[Diy_efi] Source for inexpensive fuel/oil pressure sensors?

[Brendan Patten]

I've got source to pressure transducers from Chrysler 45RFE
transmissions.  They mount external to the trans.  I work for company
that rebuilds them, and every unit gets a new one... Many are probably
fine.  The trans runs from 35-200 psi at times..so It should have broad
range.

Let me know if you are interested. Just pay shipping.

-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]
On Behalf Of Daniel Nicoson
Sent: Wednesday, December 27, 2006 3:36 PM
To: diy_efi at diy-efi.org
Subject: RE: [Diy_efi] Source for inexpensive fuel/oil pressure sensors?

David,

Great info on the OEM sensors.  I didn't know they were that crappy
(tech
term).  I looked at the link you gave.  Nice site, they actually give
good
info on the products.

Thanks,

Dan Nicoson

-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
Behalf Of David Allen
Sent: Wednesday, December 27, 2006 4:19 PM
To: diy_efi at diy-efi.org
Subject: Re: [Diy_efi] Source for inexpensive fuel/oil pressure sensors?

  I 've used a "sender" for a transducer before and it worked. But only
after I carefully logged the resistance versus pressure curve and
programmed
a PIC to interpolate this table into a linear "transducer-like" output.
  Still cost less than a real transducer but what a PITA just to save a
few
$.  The curve on these elcheapo senders is horrible. Repeatability
sucks,
and they degrade over time.  The sensing element is a bourdon tube with
a
copper "arm" rubbing on nichrome wire.  It wears noticabley in a few
hundred
hours of use.
  The following company supplies the OEM I work for with transducers
that
are not too bad expensive and are a very nice piece. We use the 300
series
in a pressure/ vac; 100 PSIa, 150PSIa, 1000PSIa and 10,000 PSIa
versions.
I've 'copped' a couple used ones and have great success datalogging with
them while tuning my engine.
  They even sell online.
http://www.meas-spec.com/myMeas/default/index.asp
  Hope this saves you some time!
David



----- Original Message -----
From: "Daniel Nicoson" <A6intruder at myo-p.com>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, December 27, 2006 3:08 PM
Subject: RE: [Diy_efi] Source for inexpensive fuel/oil pressure sensors?


>I think the oil pressure "sender" on my Mustang costs $6.00 at NAPA.
It's
> really just a variable resistor.  I'm not sure what the response curve
is
> but it shouldn't be too hard to figure out if you have a pressure
gauge
> and
> a pressure source.  Of course your control circuit would have to
interpret
> this variable resistance to be of use.
>
> Dan Nicoson
>
> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org
[mailto:diy_efi-bounces at diy-efi.org]On
> Behalf Of Geddes, Brian J
> Sent: Wednesday, December 27, 2006 3:59 PM
> To: diy_efi at diy-efi.org
> Subject: [Diy_efi] Source for inexpensive fuel/oil pressure sensors?
>
> Hey all -
>
> I'm looking for a source for inexpensive pressure transducers.  I've
> seen lots in the $100-$150 range, but I'm willing to bet that they can
> be had for significantly cheaper.  :)
>
> 1/8 or 1/4 NPT fitting, 5VDC (or 12VDC) power, 0-5 VDC output.  Need
to
> tolerate oil/fuel.  100 or 150 PSI would be perfect.
>
> Any ideas?
>
> Thanks,
> - Brian Geddes
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