Return-Path: Received: from out007.verizon.net ([206.46.170.107] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 571270 for flyrotary@lancaironline.net; Fri, 17 Dec 2004 14:17:22 -0500 Received-SPF: pass receiver=logan.com; client-ip=206.46.170.107; envelope-from=rotary.coot@verizon.net Received: from [67.225.117.20] ([67.227.200.78]) by out007.verizon.net (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP id <20041217191647.PUHP27681.out007.verizon.net@[67.225.117.20]> for ; Fri, 17 Dec 2004 13:16:47 -0600 Mime-Version: 1.0 X-Sender: res0c5l1@incoming.verizon.net Message-Id: In-Reply-To: References: Date: Fri, 17 Dec 2004 11:00:52 -0800 To: "Rotary motors in aircraft" From: Ken Welter Subject: [FlyRotary] Re: Ellison vs EFI Content-Type: multipart/alternative; boundary="============_-1108811167==_ma============" X-Authentication-Info: Submitted using SMTP AUTH at out007.verizon.net from [67.227.200.78] at Fri, 17 Dec 2004 13:16:46 -0600 --============_-1108811167==_ma============ Content-Type: text/plain; charset="us-ascii" ; format="flowed" Yes I lost top end power going to the 48 and the most noticeable loss was at high alt, the 48 did improve idle and works much better for slow speed water taxiing and it don't fowl the plugs when taxiing around slow which I do a lot of as I use my plane as a motor boat also however the reason I switched was that my 51 was in the fire a few years back if you remember and at the time there were no 51's available so I went to the 48. Ken >Ken, so you are verifying that you lost power when you went from two >51mm bores to two 48mm bores? (51mm = ~13.11 sq in; 48mm = ~11.21 >sq in; so a 48mm bore is ~ 15% smaller than a 51mm bore). Did you >go with the smaller bores to improve idle? >Thanks, Ken Powell > > >-------------- Original message -------------- > >> Hp don't mean anything as its all in CFM and at that time tne >>biggest they offered was 350 CFM which will work fine on the big >>lunged ancient airplane motors but we need free high flowing >>carburetors, about 650 to 700 CFM is about right. >> > > > > >I'm not following you here. Why is 180 HP more CFM for us than for >an O-360? I just sent them a question to see what the bore >diameter is on the top 3 sizes they list. > > > >I did notice that there was a FAQ on the Ellison page that says they >don't recommend auto fuel, since it could damage components in the >TBI. I'm not sure how much this is real, vs CYA. Ellison doesn't >seem all that much in favor of auto engine conversions in the first >place. > > > >Rusty (already talked to Van's once today, danger, danger) > > > Look at the crude intake manifold on a Lycosoris, it don't have >any CFM ether as they just rely on the big slow moving piston to >suck like hell to get the air in, very crude !!! > I am currently running a 48 Weber, I did have a 51 Weber and there >was a definite loss in power dropping to the 48. > There are ways to control the mixture on a Weber if interested. > I am considering playing with fuel injection but I plan on using a >Weber as the throttle body so the if anything goes wrong with the >injection I can just flip a switch and change over to the carb. > Ken --============_-1108811167==_ma============ Content-Type: text/html; charset="us-ascii" [FlyRotary] Re: Ellison vs EFI
  Yes I lost top end power going to the 48 and the most noticeable  loss was at high alt, the 48 did improve idle and works much better for slow speed water taxiing and it don't fowl the plugs when taxiing around slow which I do a lot of as I use my plane as a motor boat also however the reason I switched was that my 51 was in the fire a few years back if you remember and at the time there were no 51's available so I went to the 48.
 Ken




Ken, so you are verifying that you lost power when you went from two 51mm bores to two 48mm bores?  (51mm = ~13.11 sq in; 48mm = ~11.21 sq in; so a 48mm bore is ~ 15% smaller than a 51mm bore).  Did you go with the smaller bores to improve idle?
Thanks,  Ken Powell
 
-------------- Original message --------------
  Hp don't mean anything as its all in CFM and at that time tne biggest they offered was 350 CFM which will work fine on the big lunged ancient airplane motors but we need free high flowing carburetors, about 650 to 700 CFM is about right.
 
 
I'm not following you here.  Why is 180 HP more CFM for us than for an O-360?   I just sent them a question to see what the bore diameter is on the top 3 sizes they list. 
 
I did notice that there was a FAQ on the Ellison page that says they don't recommend auto fuel, since it could damage components in the TBI.  I'm not sure how much this is real, vs CYA.  Ellison doesn't seem all that much in favor of auto engine conversions in the first place. 
 
Rusty (already talked to Van's once today, danger, danger) 

  Look at the crude intake manifold on a Lycosoris, it don't have any CFM ether as they just rely on the big slow moving piston to suck like hell to get the air in, very crude !!!
 I am currently running a 48 Weber, I did have a 51 Weber and there was a definite loss in power dropping to the 48.
 There are ways to control the mixture on a Weber if interested.
 I am considering playing with fuel injection but I plan on using a Weber as the throttle body so the if anything goes wrong with the injection I can just flip a switch and change over to the carb.
 Ken

--============_-1108811167==_ma============--