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

 

And?

 

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

 

Normal.

 

thanks

 

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

 

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

 

Surface contaminants will also affect the colors, especially oils.

 

Lol

 

what you lol'ing about

 

engine gas temp? is that with the tune?

 

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.

 

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

 

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

 

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.

 

Sounds pretty normal to me.

 

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

 

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 .

 

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.

 

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

 

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.

 

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

 

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.