SiBlueEG6

went from shine to gold now blue on one runner YYYYY.

Top Ramen

And?

SiBlueEG6

just want to know if this is a good thing or not i mean the metal / material and stuff , so this is normal?

DESTROYER

Normal.

SiBlueEG6

thanks

-RedneckDave-

If it is changing colors differently than other cylinders, then you have a different EGT for that cylinder than the others.

91jdmhatchback

maybe, maybe not. It could just be the manifold design causing some restriction or something of the sort. It's hard to tell.

Top Ramen

Surface contaminants will also affect the colors, especially oils.

dave@passenger

Lol

91jdmhatchback

what you lol'ing about

SiBlueEG6

engine gas temp? is that with the tune?

dave@passenger

Really?

Think about what redneckdave said, than think about what you said. If I have to explain it I will but its not rocket science.

SiBlueEG6

i just sayin mybe its the tune maybe its the compression on that cycleder lower?? i hope not but what do u think?

SiBlueEG6

Can it being tuned on a log manifold then swapping to a ram will throw off the tune????

RC000E

Making any changes to the setup can necessitate a retune. Depending on the setup (porting, ring wear, valve sealing, etc) there could be variations in EGT from cyl to cyl and cause slight appearance variations in the runners.

I've built several manifolds that had a runner or two another color when I saw the customer at a later date. Looks funny, but they've been driving with them like that for 1-2 years no problems. I wouldn't say it's something to be extremely concerned about. If the plugs look normal, no detonation issues, car performs as it should, etc. then your fine.

BazMc EK4 S.i.R

Sounds pretty normal to me.

SiBlueEG6

ok thanks but it would be a good idea to get a retune just in case. thanks

GT35R_EF

This. For whatever reason, this happened on my ramhorn and we've scratched our heads and can't find any particular reason why it may be occuring. Car runs perfect, making good power, no detonation. I guess only time will tell .

S2Integra

Headers usually change color. Sometimes the change isn't as even a flow change of color as the rest. You should only worry if you notice cracking. It depends on each mandrel bend because after forging metal and then roll pressing it down to gauge the steel is very hard, at bending, the metal stretches causing changing desity at different points. The angle of bend, how long the bend is and density of metal at that point can cause slight color changes, even when coated. The more you heat it up, the more it stays blue. But again if there is no cracking then there really is nothing to worry about.

S2Integra

My only question is how different is the one runner, do you have pics? I'm curious to see what you mean.

downest

There was a pic but he removed it, basically one of the runners (#1 or #2, I forget) was very blued while the rest were gold.

nemesismachine

http://www.blue-job.com/

SiBlueEG6

here s the pic
^^^^^^ so are you telling me all it needs is a clean with that blue job stuff??



#1 and #4 are turning mostly 1 tho and the others are staying a real brass/real gold color.