----- Original Message -----
Sent: Tuesday, December 04, 2007 3:00
PM
Subject: [FlyRotary] Water/Meth
injection
I have moved away from the Rotary (shame on me) and toward the Subaru.
I have been researching how to get more torque and found the only way is
with boost. The street Subaru guys are injecting water and methanol to avoid
detonation under high boost--getting 450 hp from 2.5 liters. The methanol
and water cool the charge while the methanol also increases the octane.
This allows them to run 89 or 91 octane fuel under low boost w/o injection
and have high octane-high boost with injection. The injection is set to
start at a certain boost pressure or rpm level.
I am going to go this route in my aerobatic biplane so I can run on
cheap fuel in econo cruise and still not detonate while doing full throttle
aerobatics.
One of the side benefits of this injection is lower EGTs--as much as
400 degrees. Has anyone done any testing with water injection to lower
EGTs?
Another benefit is much cleaner combustion chambers. That sounds
useful to me, too.
Ben