This is my Honda odyssey 250 HP V6.
It appears to have several HR's.
One large one for each bank and auxiliary smaller ones to tune the
torque curve through out the rev range. It works very well.
There is probably is a lot of R&D associated with this design.
Paul Lamar
Here are some diagrams out of the shop manual.
If we can get this to work on the RX8 engine it will be a much more
compact tuned intake and will fit under the typical cowl. We might get
as much as 220 HP at 7500 RPM if we are lucky and one has a 3.12:1 gear box.
Those of you with cut off stock RX8 six port manuals let me know the
dimensions of the plate you welded on. So far Scott and Bob.
My best guess is 4 by 4 by 13 inches long with as 3 inch diameter intake
pipe and throttle body..
If the plate is wider than 4 inches something like
3 by 5 by 13 inches might work.
4.5 by 3.5 might also work.
A Maximite can measure the pressure as a function of RPM for fine
tuning. A 3/8" thick plywood box will work and can be cheaply changed if
the volume needs adjusting based on the Maximite data collection.
Paul Lamar
Paul,
My intake plenum measures 10" long, 4" wide at the base, 3" high at the
throttle body end, and 1 1/2" high on the opposite end. The intake
plenum was made from a piece of 4" thin wall aluminum tube cut in half
lengthwise. The reason I fabricated it at a taper is due to clearance
restrictions needed to clear the engine cowl (hood). Thoughts?
Bob Forbes
It could be resonating at the wrong RPM. Probably too low.
The idea is to have max pressure when the intake port is open.
That is synced to the CAS. (Crank Angle Sensor).
In other words the high pressure is in phase with the intake
port opening.
Try a 4 x 4 a little longer at 13 inches. Rectangular.
Here is a short program that measures the intake press starting at
CAS time. It generates a spread sheet file of pressure data. It stores
it on
a 64 GIG SD card. Any spread sheet program can plot it.
Open "PRESS.DAT" For OUTPUT As #1
SETPIN 1,6,50 'CAS INTERRUPT ROUTINE AT LINE 50
SETPIN 9, 1 "PRESURE DATA IN"
DONOTHING:
GoTo DONOTHING
50 Print #1 'NEW LINE
60 Print #1 Pin(5)
70 Print #1 "," 'COMMAN DELIMITED FILE
GoTo 60
End
BTW some USB keyboards don't work with the MM.
Get a Gear Head brand keyboard and USB to PS2 conn. keyboard adapter.
Paul Lamar
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