Mailing List flyrotary@lancaironline.net Message #8040
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Re: [FlyRotary] Rusty's 3rd intake
Date: Tue, 11 May 2004 23:04:27 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
Sorry, Rusty
 
    My current two tube intake simply has a "U" inside the box connecting the two tubes (for the pulse tuning) and then a hole on the front that feeds the both arms of the "U" that the throttle body fits over.  I'll try to find a drawing or photo
 
Ed
 
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
Sent: Tuesday, May 11, 2004 9:49 PM
Subject: [FlyRotary] Rusty's 3rd intake

Thanks to all who commented on the TB choice.  I have ordered a 65mm Edelbrock unit that fits a 5.0L mustang. 
 
Thanks also for the links to places who sell parts.  Alex, that link was great!
 
Finally, thanks to Ed for his pictures, even though he's messing with my mind.  I could have sworn that his last intake had only two tubes, not four like in the pics he sent.  Of course his adjustable intake does have two tubes.  I was actually looking for pics of how the two tube chamber was made, but I think I understand. 
 
I had 4 hours of dodging tourists along Hwy 98 today to think about my plans.  I'll describe my plans, and I'd like to hear any comments you might have. 
 
The plan is to use the Atkins short, straight intake that I got from Dave L.  This takes the four ports, and combines them into two, with a 2" ID hole on the TB end.  It has two bosses on top of the secondary runners, which (as someone pointed out earlier) are spaced perfectly for the stock secondary fuel rail.  I'll plan to install two injectors there, as well as the normal two primaries in the center housing.  I'll then take two pre-bent 45 degree pieces of 2"OD x .065 tubing, and weld them to a flange that will bolt to the intake where the TB normally goes.  The bend will angle down, to clear the cowl, but stay above as high as possible above the exhaust.  This will likely be cut off about two inches after the bend, and will complete the intake portion.  The TB portion will be (unfortunately) made from fiberglass, due to the goofy shape.  The plan will be to make a U shaped tube out of fiberglass, that fairs into a flat portion on the bottom side, just large enough for the 65mm TB.  I'll connect the two pieces with rubber hose for testing/tuning purposes, but will likely replace the rubber with aluminum tubing once a final length is reached.  
 
OK, so there it is.  What do you think?  It will have to be a big improvement over what I have now, at least in the throttle response category.  If I can manage to get any reasonable length out of the tubes, I can hopefully get some tuning for power as well. 
 
Thanks,
Rusty (I want to be just like Ed)
 
 
Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster