It could be that in Al’s state, he can get Mogas
without ethanol. Tracy, however, in Florida, can only get
it without ethanol if he buys it from specific places. Distributers that
sell it, or boat docks that sell it. It is not available from a regular gas
station in Florida as far as I know.
Bill B
For at least the last couple of years
the auto fuel I’ve been getting at the pumps (Chevron) has 5-7% ethanol. I
hear that some other brands of fuel (Mobil and ARCO) have more.
Given Tracy’s and my
experience with the earlier VDO senders suggests they have since changed
something. I’ll check mine occasionally, but I’m not too
concerned about fire since the sender is located near the bottom of the
firewall away from the exhaust side of the engine, so a few drops of fuel with
lots of air blasting through from the rad exit is not going to make a flammable
mixture.
Al
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Mark Steitle
Sent: Monday, April
12, 2010 12:38 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Fuel Pressure
sensor warning
Well then, either you're very lucky, or VDO changed
materials for their sensors.
On Mon, Apr 12, 2010 at 9:52 AM, Al Gietzen <ALVentures@cox.net>
wrote:
Could the difference be that Tracy runs
mo-gas which most likely contains ethanol?
Mark S.
I
have run mogas more than 95% of the total hours.
Al
On Mon, Apr 12, 2010 at 12:05 AM, Al Gietzen <ALVentures@cox.net>
wrote:
SO, I can no longer
recommend using the VDO pressure sensors for use on fuel systems.
Either an isolator must be used or a sensor rated for fuel exposure be
installed. I've been using one on my -4 for >7 years with no problems.
About 3 years ago VDO started putting a sticker in the pressure sensor
package saying not to use them on fuel pressure applications. I suspect
they changed something in the manufacturing process.
I’ve
had my VDO pressure sensor in service on the fuel system since first engine run
in Jan, 2004. Still doing fine. Must be they changed something
after that.
Al G