billdunn wrote:

1.) Realistically, how much space is required ?

Fits in most stock cowls. Tight fit in a Kis Cruiser or Lancair 320.
the block is 17 inches long by 11 inches wide by 12 inches high.
Add 3" to 4" for oil pan and 2" for intake manifold on top. 
Tracy's gear box is 14 inches long.

2.) Can the engine be rotated 90 degrees so the base is facing right or left, for space savings ?
Could new attach points be welded on ? Is base down the optimal for space savings ?

Not recommended but has been done. There is no space savings. Back in the
old days 30 years ago when we had distributors there was a height advantage.
Those days are gone forever using crank angle sensors or e-shaft triggers.
You just ask for cooling and oil feed problems if you rotate the engine.

3.) How much weight can be saved by using aluminum or other metal when possible ?

About 50 pounds for all three end and intermediate housing. They will cost
you $4500 alone.

4.) what are the pertinent differences between the 2.85 reducing unit vs the 2.2
PSRU-------weight, performance, serviceability, robustness of design ?

Everything is pretty much the same except the 2.85 will allow you
to rev the engine up to 7500 for takeoff gaining 10% to 20% in
increased HP. 

5.) What do you expect a final installation to weigh ?

Firewall forward 300 to 330 pounds depending on how well you
design the motor mounts and the cooling system

6.) Are there after market ignition systems which are lighter than stock ?

Yes. The coils used on the GM LT1 Corvette V8 can be fired by Tracy's EFI/IGN
ignition system

7.) how much does the starter weigh ? Flywheel ?

Between 5 and 7 pounds for the starter. A true flywheel is
not used. An auto transmissions flex plate is normally used
and I am not sure about the weight. I would say under three pounds.

8. How much weight does a turbocharger add to the installation ?

About 35 pounds but you save 10 to 20 pounds by not having a muffler.

Any info appreciated----thanks

Bill

Paul Lamar
 
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