In the article jon is refering too I believe they stated that at 300 mph it
was 2psi not 1/4 psi...
Chris
----- Original Message -----
From: GS- <GSWillhite@ualr.edu>
To: <dakota-truck@buffnet.net>
Sent: Monday, August 30, 1999 10:09 AM
Subject: DML: Re: Shaker Hood, CFM Comparisons, Questions..Sorry Long
> Many thanks to all the DML'ers who posted a response
> to these questions on the efficiency of this shaker hood.
>
> Jon's post on the this subject was very logical and helped
> put the ram air effect into perspective. Why not take published
> test proven results (the Hemi's scoop at 300mph=1/4psi) and break
> them down into given vehicle speed and PSI/HP relationships. Granted
> there are more variables involved but this at least gives us an idea of
> what HP numbers we can expect to generate at Dakota speeds.
>
> If 1 psi= 11.6 horsepower, then ram air at 60mph the PSI/hp is only
> .05/.523! Sorry thats not enough to bother or waste $$ on. You also
> have to worry about the element SIZE/CFM rating 14x2.5/662.7 .
>
> This also proves Patrick right:
> >
> > -If your looking for my opinion, I think that any shaker hood is
> > cosmetic, not a performance increasing modification. My belief is the
> > original intent when these hoods were put on the older Barracuda's and
> > Mach1's was to have the power of the engine show by a vibrating scoop
> > visible to anyone looking at the hood. These cars basically had a race
> > engine installed in them with a very racy, rough idling camshaft, and
> > the shaker hood showcased the power.
>
> So Whats the hot CFM ram air hood were looking for? With this info it
> looks like an Eric class ram air hood with large element or some type of
> pressurized 8-9"cone rated at 833+ CFM. On the other hand Patrick
> already
> said if you have the engine power the shaker is a nice way to show it
> off.
> Hehe...I don't have that much power, but I still like the shaker.
>
> GS -
>
> 98 5.2L 5spd
>
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