Subject: Inject or not to inject
From: Rotary Engine
Date: 2/22/2006, 12:07 AM
To: AA-me


    Paul and All, I'm building an RV8A, leading edge fuel tanks,  the
    attached photos are of the Fuel pump bracket for intank installation.
    This is in the design phase and the clecos are only to set it up.
    Please review and comment.  I don't want to build something sub par.  I
    think we can come up with solid designs to address the EFI issue.  Fire
    away.  Thanks T.W.

    Nice work Tom.
    I think you need two pumps in each tank. Lets say you run one tank
    empty.
    You are now down to no back up fuel pump.

    Paul Lamar ... No rotor no motor.

Tom,
No reason not to go injected if you do it correctly. Your using the
in-tank pump eliminates one of the biggest problems, vaporlock. I'm with
Paul on using two pumps per tank if possible for redundancy. Carbs do
have their own set of problems, though they are simpler in execution.
Use all AN hardware on the fuel lines and a quality pressure referenced
fuel pressure regulator and you will have it beat. Tuning is something
that a lot of people overlook on EFI, assuming that the sensors will
take care of everything. EFI will take some setup time, but after
mapping properly won't need to be messed with. I'm still for EFI, albeit
done right.
Bill Jepson

Speaking of tuning.
I'll tell you I was impressed when Dave Lemon slapped a 58 mm
downdraft Weber on our p-port engine and got over 240 HP right out
of the box at 6800 to 7300 RPM. I never did get the EFI to work
right on the dyno.

Paul Lamar

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