Like
most things; it’s a tradeoff. Generally more cooling air flow equals
more drag. Somewhere in there one would hope there is an optimum; but
everyone’s criteria for trading configuration needs for drag reduction is
different. The attached chart shows radiator cooling drag as a function
of area (actually height for a given width, but same idea) for a fixed amount
of heat rejection. Larger area gives less drag, and
vice-versa.
Sorry,
best quality I could achieve scanning a scan, and keeping a manageable file
size.
Al
Al,
Interesting chart.
Not certain I am interpreting
it correctly, though. Not certain what the X axis is
related to is this the height you mention?
It
appears to show that the thicker radiators produce less drag overall than the
thinner radiator. Is this for equivalent core volume or core area? Its
my understanding that for the same cooling core volume the smaller surface
face core will produce the less drag, is this what that is showing or the
opposite? Sorry to be slow today, I'll blame it on leaning over my
Aerostars engine bay for 7 hours yesterday replacing a water pump - aches and
a restless nights sleep.{:>{
By the
way, I order some of those B9EQV spark plugs you mentioned to see if
they reduce the SAG interval compared to the stock plugs.
Ed
A.