Heat wrap
 

Has anyone ever used the fiberglass heat wrap under heat shields, and if so did it cut down alot on the heat against your legs

Ive only used it because I didn't have heat shields at all. Ive experienced that heat shields or fiberglass/titanium wrap are each pretty effective on their own, but never tried to combine them.. I dont know if the benefit will be worth the headache of wrapping the pipes and trying to fit heat shields over it. Also, any brackets that rub on the wrap will cut right through it, and once its cut it all unravels and needs to be redone. I could see the tabs on the back of the heat sheilds or just the edges of the heat shields being a problem.

My $.02 is to stick with the heat shields

I tried it and didnt make much difference

This will only serve to insulate the exhaust and make your engine that much hotter. Bad idea. they run hot enough as it is. If you have a cat in your exhaust, decat it or get an aftermarket head pipe without the cat. Will significantly reduce heat and will perform much better. You will also need to consider a fuel management system programmer if you change out your exhaust.

A buddy of mine did this to his 2012 Ultra. Didn't make a big enough difference. He ended up changing out his head pipe and putting SERT on it and is totally happy with it now! I have 2010 Street Glide and I just decatted mine and put on PCV but have not had it out yet.

I had fiberglass heat wrap under the heat shields of my Vance and Hines RSD Tracker exhaust and it actually made it a little worse. The gap between the heat shield allowed air to cool the heat shields while I was riding and the fiberglass wrap eliminated the air gap, which in turn eliminated the air cooling effect. I ripped the heat wrap off the pipes and it is much better now.

i tried it ,not much help,it was easy and the heatsheild clamps held it in place,BUT it rusted the head pipe bad in 2 years.went to a 2-1 and a good tune much better results.

I wrapped the stock non-cat header under the shields on my '09. Really can't tell any difference?

The exhaust system is downstream of the combustion process, external to the engine; How does exhaust wrap make youe engine hotter?

i was considering doing this only cause my exhaust is powder coated and flakes in a couple places. mostly at exhuast ports.

X2 So coated exhausts make the engine run hotter too? I don't think so!

I did this when I was running my Bassani pipe, it cooled it down a lot , the heat shields were a tight fit but went back on

I have the D&D Fatcat, the rear pipe sticks out enough to be very close to my leg when stopped. I tried wrapping it under the heatshield, it made it more tolerable on my leg.

Coated exhaust does not have any insulating quality, so no, coated exhaust will not make things hotter. While much of the heat generated from the motor is dealt with through the engine fins, exhaust also serves to help dissipate engine heat. Insulating the pipe increases the heat in the pipe which inhibits the exhausts ability to help dissipate engine heat. While there are advantages to wrapping exhaust, cooler for the rider and some performance benefits, the down sides are hotter engine and exhaust temps. In the old days before EFI and the lean fuel conditions of todays twins it was not an issue, and in fact, wrapping pipes was shown to have added TQ. If you have a tuner, like PV, that allows you to see head temps, you will see the temps will be higher with wrapped pipes. Todays EFI engines generate way too high exhaust temps as it is without adding heat by wrapping the pipes. The other downside is wrapped pipes smell, steam when they are wet and significantly reduce the life of your pipes. Some stock pipes, or poorer quality aftermarket pipes, have been known to crack at or near the exhaust port and they just plain deteriorate because of the constant high temps in the pipes themselves, particularly if the wrapping gets wet frequently. So, if you want to look cool and be cool, go for it. But there's no free lunch, there are downsides.

Ceramic is a thermal barrier, so it is an insulation of sorts, particularly when used on the inside and the outside. On the inside it prevents a lot of heat from transfering to the pipe, then on the outside it lowers the surface temp of the pipe. Any external only coating or wrap "insulates" or keeps more heat in the pipe base metal, and does create significant thermal stress for the pipe material, but keeping the pipe hotter, keeps the exhaust gas hotter, and hotter gas travles faster with less resistance, so it atually removes heat from the engine faster. Wrapping, coating, or otherwise "insulating" the exhaust does not make the engine hotter.

I'd do one or the other but not both.

Interesting. I'm putting together an exhaust system right now. Some of it pretty custom. I purchased some wrap for a 2" section to keep two pieces of pipe from touching. Really just as a barrier to prevent possible rattling. Now I have a bunch of wrap and nothing to do with it, so I starting thinking of wrapping my exhaust under the shields. Seems more think this is a bad idea than a good idea.

Here is something no one has mentioned: What about wrapping only part of the exhaust? What if you wrapped a 6" section that is closest to your leg to keep the heat away from your leg? Could this be helpful without adverse affects?