jeff p

Searched but could not find anything. Is their any benefit to heat treating the efini y pipe and cross over pipe . I have a down pipe and trust exhaust that I just had high heat treated with 2,000 degree grey ice coating (looks like powder coating). Before I install all the pieces, wanted advice on the efini y pipe. Would this benefit the turbos in anyway or is it just a cosmetic thing?

Thanks-
Jeff

dis1

Considering you want to remove heat from the air coming from the turbos (the purpose of the intercooler) adding a coating that acts as a thermal barrier on the Y-pipe is the exact opposite of what you would want to do. Typically down pipes and sometimes intake pipes (pre-turbo) are coated.

adam c

iTrader: (2)

I wouldn't do it. I don't really think it would help anything. If you were to coat the inside, some of it would undoubtedly come off, and go thru your intercooler (bad), fuel mixture (bad), engine (worse), and exhaust (not quite as bad).

Flybye

I coated mine about 4 years ago.


And I also coated my UIM



Unfortunetly, I didn't have any type of air temp sensor back then to test differances before and after the coating, but I CAN tell you this......The coating gives the inside almost like a polished effect. Just slapping on my coated UIM actually improved performance. Boost felt as if it raised faster. I've even had a few people notice my underhood temps were a little lower than theirs at times.

I couldn't even believe how much of a differance the Y-pipe made. Such a differance to the point that I had problems with boost spike, and back then I still had the stock ECU. Then along came the PFC

As far as flaking, I've had the UIM off 3 times since it has been coated, and the only slight flaking area has been around the bolt holes. The rest is as sturdy as the day I got it from Jet-Hot

jeff p

thanks for the replies and pics. still a little undecided. i want to make the right move since the part is out of the car and ready to be shipped. everyone thanks for the help
jeff

adam c

iTrader: (2)

Flybye,

Did you have the y-pipe in the car, and then remove it to have it coated. Or did you install it for the first time after it was coated? Did you coat the inside, or just the outside?

GoRacer

iTrader: (2)

Some of those reply's don't make any sense? I got the reaction when I wanted to do my turbo manifold. You want to contain the hot turbo air in the air pipe untill the intercooler cools it down and not contribute to baking the engine bay. The heat coating will not only prevent the pipe from getting hot but if it does it will cool off quicker. If the pipe does not get hot then it's not possible for it to have a thermous effect, in fact the opposite. It won't retain heat in the metal and cause the thermous effect. Without out it, if the inside air is hot it will heat the metal and the outside air will heat the metal.

I had mine heat coated, well just the air pipe (I was on a budget). I will do the rest later. I also heat coated the DP and exhaust manifold. I still intend on heat coating the turbo manifold. The cast iron uncoated acts as a thermous as it heats up it "stays" hot and takes a very long time to cool. For this reason it makes no sense to me that the blades will get even hotter, soaking more heat. The heat will exit the tail pipe. Containing the heat instead of spreading it inside the bay will prevent or at the very least extremely delay baking all the vacuum hoses and wiring harness.

Here's my air pipe done with 2k chermacrome and the Greddy elbow I did myself with off the shelf heat paint and then a layer of chrome paint. Oh yeah, both were polished beforehand.

Flybye

I bought it new then shipped it to Jet-Hot.

Coating only the outside or inside is not an option. Jet-Hot will automatically do both to completly cover the part.

Flybye

Exactly. Warming up the parts will basically allow them to act like a warm blanket keeping the incoming air nice and warm.

jeff p

good info.. this is what I was thinking but I am no expert. keep the info coming I am learning alot

GoRacer

iTrader: (2)

My heat coat sugestions:

Down Pipe - otherwise radiates heat even after shutdown
Exhaust manifold - otherwise radiates heat even after shutdown
Turbo exhaust manifold - if possible, else turbo heat shield (and other heat shields)
Intake manifold (LIM) because it's just above the exaust manifold and close to turbos.
Y-Pipe kit - Will otherwise radiate hot air before it's cooled by intercooler
Intake pipes - Especially with cold air intakes to prevent intake air from heating up
Cold Air Intake Box - If it's metal, keep it and incoming air cool

maxcooper

Don't forget that the heat rejected by the IC goes right into the engine bay anyway. I suggest coating anything that is cooler than the engine bay on the intake side, and everything on the exhaust side. Turbo compressor outlet temps are 250-300F or so on boost, which may be hotter than your y-pipe would otherwise be. But then again, it is right in the turbo zone, so perhaps coating it would have some thermal benefit.

-Max

dis1

Exactly my point. GoRacer's argument is a little off base. By the same logic you might as well coat the intercooler.

Anything after the turbos and before the intercooler should not be coated. If you want it to look nice put something on it that won't be a thermal barrier, maybe anodize it.
dis1

GoRacer

iTrader: (2)

^ I beleive Max proved my point! Oh, and ask him how many engine parts he just finished heat coating.
ok, let me word it differently: If you don't heat coat the turbo and exhaust manifolds then the intake pipes which are directly above them will heat up because of them. If they are heat coated then they won't. Same goes got the intake manifold (LIM). The reason to coat the y-pipe is because the air inside of it was heated from the exhaust and it will radiate outward to the rest of the bay. True, it's no where near is hot as the manifolds but it's still an improvement and hot air travels faster. If your intercool is rejecting air or heat soaking, then isn't it time for a bigger one?

dis1

Oh, I see what you are saying. Protect the Y-pipe from the heat radiating from the turbos. Perhaps... but I'd say if you want to do this coat the turbos instead. I think you would have to coat the insides though otherwise heat would be trapped in the turbos which might cause damage. I'm no expert on the proper method of coating turbos though.

I do see your point now though and retract my statement about you being off base

maxcooper

With a single turbo, it is pretty clear that you should not coat the pipes between the turbo and the IC. You want them to shed heat into the engine bay to cool the intake charge down. It doesn't matter that the heat goes into the engine bay because the heat from the IC also goes into the engine bay.

But it is less clear with the y-pipe and the stock turbos. Is the y-pipe normally less than 250F (especially with your turbo stuff coated)? If it is, it might be best to leave it uncoated so that it will shed heat into the engine bay and cool the intake charge.

Realistically, there probably isn't much difference in temps between the air inside the y-pipe (under boost) and the environment outside the y-pipe. So coating it probably doesn't help or hurt much.

-Max

adam c

iTrader: (2)

Even if the coating reduced the y-pipe a couple of degrees, it doesn't make a significant difference. The air will go thru it so quickly, that a 2-3 degree difference will do virtually nothing.