[NoDOHC]

Hey, that would be awesome! I have a set of 6kg scales that are accurate to 0.1g. All I need is a fuel pump in a jug and set it on the scales. I could only have about 2 gallons in the jug, but that is enough for a pretty long dyno run.

Actually, I have a gram scale that goes to 50kg +- 5g, maybe that would be better for this application. I could use a ten gallon fuel cell on that and make the dyno guy a little less nervous.

I have a second fuel pump that I could plumb in and it would be easy to install a couple of ball valves. This would not only provide accurate BSFC numbers, but also allow calculation of injector energizing time. It would also indicate the accuracy of the previous data collection technique.

The Mustang dyno I use is capable of maintaining steady-state load on the engine. There will still be a ?? loss in the drivetrain.

I really like this scale idea.

You saved me from purchasing a set of fuel flow meters (not cheap).

Thanks!

A note on accuracy: I know that this data is not exact, but I don't think that the error exceeds 10%. Even at that, the BSFC does not match the commonly posted numbers. As I pointed out earlier, the calculations that I made are worst-case - they do not account for the inertia of the fuel (assuming instantaneous acceleration of fuel into injectors). I did get flow test results on the injectors (they are rebuilt) and they were all within 3% of 460cc/min (whether that is true now is questionable).

The goal in using this method is to get an easy data source so that those who do not have precise measurement abilities can post data too.