X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp1.uwyo.edu ([129.72.10.36] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTPS id 6284828 for flyrotary@lancaironline.net; Wed, 22 May 2013 12:21:23 -0400 Received-SPF: none receiver=logan.com; client-ip=129.72.10.36; envelope-from=SBoese@uwyo.edu Received: from smtp1.uwyo.edu (localhost [127.0.0.1]) by localhost (Postfix) with SMTP id 870DD2016E9 for ; Wed, 22 May 2013 10:20:49 -0600 (MDT) Received: from ponyexpress-ht3.uwyo.edu (extlb.uwyo.edu [172.26.4.4]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by smtp1.uwyo.edu (Postfix) with ESMTPS id 3627B2015A7 for ; Wed, 22 May 2013 10:20:49 -0600 (MDT) Received: from ponyexpress-hb1.uwyo.edu (10.84.66.35) by ponyexpress-ht3.uwyo.edu (10.84.66.26) with Microsoft SMTP Server (TLS) id 14.2.318.1; Wed, 22 May 2013 10:20:49 -0600 Received: from ponyexpress-m10.uwyo.edu ([fe80::60dd:cb9e:6f71:3d48]) by ponyexpress-hb1.uwyo.edu ([fe80::bc1d:430c:f399:767d%13]) with mapi id 14.02.0318.004; Wed, 22 May 2013 10:20:49 -0600 From: "Steven W. Boese" To: Rotary motors in aircraft Subject: RE: [FlyRotary] Re: combo fuel pressure regulator/filter option? Thread-Topic: [FlyRotary] Re: combo fuel pressure regulator/filter option? Thread-Index: AQHOVv6x3kXHIr1rmU2eEMz7QPEuXpkRWczA Date: Wed, 22 May 2013 16:20:48 +0000 Message-ID: <3E8191F276108F4481AB0721BBA9269E05FAD9CB@ponyexpress-m10.uwyo.edu> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [70.196.196.48] Content-Type: multipart/alternative; boundary="_000_3E8191F276108F4481AB0721BBA9269E05FAD9CBponyexpressm10u_" MIME-Version: 1.0 Return-Path: SBoese@uwyo.edu --_000_3E8191F276108F4481AB0721BBA9269E05FAD9CBponyexpressm10u_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Since this regulator is apparently not referenced to manifold pressure, it = would be interesting to know if it is referenced to atmospheric pressure or= some internal reference. If it is referenced to atmospheric, tuning with Tracy's controller with app= ropriately sized injectors would most likely be effective at a given altitu= de without doing anything special. Since the fuel pressure across the inj= ectors would change with altitude, the mixture would change with altitude a= lso. Most likely, adjusting the manual mixture control would compensate fo= r this. For me, at least, this would not be of particular concern since I= tweak the manual mixture control when settling into a cruise condition any= way. If using an injector pulse based fuel flow rate / fuel remaining instrument= , it may be even more important to operate under the same conditions as tho= se used to develop its calibration since the altitude of operation would in= troduce another variable. Evaluation of the installation under different o= perating conditions would be required to determine whether or not this coul= d cause errors large enough to be of concern. Steve Boese RV6A, 1986 13B NA, RD1A, EC2 ________________________________ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of = Tracy [rwstracy@gmail.com] Sent: Wednesday, May 22, 2013 9:11 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: combo fuel pressure regulator/filter option? Depends on the size and type of injectors used. Would probably work ok wit= h the red ( low flow rate ) Renesis injectors in the primaries. Stock NA = 2nd gen, maybe, larger 550 cc Turbo injectors- probably not. Tracy Sent from my iPad On May 22, 2013, at 10:18, Charlie England > wrote: Good point. I wonder how the Corvette ECU handles it, & whether Tracy's ECU= can be tuned to compensate. Charlie On 05/21/2013 11:11 PM, Bill Bradburry wrote: Charlie, You may want your pressure regulator to follow your manifold pressure. Thi= s would be especially useful at idle if you were set at 58 lbs. Injectors = are flow rated at about 43.5 lbs, so at 58 they would put out more fuel tha= n they were rated for, which could make getting your idle set correctly a p= roblem. Or maybe not?? Bill B ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf Of Charlie England Sent: Tuesday, May 21, 2013 8:18 PM To: Rotary motors in aircraft Subject: [FlyRotary] combo fuel pressure regulator/filter option? Anyone seen one of these? http://www.gmpartsdirect.com/results.cfm?addtocart=3D1&addpartnumber=3D1923= 9926&singlepart=3D1&partnumber=3D19239926 (Other sites have pics; this was just the lowest price I saw with a quick s= earch.) I just saw it in a car magazine about an LS motor installation. Apparently,= the pressure is set at ~58 lbs, but that's the approximate set point for R= X-8 cars, right? I've already set up my dual fuel pumps, dual GM filters as= used by Ed A, and an aftermarket 'hot rod' adjustable regulator, but this = device looks attractive. The weight savings (& money savings) seem to make = it an attractive option.The only downside that's immediately comes to mind = is whether the entire assembly must be replaced to change the filter. Charlie --_000_3E8191F276108F4481AB0721BBA9269E05FAD9CBponyexpressm10u_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Since this regulator is apparently not referenced to manifold pressure, = it would be interesting to know if it is referenced to atmospheric pre= ssure or some internal reference. 

 

If it is referenced to atmospheric, tuning with Tracy's controller with = appropriately sized injectors would most likely be effective at a given alt= itude without doing anything special.   Since the fuel = pressure across the injectors would change with altitude, the mixture would change with altitude also.  Most likely, adjus= ting the manual mixture control would compensate for this.  For me, at= least, this would not be of particular  concern since I tweak the man= ual mixture control when settling into a cruise condition anyway.

 

If using an injector pulse based fuel flow rate / fuel remaining instrum= ent, it may be even more important to operate under the same cond= itions as those used to develop its calibration since the altitud= e of operation would introduce another variable.  Evaluation of the installation under different operating conditions would be required= to determine whether or not this could cause errors large e= nough to be of concern. 

 

Steve Boese
RV6A, 1986 13B NA, RD1A, EC2

 

 

From: Rotary motors in aircraft [flyrotary= @lancaironline.net] on behalf of Tracy [rwstracy@gmail.com]
Sent: Wednesday, May 22, 2013 9:11 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: combo fuel pressure regulator/filter option= ?

Depends on the size and type of injectors used.  Would probably w= ork ok with the red ( low flow rate ) Renesis injectors in the primaries. &= nbsp; Stock NA 2nd gen, maybe, larger 550 cc Turbo injectors- probably not.=

Tracy

Sent from my iPad

On May 22, 2013, at 10:18, Charlie England <ceengland7@gmail.com> wrote:

Good point. I wonder how the Corvette ECU ha= ndles it, & whether Tracy's ECU can be tuned to compensate.

Charlie

On 05/21/2013 11:11 PM, Bill Bradburry wrote:

Charlie,=

You may want yo= ur pressure regulator to follow your manifold pressure.  This would be= especially useful at idle if you were set at 58 lbs.  Injectors are flow rated at about 43.5 lbs, so at 58 they would= put out more fuel than they were rated for, which could make getting your = idle set correctly a problem.   Or maybe not??

&= nbsp;

Bill B

&= nbsp;

= From: Rotary motors in aircraft [mailto:flyrotary@lancairo= nline.net] On Behalf Of Charlie Englan= d
Sent: Tuesday, May 21, 2013= 8:18 PM
To: Rotary motors in aircra= ft
Subject: [FlyRotary] combo = fuel pressure regulator/filter option?<= span style=3D"COLOR: windowtext">

 

Anyone seen one of the= se?
http://www.gmpartsdirect.com/results.cfm?addtocart=3D1&addpart= number=3D19239926&singlepart=3D1&partnumber=3D19239926
(Other sites have pics; this was just the lowest price I saw with a quick s= earch.)

I just saw it in a car magazine about an LS motor installation. Apparently,= the pressure is set at ~58 lbs, but that's the approximate set point for R= X-8 cars, right? I've already set up my dual fuel pumps, dual GM filters as= used by Ed A, and an aftermarket 'hot rod' adjustable regulator, but this device looks attractive. The weig= ht savings (& money savings) seem to make it an attractive option.The o= nly downside that's immediately comes to mind is whether the entire assembl= y must be replaced to change the filter.

Charlie


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