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Date: Wed, 10 Jun 2009 12:54:27 -0700
From: Dale Rogers <dale.r@cox.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Injectors quandary.
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Chris,

    There was a lot of traffic on this subject in 2003.  IIRC Ed
Anderson was/is using MSD injectors (2012?).  Dunno if they
will fit the Mistral manifold, though.

   Some interesting info here:
http://www.robietherobot.com/Storm/fuelinjectorguide.htm

and here:
http://www.importperformanceparts.net/imports/accelfuelinj-choose.html

HTH,
Dale R.


> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Christopher Barber
> Sent: Wednesday, June 10, 2009 2:38 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Injectors quandary.
>
> The list is WAY too quiet. So, I thought I would pose this concern/question.
>
> I am wanting to get new/rebuilt injectors.  I tried to get some a while 
> back and ordered 4 Mazda injectors.  It was at this time I discovered 
> that the stock Mazda injectors do NOT fit the Mistral intake.  My former 
> build helper originally found the injectors I have been using.  The are 
> seriously mismatched at about 550 cfm and 1600 cfm.  I know the EC2 can 
> compensate (perhaps with some difficulty due to the extreme difference), 
> but I am wanting to replace them all with about 550ish injectors.  
> Perhaps it will help some of my leaning issues, perhaps not..
>
> I am having a couple of issues.  First, getting the right PHYSICAL 
> size.  While the ones I am using in the Mistral Intake look a great deal 
> like the Mazda injectors, they are different in physical dimensions.  
> The ones I have come back with a Chrysler (Deko) and Ford Part numbers, 
> but seem to be very old part numbers have been difficult to find online 
> (my local auto shop and speed shop has been no help...I seem to know 
> more than they do about the topic even though they did try to help).  
> Are there "standard" known physical types with some kind of verbiage 
> that will allow me to get the proper fit?  Or do I use my calipers, go 
> for the couple of sets I have found with dimensional drawings, order 
> them and hope for the proper fit?  I just do not know the "standards" 
> used and I yet been unable to find the answer online....gee, I may have 
> to resort to live persons in an auto electrical shop <g>.  Some of the 
> injectors seems short and stubby and some long and skinny...some, 
> indistinguishable to the untrained eye, like the different ones I have now.
>
> I know, due to my ignorance, I may be making this harder than it is, but 
> hey, it is part of the learning.
>
> SECOND.  Since I am ordering new injectors anyway, I am curious about 
> the impedance.  The current ones are low impedance.  Thus, I am using 
> the resistors in series with each injector.  I know the EC2 does not 
> seem to mind this at all, however, since I am replacing them, is it wise 
> to remove this minor failure point (the connections to the resistors 
> etc) and buy high impedance injectors and remove the resistors?  Does 
> one have a significant advantage over the other?  Seems if you can 
> reduce the parts count (heh, like in the rotary), it may be better.
>
> Thanks guys.  Hope this helps pick up list activity a bit too.
>
> All the best,
>
> Chris
> Houston
>
>