Well David you have outdone your self this time. Not only is the poly quad
design brilliant, the article releasing the cutting edge design is equally
impressive, I’m in awe.
Some of the information I expected to see in the “In Cylinder Turbulence and
Combustion Dynamics” series shows up here. Early on I didn’t understand
why there was no mention of swirl and tumble in the series, now I understand.
Quote:
Originally Posted by DavidVizard-GFN
... The key to making low speed torque is how much charge is trapped at
valve closure and how effectively the charge is burned. Just how effectively
a charge burns is down to mixture preparation and in cylinder motion at the
time of ignition. Assuming that mixture preparation is good then, at this
point, best results would be achieved by the cylinder with the best
combustion dynamics stemming from appropriate in cylinder charge motion....
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Quote:
Originally Posted by DavidVizard-GFN
The original tests with the Polyquaded Arao small block Chevy heads
established, within reasonable parameters, that it was possible to achieve
two valve head low speed torque without significantly sacrificing top end
output. Along with this our re-furbished emission gear showed a reduction
in all raw emissions. Most advantageous was the reduction in NOX. This was
ascribed to the reduced amount of timing the PolyQuad heads needed to get
the job done. At the 60 hp @ 2000 rpm cruise test (all these tests were
done with a 16/1 air/fuel ratio) the timing required dropped from 34 degrees
to 24 although it could be reduced from here to as little as 20 before any
real drop in output/fuel efficiency was seen.
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Quote:
Originally Posted by DavidVizard-GFN
After dyno testing in the Orlando area (where he lived at the time) Ryan took
the car to a conveniently close drag strip and did some shake down runs. All
looked good so he trailer the car to LA County Raceway in Palmdale California
for a big import meet late in the year. All the top contenders for a championship
were there including some really (really) high dollar teams. Ryan’s presence
there was as an unknown shade tree budgeted outsider. At the end of the day
he proved to be both the upset and the star of the meet. He pretty much
shut down the opposition to the point that there was no viable competition.
In the predominantly pro classes of drag racing when you beat the next fastest
car by 3-4 lengths in the lights that’s not a race, that’s annihilation. [b]
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