patSS/00

iTrader: (6)

Anyone know how hot the exhaust manifolds get? I need to know if it's OK to use aluminum to make block-off plates for the AIR holes in the manifolds. Aluminum melts at 1220 deg. F, can they get that hot?

ACCELR8

Well, since you have aluminum heads, I would think you'd be O.K.

LawmanSS

iTrader: (19)

I picked up a set of AIR blockoff plates from SJM---->

They're made of aluminum.

Navy David SS

iTrader: (13)

I got my set from Thunder Racing >>>>> don't forget to get new gaskets.

David

Ferocity02

iTrader: (60)

I made my own from stainless steel and they have worked well. Someone made some from super thin galvanized sheet metal and they worked. I drilled mine to 1/4", I thought that 3/16" was too small. Aluminum is fine.

EDIT: Oops, I was thinking restrictor plates... Aluminum is still fine for block off plates, sheet metal isn't.

patSS/00

iTrader: (6)

Heads have coolant flowing thru them. They don't make manifolds out of aluminum due to high temps (otherwise, think of the weight savings you could have).

Ferocity02

iTrader: (60)

Our manifolds are lighter than any aluminum manifold you could ever buy....

shawn's SS

iTrader: (5)

I made mine out of 1/4 inch aluminum and they worked just fine

ACCELR8

Good point, but I still think you'll be fine with aluminum block off plates.

foff667

iTrader: (2)

exhaust not intake manifolds.