well i git a stock exhaust from my parts car and i wanna throw some paint on it so it dont rust anymore i wanna paint from the manifold to the Y pipe i have this enggine paint good for 500 how hot does it get


Thanx in advance


Dustin

 

I can tell ya that the exhaust manifold-to-downpipe connection must hit over 500 at times, because it turns red RTV to dust, and that stuff is supposed to remain viable to 500*F...

 

lol...

try like 3-4 times hotter than that. Basicaly, nothing you can paint the manifold with won't burn off. I've gotten the stock manifold glowing bright ornage quite a few times during a drift and autox run, and thats with no cats, straight to a pretty open mufler.

Its nothign to see 1700*F on a rotary... by nothing, I mean common. I doub't you'll find any paint that can withstand that.

However:

If you just want to paint it to keep it from rusting, just use some high-temp brake paint. Yes... it will burn off in like an hour, but it will leave burnt paint residue that will keep the pipes protected from rust. Even the mufler I had painted high temp (1500*F) paint had blackened in about 3 months, and that was to the far back of the car.

Rotaries run hot EGTs, far far far hotter than postin engines due. Its because the combustion/exaust stroke is so close-- almost inside the exhaust ports/manifold.

 

Hey felix Wankel 88 umm Ive seen glowing exhaust on my S4 engine. You'd cook the paint off. Save the $$, and don't paint it.

 

My EGT gauge usually gets to around 1200 degrees after the car is fully warmed up. Sitting in traffic it can dip down to as low as 800 degrees.