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George-

Did you test with a SIR and a Power Commander setup? Just curious if this might solve the problem or not. What diameters of SIR were you using? Flate plate or nozzle?

It seems to...

It would be very difficult to cheat the actual SIR. A simple diameter check can be preformed with a go/no-go type gauge to ensure compliance. Flexible membranes would be rather easy to catch. ...

I'm not exactly sure, but I would assume that the mixture would go very rich. I'm really not farmiliar with the power commander, but I think the lack of available air would be out of its tuning...

Ok, I'll chime in here... During my FSAE time I did a project optimizing our inlet restrictor and spent a LOT of time in front of the computer, NC lathe, flowbench, and dyno. Throughout the project...

Limiting fuel flow and limiting air flow will accomplish exactly the same thing, though I would much rather have excess fuel than excess air. It's a lot harder to ruin your engine running rich than...

There are ways to cheat a SIR as well... If someone really wants to cheat, they can always find a way. It just might be a little more difficult with the SIR.

I personally like the idea of a...