Effectiveness of RAM induction?

[Bruce]

Part No. P4452791    (copyrighted 1990)
has a few of the basics, I was thinking one of the series had more math for
calculating things.  This book has some general guidlines, just 4 pages
long.
Bruce


----- Original Message -----
From: "Fran and Bud" <quest100 at gte.net>
To: <diy_efi at diy-efi.org>
Sent: Saturday, October 13, 2001 3:40 PM
Subject: Re: Effectiveness of RAM induction?


> Bruce,
> I would sure like to take a look at the info on design elements of a
> forward opening scoop.
>
> Do you have any info/title/number/etc. to better identify the "Mopar
book"?
> Is this something available at Mopar dealers?
> At book stores - "How to modify your Mopar for fun and profit".
>
> Bud
>
> ----------
> >From: "Bruce" <nacelp at bright.net>
> >To: <diy_efi at diy-efi.org>
> >Subject: Re: Effectiveness of RAM induction?
> >Date: Tue, Oct 12, 1999, 6:11 PM
> >
>
> >
> >they are able to manipulate the nder hood air flow alot more then the
> >average Joe, since they don't have to worry about snow, or heavy rain.
> >There is a Mopar book that shows the design elements of a forward opening
> >scoop which in MO is far different from ram air.
> >Bruce
> >
> >
> >----- Original Message -----
> >From: "Don Berry" <donbe at MICROSOFT.com>
> >To: <diy_efi at diy-efi.org>
> >Sent: Friday, October 12, 2001 2:46 PM
> >Subject: RE: Effectiveness of RAM induction?
> >
> >
> >> The Pro Stock drag races have done significant testing in this area -
> >> Warren Johnson in particular. Their conclusion was that the increased
> >> drag offset any gains in ram effect.
> >>
> >> -----Original Message-----
> >> From: Diehl, Jeffrey [mailto:jdiehl at sandia.gov]
> >> Sent: Friday, October 12, 2001 11:26 AM
> >> To: 'diy_efi at diy-efi.org'
> >> Subject: RE: Effectiveness of RAM induction?
> >>
> >> That seems fair.
> >>
> >> The car in question is an MR-2, which is a mid-engine rear drive,
Toyota
> >> 4
> >> cyl.  In factory trim, the engine is transverse mounted on the
> >> passenger's
> >> side and the TB is in the center.  From the TB, the intake makes 2 90
> >> degree
> >> accordion bends and enters a flapper-type Air Flow Meter.  From the
AFM,
> >> it
> >> has a 1 foot long tube that leads to the air filter box.  From the air
> >> filter box, there is a tube which traverses the width of the car back
to
> >> the
> >> passengers side, up the rear quarter panel to a vent in the side of the
> >> car
> >> behind the passenger's door.  All told, about 15 feet of intake tube.
> >> My
> >> car sucks air through a damned STRAW!
> >>
> >> On common intake mod for these cars calls for removing the 2 90 degree
> >> bends
> >> and mount the AFM to the TB and the air filter to the other side of the
> >> AFM.
> >> Now the air filter is inside the engine compartment and is sucking HOT
> >> air.
> >> Remember this car is mid engine and there is no real way to cool the
> >> engine
> >> compartment.  This modification is known to produce 5hp on an engine
> >> with
> >> only 112 before.
> >>
> >> Now here is what I'm planning to do...
> >> From the TB, I'll go through a hot-wire MAP.  I'll have to build a
> >> circuit
> >> to make the MAP look like the AFM for the ECU.  From the outside side
of
> >> the
> >> MAP, it's going to trumpet out to about 8"x6" and bend up toward the
top
> >> of
> >> the engine compartment.  This 8x6 intake box will come up through the
> >> engine
> >> hood, where the air filter will mount.  Then I'm going to have a duct,
> >> which
> >> is hinged over the rear window.  This duct will continue from the air
> >> filter, up and over the rear window.  I'm toying with the idea of
having
> >> the
> >> duct trumpet out yet some more to about 6" height and 36" wide, right
> >> above
> >> the passenger compartment.
> >>
> >> I think this system will remove most of the restriction present in the
> >> other
> >> systems.  It will get cold air.  Depending on the thermal qualities of
> >> the
> >> material used, (ceramic coated?) I should minimize the amount of
ambient
> >> engine compartment heat that gets transferred to the air.  I've also
> >> opened
> >> the system up quite a bit, instead of having to breath through a
> >> tube/straw.
> >>
> >> So, if I build this system, should I see any RAM effect.  I drive down
> >> the
> >> street at 30mph and stick my hand out the window and feel my hand
pushed
> >> back.  At the TB, the air is traveling at about 55mph @ wot.  But at
the
> >> end
> >> of the trumpet, the intake are is only traveling at a fraction of this
> >> speed.  I should see ram benefit at above this speed, right?
> >>
> >> Thanx for any input.
> >> Mike Diehl,
> >> '87 MR-2, 7age, Dual Pipes, hand-bent header.
> >> '96 4-Runner, Bone stock.
> >> '90 Corolla, Disguised as a Geo Prism!
> >>
> >>
> >> > -----Original Message-----
> >> > From: Bruce [mailto:nacelp at bright.net]
> >> > Sent: October 11, 1999 9:00 AM
> >> > To: diy_efi at diy-efi.org
> >> > Subject: Re: Effectiveness of RAM induction?
> >> >
> >> >
> >> >
> >> > So many different versions of what people call Ram Induction,
> >> > you'd have to
> >> > mention exactly what your talking about.
> >> > Bruce
> >> >
> >> >
> >> >
> >> > From: "Diehl, Jeffrey" <jdiehl at sandia.gov>
> >> > Subject: Effectiveness of RAM induction?
> >> > > How effective is ram induction?  I've heard claims as high
> >> > as 25%.  I've
> >> > > also heard people say that it's only effective at 150mph...
> >> > > Care to discuss it?
> >> >
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> >> >
> >> >
> >>
>
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