Heat wraps - pipes

[MaxMidnight]

Hi there, I wrapped my pipes with titanium wrap; my pipes were starting to rust. By doing so it retains the heat causing the exhaust to flow more rapidly. This in turn draws more air/fuel mixture through the carbs.
I think it make the bike look better.

Just to play devil's advocate, how do you know that this 'faster' exhaust speed is beneficial. Yamaha may well have designed the system to be most efficient at the OE speed.
Is it possible that a faster exhaust speed could lead to reversion?

The looks are a completely different matter.

 

[thunder]

Just to play devil's advocate, how do you know that this 'faster' exhaust speed is beneficial. Yamaha may well have designed the system to be most efficient at the OE speed.
Is it possible that a faster exhaust speed could lead to reversion?

The looks are a completely different matter.

Because I have a performance exhaust; Holesot 4 into 2, it definitely flows more air. I read somewhere that by wrapping the pipes, it keeps the flow more consistent resulting in a quicker exit.
I don’t think there would be any reversion. Yamaha did design the Vmax well; when changing the exhaust, it affects the carbs causing the main jets to be too rich. Even a stock Vmax is. The pilot circuit is too lean so changes are required there too.
Any advice you have would be welcome. Thanks, Gord.

 

[MaxMidnight]

My Holeshots are ceramic coated which is also meant to reduce heat loss. Any benefit from wrapping would IMO be reduced?
The point I'm making is that just because it changes the exhaust flow doesn't automaticicly mean the change will be beneficial.
You would need to gather data to demonstrate that it is.

The only advice I can offer is 'don't guess', get some base data from a dyno and make changes based on factual data.

 

[Parminio]

Hotter pipes produce hotter air. Hotter air is less dense, hence it moves faster because it takes less pressure to move it. Colder air is far more dense, so it takes more of a push to move it. That's just simple scientific fact.

On bikes, it typically only helps on larger pipes, but there's not any real power advantage to it to speak of. In a race application with camshafts ground for the scavenging effect (longer duration on the exhaust valve than the intake valve), it can help, but again not to as great an extent as it does cars that have much longer pipes.