ESE's works engine tuner

**wobbly** · 24th January 2025, 09:46

Math apart - do not be focused on the Hp/Torque graphs " crossing " at 5252 - that is a completely irrelevant but automatic metric.
Set the scales such that they are the easyest to read and interpret , having a wider scale on Torque can reveal subtleties not seen when the Y scale is compressed
to include Nm that are not even used on track and thus are not needed when dyno testing.

**ApolloMotoMoto** · 25th January 2025, 09:31

Originally Posted by ApolloMotoMoto

Can someone please check my math and give me a positive confirmation that I = (k)mr^2 only works with SI units for the purpose of using in the formula T=Ia?

I figured it out!

It doesnt work with pounds because the pound is not a unit of mass (m) its a unit of weight.

The Imperia SI unit for mass is the slug.

This is the first time I have ever heard of a slug.

1 Slug = 32.17 pounds

Thus;

lds/32.17 = slugs

If you use slugs per square feet for the I in: T=Ia;

The resulting T will be in pound feets.

If you use kilograms per square meter for the I in : T=Ia

The resulting T will be in newton meters.

When I do the conversion of 280 lds per ft^2 to 8.75 slugs per ft^2 all of the numbers agree weather I use Imperial or Metric inputs in the motion physics formulas.

Kilograms per square meter of Inertia comes out as Newton Meters of Torque.

Slugs per square foot of Inertia comes out as Pound Feet of Torque.

We are re-conducting the drop-test using string wrapped around the flywheels axle shaft, with a pulley at the top of the garage for the longest fall distance we can make happen.

Thank you very much to everyone's assistance!

**Pursang** · 25th January 2025, 10:34

There are really good reasons that Science and the rest of the world use the metric system (S.I. Système international d'unités.)

**F5 Dave** · 25th January 2025, 17:49

Michelin tyres and the SI system. Best things to come out of France.

**diesel pig** · 25th January 2025, 17:55

Originally Posted by F5 Dave

Michelin tyres and the SI system. Best things to come out of France.

You mean the only good things ever to come out of the land of terrible latin.

**husaberg** · 25th January 2025, 18:43

Hi I was talking to a gentleman today at Ruapuna
He asked about what aluminium to use for sleeves to be plated.
Also about CF rotary valves and clearances.
He has posted on here.

I remember either Wob, Neil , Rob, or maybe Yow using specific a grade I think 2040? or similar that was fee matching an took the replating well?
I had a man look but TBH I am beat after only a few hours sleep and 600km travel today.

Good to see the Kr250 out looking all green and mean and a fair few TZ or close analogues.
My son is finally running comparable times on the Honda well......4t compared to the old Supermoto.
clean holeshot in all races and clean and tidy lines with the bike staying on the track.
I was hoping to catch up with DP. but missed him.

**husaberg** · 25th January 2025, 18:47

Originally Posted by F5 Dave

Michelin tyres and the SI system. Best things to come out of France.

Didn't they invent the white flag or at least popularise its use? Pretty sure they also did a lot of developments work with scuba diving, limpet mines and zodiac dinghies...

**F5 Dave** · 25th January 2025, 18:58

As I get older and more exposed to the Internet I realise that people are people and generally good sorts. It's the government's that tend to cause the trouble, and their's have been dreadfully damaging.

**Peter1962** · 25th January 2025, 23:20

Originally Posted by husaberg

Didn't they invent the white flag or at least popularise its use? Pretty sure they also did a lot of developments work with scuba diving, limpet mines and zodiac dinghies...

They are great neighbours, but when it comes to inventing really important stuff they are no match.

https://www.compass-group.be/en/stor...gian-invention

**Storbeck** · 26th January 2025, 04:00

Can't argue with the waffles. And FN Browning.

LeMans should count for something I suppose?

**F5 Dave** · 26th January 2025, 07:26

And the croissant. . . Oh. That's from Austria.

**katinas** · 26th January 2025, 08:42

Originally Posted by husaberg

Hi I was talking to a gentleman today at Ruapuna
He asked about what aluminium to use for sleeves to be plated.

Heat treated A6061 T6 containing magnesium and silicon as its major alloying elements and easy to find.

**wobbly** · 26th January 2025, 18:35

Yes 6061 T6 in 8mm is what I will be using for the added plate on top of the KR180.
Is not available in 8mm plate so was sliced off a 127mm bar , CNC machined and bored /drilled to suit.
It has 0.2mm extra height to be take off after welding around the bore and the water jacket