What about Jet Hot on OEM Muffler

[AZGT]

Just started thinking about this. Aside from sound (which I actually find OK), a lot of discussion about the OEM muffler is heat.

Wondering what would happen if the muffler was Jet Hot coated? The stuff I saw in a magazine (and their site) indicates signficant under hood and exhaust pipe (header) temperature drops. Would this work for the OEM muffler and exhaust pipes?

Thoughts?

Anyone with Jet Hot experience?

 

[Empty Pockets]

Just started thinking about this. Aside from sound (which I actually find OK), a lot of discussion about the OEM muffler is heat.

Wondering what would happen if the muffler was Jet Hot coated? The stuff I saw in a magazine (and their site) indicates signficant under hood and exhaust pipe (header) temperature drops. Would this work for the OEM muffler and exhaust pipes?

Thoughts?

Why not just fit a "sheet" of heat shield material over it? That's what I have on my list of "to do's" for this week.

 

[BlackICE]

Just started thinking about this. Aside from sound (which I actually find OK), a lot of discussion about the OEM muffler is heat.

Wondering what would happen if the muffler was Jet Hot coated? The stuff I saw in a magazine (and their site) indicates signficant under hood and exhaust pipe (header) temperature drops. Would this work for the OEM muffler and exhaust pipes?

Thoughts?

Anyone with Jet Hot experience?

Why not just wrap it with some heat insulating material like the stuff already used around the engine compartment? Cheaper, more effective. But that still doesn't solve the problem of the stock exhaust blocking air flow out the back and weighting 56 lbs vs. less than 10 lbs for a cat back system.

 

[AZGT]

Why not just wrap it with some heat insulating material like the stuff already used around the engine compartment? Cheaper, more effective. But that still doesn't solve the problem of the stock exhaust blocking air flow out the back and weighting 56 lbs vs. less than 10 lbs for a cat back system.

True - but taking out 46 pounds for a couple of thousand dollars is a little expensive for small weight drop. Diet would be cheaper and healthier :biggrin

I had forgotten about the air flow issue, but if the temperatures are lowered, air flow is not an issue. None of us have had a heating problem in the winter - temp sticks right at the 180 mark (of whatever that mark is - forgot). So it still seems to remain a unit heat retention / radiation issue.

I had also thought about putting something over the muffler between it and the vents - just haven't gotten there yet. The idea of wrapping is also interesting. :thumbsup Wonder if anyone has done that yet. That would seem to be worth trying.

 

[analogdesigner]

Muffler insulation

The stock GT muffler already has a thin ceramic insulating cloth wrapped around it with a stainless steel sheet metal cover wrapped and welded over that. There is no insulation attempt on the bottom of the muffler. As other's mentioned, it is very heavy and constricts fresh air from flowing as easily into the engine compartment when car is stopped or moving very slowly. Jay

 

[BlackICE]

True - but taking out 46 pounds for a couple of thousand dollars is a little expensive for small weight drop. Diet would be cheaper and healthier

I think it would cost me more to try to lose 46 lbs. Buying the exhaust is CHEAPER for my heath and budget. Also note that the exhaust weight is in a very bad location, high and to the very most rear. Handling will improve more losing the exhaust weight, rather than the comparable amount in the passenger compartment.

 

[barondw]

The stock muffler actually weighs 62 pounds. So the potential weight savings by changing is over 50 pounds.

Think about wrapping the cats.

Dave

 

[snaproll]

The stock muffler actually weighs 62 pounds. So the potential weight savings by changing is over 50 pounds.

Think about wrapping the cats.

Dave

Those things are H O T - have you done it? If so, what material works?

Bruce

 

[Empty Pockets]

Think about wrapping the cats.

Dave

Uuuuuuuuuuuuuuh, I think I'd "pass" on doing that. That idea scares me.:eek

 

[Fyr-FtrGT]

I fell in love with my GT all over again after I installed the Acufab exhaust. With the windows down, the stereo off, and driving through a canyon, you will understand what I mean.

 

[barondw]

Those things are H O T - have you done it? If so, what material works?

Bruce

Sure they are hot, Yes it works, Yes I have done it. Yes it is very common.

Dave

 

[barondw]

Uuuuuuuuuuuuuuh, I think I'd "pass" on doing that. That idea scares me.:eek

Nothing to be scared about, just something new to learn about. Wrap the headers and cats to also reduce underhood temps. SOP for many years. Google exhaust wrap and look at all the products. Here is a link, no endorsement, it was the first to appear when googled:

http://www.exhaustwrapshop.com/default.aspx?basketId=0

Stuff really works, many race cars use this technology regularly.

Dave

 

[Empty Pockets]

Nothing to be scared about, just something new to learn about. Wrap the headers and cats to also reduce underhood temps. SOP for many years. Google exhaust wrap and look at all the products. Here is a link, no endorsement, it was the first to appear when googled:

http://www.exhaustwrapshop.com/default.aspx?basketId=0

Stuff really works, many race cars use this technology regularly.

Dave

Oh, I know about what it does & how, etc. I've used the stuff. I just don't like the idea of wrapping the cats. They are designed to work within a certain temp range if I remember correctly ...and wrapping 'em will screw all that up. And may melt 'em!:rofl (joke)

Just as an aside: Wrapping headers with this stuff will "bake" the carbon outta the tubes to the point the metal will weaken, PIT, and actually flake off the headers! I'VE SEEN MY OWN HEADERS DO THIS!!! It's no joke.

God only knows what it'll do to cats. I wouldn't wanna find out. THEY BE PRICEY!:lol

 

[barondw]

I guess in very extreme conditions that could happen to the cats, but I don't think its likely. If something happens I will use one of my spare two sets, no big deal.

Keep in mind that the original muffler and depending on the after market system block the vent, as Jay mentioned, and thus heat soak becomes a real issue. What are the temps of the cats and pipes with heat soak??? Is it within the "designed range"...I doubt it.

After all that is why Ford assisted Bob Ida in developing an alternate exhaust system to get the heat out of the engine compartment. He didn't design a performance exhaust on purpose, he designed an exhaust to get the heat out, eliminate the horsepower drop due to heat soak (up to 60 RWHP), and as a by-product created a better sound. It also prevents the vents on the clamshell from warping and stop heat related cracks in the air box. This seems to have escaped some of the manufacturers of other after market exhaust systems that I have seen. Its not just about the sound.

As to coolant temp the dashboard gauge is not the most accurate and when it senses coolant temp reaching between 180-200 there is a built in delay. Thus it is running hotter than indicated, until it jumps to the correct temp. I am not exactly sure of delay timing.

Very important to measure coolant temp, dyno or driving, from the ECM and not relying on dash gauge. This way you can monitor the heat soak impact. Some devices also allow logging so you can check it later and don't have to constantly watch the readout.

Dave

 

[B O N Y]

Dave is right on the money, as usual. Heat wrap as much of the system as possible, you will be rewarded with more HP!

 

[Sinovac]

If you like the sound of the stock system, you will like the Borla (Ford Racing) muffler. Not too loud but much better sound. It is smaller than the stock muffler and thus blocks less airflow. However, it certainly blocks more air than the Ida/Heffner/etc pipes.

 

[barondw]

Also the GT exhaust is made from titanium with a melting point og 1795 C +/- or 3293 F +/-.

Stainless, depending upon grade has a melting point of 1400 C +/- or 2600 F +/-.

IMO just don't believe that the wrap will cause the titanium to melt.

Dave