has. It is about $50 more money than the PLX.

Paul Lamar


I knew you'd figure out something to turbocompound without a dyno.  Don't stop there

Van