Underhood Heat

U

UP_CARP

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Nov 26, 2007

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• Nov 26, 2014

• #1

I've seen a ton of info on vents, fans, etc to get heat out from under the hood. Has anyone ever tried to keep the heat level down by wrapping the pipe/can with exhaust insulation?

Done in cars all the time using something like this:

http://www.summitracing.com/parts/d...pUHqONZVNdE-JPQMP48LeohrqdZ-btmG6caAuZz8P8HAQ

 

Pro-8250

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• Nov 26, 2014

• #2

I don't know of anyone that does this. Sorry:noidea:.

 

gmustangt

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• Nov 26, 2014

• #3

I do it on my machines, heat is power without it your going no where.

Keeping the hot stuff hot is important, keeping the heat in is better than trying make the hot stuff cold to stop the heat.

It's not the end all be all.

Use 1" wrap on your sled , 2" dosent work well with the bends. Get the wrap moist ( you don't need to submerge it in water) , wrap , dry , then spray with silicone spray.

 

P

pulltype_polaris

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• Nov 26, 2014

• #4

Never had experience with wrapping exhaust but I know that the main culprit on my 12 switchback was the stock can put off so much heat it melted hood and side panel. Put aftermarket on and stayed way cooler.

 

S

sledneck_03

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• Nov 26, 2014

• #5

gmustangt said:

I do it on my machines, heat is power without it your going no where.

Keeping the hot stuff hot is important, keeping the heat in is better than trying make the hot stuff cold to stop the heat.

It's not the end all be all.

Use 1" wrap on your sled , 2" dosent work well with the bends. Get the wrap moist ( you don't need to submerge it in water) , wrap , dry , then spray with silicone spray.

Click to expand...

Ive see 4 stroke guys drop roll in a pail of water and pull out an end and wrap it way... How do you moisten it your way?


#canadastrong

 

gmustangt

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• Nov 26, 2014

• #6

sledneck_03 said:

Ive see 4 stroke guys drop roll in a pail of water and pull out an end and wrap it way... How do you moisten it your way?


#canadastrong

Click to expand...

dei's instructions https://m.youtube.com/watch?v=WP3o1snEF2Q

Just get it damp under a tap.

 

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turbormk

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• Nov 26, 2014

• #7

Are you removing the clamshell from the pipe then wrapping it or just going over top ?

 

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LoudHandle

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• Nov 26, 2014

• #8

The wrap is fairly common, especially with the turbo crowd.

You can retain too much heat in the pipe, but most important is retaining a fairly consistent temperature. As temperature directly relates to pressure and pressure has a huge effect on fueling. Thus consistent pipe temp equals consistent fueling which translates to consistent power / performance.
Something we can all get behind and understand the benefits of.

 

G

geo

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• Nov 27, 2014

• #9

Actually consistent temp, means consistent speed of sound, means consistent peak rpm because the pipe is tuned to reflect these waves.
You can pick high temp or low temp to tune to depending on your riding style. Dang trees get in my way so I tune for low temps and "un insulate" my pipe lol.

As for getting rid of underhood heat. over the headlights and under the windshield area gives you a spot with almost a square foot to open up. It's a "convectionally" excellent spot because heat rises. Downsize the headlight assy while your in there to something like car running lights and you make more room with the added "venting in" frontal area.
MO.
Also don't close off the big hole in the belly pan. Again MO.

 

T

turbormk

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• Nov 29, 2014

• #10

gmustangt said:

I do it on my machines, heat is power without it your going no where.

Keeping the hot stuff hot is important, keeping the heat in is better than trying make the hot stuff cold to stop the heat.

It's not the end all be all.

Use 1" wrap on your sled , 2" dosent work well with the bends. Get the wrap moist ( you don't need to submerge it in water) , wrap , dry , then spray with silicone spray.

Click to expand...

Are you removing the clamshell on the stock pipe or are you just wrapping aftermarket pipes ?

 

gmustangt

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• Nov 29, 2014

• #11

turbormk said:

Are you removing the clamshell on the stock pipe or are you just wrapping aftermarket pipes ?

Click to expand...

Mine was wrapped with the stock shell removed.

 

Pro-8250

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• Nov 29, 2014

• #12

Why don't the sleds come stock that way then? Not saying it's wrong or right, just asking.:face-icon-small-hap

 

S

SRXSRULE

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• Nov 29, 2014

• #13

Pro-8250 said:

Why don't the sleds come stock that way then? Not saying it's wrong or right, just asking.:face-icon-small-hap

Click to expand...

One of the downsides is that it can rust out your pipe. The wrap is always getting wet with snow and it holds that water in the wrap and causes the pipe to rust under the wrap.

Thats why the one post mentions spraying with silicone to try and repel the water. Eric

 

gmustangt

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• Nov 29, 2014

• #14

As mentioned moisture , also time .. It's messy and time consuming to wrap , no way efficient or cost effective for the oem. Easy for the oem to use the insulation and shell.