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

If I might suggest a pair of Jerry's PP inserts will fix Tracy's HP
problems!!!  (along with new intake and exhaust systems - Tracy, ain't
it great to be on the leading edge!).

Ken Powell

I warned him about the low power RX8 engine but he would not listen :)
We shall see if it is ever as fast as his old engine. Bruce Turrentine
has him hung up on intake velocity :)

Paul Lamar
 
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