X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wproxy.gmail.com ([64.233.184.229] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1056728 for flyrotary@lancaironline.net; Mon, 03 Apr 2006 09:39:35 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.233.184.229; envelope-from=russell.duffy@gmail.com Received: by wproxy.gmail.com with SMTP id i30so1146606wra for ; Mon, 03 Apr 2006 06:38:50 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:from:to:subject:date:message-id:mime-version:content-type:x-priority:x-msmail-priority:x-mailer:importance:in-reply-to:x-mimeole; b=ZvECey9DYf+6EfRXrFExJTbdbanZbQ8rzwb+BaCCSVHI7uNLzxWBO9YpmRorrbBKjg8dmSMk7nJ9VePYpClm4XxKEc0FeIoLXakLju3cVQ+GRNS0OZe3yTLSkqvb4vDHCIBa5S3a6rbYFCD33aciwHlPtOyYTH29JsZStVt0SaM= Received: by 10.54.109.6 with SMTP id h6mr2935440wrc; Mon, 03 Apr 2006 06:38:50 -0700 (PDT) Return-Path: Received: from rd ( [65.6.194.9]) by mx.gmail.com with ESMTP id 12sm607735wrl.2006.04.03.06.38.49; Mon, 03 Apr 2006 06:38:50 -0700 (PDT) From: "Russell Duffy" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Oil pressure port size Date: Mon, 3 Apr 2006 08:38:50 -0500 Message-ID: <000001c65723$f1378fa0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/related; boundary="----=_NextPart_000_0001_01C656FA.086187A0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C656FA.086187A0 Content-Type: multipart/alternative; boundary="----=_NextPart_001_0002_01C656FA.086187A0" ------=_NextPart_001_0002_01C656FA.086187A0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable The oil pressure sending unit on my '87 13B appears to be 10x something. The adapter diameter is right but threads are too course on the = purchased adapter. Barry mentions a 1/8 BSPT which I have never heard of (haven't heard of a lot of things). I went to JC Whitney site and they show a = 1/8x28 BSP adapter. Barry,is this what you're referring to?=20 =20 OK, I just did some searching on the RX-7 club forum, and it sounds like = the oil pressure thread is indeed 1/8"-28 BSPT. Someone offered a link to = the adapter they used to convert to 1/8 NPT. =20 http://www.pegasusautoracing.com/ProductDetails.asp?RecId=3D3142 =20 One of the threads mentioned that Honda also used this size for their = oil pressure fittings, so it's not inconceivable that you may find one of = these adapters hanging on a peg at a local auto parts shop. =20 =20 I just couldn't understand how I was able to just grab a fitting from = the JC Whitney kit if the thread was actually a BSPT, since I figured that = wasn't included. Now that I look at the description of the contents that Tommy sent me, I can see that there was a typo. What was listed as "1/8" = 288SP" should have actually read "1/8" 28BSP". =20 =20 Includes, M10x1.0, M12x1.0, M14x1.5, M16x1.5 and 1/8" 288SP = external-thread adpaters, all with 1/8" x 27NPTF internal thread. P/N 13UC9267A....each $4.99=20 =20 Mystery solved. Now I just have to change my notes. =20 It might be better to get an original Mazda oil pressure sending unit (original one seeps oil) to fill the hole and use a gauge that will be compatible with it and get oil for the re-drive from some other source. = Does anyone know if the Mazda sending unit is compatible with after market gauges? =20 =20 I believe the stock oil pressure sending unit is an odd duck, and = probably not compatible with normal aftermarket gauges. The other problem is = that the stock units (at least on the FD) are probably the least reliable = part on the whole engine. Back when Mazdaformance was in business, they = actually listed the oil pressure sender in the "tune up parts" section :-)=20 =20 Good luck, Rusty (trying to redeem myself) ------=_NextPart_001_0002_01C656FA.086187A0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
The = oil pressure=20 sending unit on my '87 13B appears to be 10x something.  The = adapter=20 diameter is right but threads are too course on the purchased = adapter. =20 Barry mentions a 1/8 BSPT which I have never heard of (haven't heard of = a lot of=20 things).  I went to JC Whitney site and they show a 1/8x28 BSP = adapter.=20 Barry,is this what you're referring to? 
 
OK, I just = did some=20 searching on the RX-7 club forum, and it sounds like the oil = pressure=20 thread is indeed 1/8"-28 BSPT.  Someone offered a link to the = adapter they=20 used to convert to 1/8 NPT.
 
http://www.pegasusautoracing.com/ProductDetails.asp?RecId=3D3142
 
One of the threads mentioned = that Honda=20 also used this size for their oil pressure fittings, so it's not = inconceivable=20 that you may find one of these adapters hanging on a peg at a local auto = parts=20 shop. 
 
I just = couldn't=20 understand how I was able to just grab a fitting from the JC Whitney kit = if the thread was actually a BSPT, since I figured that wasn't=20 included.  Now that I look at the description of the contents that = Tommy=20 sent me, I can see that there was a typo.  What was listed as "1/8" = 288SP"=20 should have actually read "1/8"=20 28BSP".  
 
 Includes, = M10x1.0, M12x1.0,=20 M14x1.5, M16x1.5 and 1/8" 288SP external-thread adpaters, all with 1/8" = x 27NPTF=20 internal thread.
P/N=20 13UC9267A....each $4.99 
 
Mystery=20 solved.  Now I just have to change my=20 notes.
 
It=20 might be better to get an original Mazda oil pressure sending unit = (original one=20 seeps oil) to fill the hole and use a gauge that will be compatible with = it and=20 get oil for the re-drive from some other source. Does anyone know = if the=20 Mazda sending unit is compatible with after market gauges?  
 
I believe = the stock oil=20 pressure sending unit is an odd duck, and probably not compatible = with=20 normal aftermarket gauges.  The other problem is that the = stock units=20 (at least on the FD) are probably the least reliable part on the whole=20 engine.  Back when Mazdaformance was in business, they = actually listed=20 the oil pressure sender in the "tune up parts" section=20 :-) 
 
Good=20 luck,
Rusty (trying to=20 redeem myself)
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