Date: Sat, 13 Apr 2013 09:54:12 -0700
Reply-To: Don Hanson <dhanson928@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Don Hanson <dhanson928@GMAIL.COM>
Subject: Re: Air scoops
In-Reply-To: <CAFF627C-69C1-42FB-8DFA-49519BEC7174@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
I have the intake air coming into my motor from a duct that is routed up
the D pillar on the right rear. I don't have dyno figures on this Vanagon
(inline gas motor) but when I was racing cars I had a 440hp V8 Porsche that
went to the dyno after each modification to quantify any progress we made.
When I fabricated a fresh air intake that mounted behind the grill but in
front of the radiator, rather than taking ambient engine compartment intake
air, it got us almost 15hp....not a big percentage, but significant.
All accepted wisdom says a colder intake air charge improves combustion
and increases power...My inline, therefor, got that heater ducting attached
to the air cleaner horn and routed up the D pillar to gather colder outside
air...Seems like it would be cleaner air, too, in dusty driving.
As far as scoops? One would have to take into consideration the added
aerodynamic drag they'd create. I don't think a watercooled vanagon needs
them....
On Sat, Apr 13, 2013 at 9:10 AM, Robert Stevens <mtbiker62@gmail.com> wrote:
> On Apr 13, 2013, at 9:32 AM, Rob <vwrobb@GMAIL.COM> wrote:
>
> At 4/13/2013 07:46 AM, Tim Whynot wrote:
> > I have these exact airscoops on my Westy. I made them from the HD cement
> > mixing trays. In my opinion these do work at getting more cooler air air
> > to the engine compartment. You can see the temp sensor drop qiuckly whne
> > getting on the highway and up to speed.
>
> You had over temp problems before you put the scoops on and they helped?
> (We're talking water temps right? You don't have an oil temp gauge
> for the engine?)
>
> Since I installed the Scan Gauge along with the first Subie conversion, I
> had
> no prior info about the temp of the intake air (Syncro, snorkel up L "D"
> Pillar)
> but since those installs (first: 2.2; 2nd: 3.0) I know now that the intake
> air temp
> at the sensor just above the throttle body, is a few degrees above the
> environmental
> ambient, which I'm SURE is quite a bit cooler all the time, than the air
> inside
> the engine bay. Although that (snorkel) has no bearing on engine coolant
> and
> oil temps, as far as I "know", it likely does have a bearing on engine
> performance
> due to the cooler intake air, and that in turn, may have a bearing on a
> cooler
> block?...i.e., coolant and oil temps.
>
> Shortly after buying this van ('02), I put a SETRAB oil cooler w/fan, in
> the R
> "D" pillar base, and noticed a 15 degree oil temp drop.
>
> Bob
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