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 a 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
I'll get to the airport later today a take the measurements and get
back to you.
Thanks Paul, Bob Forbes
OK
Paul Lamar
Paul,
My intake is 11" long from the tip to the base of the throttle body.
The plate welded onto the manifold is 11" x 3 1/2" with 4" diameter
tubing at the the intake, tapering down to about a 3" diameter at the
far end. The plate and runners were heavily ported prior assembly (I
might dig up some old pix if that is important).
Scott Gettings
Might work as is. I would have to see the data to know for sure.
Most Helmholtz I have seen so far are not tapered.
Paul Lamar
There is a free windows SPECTRUM_ANALYZER from
http://www.hitsquad.com/smm/win95/SPECTRUM_ANALYZERS/
Bob, Drill a small hole in your intake plenum and insert a small
mic. Seal the wire in the hole with silicon rubber.
Send me a screen capture of the sound spectrum when running flat out.
Paul Lamar
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