Miata Mailing List: June 1997, Message #243
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From: 	"john_k..." <kresky@erols.com>

Subject: Re: Air intake temp measurements.

Date: 	Tue, 3 Jun 1997 07:09:40 -0500







> 

> > All with an ambient temperature of a cool 14C (57F),

> > Now for the interesting results, with the temperature probe above and  



> > slightly forward of the radiator, ie. where the JR CAI gets its air   

> > from...  (I have a '90 so there is no blanking plate to block this   

> > airflow)

> > 

> > 			at 60 kmh  (37 mph)	at 100 kmh (62 mph)

> > 

> > Lights down		14.5 C	  (58 F)		16 C	  (61 F)

> > 

> > Lights up		15 C	  (59 F)		18 C	  (64 F)

> > 

> > 

> > Obviously, much lower temps all round, but ;

> > 2) the temperature rises with speed, where-as with the standard intake,

  

> > temp falls with speed

> > But #2 is counter-intuitive  (well at least to me).  Anyone got any   

> > ideas?  is it just the same effect as #1? or is something else going

on?

> 

> 	Hmmm, my guess would be that the temperature at this location

> would rise with vehicle speed as the air is brought to near stagnation

> from higher velocities.  





Good thought, Erik, but the difference between static and stagnation

temperature at 60 mph is a lot less than 3 degrees F. actually it is about

0.68 deg. F





John k...

> 

> 

>