Heat Wrap

No Worries · 05-14-2012, 12:22 AM

My friend has a 650 V-Strom. The front cylinder's exhaust pipe is a 1/4 inch at the bottom from the oil cooler.

We decided to wrap the pipe with fiberglass heat wrap. We used gloves to avoid the glass fibers. We put the black fiberglass in water first and then wrapped. What a mess. We used pipe clamps to keep the ends of the wrap from unraveling.

The next day he took the bike out and the gauge registered hotter. We cut the fiberglass off after that. We're not sure why the bike didn't run cooler.

askmrjesus · 05-14-2012, 01:55 AM

Quote:

Originally Posted by No Worries

The next day he took the bike out and the gauge registered hotter. We cut the fiberglass off after that. We're not sure why the bike didn't run cooler.

Exhaust wrap is actually meant to increase the exhaust and header gas temps.

Since an engine is basically a big air pump, the faster you can move the air, the faster the engine goes, (up to a point).

The idea behind exhaust wrap, is to heat the exhaust so that the density of the exhaust decreases. The lower the density, the faster lower temp intake gases will flow towards it. It's like wind at the beach. The hotter the land mass, the faster the wind will blow cooler air on shore.

Problem is, the hotter exhaust gas, means a hotter pipe, which means a hotter head and cylinder, which means you've gone backwards in the cooling department.

JC

pauldun170 · 05-14-2012, 10:40 AM

Quote:

Originally Posted by askmrjesus

Exhaust wrap is actually meant to increase the exhaust and header gas temps.

Since an engine is basically a big air pump, the faster you can move the air, the faster the engine goes, (up to a point).

The idea behind exhaust wrap, is to heat the exhaust so that the density of the exhaust decreases. The lower the density, the faster lower temp intake gases will flow towards it. It's like wind at the beach. The hotter the land mass, the faster the wind will blow cooler air on shore.

Problem is, the hotter exhaust gas, means a hotter pipe, which means a hotter head and cylinder, which means you've gone backwards in the cooling department.

JC

...

askmrjesus · 05-14-2012, 02:16 PM

JC

No Worries · 05-15-2012, 01:40 AM

Quote:

Originally Posted by askmrjesus

Exhaust wrap is actually meant to increase the exhaust and header gas temps.

Since an engine is basically a big air pump, the faster you can move the air, the faster the engine goes, (up to a point).

The idea behind exhaust wrap, is to heat the exhaust so that the density of the exhaust decreases. The lower the density, the faster lower temp intake gases will flow towards it. It's like wind at the beach. The hotter the land mass, the faster the wind will blow cooler air on shore.

Problem is, the hotter exhaust gas, means a hotter pipe, which means a hotter head and cylinder, which means you've gone backwards in the cooling department.

JC

That sounds right. He just saw the temp gauge higher. I don't think he noticed if the bike was any faster.

askmrjesus · 05-15-2012, 09:30 AM

Quote:

Originally Posted by No Worries

That sounds right. He just saw the temp gauge higher. I don't think he noticed if the bike was any faster.

Any gains in performance would be modest at best.

JC

derf · 05-15-2012, 01:32 PM

Quote:

Originally Posted by askmrjesus

Any gains in performance would be modest at best.

JC

What crack are you smoking? That .05 hp gain from the wrap adds enough go to make rossi run for his money

Particle Man · 05-14-2012, 02:47 PM

Why are you trying to get it to run cooler?

Captain Morgan · 05-14-2012, 04:28 PM

Have you considered relocating the oil cooler? Many of the skid plates require relocation of the oil cooler to a vertical position at the side. I haven't done that to mine, but know it's a possibility. Touratech sells a relocation kit. Here's a link to the kit on their website. http://www.touratech-usa.com/Store/1...-V-Strom-DL650

Here's a pic of a modified oil cooler that's been relocated as I described.

No Worries · 05-15-2012, 01:34 AM

Quote:

Originally Posted by Particle Man

Why are you trying to get it to run cooler?

Just thought it was bad engineering to have the oil cooler right behind the exhaust pipe. Seems that the cooler was taking in more heat than it was expelling.

Quote:

Originally Posted by Captain Morgan

Have you considered relocating the oil cooler? Many of the skid plates require relocation of the oil cooler to a vertical position at the side. I haven't done that to mine, but know it's a possibility. Touratech sells a relocation kit. Here's a link to the kit on their website. http://www.touratech-usa.com/Store/1...-V-Strom-DL650

Here's a pic of a modified oil cooler that's been relocated as I described.

Thanks Captain, that looks cool.

05-14-2012, 12:22 AM	#1
No Worries Keyboard Racer Join Date: Feb 2008 Location: Mile High City Moto: Old Superbikes Posts: 1,016	Heat Wrap My friend has a 650 V-Strom. The front cylinder's exhaust pipe is a 1/4 inch at the bottom from the oil cooler. We decided to wrap the pipe with fiberglass heat wrap. We used gloves to avoid the glass fibers. We put the black fiberglass in water first and then wrapped. What a mess. We used pipe clamps to keep the ends of the wrap from unraveling. The next day he took the bike out and the gauge registered hotter. We cut the fiberglass off after that. We're not sure why the bike didn't run cooler.

05-14-2012, 02:16 PM	#4
askmrjesus Soul Man Join Date: Nov 2008 Location: Everywhere, all the time. Moto: '0000 Custom Turbo Cross (with jet kit). Posts: 6,481	JC __________________ The way things are going, they're gonna crucify me.

05-14-2012, 02:47 PM	#8
Particle Man Custom User Title Join Date: Nov 2008 Location: Central NY Moto: 2003 SV650S Posts: 14,959	Why are you trying to get it to run cooler? __________________ I'm not "fat." I'm "Enlarged to show texture." Handle every stressful situation like a DOG: If you can't eat it or hump it, pi$$ on it & walk away.

05-14-2012, 04:28 PM	#9
Captain Morgan Let's do another U-turn Join Date: Feb 2008 Location: Indiana Moto: 2009 V-Strom Posts: 3,816	Have you considered relocating the oil cooler? Many of the skid plates require relocation of the oil cooler to a vertical position at the side. I haven't done that to mine, but know it's a possibility. Touratech sells a relocation kit. Here's a link to the kit on their website. http://www.touratech-usa.com/Store/1...-V-Strom-DL650 Here's a pic of a modified oil cooler that's been relocated as I described. Last edited by Captain Morgan; 05-14-2012 at 04:38 PM..