Sorry Don:
One atmosphere = 32 feet of water = 14 psi
=> 4" = 1/96*14 = 0.15 psi
Mark Hooper
-----Original Message-----
From: Don Malling [mailto:dmallin@attglobal.net]
Sent: Wednesday, February 19, 2003 7:42 AM
To: Richard Good
Cc: Richard Seaton; 6-Pack
Subject: Re: Air filter location for the fresh air intake.
Hi Richard,
Help me with this.
I think the turbo boost gauge on my 89 Probe (It was free), goes from 0
to 12 (inches of water column pressure?? PSI?? The same??). I rarely
boost it over 6...
If 3-4 inches is the same as my Probe's 0-12 boost gauge scale, 3-4 is a
very respectable amount of boost. Maybe I should replace my wimpy planar
TR250 stock hardboard radiator wings with your closed TR6 style radiator
shroud?
Don Malling
Richard Good wrote:
>
> The area behind the grille is a high pressure area when the car is moving.
> Connecting the intake to this area will take advantage of both the
pressure and the
> lower temperature of the air. We are not talking about alot of pressure
but a little
> pressure sure beats a vacuum. It has been alot of years since I did the
testing but
> if I remember correctly with my ram air system with the filter out front
and a 3.5"
> hose, I measured 3 or 4 inches of water column pressure at the rear of the
air box
> at 60 mph at full throttle at 5000+ rpm.
>
> Since the entire area behind the grille is pressurized I would not expect
much
> advantage from a funnel turned forward. The location of the filter, front
or back,
> should not make a difference either. What will make a difference is the
amount of
> restriction created by the size of the filter and diameter of the hose.
Hoses
> connected to the two little fittings on the front of the early filter
housing will
> be way too small to move enough air for a high performance engine.
>
> About blocking the radiator and overheating? Unless you have something
flat in front
> of the radiator it will not be a problem. That pressurized air will flow
right
> around the filter and through the core.
>
> Richard Good
>
> Don Malling wrote:
>
> > Hi Richard,
> >
> > I have often wondered about this.
> >
> > I thought the objective of connecting the carb air supply to the
> > radiator cowl was to create a ram induction affect -- turbo sort of.
> >
> > If that is true, wouldn't it increase the ram affect to keep the air
> > filter back at the carbs rather than out front at the radiator cowl? It
> > would seem that air filter out front would decrease the ram affect. It
> > would seem that even at the radiator cowl, you would want to mount some
> > kind of funnel shape.
> >
> > Always wondered but was afraid to ask...
> >
> > Don Malling
> >
> > Richard Seaton wrote:
> > >
> > > 6 Pack,
> > >
> > > While considering relocating the air filter up past the radiator
shroud, I
> > > got to considering rain will pass the grille and soak the filter.
> > >
> > > Hopefully this will be few and far between. What have others done
when
> > > relocating the filter to this location and is it unnecessary to worry
about it
> > > getting wet?
> > > The filter getting water logged isn't good, right.(?) Should I
fabricate a
> > > shield for the front of it, and what about the shield limiting
airflow? Just a
> > > note,Richard Good's has a shield.
> > >
> > > Maybe I should think about something else, but it's too cold to work
on the
> > > car.
> > >
> > > Richard Seaton
> > > RSH17@msn.com
> > > View My restoration @ (http://groups.msn.com/Richards69TR6Restoration)
|