Tracy is dealing with water coolant plumbing problems as we speak.
It is still running hot. I just got off the phone.

He is also disappointed in his cool air duct to the intake system
with several inches of water drop. Also his HP is down compared to his
old engine. Some of that is no doubt related to the pressure drop.
Some pressure drop is due to a long SCAT hose but some is due 
to the NACA duct used instead of a ram air scoop. During the Sun 100
race he was reporting 32 inches of Hg in the intake system.
His last engine used the large third gen intake ports while this
engine uses the low power auto TX version of the RX8 engine with smaller
ports. It is too early to say for sure that this version of the 
RX8 engine will generate less HP than a 3rd gen engine but that 
is my humble opinion. Note the small size of the intake ports in the pic below.
Here too is a picture of the high power RX8 intake ports for comparison.

Every time you make what appears to be a simple change new problems occur.

His new intake system looks like this currently.
The plywood box will be replaced by a metal box eventually.

One thing about Tracy. He enjoys going against and ignoring conventional wisdom :)
It will be interesting to see what he eventually winds up with :)

Paul Lamar
 
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