Message-ID: <008601c424a4$c1c3fd20$6401a8c0@Davidscmptr>
Reply-To: "David Carter" <dcarter@datarecall.net>
From: "David Carter" <dcarter@datarecall.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-3175904@logan.com>
Subject: Re: [FlyRotary] intake ideas?
Date: Sat, 17 Apr 2004 12:52:30 -0500
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Russell, you will be on as solid ground as anyone else to simply use the
Atkins "short intake".  I've visited with him extensively, visited his shop
and asked every question I could think of, and here's what Dave says and I
believe to be so on intake manifolds:

We have 2 choices:  1) Long tuned manifolds that have more resistance to
mass flow of air, or 2) the short untuned manifold (used by Mazda Racing??)
which gives higher mass flow.
    -  They both generate about same torque and HP but 2) has less space
problem.
    -  Dave is a competive racer and is one of those guys with max
experience with rotaries - and he is quite comfortable with the short
manifold.

I'm going to start off with the Atkins short manifold - or one similar that
fits the RX-8 Renesis engine.

David

----- Original Message ----- 
From: "Russell Duffy" <13brv3@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, April 17, 2004 1:27 PM
Subject: [FlyRotary] intake ideas?


> Maybe it's safe to ask this while Ed's away :-)
>
> I'm still thinking of what I'll do for intake #3, and I have to admit that
I
> haven't really paid much attention to any of the dynamic tuning topics,
> since I didn't figure I could fit the resulting manifold in the cowl.  It
> just dawned on me that Tracy has a good intake, which fits under his RV-4
> cowl.  Unfortunately, I don't remember anything about it, and can't find a
> picture.  Does anyone have a picture that shows Tracy's intake.  Actually,
> I'd like to see pics of anyone's intake, just to get some ideas.
>
> The current thought is to get the primary injectors back in the block, and
> mount the secondary injectors as close as possible.  Does anyone know if
the
> turbo, and non-turbo injectors are interchangeable?  I'm pretty sure they
> must fit the same hole in the block, but how about the fuel rails?  FWIW,
I
> know (all too well) that the connectors are different.
>
> I have to admit, that it's going to be difficult to resist modifying the
> short, straight intake that I got from David, and using it with my old TWM
> TB.  This will give two injectors in the block, and two in the TB.  Since
it
> will be so short (about 10 inches), it will be far less than ideal, but I
> can't say if it will be better or worse than my current intake until I try
> it.  This is probably the simplest thing to try at the moment.  Now that I
> think about it, I could probably practically bolt it on, without
> modification (to fit under the cowl) to see how it compares with the other
> intake in static rpm.  Hmmmm....
>
> Thanks,
> Rusty (in search of the universal intake)
>