Engine Test stand, resistance for tuning, lamda dyno, dynamometer load

johnowhite

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It seems that all my engines like 12.3 to 12.7 air to fuel for the max useable power, under load.

I have a air fuel sensor/reader and would like to put a load on the engine to set the air/fuel mixture.

I'd like to set the jetting before it gets in the car, but need a load on the engine to get close.

I built a stand to run the engine and can fit a driveshaft into a clutch plate.

Any pictures or suggestions on how to put a load on the engine so I can set the air/fuel mixture using a lamda sensor set up to work with a computer?

I don't need and engine dyno, I don't think, just a way to put a controllable load on the engine.
 

johnowhite

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I did, gave them a call and for $10,000 they can hook me up.....But I was looking for something a little more asset conservative.

Here are some of the choices.....put a disc brake on the output shaft....This is simple and doable and is probably what should be tried first.

Put a torque converter on the output shaft.....How do you do that without getting fluid all over? Then would you put a brake on the torque converter output shaft?

Hook the output shaft up to a water pump....This could be calibrated and a real power output based upon flow or restrictions could be put together....This could get complex, but could also be simple.

What I think I want is to put a load on the engine, not to figure horsepower, but to tune it.
 

atomicjoe23

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I would suggest pursuing the water pump (also known as a water brake) route. . .this is what we used to run marine engines on dry land (can't go into any further than that. . .sorry).

I don't know exactly how they were set-up because I never saw inside of them, but I know that's what we used.

Hope that helps a little. . .I know it's not much, but hopefully it will get you on the right track.

I would think that if you had an appropriately sized water pump to run off the engine that you could use a replaceable restrictor plate (different sized orifices to control the amount of resistance to flow) to set the appropriate load on the engine.

I'm not sure if you would want a centrifugal pump which would have a variable flow rate or a positive displacement pump which would be theoretically require more power to produce the same flow rate against a greater resistance to flow.

This is where I would start. . .actually kinda peaked my curiosity now that I typed that stuff!
 
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