[DeTomaso] ram air

[Dave Londry]

A very simple starting point for a non-boosted engine operating at low 
altitude is:
Atmospheric pressure = 15 psi
1 psi of boost = 6.6 % increase over atmospheric pressure.
For an ideal engine that would be the amount of extra charge loaded into 
the cylinders.
And so that would give a 6.6% power increase.
A real engine would never see that much increase because:
- induction losses increase
- exhaust losses increase
- and so on.

On 2021-07-29 5:11 a.m., JFFR wrote:
> I have tested my cold air induction system and have proven that 
> without the sealed air box connected to the side air scoops, my inlet 
> air temperature was 40 to 50 degrees warmer. The testing was very easy 
> to do on my car because it is fuel injected and I have an on dash 
> system monitor that has an inlet air temperature reading, along with a 
> lot of other information.
>
> Another member of this forum sent me a digital manometer and I tested 
> my system to determine how much actual ram air effect it had. The 
> readings were taken every ten miles per hour up to 120 miles per hour. 
> The data showed that there was a constant increase of air pressure in 
> the air box, however at 120 miles per hour it was less than one pound. 
> I don't know how much that small amount of increased pressure will 
> have on engine performance, so I will have to leave that up to the 
> experts, but my cold air inlet temperatures are absolutely accurate.
>
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-- 
Dave Londry
TRGuys.com

davel at trguys.com
Cell     604-721-2278
Skype    embeddedspaces