Thread: What causes the blue flames on the exotic cars ?

So looking through the youtube vids i ran across vids of ferraris with the blue flames coming out the back. Now i know it aint NOS. So what causes it ?

Heres a vid..
YouTube - Ferrari F430 back fire

Thanks Guys

Unburned fuel hitting the atmosphere. Usually caused by someone running an aftermarket exhaust or some higher octane fuel or the car could be running rich.

Like he said unburnt fuel. The color comes from the electrons etc and is relative to the temp of the flame. Blue is hotter than red.

I've always had yellow/orange flames. I would like to see some blue.

Nick

i think that was a bit much for just unburnt fuel...i think its a flame thrower kit that you can install that sprays fuel into the exhaust system and ignites it with a sparker.
they are illegal

well its novitec'ed out so aftermarket exhaust and ecu for sure - didn't hear a supercharger whine? But I agree... thats a damn lotta flame.

Originally Posted by jersey

i think that was a bit much for just unburnt fuel...i think its a flame thrower kit that you can install that sprays fuel into the exhaust system and ignites it with a sparker.
they are illegal

agreed...usually flames from unburnt fuel are quick...not like that. thats almost like a jet fighter...no way thats unburnt fuel...thats definitely a flame kit. looks good...but i dont think its so good on the exhaust system.

Can't that happen if you're running straight pipes?

Looks like something from the movies.....

Its just Blue food coloring added to the gas!