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I am also using some of Atkins stuff. I have his intake manifold ready to bolt on, but keep wanting to run the stock turbo that I have. I am about to call Dave Atkins to get the connectors for the injectors you mention. The engine he sells comes with 2 ’91 stock turbo injectors and 2 of those that fit his manifold. So I am hoping that they are close to the 550cc that the other injectors are at. I do know that they are low impedance while the stock injectors are high impedance. Will let you know what Dave says.

More than anything, I am hoping that Paul will make a duplicate of his intake manifold for me (hint hint Paul) so I can have a quality manifold. The one I currently dreaming up is a bastardization of the stock and the Atkins with big ugly cubic transition areas. (Please Paul save me from this ugly fate… make 2 manifolds ;-)

David Leonard

The Rotary Roster:

http://members.aol.com/_ht_a/rotaryroster/index.html

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of 13brv3@mchsi.com
Sent: Sunday, February 23, 2003 9:48 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Injectors

Hi, fellow rotary enthusiasts....I have Dave Atkin's fuel and ignition system. I am trying to identify my fuel injectors, as Rusty wanted to know what size they were. All I can find stamped on them are the following numbers. 171049 and 9211. Anyone have any idea what brand and size these might be? Thanks in advance for your replies. Paul Conner, 13B powered SQ2000 under construction.

Hi Paul,

Does your TB say TWM on it? That's what I got from Dave, but I didn't order the whole enchilada. There's a decent amount of info on the TWM site at- http://www.twminduction.com/Home/Home-FR.html but it doesn't show any injector part numbers similar to the ones you quoted. Here's another silly question, do you have two, or four injectors?

I'm still curious to know what you got from Dave, but I will be ordering a couple of injectors from TWM. One thing I found out from Tracy was that his ECU requires 4 injectors of similar size. In other words, you can't use two 550's, and two 850's like they do in the 3rd gen RX-7's. TWM sells a Rochester injector for their TB that's 525 cc/min at 43.5 psi, so I'll get two of those to go with the two stock 550's that I have for the primaries.

Rusty