[Amc-list] Cold-air induction

[Rod <rodbrundage@xxxxxxx>]

Hi AMC fans,

Yesterday was pretty hot here in Northern VA.  My '71 Javelin AMX ran a 
constant
200 degrees on the way to our local cruise-in for most of the 45-minute 
ride, which was
fine with me since I run a 185 thermostat and didn't get stuck in any 
traffic except for
a few signal lights along the way.  But my query isn't about engine 
temps, it's about
generating more HP using cold-air induction. 

I stumbled on this article and was wondering what you Listers think 
about using
ram-air/cold-air induction (my Jav isn't Go-Pac equipped with the open 
cowl hood).

Any thoughts?  I've seen a few Ramblers setup with air ducts into sealed 
air cleaners
and am now considering doing the same, but on a quick look at my grille, 
it looks like
the air flow will have to be carefully considered as to the placement. 

(FYI, look for my Javelin in the September issue of Muscle Car 
Enthusiast Magazine,
where it made the "Reader's Rides" section.) 

Here's one link that got me thinking about cold-air induction (he's a 
Ford guy but
has some pretty funny stories on the "Work Days from Hades" link off his 
home page.

/http://home.alltel.net/bsprowl/CarbMythFact.html

Air temperature directly effects power.   Cool air is denser so a more 
air (oxygen) actually
enters the engine.   A 7.2 degree change in air temperature causes a 1% 
horsepower change.  
So if the air temperature under your hood is 180 degrees and the air 
temperature in front of
your hood is 90 degrees then by ducting the cooler air to your air 
cleaner inlet you can give
your engine a 90 degree incoming air temperature drop for a 12.5% 
increase in horsepower
(90/7.2 = 12.5)./
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