Jet-Hot HFC/TP's?
 

Anybody have jet-hot do a coating on the HFC or TP's? I had them coat my headers and was pleased, but is it possible to do w/ HFC/TP? Would it even make a difference?

It would be pretty cool to do that to TP's.

It definitely would not hurt. It helps by keeping the gases hot while they pass through the pipe, which improves exhaust velocity.

I'm not 100% sure if you could do it to HFC's (but I doubt it), wouldn't the coating get all over the cat material?

I've considered the same thing, but the only concern I have is overheating the cat and potentially damaging the core. They should only coat the outside of the piece and mask the flanges anyway, so nothing should be coated on the inside.

Its really a question of how effective your coating is. Hotter exhaust gasses keep velocity up. Might not be too cost efficient if its only making a marginal difference. Are you boosted at all? Would help turbo spool if it really works.

Thx for the response guys. I'm not boosted. I also was thinking that it might not be a good idea to do the HFC for fear of damaging the core material if they spray inside and out. Hmm. I'll give Jet-Hot a call and see what they say, but I agree it would seem to be more effecting for those w/ TP's. But, I was very pleased w/ the work Jet-Hot did w/ my headers.

http://www.streetneeds.com/uploads/ecza/kinetix11.jpg
High-flow catalytic converters generally have a heat shield. The shield also dissipates heat. I see little point in jet coating.

https://s206.photobucket.com/albums/...1/helix101.jpg
On the other hand, I see no problem jet coating test pipes.

The heat shield is really to serve two purposes. First, it helps to trap heat inside the cat. They need to be heated to work efficiently. Second, a hot cat is the hottest part of the exhaust system second to headers so the heat shield helps to keep some of the heat away from the rest of the components under the car.

I did some more searching and it looks like a metal catalytic converter doesn't melt until about 2600-2800 deg F. You're not going to get your exhaust that hot. Ceramic core cats are washed and coated with the oxidizing agents during construction whereas a metal cat is made up of an alloy of the oxidizing materials. A metal cat is freer flowing and won't trap as much heat as a ceramic cat. Under extreme heat conditions, the ceramic cat will get brittle and break apart, the metallic will hold up better.

So I'd be willing to coat a metallic cat, but I wouldn't do it to a ceramic cat. Besides, not every aftermarket cat has an external heat shield.

For example, Crawford cats do have a heat shield.
http://www.crawfordz.com/pics/cat1.jpg

Fast Intentions cats are spun and do not.
http://www.fastintentions.com/exhaus...cats_built.jpg

^^^ like hellrado said, its not a bad idea if your HFCs have metal catalytic converters. Its a shame HELIX stopped making theirs... mine are still going strong after 30k!! I had mine coated at the same time JETHOT did my headers. I did it for safety reasons and to help hide them during any inspections. They basically cover the core with an insert during the coating process.
https://my350z.com/forum/intake-exhaust/116664-ts-headers-and-helix-hf-cats-pics.html

GL,
Zquicksilver

Well, whatever you do, make sure Jet Hot doesn't coat the INSIDE of the pipe or it will get all over the cat material, metallic or not.

JET-HOT has been in business long enough to realize the core should not be coated. :)


Zquicksilver

Decided not to send out my PE cats to jet-hot--I didn't want to wait. I'll post up pics in a few.

Assumptions like this are what gets you in trouble. I would generally agree with you, but I would also be very cautious and make 100% sure they know, because it's too late if they mess up

Once I get my headers back from Swain Tech I'm going to see how their White Lightning coating is and I will probably have it done to a set of FI 300 cell metallic cats once I have settled on an exhaust.

The fun part of doing bolt-on airflow mods last is trying to figure out what fits. :)