Wrapping headers?

[MyGreen6]

Anyone wrapped their headers? I've decided to do it and I'm curious if they had any issues or if theres a difference in tones.
Thermo-Tec: Exhaust Insulating Wrap (Graphite Black)

[mushkid]

they keep engine temps down i would recommend to do it just be sure you use hi-temp silicon spray after

[MyGreen6]

Hi-temp silicon spray after? Spray it down? I just noticed the write up but this is the first I've heard of silicon spray.

[mushkid]

eBay Motors: DEI HT Silicone Coating Black Exhaust Header Wrap Spray (item 370048445494 end time May-09-08 17:53:24 PDT)

[Scatman95]

eBay Motors: DEI 010110 EXHAUST HEADER WRAP KIT W BLACK HT SILICONE (item 300215156414 end time May-10-08 08:28:19 PDT)

this kit includes everything you'll need. Its the kit i bought, and you'll have a lot left over bcuz i see that u have a first gen.

[MyGreen6]

Much thanks for the links and info, I'm actually putting it on a 93 Probe now.
I started off buying a couple rolls of 1" to wrap some OBX headers but it didn't go far at all, I'll be picking this kit up for sure.

[dabckid]

I just did mine myself. Make sure you use 2" wrap and use lots of hot water.
Starting it up for the first time, my neighbor thaught I had an engine fire. LOL


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[MyGreen6]

Originally Posted by dabckid

I just did mine myself. Make sure you use 2" wrap and use lots of hot water.
Starting it up for the first time, my neighbor thaught I had an engine fire. LOL


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HAHA, well that's reassuring!

[darkmushroom]

let me know if it turns out for the better if its worth the money ill be sure to do it.

[BTPilot]

whats the hot water for?

[dabckid]

Originally Posted by BTPilot

whats the hot water for?

Helps the wrap stretch a bit. When it dries out it goes very tight.
if you don't use water it isn't anywhere near as good.

Also works great on the CAI.

What a difference to. Notice the difference every time I open the hood.

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[BTPilot]

so wha i do then? soak in hot water for 5-10 mins then start wrappin it and let it dry? y hot water...do i spray it after its dry or wha? respect..

[dabckid]

Warm hot what ever you like. Let it dry for a day in the sun then spray.
Make sure you do 3 or 4 light coats, rather than heavy coats.

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[briansb]

Originally Posted by dabckid

Also works great on the CAI.

Unfortunately, the gain here is MINIMAL at best on an intake. It's the INLET temperature that matters. The air charge is simply moving too fast for any significant heat from the intake plumbing to be transfered.

The following is an explanation I posted on an LS2 forum:

The heat in the intake is governed by the following equation:

q = h*A*dT

where
q = heat flux per unit time
A = heat transfer area of the surface
h = convective heat transfer coefficient of the process
dT = temperature difference between the surface and the bulk fluid

h is dependent upon fluid viscosity, VELOCITY and and other properties. I can't find my thermodynamics or heat transfer books at the moment (all packed) so I don't have the exact numbers, but air can vary from 10 - 100 W/m^2*K.

Insulating the intake box/filter and ensuring it is seeing cold air and relocating the IAT sensor will yield the most results. I had a major problem with a DSM I own and had great results with that method.

Calculations for I idle in an LS2 (worst case scenario since air is the slowest) showed an increase of a fraction of a degree. Bottom line - lower the INLET temp.

(As a note- relocation on the LS2 is a major factor because the MAF housing becomes EXTREMELY heat soaked and cause false readings and increasing the time for the IAT sensor to reach steady state with the intake air charge. This is simply done to ensure the car is running the correct timing table for the actual intake air temp.)

[Heis-Strokanoff]

holy canobe! Chemistry major in here? So wrapping the headers lowers the under hood temps, but is there an actual gain? i like my shiney headers