Heat Wrap

[askmrjesus]

Originally Posted by No Worries

The next day he took the bike out and the gauge registered hotter. We cut the fiberglass off after that. We're not sure why the bike didn't run cooler.

Exhaust wrap is actually meant to increase the exhaust and header gas temps.

Since an engine is basically a big air pump, the faster you can move the air, the faster the engine goes, (up to a point).

The idea behind exhaust wrap, is to heat the exhaust so that the density of the exhaust decreases. The lower the density, the faster lower temp intake gases will flow towards it. It's like wind at the beach. The hotter the land mass, the faster the wind will blow cooler air on shore.

Problem is, the hotter exhaust gas, means a hotter pipe, which means a hotter head and cylinder, which means you've gone backwards in the cooling department.

JC

[pauldun170]

Originally Posted by askmrjesus

Exhaust wrap is actually meant to increase the exhaust and header gas temps.

Since an engine is basically a big air pump, the faster you can move the air, the faster the engine goes, (up to a point).

The idea behind exhaust wrap, is to heat the exhaust so that the density of the exhaust decreases. The lower the density, the faster lower temp intake gases will flow towards it. It's like wind at the beach. The hotter the land mass, the faster the wind will blow cooler air on shore.

Problem is, the hotter exhaust gas, means a hotter pipe, which means a hotter head and cylinder, which means you've gone backwards in the cooling department.

JC

...

[askmrjesus]

JC

[No Worries]

Originally Posted by askmrjesus

Exhaust wrap is actually meant to increase the exhaust and header gas temps.

Since an engine is basically a big air pump, the faster you can move the air, the faster the engine goes, (up to a point).

The idea behind exhaust wrap, is to heat the exhaust so that the density of the exhaust decreases. The lower the density, the faster lower temp intake gases will flow towards it. It's like wind at the beach. The hotter the land mass, the faster the wind will blow cooler air on shore.

Problem is, the hotter exhaust gas, means a hotter pipe, which means a hotter head and cylinder, which means you've gone backwards in the cooling department.

JC

That sounds right. He just saw the temp gauge higher. I don't think he noticed if the bike was any faster.

[askmrjesus]

Originally Posted by No Worries

That sounds right. He just saw the temp gauge higher. I don't think he noticed if the bike was any faster.

Any gains in performance would be modest at best.

JC

[derf]

Originally Posted by askmrjesus

Any gains in performance would be modest at best.

JC

What crack are you smoking? That .05 hp gain from the wrap adds enough go to make rossi run for his money