Return-Path: <13brv3@bellsouth.net> Received: from [209.114.234.2] (HELO IPOfCard1.guest-tek.com) by logan.com (CommuniGate Pro SMTP 4.2b2) with ESMTP id 3176253 for flyrotary@lancaironline.net; Sat, 17 Apr 2004 19:36:30 -0400 Received: from USDCLES112NB160 ([198.18.1.149]) by IPOfCard1.guest-tek.com (8.11.6/8.11.6) with SMTP id i3HNNYu04621 for ; Sat, 17 Apr 2004 19:23:34 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: intake ideas? Date: Sat, 17 Apr 2004 19:35:35 -0500 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0036_01C424B3.27BC3C10" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0036_01C424B3.27BC3C10 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit > I'm using Atkins short manifold with a TWM TB. > The primary injectors are in the block. > I bored out the bosses on the top of the secondary runners and installed the secondary injectors directly in the manifold. > They are spaced perfectly to use the stock fuel rail. Thanks Jim, that's interesting to know. I don't recall the bosses you're talking about, but I'll look when I get home next weekend. Best I recall, the intake and TWM "might" fit under the cowl, if I don't have the injectors sticking up on the top of the TWM. I was thinking about trying to modify the flange to turn the TWM over 180 degrees, so the injectors would be on the bottom side. The other option was to angle the flange down about 45 degrees, to let the injectors clear the top of the cowl cheek. Your alternate injector idea might give me a third option. Are you running a 6-port engine? The other problem I have with the Atkins intake is that it has huge secondary ports, made to cover the ports in the 6-port. The secondary ports are much larger than the ports on my 4-port engine. There are a couple ways I could fix that, but with all the mods, it almost seems (I never learn ) easier to make a similar intake from scratch. This port mismatch is something that is certainly bad, but "just how bad" is the question. My previous manifold was the Atkins wrapover intake, and it had the same mismatch. I never even noticed until after I removed it. The turbo might have made it less of an issue. Cheers, Rusty ------=_NextPart_000_0036_01C424B3.27BC3C10 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

> I'm using Atkins short manifold with a TWM = TB.
> The=20 primary injectors are in the block.
> I bored out the bosses on = the top of=20 the secondary runners and installed the secondary injectors directly in = the=20 manifold.
> They are spaced perfectly to use the stock fuel=20 rail.

Thanks = Jim, that's=20 interesting to know. I don't recall the bosses you're talking = about, but=20 I'll look when I get home next weekend. Best I recall, the intake = and TWM=20 "might" fit under the cowl, if I don't have the = injectors sticking up=20 on the top of the TWM. I was thinking about trying = to modify the=20 flange to turn the TWM over 180 degrees, so the injectors = would be on=20 the bottom side. The other option was to angle the flange = down about=20 45 degrees, to let the injectors clear the top of the cowl=20 cheek. Your alternate injector idea might give me a = third=20 option.

Are you = running a 6-port=20 engine? The other problem I have with the Atkins = intake is=20 that it has huge secondary ports, made to cover the ports in = the=20 6-port. The secondary ports are much larger than the = ports on=20 my 4-port engine. There are a couple ways I could fix that,=20 but with all the mods, it almost seems (I never learn=20 <g>) easier to make a similar intake from scratch. =20

This port = mismatch is=20 something that is certainly bad, but "just how bad" is the = question. My=20 previous manifold was the Atkins wrapover intake, and it had the same=20 mismatch. I never even noticed until after I removed = it. =20 The turbo might have made it less of an issue.

Cheers,

Rusty = =20

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