 Dyno FAQ
Why should I dyno tune my car?
Well that's a good question, I mean it runs pretty good from the
factory doesn't it..? Yes. Could it be better? Absolutely! Would I
notice a difference? Yes. Vehicles from the factory tend to run too
rich and that means you're wasting fuel! A motor that's tuned properly
will make more power and use the least amount of fuel to do it.
Will dyno tuning hurt my motor?
No. It's no different than driving your car on the street. The whole purpose of a dyno is to simulate road conditions as closely as possible.
What is an eddy current dyno?
Eddy current dynos use a type of electric motor as an absorber to
effectively load down the rollers to simulate roadload and driving
conditions.
I had my car tuned on an inertia only dyno. Why does it seem to run to rich now?
This is precisely why all dyno tuning should be done on an eddy current dyno. An
inertia only dyno does not have the ability to load the engine properly
and simulate driving conditions. The hp and torque calculations are
being made by the computer and in simple terms it has a given mass (the
dyno drum) and figures out that if the drum can be spun up at a certain
rate of speed by the rear wheels of your car then the car produces this
much hp.
An eddy current dyno like the superflow has a load sensor or strain
gauge attached to the absorber and it takes it reading from here, when
the car is loaded down by the eddy unit the strain gauge will give an
accurate reading of how much torque is being produced from the vehicle,
HP is just a simple math equation once you have a precise torque figure
Inertia dynos are really only good for giving hp/tq numbers, as the
mass of the drum remains constant and there's no way to load the engine
down. So you have a drum that has to be pretty generic because you
will see anything from front wheel drive vehicles that make 120hp to
rear wheel drive vehicles that make up to 1000hp, that have to all be
able to spin up this drum. a very heavy drum would be more precise for
high hp applications, but then a low hp car would never get it rolling,
and vice versa.
I have a diesel truck, why do I need to run it on a superflow dyno?
The absorber unit on the superflow weighs over 1000 lbs. It has the
ability to load a diesel and simulate a truck pulling a heavy load.
Most other dynos on the market have tiny little absorber units that can
barely load a moderate hp car effectively. Not much discussion here. It's that simple
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