Jet Hot coating on cats?
Thread Starter
Drifting
Joined: Sep 2005
Posts: 1,788
Likes: 2
From: Tallahassee FL
Jet Hot coating on cats?
Well I finally got my header system today, and only had time to just do a quick scan of the stuff in the top layer in the box. Looks like one of the header collectors got the rim of the pipe bunged in slightly. is this going to cause me some grief? 
But more importantly, even though I specified that I wanted the ENTIRE system Jet Hot coated, I noticed that the catalytic converters are NOT coated at all. It's too late to contact LGM, so I want to check in here to find out if this is just normal or did someone slip up on my order? In cases where the entire system is Jet Hot coated, SHOULD you expect to have the exterior of the cats coated as well?
I have spoken with one other person who got the LGM Pro system recently and he said his cats are not coated either.
Personally, I felt I wanted the coating to help keep the heat inside the exhaust system, but having the cats uncoated just seems to me to be defeating the whole purpose of the coating from the ends of the headers back to the attachment to the muffler pipes. So did someone screw up or did I just waste my money on having those additional pipes from the cats back coated?
But more importantly, even though I specified that I wanted the ENTIRE system Jet Hot coated, I noticed that the catalytic converters are NOT coated at all. It's too late to contact LGM, so I want to check in here to find out if this is just normal or did someone slip up on my order? In cases where the entire system is Jet Hot coated, SHOULD you expect to have the exterior of the cats coated as well?
I have spoken with one other person who got the LGM Pro system recently and he said his cats are not coated either.
Personally, I felt I wanted the coating to help keep the heat inside the exhaust system, but having the cats uncoated just seems to me to be defeating the whole purpose of the coating from the ends of the headers back to the attachment to the muffler pipes. So did someone screw up or did I just waste my money on having those additional pipes from the cats back coated?
Racer
Joined: Dec 2003
Posts: 448
Likes: 1
From: Naples Fl
cats?
Cats? arent they those furry little critters that catches them mices? 
Really unless you live where you have to deal with inspections and smog stuff. Leave em off and go with simms for the rear set of O2 ssensors or find a tuner to program them off. When I did my Kooks and x pipe mine myssteriouly disapeared. I used the simms. Never a code or a problem. It pops a little tho. Must be those mices
Really unless you live where you have to deal with inspections and smog stuff. Leave em off and go with simms for the rear set of O2 ssensors or find a tuner to program them off. When I did my Kooks and x pipe mine myssteriouly disapeared. I used the simms. Never a code or a problem. It pops a little tho. Must be those mices
Instructor
Joined: Mar 2004
Posts: 200
Likes: 0
From: Clovis CA
When I got my system from LG, I called the company who provided the "cats" and was told several times during a short conversation NOT TO COAT THE CATS. That it would cause the cats to burn out in very short order and would not be covered as a defect. 
I coated all the other parts to the exhaust system and I am extremely happy with LG's equipment. 
I coated all the other parts to the exhaust system and I am extremely happy with LG's equipment.
Le Mans Master
Joined: Aug 2005
Posts: 7,201
Likes: 0
From: DP(oh you know where) IL
St. Jude Donor '06
coating them on the inside would probably be very bad. But i think these guys are getting at coating the outside. Anybody know why you cant coat the out side of a cat. I would think it would help the cat by keepin the heat in
Thread Starter
Drifting
Joined: Sep 2005
Posts: 1,788
Likes: 2
From: Tallahassee FL
Originally Posted by JETZ
Well this is funny stuff. I too ordered my LG Pros Jet coated, along with the Random Tech cats at additional cost of course. They should be here end of the week, so we'll see!
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Safety Car
Joined: Jun 2004
Posts: 4,971
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From: Witness Protection Program Somewhere, USA
2026 Restomod of the Year Finalist
When I installed my Dynatechs I did not have the hi flow cats coated. The coating will clog the fine screen material in the cats and that's no good. The rest of the system is fine and looks terrific. Keeps heat down as well.
DO NOT COAT THE CATS.
DO NOT COAT THE CATS.
Thread Starter
Drifting
Joined: Sep 2005
Posts: 1,788
Likes: 2
From: Tallahassee FL
OK, I did some investigations and here's what I discovered.
First stop was with Jet Hot to ask them about coating the catalytic converters. The guy who replied to me says they quite frequently do when customers request that of them. He checked his records, since my system came from LG Motorsports, and says their account profile says they only coat the headers and rearward pipes for them, and NOT the catalytic converters. So apparently the catalytic converters were never sent to them to be coated.
Next stop was with Randon Technology to ask them about the possible negative aspects of coating the exterior of the cats with an insulating coating, and here's the response I got:
So, I guess that answers that. Apparently LG Motorsports did not have the cats coated because that would have voided the warranty on those devices. However, some people, on their own, can and do get them coated anyway.
The question I would have is when the cats fail, how do they do so? Does the material inside melt down and blow out, or does it melt down and cause a flow restriction? Or just a toss of the coin which way it will go?
Of course, I do have to wonder why that 3 inch hole in the back isn't a good enough "escape path" for the heat generated.
First stop was with Jet Hot to ask them about coating the catalytic converters. The guy who replied to me says they quite frequently do when customers request that of them. He checked his records, since my system came from LG Motorsports, and says their account profile says they only coat the headers and rearward pipes for them, and NOT the catalytic converters. So apparently the catalytic converters were never sent to them to be coated.
Next stop was with Randon Technology to ask them about the possible negative aspects of coating the exterior of the cats with an insulating coating, and here's the response I got:
Applying Jet Hot, or any other coating to the converters will void your warranty. Any type of insulating coating or material can cause a converter to overheat, which will lead to failure. The catalytic reaction that takes place inside a converter generates a considerable amount of heat and it has to have an "escape path".
The question I would have is when the cats fail, how do they do so? Does the material inside melt down and blow out, or does it melt down and cause a flow restriction? Or just a toss of the coin which way it will go?
Of course, I do have to wonder why that 3 inch hole in the back isn't a good enough "escape path" for the heat generated.
Team Owner
Joined: Jul 2004
Posts: 124,427
Likes: 288
From: .... NJ
Cruise-In VII Veteran
St. Jude Donor '05 thru '19
Jet-hot should have also told you that it is not a good idea if you were to coat the cats to use the shiny sterling sliver coating since the cats get very hot and the coating could come of and most likely would discolor. They would need to use their higher temperate coatings and it is a flat color.
Le Mans Master
Joined: Nov 2001
Posts: 8,080
Likes: 151
From: Toronto
Originally Posted by Likesvettes
When I installed my Dynatechs I did not have the hi flow cats coated. The coating will clog the fine screen material in the cats and that's no good. The rest of the system is fine and looks terrific. Keeps heat down as well.
DO NOT COAT THE CATS.
DO NOT COAT THE CATS.
Pro
Joined: Nov 2003
Posts: 532
Likes: 0
From: herminston oregon
coated cats
Originally Posted by Rich Z
Well I finally got my header system today, and only had time to just do a quick scan of the stuff in the top layer in the box. Looks like one of the header collectors got the rim of the pipe bunged in slightly. is this going to cause me some grief?
But more importantly, even though I specified that I wanted the ENTIRE system Jet Hot coated, I noticed that the catalytic converters are NOT coated at all. It's too late to contact LGM, so I want to check in here to find out if this is just normal or did someone slip up on my order? In cases where the entire system is Jet Hot coated, SHOULD you expect to have the exterior of the cats coated as well?
I have spoken with one other person who got the LGM Pro system recently and he said his cats are not coated either.
Personally, I felt I wanted the coating to help keep the heat inside the exhaust system, but having the cats uncoated just seems to me to be defeating the whole purpose of the coating from the ends of the headers back to the attachment to the muffler pipes. So did someone screw up or did I just waste my money on having those additional pipes from the cats back coated?
But more importantly, even though I specified that I wanted the ENTIRE system Jet Hot coated, I noticed that the catalytic converters are NOT coated at all. It's too late to contact LGM, so I want to check in here to find out if this is just normal or did someone slip up on my order? In cases where the entire system is Jet Hot coated, SHOULD you expect to have the exterior of the cats coated as well?
I have spoken with one other person who got the LGM Pro system recently and he said his cats are not coated either.
Personally, I felt I wanted the coating to help keep the heat inside the exhaust system, but having the cats uncoated just seems to me to be defeating the whole purpose of the coating from the ends of the headers back to the attachment to the muffler pipes. So did someone screw up or did I just waste my money on having those additional pipes from the cats back coated?
Le Mans Master
Joined: Nov 2001
Posts: 8,080
Likes: 151
From: Toronto
Originally Posted by myblackC5
no the cats don't come coated. but it is a good point. first you would only coat the outside only. second i wondered if coating the cats stop the code problem. i think the hi flow medal type cats don't get hot enought. they have to be 550 deg. the back part of the cat has to get 100 deg hotter that the front. plus having two right beside each other make the tunnel hot. coating headers really make a difference under the hood. i think coating outside of cats would help. there are companys that are offering systems coated all the way to the back of the car, they claim it works. i think i would coat the outside of the cats on mine if i change to headers. i would also coat the inside the heads and manifold if i got a chance! in fact as hot as the old lady gets i might have her coated also!!!
Le Mans Master
Joined: Feb 2006
Posts: 5,267
Likes: 40
From: Phoenix AZ
When cats overheat, Filibertos makes them into tacos
Really, they glob up and restrict the exhaust. I used to work for Mazda and we would see one of the three cats in RX-7s get so bad that you floor the gas in neutral and only hit 4000 rpm. Punch it out with a big screw driver and it would rev to the moon like normal.
Really, they glob up and restrict the exhaust. I used to work for Mazda and we would see one of the three cats in RX-7s get so bad that you floor the gas in neutral and only hit 4000 rpm. Punch it out with a big screw driver and it would rev to the moon like normal.
