Emissions control equip removal... WAS: EGR Tube with a turbo

[mike kojima]

The thinwall header has a much higher rate of thermal
transmittance than the cast iron and a much higher
surface to volume ratio.  A stainless header is much
better for this.

Ever notice the werid tricks Honda manifolds have to
get around this?  Things like the tubular tri-y
manifold sharing a common wall on about 40% of the ID,
etc.

Mike
--- Wayne Cox <wmc_sr20@bellsouth.net> wrote:

> Why is that?  Doesn't the cast iron manifold have a
> larger heat capacity
> than a steel tube header?  Seems like the header
> would get up to temp more
> quickly, and spend less time soaking up exhaust
> heat.