Return-Path: Sender: (Marvin Kaye) To: flyrotary@lancaironline.net Date: Tue, 03 Feb 2004 02:32:21 -0500 Message-ID: X-Original-Return-Path: Received: from grebe.mail.pas.earthlink.net ([207.217.120.46] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2971956 for flyrotary@lancaironline.net; Mon, 02 Feb 2004 22:36:09 -0500 Received: from user-33qt548.dialup.mindspring.com ([199.174.148.136] helo=Carol) by grebe.mail.pas.earthlink.net with smtp (Exim 3.33 #1) id 1AnrM6-0006Se-00 for flyrotary@lancaironline.net; Mon, 02 Feb 2004 19:36:07 -0800 X-Original-Message-ID: <001f01c3ea06$c56b6900$0000a398@Carol> From: "sqpilot@earthlink" X-Original-To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Non-EFI fuel systems X-Original-Date: Mon, 2 Feb 2004 21:35:27 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001C_01C3E9D4.797BF050" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2727.1300 This is a multi-part message in MIME format. ------=_NextPart_000_001C_01C3E9D4.797BF050 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable [FlyRotary] Re: Non-EFI fuel systems ----- Original Message -----=20 From: Ken Welter=20 To: Rotary motors in aircraft=20 Sent: Monday, February 02, 2004 8:58 PM Subject: [FlyRotary] Re: Non-EFI fuel systems Nice job on the intake manifold, Rusty. Thanks for the info = regarding the Ellison throttlebody. Did it have a provision for = leaning? (similar to a standard aircraft carb)? Thanks. Paul Conner=20 Thanks, and I'm sure you can imagine that you're seeing the best = side :-) I'll know if it actually fits in about an hour. As for the Ellison, yes, it has a mixture control.=20 Sorry Ken, but I don't agree with your view of airflow on these = units. I think they're more than suitable for the average NA 13B. To = get a 180 HP, doesn't it take a set amount of air, and fuel? If so, why = would we need so much more airflow than a Lycoming O-360? Cheers, Rusty (in search of argon)=20 Sorry to say but I think you are dead wrong on the need for high = airflow on the rotary and there is no way 350 CFM will work unless you = want to fly a turd. =20 You did a fine job making that high flow manifold and I bet you wont = put a 350 CFM throttle body on it. I had 1000 hrs flying time on my old coot with a 51 Weber and when I = rebuilt it I could not get another 51 as they are hard to come by so I = went to a 48mm instead and there was a noticeable drop in power and I = would switch back to a 51 if I weren't go to a turbo. For anyone thinking of a Weber I will say there are pros and cons = between a 48 and a 51, the 51 puts out more power but it is = temperamental on jetting and it runs rough on the bottom end compared to = the 48, there is also a 55mm Weber but I have had no experience with it = but would consider it. For the best deal on Weber carbs check out performance parts = warehouse at http://www.webercarburetors.com Ken Hi, Ken....Check out Mazdatrix. On their home page, click on racing, = then click on Weber IDA carbs, and you will see that they have both the = 48mm and the 51mm. The 48mm costs $575.00, and the bored-out 51mm, part = number 16602, sells for $850.00. If I thought this would bolt right on to a manifold, and have = provisions for leaning at altitude, my EFI would go back in the closet. = Did I say I like to keep it simple, no high pressure pumps, fuel sumps = with fuel returns, MAP settings to deal with, etc? I find it much = easier to simply lean the mixture with altitude than to try to set up = all this fancy EFI system. Thanks for the info. Paul Conner ------=_NextPart_000_001C_01C3E9D4.797BF050 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable [FlyRotary] Re: Non-EFI fuel systems
 
----- Original Message -----
From:=20 Ken=20 Welter
Sent: Monday, February 02, 2004 = 8:58=20 PM
Subject: [FlyRotary] Re: = Non-EFI fuel=20 systems

Nice job on the = intake=20 manifold, Rusty.    Thanks for the info regarding the = Ellison=20 throttlebody.   Did it have a provision for leaning?  = (similar to a standard aircraft carb)?   Thanks.  = Paul=20 Conner 
 
Thanks, and=20 I'm sure you can imagine that you're seeing the best side = :-)  =20 I'll know if it actually fits in about an hour.
 
As for the=20 Ellison, yes, it has a mixture control. 
 
Sorry Ken,=20 but I don't agree with your view of airflow on these units.  I = think=20 they're more than suitable for the average NA 13B.  To get = a 180 HP, doesn't it take a set amount of air, and = fuel?  If=20 so, why would we need so much more airflow than a Lycoming = O-360?
 
Cheers,
Rusty (in=20 search of argon) 
 
 
  Sorry to say but I think you are dead wrong on the need = for high=20 airflow on the rotary and there is no way 350 CFM will work unless you = want to=20 fly a turd.    

 You did a fine job making that high flow manifold and I bet = you=20 wont put a 350 CFM throttle body on it.
 
 I had 1000 hrs flying time on my old coot with a 51 Weber = and when=20 I rebuilt it I could not get another 51 as they are hard to come by so = I went=20 to a 48mm instead and there was a noticeable drop in power and I would = switch=20 back to a 51 if I weren't go to a turbo.

 For anyone thinking of a Weber I will say there are pros = and cons=20 between a 48 and a 51, the 51 puts out more power but it is = temperamental on=20 jetting and it runs rough on the bottom end compared to the 48, there = is also=20 a 55mm Weber but I have had no experience with it but would consider = it.

 For the best deal on Weber carbs check out performance = parts=20 warehouse at http://www.webercarburetors.com

 Ken
 
Hi, Ken....Check out Mazdatrix.  = On their=20 home page, click on racing, then click on Weber IDA carbs, and you = will see=20 that they have both the 48mm and the 51mm. The 48mm costs $575.00, and = the=20 bored-out 51mm,  part number 16602, sells for = $850.00.
      If I = thought this=20 would bolt right on to a manifold, and have provisions for leaning at=20 altitude, my EFI would go back in the closet.  Did I say I like = to keep=20 it simple, no high pressure pumps, fuel sumps with fuel returns,=20 MAP settings to deal with, etc?   I find it much easier = to=20 simply lean the mixture with altitude than to try to set up all this = fancy EFI=20 system.  Thanks for the info.  Paul=20 Conner
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