Mailing List flyrotary@lancaironline.net Message #9387
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Re: [FlyRotary] Re: EC2 programming
Date: Fri, 2 Jul 2004 22:54:24 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
Well, that is one of the reason you frequently find the BIG flow injectors (say for racing) are of the Peak and Hold type.  Using a large flow saturation type would be a bear to get a good idle.  I happen to use the peak and hold Mazda injectors myself and have no problem with idle.
 
Somebody take away Rusty's motorcycle helmet.
 
Ed
 
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
Sent: Friday, July 02, 2004 10:33 PM
Subject: [FlyRotary] Re: EC2 programming

According to MSD the Satuation types take approx 2 milliseconds to open whereas the Peak and hold only take 1.5 milliseconds. 
 
I've always wondered if this wasn't the key to why some people get better idle than others.  I recently changed my primaries from 550 Saturation type, to 460 saturation type, and didn't see any difference in idle.  I wonder if a set of 460 peak and hold injectors, with a minimal size resistor (more punch, but still within the driver's current limit) wouldn't work better.  
 
Rusty (somebody stop me from buying motorcycles!) 
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