I've read about people wrapping the exhaust from head to tail.How much do you guys think that will improve cooling efficiency?

 

I've wrapped my exhaust on my 250, but it was to help keep it from melting my plastic. Haven't noticed any gains from it.

 

The 2 main reasons for wrapping the exhaust are 1: keep radiated heat from other parts, and 2: by keeping the heat in the pipe,you increase the velocity of the exhaust,which increases the flow out, keeping the burnt gases out of the combustion chamber,allowing it to fill with fresh air/fuel mix, so you would see a small increase in power,depending on the motor and what was done to it.

 

I ended up with an 8 foot piece of header wrap from another project. I wrapped my pipe from the head to the front of the muffler. Noticed an immediate increase in acceleration. my buddies bought a 50 ft length of the wrap and did 4 quads with it. They noticed a difference too. Worth the effort and cheap power!!!

 

jet-hot.com the first and last thing you need to know about exhaust thermal effeciency. Leave the hockey tape for the sticks, and go with something that looks good on your pride and joy.

 

That site seems fine but do you know if there is a signifigant abient heat reduction with jet-hot as opposed to the thermally insulating exhaust wrap? On my machine pretty doesn't matter. The only part of the exhast you can really see is the can.

 

We used the heat wrap on our turbo race cars with great success. It will dramatically reduce temps, the only drawback is it will cause your pipe to rust out over a period of time. Just wet it and pull it tight as you wrap, once it dries it will pull extremely tight. Heat will no longer be a problem and helps keep the exhaust temp high in the pipe for better scavaging. not pretty but effective.

 

On those that replied where it helped performance, were those 2 strokes or 4? I have wrap left over from my 250 project that I could use on my 500 if it works. Also the company that sells the wrap I bought also sells a wrap coating that I bought as well. It sprays on and dries black. It would look much better than the rusty header thats on my 500 right now.

 

I've only done 4 stroke 350 Wolverines. One of my buddies did his 400EX with positive results. The principle is the same-hot air moves faster than cold air. I did it first on the Cummins in my Kenworth!!!

 

Grim....The low down begins on page 76 of the November issue of ATV Sport. I wouldn't suggest using it if it didn't work. They coat inside and out.