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Message-ID: <4A42F7AB.3080601@austin.rr.com>
Date: Wed, 24 Jun 2009 23:06:03 -0500
From: Dennis Haverlah <clouduster@austin.rr.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: 295cc vs 495 cc Renesis Test[FlyRotary]
References: <list-3731615@logan.com>
In-Reply-To: <list-3731615@logan.com>
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Guys,

I have been flying for 2 years with the original Mazda Renesis Red 295 
cc primaries and Blue 495 secondary injectors.  These injectors were 
with the engine when I bought it.  About 6 weeks ago I installed a new 
tuned intake that required me to replace the blue 495 cc Mazda injectors 
with 540 cc injectors Bobby Hughes had purchased but never used.  I do 
not know the brand of the 540 cc injectors and they do not have a 
distinctive color.  Bobby has been encouraging me to replace the red 295 
cc primary injectors with the blue 495 cc injectors that I had removed 
from the original intake because he felt it would be much better to have 
primaries and secondaries that are similar in size.  After my ground 
test run at high power with only the 295 cc red primaries operating I 
finally agreed and replaced the red injectors with the blue 495 cc units 
I had removed when I installed the new intake.  Now I am running with 
blue 495 cc units as my primaries and Bobby's 540 cc injectors as my 
secondaries.  I hope to do some more MAP tuning and fly with these 
injectors tomorrow.
With the primaries OFF I can operate the engine at full power on the 
ground.  I do not see any appreciable performance difference with the 
primaries off or on at full power.
Because of the recent injector size changes my fuel flow and HP numbers 
will need to be recalibrated.

Dennis H.
Bill Bradburry wrote: