Heat wrapped test pipe and part of exhaust.
Heat wrapped test pipe and part of exhaust.
So I was getting irritated with the loud vibrations on the inside of the cabin from my exhaust and test pipe when driving so I decided to heat wrap my test pipe and the other straight part of my exhaust right before that. Took it for a drive and it killed a lot of the vibrations and feels alot better in the car!
A test pipe is "safe" in that, with a tune, it will flow very well and can help the motor to breathe. A regular cat is more restrictive and so, you'll make a little less power. of course, if it is a street car, you need a cat for emissions and the law, that's why it is a "test" pipe.
Heat wrapping, on the other hand, is open for debate. The benefits, not including some measure of vibration dampening, are lower under hood temps and by keeping the exhaust gases heated longer inside the pipe, a faster exit. (exhaust scavenging - There's some science here you can read up on) The downsides should be considered as well.
Heat wrap will retain an abnormal amount of heat and will fatigue the exhaust pipes prematurely and thus can lead to cracking on all but the very best made exhaust pieces.
Heat wrap can get wet and will hold that moisture against the pipe leading to increased corrosion. This includes SS pipes.
You should check with the manufacturer before you wrap to determine whether they support or will warranty a heat wrapped part, many will not.
Heat wrapping, on the other hand, is open for debate. The benefits, not including some measure of vibration dampening, are lower under hood temps and by keeping the exhaust gases heated longer inside the pipe, a faster exit. (exhaust scavenging - There's some science here you can read up on) The downsides should be considered as well.
Heat wrap will retain an abnormal amount of heat and will fatigue the exhaust pipes prematurely and thus can lead to cracking on all but the very best made exhaust pieces.
Heat wrap can get wet and will hold that moisture against the pipe leading to increased corrosion. This includes SS pipes.
You should check with the manufacturer before you wrap to determine whether they support or will warranty a heat wrapped part, many will not.
A test pipe is "safe" in that, with a tune, it will flow very well and can help the motor to breathe. A regular cat is more restrictive and so, you'll make a little less power. of course, if it is a street car, you need a cat for emissions and the law, that's why it is a "test" pipe.
Heat wrapping, on the other hand, is open for debate. The benefits, not including some measure of vibration dampening, are lower under hood temps and by keeping the exhaust gases heated longer inside the pipe, a faster exit. (exhaust scavenging - There's some science here you can read up on) The downsides should be considered as well.
Heat wrap will retain an abnormal amount of heat and will fatigue the exhaust pipes prematurely and thus can lead to cracking on all but the very best made exhaust pieces.
Heat wrap can get wet and will hold that moisture against the pipe leading to increased corrosion. This includes SS pipes.
You should check with the manufacturer before you wrap to determine whether they support or will warranty a heat wrapped part, many will not.
Heat wrapping, on the other hand, is open for debate. The benefits, not including some measure of vibration dampening, are lower under hood temps and by keeping the exhaust gases heated longer inside the pipe, a faster exit. (exhaust scavenging - There's some science here you can read up on) The downsides should be considered as well.
Heat wrap will retain an abnormal amount of heat and will fatigue the exhaust pipes prematurely and thus can lead to cracking on all but the very best made exhaust pieces.
Heat wrap can get wet and will hold that moisture against the pipe leading to increased corrosion. This includes SS pipes.
You should check with the manufacturer before you wrap to determine whether they support or will warranty a heat wrapped part, many will not.
that's exactly what I was thinking regarding the wrap....I think I might look in to getting something like a koolMat to put above the testpipe/exhaust its supposed to hold off about 20-25 decibles
We run a 3" exhaust from the AMS dp all the way back, single exit, no mufflers, no resonators, just an open pipe. At full throttle I can make cats cry at 50 feet, women and men alike get jittery and sweat, dogs bay towards the moon and dream of hunting... it's good.
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lmao that's sig worthy!!! but my car is a DD and I love the purr it has right now while cruising...I heard the test pipe makes the center console rattle and is much louder under the front seats...not true?
It makes it very loud and annoying. I recently just heat wrapped it but I'm planning to put dei heat coat over it too
that's what I am afraid of cause I would love nothing more than to get rid of my cat when I get a tune but it needs to be drivable every day but the heat wrap idea kinda scares me I wonder how well heat resistant insulation would work on the underbody just on top of the testpipe?
I would suggest not wrapping your exhaust. The mat idea might work but sounds like a pain and would add weight too.
An aftermarket exhaust and test pipe won't make that much performance difference without a bunch of other mods and a tune. You could just do the other mods, get the car tuned and be done with it, and the car would sound stock.
If, after your other mods, you do want to update the exhaust, do the dp and replace the cat with a High flow cat, leave the rest of the exhaust stock. A bit more flow and it will be pretty darn quiet.
An aftermarket exhaust and test pipe won't make that much performance difference without a bunch of other mods and a tune. You could just do the other mods, get the car tuned and be done with it, and the car would sound stock.
If, after your other mods, you do want to update the exhaust, do the dp and replace the cat with a High flow cat, leave the rest of the exhaust stock. A bit more flow and it will be pretty darn quiet.
OK, just for the record. I wrapped and used Dei heat coat on the Full Race manifold when we first put it on. Uhhh, it last three track days until I burned it all off. All, it looked like a bunch of snakes shedding their skins. Nice.
Better would be to have it ceramic coated for reducing under hood temps and help scavenging.
The heat paint from Dei will not completely prevent water absorption, though I think it helps. Of course, humidity and salty air (if you happen to be near the ocean) will play a role too. Of course, there's the issue with heat and premature metal fatigue, but you can sort that out with your manufacturer. Some are better than others.
If it is vibrating you might try different exhaust hangers or maybe the mat idea, or spray some sort of sound deadening goo on the underside of the car (more goo, as I suppose there is some now).
yeah, heat wrap is definitely effective, but like johnr352 said, it will cause your exhaust components to prematurely wear. i.e. your exhaust will rust or crack much sooner than the same exhaust would with no heat wrap.
have you looked into sound dampening/deadening your car? just doing the 4 doors will make a world of difference...
have you looked into sound dampening/deadening your car? just doing the 4 doors will make a world of difference...
Filling your interior with jello chocolate pudding will dampen noise and vibration too, but that doesn't mean it's a good idea over the long run...