EXHAUST WRAP

stivh · Two Stroke Sniffer Joined: 19 May 2005 Karma :

Reading one of those motorsport magazines at present and came upon the subject of exhaust wraps

Apparently using this item reduces engine temps which improves exhaust scavenging thus intake temps are reduced which in turn increases the exhaust gas velocity and adds up to power gains all round on the engine. (I appreciate this is under a bonnet).

Also the hotter exhaust headers(down pipes) get rid of the gases quicker through the decreased density = more power.

Considering most down pipes are partially hidden under front fairings /belly pans of various types/degrees.

Can exhaust wrap be of any use on a bike? Lower temps/cooling on the engine air flow is obvious, plus non of that crud and blue fouling of what was once a bright chrome pipe.

No doubt bright and interesting colour combinations can be purchased from somewhere. (graphite,copper,egyptian mummy)

Any one tried or used it and would it be any good as a usable and servicable item on a bike?
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DucatiEVO · Could Be A Chat Bot Joined: 02 Sep 2005 Karma :

I used to use it on my bike, but if you get the stuff wet and don't allow it to dry itself out, then it will cause your stock pipes to rust after a period of time.

Tis fine in an engine bay as that's out of the elements. I'll be using it for the manifolds on my truck. Thumbs Up

Stuff isn't cheap though, Thermotech Copperwrap is something like £60+ for 2" wide, in a 50ft length (which doesn't go far as you need to overlap the stuff).
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loply · World Chat Champion Joined: 24 Mar 2004 Karma :

Personally, I think my exhaust works fine as it is. Confused

If I ever wanted extra power, I dont imagine thats where Id begin.

I'm of the oppinion that if youre going to do something, do it properly. 1 or 3 dubious horsepower here or there for £50 and an afternoons work is wasted energy imo - On the other hand, new cams, a rebore or nitrous most definately wouldnt be Twisted Evil

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DucatiEVO · Could Be A Chat Bot Joined: 02 Sep 2005 Karma :

I don't do it for power, I do it to keep the heat in the pipes and not roasting everything in the engine bay! Laughing

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MikeH · Brolly Dolly Joined: 10 Dec 2005 Karma :

The original American Hotrodders used to use it on their choppers but that's the only time I've heard of it being used on a bike.

As for water getting on it and rotting the exhaust given the temp of the pipes it'll dry out in a few minutes so I don't see it being a big problem although it's probably not worth it for the extra .0001 hp you might get Wink

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