[DeTomaso] Rear Window

[Jeff Detrich]

On Tue, Mar 22, 2016 at 1:25 PM, Stephen <steve at snclocks.com> wrote:

>  The positive pressure under the rear of the car when it is moving at
>    speed, coupled with the likely vacuum behind the car reduces the
>    efficiency of the a/c condenser fan.  My tests suggest that around 60
>    mph the air-flow through the condenser is reduced by about 40%.  At
>    around 80 mph it is reduced by over 50%.  While I don't have a massive
>    amount of data, what I have suggests that the decrease in flow through
>    the condenser is not directly proportional to car speed, and that, in
>    the 90 to 100 mph range the flow through the a/c condenser drops to
>    around nothing.
>

Sounds like if you are going to be cruising at very high speeds, just
having a kill switch on the condenser fans would be helpful. That would be
easy to wire I would think.

Jeff
-------------- next part --------------
   On Tue, Mar 22, 2016 at 1:25 PM, Stephen <[1]steve at snclocks.com> wrote:

   A The positive pressure under the rear of the car when it is moving at
   A  A speed, coupled with the likely vacuum behind the car reduces the
   A  A efficiency of the a/c condenser fan.A  My tests suggest that
   around 60
   A  A mph the air-flow through the condenser is reduced by about 40%.A
   At
   A  A around 80 mph it is reduced by over 50%.A  While I don't have a
   massive
   A  A amount of data, what I have suggests that the decrease in flow
   through
   A  A the condenser is not directly proportional to car speed, and that,
   in
   A  A the 90 to 100 mph range the flow through the a/c condenser drops
   to
   A  A around nothing.

   Sounds like if you are going to be cruising at very high speeds, just
   having a kill switch on the condenser fans would be helpful. That would
   be easy to wire I would think.
   Jeff

References

   1. mailto:steve at snclocks.com