Sent: Tue, 4 Dec 2007 12:00 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. http://forums.nasioc.com/forums/showthread.php?t=3D937176 http://www.slowboyracing.com/estore/home.php?cat=3D4559 Ben ------=_NextPart_000_0018_01C83698.A916ED00 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi = Bill,

I was = planning to go the=20 turbo route. I am worried about gyroscopic forces on the = turbo.

I was = suggesting using the=20 cooling benefit of the water/meth injection to perhaps help to save the = exhaust=20 system from the higher temps of the rotary.

Ben

----- Original Message -----

From:=20 wrjjrs@aol.com

To: Rotary motors in = aircraft

Sent: 12/04/2007 4:26 PM

Subject: [FlyRotary] Re: = Water/Meth=20 injection

Ben,

Are you planning to turbocharge or supercharge? Most turbos = aren't rated=20 for acrobatics. Many use straight methanol rather than water/meth. The = charge=20 density suffers when putting other substances in the engine, So most = only use=20 the water/meth injection to prevent detonation, not to lower temps. =

Bill Jepson

al Message-----
From: Ben Baltrusaitis=20 <expressben@verizon.net>
To: Rotary motors in aircraft=20 <flyrotary@lancaironline.net>
Sent: Tue, 4 Dec 2007 12:00=20 pm
Subject: [FlyRotary] Water/Meth injection

I have moved away from the Rotary (shame on me) and toward the = Subaru. I=20 have been researching how to get more torque and found the only way is = with=20 boost. The street Subaru guys are injecting water and methanol to = avoid=20 detonation under high boost--getting 450 hp from 2.5 liters. The = methanol and=20 water cool the charge while the methanol also increases the = octane. This=20 allows them to run 89 or 91 octane fuel under low boost w/o injection = and have=20 high octane-high boost with injection. The injection is set to start = at a=20 certain boost pressure or rpm level.

I am going to go this route in my aerobatic biplane so I can run = on cheap=20 fuel in econo cruise and still not detonate while doing full throttle=20 aerobatics.

One of the side benefits of this injection is lower EGTs--as much = as 400=20 degrees. Has anyone done any testing with water injection to lower = EGTs?

Another benefit is much cleaner combustion chambers. That = sounds=20 useful to me, too.

http://forums.nasioc.com/forums/showthread.php?t=3D937176=

http://www.slowboyracing.com/estore/home.php?cat=3D4559

Ben

------=_NextPart_000_0018_01C83698.A916ED00--