hmmmmm, seems like some of the old racing Jags & Ferraris had a similar
setup with an independent Weber carb feeding each cylinder - don't know if
they actually had any sort of intake manifold........
now, if we can get the computer to vary the length of the venturi intake in
relation to engine rpm, we can take advantage of "ram" air effect (free
turbocharging!).......
-----Original Message-----
From: Shaun.Hendricks@bergenbrunswig.com
<Shaun.Hendricks@bergenbrunswig.com>
To: dakota-truck@buffnet.net <dakota-truck@buffnet.net>
Date: Friday, February 12, 1999 4:23 PM
Subject: DML: RE:DML Smooth air...
> Well, laminar air should flow smoothly around the valve (if you can
>maintain the laminar flow to the valve: a very tricky part) and once it
>reaches the chamber the concave/flat backside of the valve combined with
the
>location of the valve in the chamber (off center) would produce serious
>turbulence as the fuel is being injected into the chamber: exactly what you
>want. The fuel and air is mixed in that swirling mess, compressed and
ignited.
> Where the laminar flow really comes in handy is going around the
throttle
>plates in the throttle body. With properly designed plates, the air would
>essentially ignore their existance in a WOT condition, slipping past them
and
>using them as an accellerating venturi. In a lesser demand position you
>aren't asking for 100% from the engine anyway so any kind of air works
fine,
>though laminar flow would still go around the plates better than chaotic
air
>no matter what the plate rotation condition, probably resulting in an
increase
>in MPG.
> You don't need to redesign the valves or engine at all, just optimize
the
>whole setup to begin with. My personal preference would be to eliminate
the
>intake manifold altogether, design a custom venturi air valve for
controlling
>air flow to each cylinder, an O2 sensor at each exhaust output reporting
>combustion efficiency back to the computer and each cylinder being totally
>independent of the other, the intake venturi valve adjusting for each one
>optimally at whatever level the demand is.
> I can draw up the idea for the system, but it certainly wouldn't be
cheap
>to make...
>
>Shaun H.
>
>---original message---
>Not sure if I followed your entire post, but it seems you would want
laminar
>flow from the point of entry all the way to the valves. Yes, the valves
>will cause turbulence, but your main objective is to speed the flow of air
>from point of entry to the valve (assuming the intake is the bottleneck and
>not the valves). Only way we can fix the valve problem is either go to
>larger valves (but then you lose velocity) or re-design the engine (maybe
>with reed valves or rotary valves?).
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