Return-Path: <13brv3@bellsouth.net> Received: from imf23aec.mail.bellsouth.net ([205.152.59.71] verified) by logan.com (CommuniGate Pro SMTP 4.1.1) with ESMTP id 2524178 for flyrotary@lancaironline.net; Fri, 15 Aug 2003 19:38:41 -0400 Received: from rad ([68.212.2.228]) by imf23aec.mail.bellsouth.net (InterMail vM.5.01.05.27 201-253-122-126-127-20021220) with ESMTP id <20030815233841.SMBK8750.imf23aec.mail.bellsouth.net@rad> for ; Fri, 15 Aug 2003 19:38:41 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "Flyrotary List" Subject: boost controllers Date: Fri, 15 Aug 2003 18:38:42 -0500 Message-ID: <008801c36386$5cb10b60$0201a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0089_01C3635C.73DB0360" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0089_01C3635C.73DB0360 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Greetings, =20 Has anyone ever seen an aftermarket boost controller that uses a motor = of some sort to directly drive the wastegate? =20 =20 I've found a couple of controllers that will work as absolute pressure devices (HKS EVC IV atm, and EVC PRO), but they use a stepper motor as a variable air leak for the normal wastegate actuator. Even this would be = a step forward, but I'd need an actuator with a light spring. Of course I can't tell how low these controllers will regulate, since they only brag about the high end. Anyway, something else to think about. =20 =20 Speaking of light springs in the actuator, how light could you go and = still have it work? In other words, if there was nothing hooked up to the wastegate lever, would it have a tendency to open, or close? I'm = guessing that it would try to open, so you need some spring pressure to hold it closed, but how much, I haven't a clue. As usual, more questions than answers... =20 I'm starting to imagine a big RC servo being controlled by some sort of electronics connected to a MAP sensor. Hey Tracy, how about throw that = into my EM-2 :-) =20 Rusty The end is near... uhh, make that in sight :-) ------=_NextPart_000_0089_01C3635C.73DB0360 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
Greetings,
 
Has anyone ever = seen an=20 aftermarket boost controller that uses a motor of some sort to directly = drive=20 the wastegate? 
 
I've found a = couple of=20 controllers that will work as absolute pressure devices (HKS EVC IV = atm,=20 and EVC PRO), but they use a stepper motor as a variable air leak for=20 the normal wastegate actuator.  Even this would be a step = forward, but=20 I'd need an actuator with a light spring.  Of course I can't tell = how low=20 these controllers will regulate, since they only brag about the high = end. =20 Anyway, something else to think=20 about.    
 
Speaking of = light springs=20 in the actuator, how light could you go and still have it work?  In = other=20 words, if there was nothing hooked up to the wastegate lever, would it = have a=20 tendency to open, or close?  I'm guessing that it would try to = open, so you=20 need some spring pressure to hold it closed, but how much, I haven't a=20 clue.  As usual, more questions than answers...
 
I'm starting to = imagine a=20 big RC servo being controlled by some sort of electronics connected to a = MAP=20 sensor.  Hey Tracy, how about throw that into my EM-2=20 :-)
 
Rusty
The end is = near... uhh,=20 make that in sight :-)
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