How to Build an

Inertia Dyno

Why build a dyno?

We've all run into it before,looking for that extra "edge" in the engine department. However,when you go out looking for information often times what you find from various sources is confusing, and when you put it all together it sometimes contradicts itself.

How do you find out what's right or wrong,or what's right for your application??

It seems nobody has the answers you need, or they aren't telling.
Have you ever wondered....."what happens when you change this??"
Have you ever wondered which of those "25 Go-Fast Tips" in the articles really worked??

It's time to find out for ourselves..........

This is where TDKMotorsports was at a few years ago. The only way to find out what we needed was to find out for ourselves. We needed a dyno........

After looking at the options it seemed that an inertia dyno was the easiest to build (the theory was simple at least) and seemed the most accurate. But here again, the people that knew what we wanted weren't telling.
They were obviously attempting to keep us from building a dyno.

Some of the things we were told......

"That technology is too new, it's only been in this country a couple years."

NONSENSE!!!

"Them things is too complicated, change one little thing and it's all messed up."

Obviously not someone who understands how the dyno they sell commercially works.

"Your gonna need a flywheel as big as a house and 3 computers!"

Hey! We are talking kart engines here, not railroad locomotives.

"You can't use a computer within a mile of a Yamaha engine, it just won't work"

Really!!??
I've been doing it for the last 4 years,works just fine.

We heard it over and over!

What's the big deal?

The concept was simple, accelerate a load, measure the time to accelerate it, and do the calculations. All we needed was a load, and a way to collect the data. In the end it wasn't all that tough. The dyno is built, it works very well and is easy to use. We learn something new with each run, and have found out for ourselves what works and what doesn't, both on the track and on the dyno. The following pages outline all the parts and pieces and some of the things that caused stumbles along the way.

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Contact us at: TDKMotorsports
This is an informational site about the construction of a prototype Inertia dyno. Large metal objects spinning at high speeds are very dangerous and may cause severe injury or death. TDKMotorsports will not be held responsible for any damages to you or your property due to your use of the information provided on this site. By using this information you assume all responsibility for any loss or damages incurred.