heat painting inside new mac pipes

[mason79]

gents,

okay i'm goin to put oo my new macs, they really don't seem as cheap as yawl make them out to be, whatever...

i was wondering if anyone has actually painted the insides with high temp ceramic paint, to prevent bluing.

if this step does not help, i'll not waste my time and paint, but if it works a little i will go for it, please help and thanks in advance.

[Shappers]

Hi,

I would also be interested to know if this works. I have done this to my new pipes but as the rest of the bike is in pieces I don't know yet if it is going to do anything?

What I did is, I masked up one end of each pipe and then poured in some 800°C paint, I rotated it several times and shook it around and then poured out the excess. It seems to have coated the insides very evenly but I'm not sure it it helps!

BTW, I only did the header pipes, I think it is sufficient.

You have to degrease very well to get the paint to stick, I poured in some degreasant first and let it dry well.

Shappers.

[mason79]

i was reading that the pipes turn colors because of heat beyond 900 degrees, i have old 1300 degree paint i need to spray or puddle, will let you know and thats for the pour and shake tip.

[gerkenbruce]

The mac headers and muflers on ( The Black ) are black cremic coaded inside and out by hot jet . The muflers have to much back presser,

XSively
Bruce

[50gary]

I had my XS650 two into one pipes ceramic coated and they did both inside and out. I can put my bare hand on the outside at idle. Out toward the end, not at the head of course.
Cheers, 50gary

[mason79]

1300 heat paint in no blue outside

Originally posted by Shappers
Hi,

I would also be interested to know if this works. I have done this to my new pipes but as the rest of the bike is in pieces I don't know yet if it is going to do anything?

.

okay even though the bike runs like crap, help me on that guys see my other post...

i rode 30 miles and the pipes never turned color, so myth confirmed!

i'll give a longer term report next time...

[TopCatGr58]

Question about Stainless?

Along the same lines of this thread,

I'm hoping to fashion some headers out of stainless in the distant future for another bike I need to work on, and am wondering if they "might" turn blue also from the heat, like chrome?

This precoating the inside with the high temp paint sounds like a good preventative measure, it probably allows the heat to travel down the header and dissapate thru the muffler, along with shielding the header pipe walls from the intense temps coming directly from the head??
T.C.

[Shappers]

Thanks for the road report mason79, at least your paint is now 'baked' on well.

This is from memory so don't quote me!

But, I believe that the temperature at which the pipes start to turn blue is about 20°C above the normal operating temperature of the engine (I'm sorry I don't know what that is in F).

So your pipes should only turn blue if your bike gets excessively hot or your carbs are set up too lean.

I just didn't want to risk it with my new (read expensive) set of 4-2 pipes. It doesn't take long to do, call it 'insurance'..!

Would be nice if someone here knew the hard facts.

Brgds,

Shappers.

[mason79]

Originally posted by Shappers
Thanks for the road report mason79, at least your paint is now 'baked' on well.

This is from memory so don't quote me!

But, I believe that the temperature at which the pipes start to turn blue is about 20°C above the normal operating temperature of the engine (I'm sorry I don't know what that is in F).

So your pipes should only turn blue if your bike gets excessively hot or your carbs are set up too lean.

I just didn't want to risk it with my new (read expensive) set of 4-2 pipes. It doesn't take long to do, call it 'insurance'..!

Would be nice if someone here knew the hard facts.

Brgds,
Shappers.

you are the guinie pig, my bike is too rich now, maybe i'm dilussional, about keeping it chrome, maybe there is no such animal,

i had bbk shorty headers on a mark VII five oh, once and they stayed chrome....

[50gary]

Chrome will turn blue at 900F, typical exhaust temps at the exhaust port is 1250F hence to quote Iggy Pop, they'll all "Turn Blue"
Harley Davidson amoung other use double walled headers or chrome covers to heat shield the outer chrome and thus not "turn Blue"
Stainless steel will not turn blue to my knowledge.
Cheers, 50gary

[mason79]

okay i switch back to stock jetting 137.5 and 42.5 pilots and it runs like a bat outa hell, and the plugs look kinda warm still a litte reddish and tan not white so i think it's there.

this is about the pipes so with the extra 20 miles to a lovey slow redline more that 3 times, the pipes are starting to glow gold, not bad i like it, but will it get worse?

i have 44 miles on them and thats it..long term update to follow.

[mason79]

450 miles and still chrome

just wanted to let you know, i have some miles on the internally painted pipes with the engine in various states of tune,

right now the stock airbox is back in from the uni pods and i think i really like the muffled intake sound and a place for the vent tubing and the imaginary support for the carbs, and being able to wash the bike without bagging the pods, and no jetting changes live and learn.

i lost around 25% across the board, with the pods and mac 4 into 1's. with the plugs looking "good" i'm no good as a tuner.

with the airbox, i think i'm back to 95 percent plus, so it's here to stay.
so when they say the induction mods effect drivability more, i believe it.

okay the pipes have attained a golden hue, more pronouced closest to the head, and in some angles looks real chrome but golden nonetheless, so i don't know if a final verdict is appropriated but,

since theyare not blue, the way i have seen some pictures and

since they did not blue right away, like i hear some stories

i can say that painting the insides prior to installation, is a good way to preserve the "new look", it even looks like titanium pipes that has been exsposed.

[HobbyMan]

TC: I too want to make a stock replacement set of SS headers. I will have them chromed and ceramic coated on the inside. That would prevent the chrome from building and any rust from forming.

[planedick]

Chrome...

I had a '79 standard with chrome headers, though the chrome wasn't new they never turned blue. They were, and still are chrome without the blue. I believe that if your pipes turn blue your bike is running much too lean and will probably destroy something else soon.

[mason79]

stock pipes has a cosmetic external pipe, over the internal ,so they don't blue, i have a single tube header.