I would agree with your findings on the ram air box since the air intkae
tubes are coming in right at the flat point of the truck where there is no
doubt air blasting around going down the roads. What I see in Ron's remarks
are what I have seen with setups that are built into the hood (with the
exception of Gary's scoop... ;-o) Most of these setups are too low and the
front of the truck pushes the fast air up higher than these really pick up.
Granted they still work fairly well but not enough to justify the expense of
the hood. The only hood I beilieve in the cowl hood due to the fact it helps
pull hot air out of the engine bay. My thoughts though.
Jeff Durling
'01 4x2 QC SLT+ 4.7
----- Original Message -----
From: "Bob Tom" <tigers@bserv.com>
To: <dakota-truck@dakota-truck.net>
Sent: Sunday, August 18, 2002 10:31 AM
Subject: Re: DML: Was New Guy, Now FIPK
>
> At 09:33 PM 8/17/02 -0700, you wrote:
> >-- snip -- As for ram air, that isn't going to be effective 'til
> >you're up beyond 120 mph.
>
> I would agree with you on this Ron in terms of air velocity
> within the intake system.
>
> But, in terms of increasing barometric pressure when
> moving, the ram air system does do this. I'm running
> the Air Inlet Systems' ram air box with dual 4" air ducts,
> each running up to left/right side of the rad with openings
> to the air at the grille. I also have the ducts wrapped in
> heat reflecting material.
>
> As an example, at the Mopar Nats the baro. pressure
> readout at a standstill was 29.4 (below sea level).
> Because the map sensor is within an enclosure the
> the actual baro. reading may or may not be .1 above
> this. At 23 mph, the reading went up to 29.6, at 37 mph
> it went to 30.7, and at 81 mph it went to 30.8 where it
> stayed until the end of the run. I believe the elevation
> of the track used by the Nats is 911'.
>
> Whether this has an effect on performance, I don't know
> as information in this area on how our pcms handle this
> is really sparse.
>
> Also, a couple of years ago, a DMLer did quite extensive
> temperature testings with various air cleaner setups
> (in the archives). Going by memory, I think his testings
> showed the temps. into the intake with the ram box was
> at or nearly at ambient temperatures. I don't believe
> his ducts had heat reflecting material.
>
> If anyone can add to my experiences, please do so.
>
> Bob
>
>
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