ESE's works engine tuner

[husaberg]

Large pilot jet did not help.
Large main jet did not helped either.
The engine run rich for the first two laps, then really good for four laps,
but the race ended on the sevent lap.

In March 11 1995 - I promised to the 'GOD of POWER' to never ever again
racing with a fan cooled engine.

Whats the class fuel rules?

[Viking]

Whats the class fuel rules?

Pump gas - unleaded.

[wobbly]

Sadly I have absolutely no compassion for you what so ever.
There is absolutely no excuses for that to happen, if its mad rich everywhere, then another element of the tune is 100 Km away from being optimum.
You only have fuel, ignition and timing to look at.
That amount of detonation would have dropped the EGT a huge amount, you could have easily stopped before it created havoc if you were watching the gauge connected to a fast probe.
Tough love buddy.

[Viking]

Sadly I have absolutely no compassion for you what so ever.
There is absolutely no excuses for that to happen, if its mad rich everywhere, then another element of the tune is 100 Km away from being optimum.
You only have fuel, ignition and timing to look at.
That amount of detonation would have dropped the EGT a huge amount, you could have easily stopped before it created havoc if you were watching the gauge connected to a fast probe.
Tough love buddy.

I have no compassion myself for me. The race was the last for the season,
in a support class for a competiton in European Championship,
so nothing to lose for me as my Swedish race season was already over.

I raced the engine the whole season without any trouble.
In winter time the ambient air temperature is -10°C or lower, and includes snow-smoke, that gave enough cooling.
The race in springtime of March had air temperature of +10°C with no snow particles in it.
It´s a two cylinder engine, with the cooling fan on the right side blowing diagonally
over the heads and trough the cylinders fins.
Airflow around the left halves of head and cylinder on the engine left side are limited.
The overheated piston shows the main damages diagonally on the left side.
The right cylinder piston of the engine has no damage at all.

I only use EGT during testing, never in race events.
It did not came as a surprise, I knew that the warm weather would be a problem for my engine...

[husaberg]

Pump gas - unleaded.

What Wob said, but Does your rules allow for e10 or suchlike?
Alcohol buys you leeway both in tuning latitude as it tolerates mixtures being ballpark as long as its over-rich, its also very forgiving into adding lipstick to a thermal pig that a AC2T engine is.

[F5 Dave]

Sounds like a good case for an intelejet and plug egt back in. Twist more fuel in.