SuzukiSavage.com - Print Page

SuzukiSavage.com
/cgi-bin/YaBB.pl
General Category >> Rubber Side Down! >> Does a cooler exhaust improve performance?
/cgi-bin/YaBB.pl?num=1345016875

Message started by paulmarshall on 08/15/12 at 00:47:54

Title: Does a cooler exhaust improve performance?
Post by paulmarshall on 08/15/12 at 00:47:54

Hello, Does anyone know if paint of heat rapping my exhaust to cool it down, will it improve performance and fuel sussage?

Paul

Title: Re: Does a cooler exhaust improve performance?
Post by justin_o_guy2 on 08/15/12 at 01:12:06

Wrapping holds heat in. I dont know about painting. YOu wont see increased mileage by doing or not doing either one.

Title: Re: Does a cooler exhaust improve performance?
Post by paulmarshall on 08/15/12 at 01:21:53

HiPerCoat’s™ inorganic matrix provides greater protection, avoids the staining or bluing characteristics found with chrome and stainless.

This unique ceramic-aluminium coating process reduces ambient under hood temperature while increasing horsepower. Performance benefits can be attributed to: combustion chamber stabilization and reduced under hood temperature; improved air density; increased gas velocity due to the heat retaining properties of the coating; and better laminar air flow due to the elimination of oxide scale on the header’s inside diameter.

Unlike Exhaust wrap HiPerCoat™ is bonded to the part, protecting it from high temperature corrosion. HiPerCoat™ will not absorb moisture. It is coated inside and out and is recoatable.

To keep your HiPerCoat™ polished aluminium finish looking brand new HPC has developed Liquid Buff™ Polish. This specially formulated product will keep a ‘like new’ shine to your coated components.

Title: Re: Does a cooler exhaust improve performance?
Post by justin_o_guy2 on 08/15/12 at 01:31:58

This unique ceramic-aluminium coating process reduces ambient under hood temperature while increasing horsepower.

& how would that reduce Under Hood Temps?

By Holding the Heat In the pipe,,

I dont see how this translates to more power on a bike. If youre just here to spam for this pipe coating outfit, Im sure youll be gone soon,

Title: Re: Does a cooler exhaust improve performance?
Post by paulmarshall on 08/15/12 at 01:35:15

I beg your parden, I am asking a legitimate question.

Title: Re: Does a cooler exhaust improve performance?
Post by Cavi Mike on 08/15/12 at 01:35:18

The only time coating or wrapping affects performance is with turbo-charged cars. Other than that, the engine couldn't care less what happens with it once it's expelled as long as it leaves freely.

On modern cars with emission systems, it may have an effect on how fast the catalyst and O2 sensors reach operating temperature and therefore affect how quickly the ECU gets into normal operating mode - but that still has nothing to do with the engine itself - that's just the cràp attached to it.

Title: Re: Does a cooler exhaust improve performance?
Post by paulmarshall on 08/15/12 at 01:37:11

I cut that out and posted it because it says motorcycle exhaust can be painted with it. You certainly dont encourage new members to put themselves out there.

Title: Re: Does a cooler exhaust improve performance?
Post by paulmarshall on 08/15/12 at 01:38:01

In future I will not ask question here thanks to you

Title: Re: Does a cooler exhaust improve performance?
Post by paulmarshall on 08/15/12 at 01:39:03

You are a senior member and you treat new members like that

Title: Re: Does a cooler exhaust improve performance?
Post by paulmarshall on 08/15/12 at 01:40:45

Shame on you Justin. I was worried I might ask a stupid question but thought if I did I would be treated wiyh more respect

Title: Re: Does a cooler exhaust improve performance?
Post by paulmarshall on 08/15/12 at 01:43:28

I will try again if thats ok with Justin. If I use a heat reducing paint like I mentioned earlier, Would this inprove performance and fuel usage?

Title: Re: Does a cooler exhaust improve performance?
Post by justin_o_guy2 on 08/15/12 at 02:07:10

I thot you were up to something,, sorry!

Hang out, ask your questions, plenty of help to be had here..

Title: Re: Does a cooler exhaust improve performance?
Post by paulmarshall on 08/15/12 at 02:09:41

Thanks, I will try to ask better questions in future. :) :)

Title: Re: Does a cooler exhaust improve performance?
Post by Routy on 08/15/12 at 04:47:30

We treat nubys like that to see how tough they are,.....cuz only the tough survive here. You passed ! ;D

Title: Re: Does a cooler exhaust improve performance?
Post by ralfyguy on 08/15/12 at 04:57:01

555A405B47415250585641330 wrote:

We treat nubys like that to see how tough they are,.....cuz only the tough survive here. You passed ! ;D

Yeah, he ready for an oil war. ;D

Jest kidding.... ;D

Welcome Sir!

Title: Re: Does a cooler exhaust improve performance?
Post by Charon on 08/15/12 at 05:24:34

To attempt to answer the original question, and remembering we are dealing with a single-cylinder naturally aspirated engine, nothing you do to the outside of the exhaust pipe will make any measurable difference to performance. It will change nothing but the appearance of the pipe.

Title: Re: Does a cooler exhaust improve performance?
Post by spacepirates on 08/15/12 at 06:30:37

664D44574A4B250 wrote:

Agreed. On some other, high performance engines, this coating (and/or header wrap) might (*might*) have some performance benefits due to keeping heat inside of the pipe causing the gasses to stay hotter and hotter things move faster.

On the savage, this would have *no* performance benefits.

However, it could be done for aesthetic reasons, which we leave up to your discretion. I have header wrap on my bike so that I could ditch the heat shield and not worry about burning my hands/boots/pants so easily. I don't think you'd get the same insulating benefits from the ceramic coating as I imagine that'd still be mighty hot to the touch.

Title: Re: Does a cooler exhaust improve performance?
Post by teabowl13 on 08/15/12 at 06:43:01

Ceramic Coatings and fiberglass wraps, as I understand it, will have a small effect and help somewhat when you are working with a single-walled exhaust pipe; those pipes will lose heat pretty quickly.

If you were to cut a Savage exhaust header in half, you'd see that it is constructed (lord know why Suzuki went to all this trouble...) in three full layers of metal. A tube inside, with a tube around that, with another tube around that one. Those layers already do the job that any wrap or coating might do, so on a stock Savage header, it won't have any effect at all...

Build your own header, and you might have a different experience...

Title: Re: Does a cooler exhaust improve performance?
Post by teabowl13 on 08/15/12 at 06:47:10

One more thing...
Header wraps or ceramic coatings will keep the outside of the exhaust pipe slightly cooler; I don't know how much, or if you would even be abel to notice it, maybe just a few degrees, but a few folks here have used the fiberglass wrap to keep themselves from being burned by their own pipes, or to avoid melting their glossy satin polyester track suit pants while they are riding....

Title: Re: Does a cooler exhaust improve performance?
Post by greenmonster on 08/15/12 at 11:31:15

4D7C787B766E75282A190 wrote:

... to avoid melting their glossy satin polyester track suit pants while they are riding....

There's a mental image I'm not going to be able to get rid of any time soon.

Title: Re: Does a cooler exhaust improve performance?
Post by Savage_Rob on 08/15/12 at 11:40:53

0D3C383B362E35686A590 wrote:

The ceramic coating on my header makes a noticeable difference to the rider. I don't use any bolt-on or clamp-on heat shield with it at all and I don't burn my leg. Of course, I don't wear shorts and sneakers either.

Title: Re: Does a cooler exhaust improve performance?
Post by paulmarshall on 08/15/12 at 13:35:06

Thanks everyone.

Title: Re: Does a cooler exhaust improve performance?
Post by Oldfeller on 08/15/12 at 13:41:09

554057575C5F5D5C41465740320 wrote:

[quote author=4D7C787B766E75282A190 link=1345016875/15#18 date=1345038430]... to avoid melting their glossy satin polyester track suit pants while they are riding....

There's a mental image I'm not going to be able to get rid of any time soon.[/quote]

:D Those are a dull mat finished good looking polyester cotton blend nowadays, mind you. I am not "Leisure Suit Larry" and I am not sure you can even buy pure poly pants any more.

..... brief flashing visions of pure polyester spot welded to suffering red oozing skin from years past .....

::)

Title: Re: Does a cooler exhaust improve performance?
Post by rfw2003 on 08/15/12 at 13:53:18

Well I'm not sure how well it works on Single lung engines, but coatings that keep the exhaust heat inside the pipe rather then radiating into the air do provide some benefit. It keeps exhaust velocities up there by promoting better scavenging effect in the cylinder for removal of the burnt and unburnt gases in the previous power stroke.

Title: Re: Does a cooler exhaust improve performance?
Post by Blinky on 08/15/12 at 14:09:13

Quote:

I am not "Leisure Suit Larry" and I am not sure you can even buy pure poly pants any more.

Yes but some of us, well at least this one here, have a few left in the back of the closet. I knew what color socks went with a lime green suit and white shoes! 8-)

Not that I ever plan to ride in a Leisure Suit, but the pipe did take a bite out of my Fieldsheer armored mesh pants. I had to ask the Mrs. to sew in a leather patch.

Title: Re: Does a cooler exhaust improve performance?
Post by Savage_Rob on 08/15/12 at 14:12:11

My Firstgear overpants have a patch of different fabric in that part of the leg.

Title: Re: Does a cooler exhaust improve performance?
Post by clueless-FSO on 08/15/12 at 18:12:32

Just a thought. Seems a properly tuned engine, would run better, cooler, longer, than an improperly tuned engine. These bikes come running extremely lean, increasing the temp. Tune it right with any exhaust = cooler temps.

Title: Re: Does a cooler exhaust improve performance?
Post by TROX on 08/15/12 at 18:27:00

While on the topic of exhaust, I plan on wrapping my pipes and leaving the heat guard off. The plus side I never wear poly pants, always jeans and boots, but I shouldn't have a problem with that should I ? I try to be vigilant about not putting my foot against the exhaust anyhow.

Title: Re: Does a cooler exhaust improve performance?
Post by Savage_Rob on 08/16/12 at 14:34:56

575450090F0E050D3D0 wrote:

While that's true as far as it goes, the exhaust is still friggin' hot.

Title: Re: Does a cooler exhaust improve performance?
Post by Cavi Mike on 08/16/12 at 19:38:08

The engine runs hotter and even the exhaust gas runs hotter on a lean-tuned bike but on a rich-running bike the unburned fuel in the exhaust will continue to burn once it's expelled. This actually makes your exhaust piping hotter and THAT'S why the pipe turns blue. There is a fire going inside your exhaust.