<VV> Cylinder heads hot

[Frank DuVal]

Black is NOT required for the infrared thermometers.

A test was done for one of the auto A/C magazines and shiny surfaces 
made the most inaccurate readings. The best solution to get accurate 
readings?

Apply a piece of standard masking tape (that buff colored stuff) to the 
surface and focus on the tape.

I did my own test at work on an RF water load that had both chrome and 
polished aluminum surfaces, with red rubber hoses connecting the water 
flow. The shiny surfaces read WAY low. I used buff, blue and green 
masking tape on these surfaces and got readings that agreed with contact 
thermocouples. So, any color matte finish masking tape seems to work

Now, how to attach the masking tape to the Corvair head to get accurate 
readings.... 

But I think the matte finish of the head will do just fine. Aim for a 
grease spot!

Frank DuVal

Frank F Parker wrote:

>
>
>
> Good idea but most laser thermometers do not have adjustable 
> emmisitivity and thus the item being measured needs to be dark or 
> black for accurate
> reading. Paint a THIN coat of black paint on a small spot on ea area 
> you wish to measure if they are reflective aluminum. Errors can be 
> quite high.
>
>  
>