What the hell?

[ducatilover]

Its ok, im not going to use rim tape. I couldnt handle that much power.

Very wise of you, rim tape is dangerous.

[Sable]

Take off your muffler and airbox, you'll easily double your horsepower.

[nzspokes]

Take off your muffler and airbox, you'll easily double your horsepower.

Now your just being silly.

My new jets and pods are not here yet.

[huff3r]

I always thought header wrap on motorbikes was used to cover up rusty chromed pipes? In cars it can drop engine bay temperatures.

But thats not why they do it. Look up "thermal efficiency" and you'll soon realise a hot engine bay is better (as long as the engine internals are kept cool enough to still function properly, i.e not seize, but thats what a radiator is for!). The reason race-cars use it is again to accelerate the exhaust gas flow, by super-heating it increasing scavenging performance, and in a turbo car reducing lag and improving boost characteristics.

But again, like most bikers, most boy-racers only do it for show as well. Muppets.

[sidecar bob]

Face it, header wrap is total & utter monkey spankage & appeals to the same sort of people that attatch neons to their Harleys & have tassles.
I dont count with that bunch though. I only wrapped my headers because my bike is turbo'd.

[bogan]

So it's been established it keeps hot things hot if you want, and cool things cool if you want, it also can be used to make things look good, and it increases power. All that is left to do now is....

[blackdog]

10 chars....

[scumdog]

Face it, header wrap is total & utter monkey spankage & appeals to the same sort of people that attatch neons to their Harleys & have tassles.
I dont count with that bunch though. I only wrapped my headers because my bike is turbo'd.

I've got tassles on my Harley

And zorst-wrap on the turbo-intake on my 'zuki.

What's your point??

[jonbuoy]

But thats not why they do it. Look up "thermal efficiency" and you'll soon realise a hot engine bay is better (as long as the engine internals are kept cool enough to still function properly, i.e not seize, but thats what a radiator is for!). The reason race-cars use it is again to accelerate the exhaust gas flow, by super-heating it increasing scavenging performance, and in a turbo car reducing lag and improving boost characteristics.

But again, like most bikers, most boy-racers only do it for show as well. Muppets.

People that are fitting V8´s into little engine bays would disagree that its not just for keeping the engine bay cooler and protecting things like starter motors that are placed too close for comfort to exhaust pipes. If the temperatures are so high in the engine bay its starting to seriously effect the intake charge temperatures how is that good for engine efficiency? Maybe a warm air charge is better for fuel economy but not for performance. Look up header wrap reduces intake charge temps and you´ll realise a cooler engine bay is better for performance.

[huff3r]

People that are fitting V8´s into little engine bays would disagree that its not just for keeping the engine bay cooler and protecting things like starter motors that are placed too close for comfort to exhaust pipes. If the temperatures are so high in the engine bay its starting to seriously effect the intake charge temperatures how is that good for engine efficiency? Maybe a warm air charge is better for fuel economy but not for performance. Look up header wrap reduces intake charge temps and you´ll realise a cooler engine bay is better for performance.

Thats what efficient cold air intake systems are for. As for people fitting big V8s into small engine bays, well I guess you have to make some sacrifices when you try and force something where it don't belong!

[jonbuoy]

Thats what efficient cold air intake systems are for. As for people fitting big V8s into small engine bays, well I guess you have to make some sacrifices when you try and force something where it don't belong!

How cold is that air going to be after its passed through a roasting hot engine bay?? Your still of the opinion that a hotter engine bay is better than a cool one?

[avgas]

Looks ok to me.
But its worth $2,000. I should know I have owned 4 of the bloody things.
Exhaust wrap on one is dumb. I did it and the fucking thing overheated. Turns out honda had a clue when it came to cooling it.
i.e. get rid of hot air via exhaust asap.
Last one I sold had both single and cafe seat. Went for $800.
Best one I had (would have) sold for $3500.......but tried to kill me on way to customer. That was 2004. So this is worth between $1500-$2300.

[Crasherfromwayback]

I did it and the fucking thing overheated. Turns out honda had a clue when it came to cooling it.
i.e. get rid of hot air via exhaust asap.
.

That's how it works. By super heating the exhaust gases, it's expands and rushes out the exit quicker, hence better scavenging etc. Were you running the std exhaust? Maybe it was like it had a cork up it's ass hence the over heating?

[steve_t]

That's how it works. By super heating the exhaust gases, it's expands and rushes out the exit quicker, hence better scavenging etc. Were you running the std exhaust? Maybe it was like it had a cork up it's ass hence the over heating?

I'm pretty sure the wrap doesn't 'superheat' the exhaust gases but just keeps them hot so they maintain velocity

[bogan]

That's how it works. By super heating the exhaust gases, it's expands and rushes out the exit quicker, hence better scavenging etc. Were you running the std exhaust? Maybe it was like it had a cork up it's ass hence the over heating?

From what I read on bikes without collectors it's the wave scavenging that makes up for pretty much of it, and iirc you get a much better reflection if the wave doesn't go through a temperature differential before the end of the pipe. Low pressure wave is reflected back and timed to the closing of the exhaust valve (and opening of intake) to draw that little bit extra through