[DeTomaso] Oil Pressure Gauge Part Deux - Mechanical Gauge Test

Dave Londry davel at emspace.com
Mon Sep 5 20:38:48 EDT 2016


Pricey but here's 75 Ohm

http://www.digikey.com/product-detail/en/ohmite/RES75RE/RES75RE-ND/824049

$43 + $9 shipping.

dave


On 2016-09-04 6:11 AM, Joseph F. Byrd, Jr. wrote:
> Instead of grounding, use a $5 rheostat from Radio Shack.  At full ohms, the
> gauge should indicate mid scale (35psig) and smoothly go to full scale as
> you turn rheostat to ground.
>
> This was the only suitable rheostat my search of RS found, finding a 75 ohms
> would let you test the gauge over its full range
>
> Joe
>
> -----Original Message-----
> From: DeTomaso [mailto:detomaso-bounces at server.detomasolist.com] On Behalf
> Of Mike Drew via DeTomaso
> Sent: Saturday, September 03, 2016 17:44 PM
> To: Mike Thomas
> Cc: Pantera Mail List
> Subject: Re: [DeTomaso] Oil Pressure Gauge Part Deux - Mechanical Gauge Test
>
> Sorry sent too soon.
>
> As I was saying, with the wire not connected the gauge should read zero.
> Does it?  If so, with the key on and the end of the wire grounded to the
> engine, does it max out the gauge? I think that would be the correct set of
> readings (somebody with electrical smarts correct me if I am wrong)
>
> Assuming I am right, that the gauge should read max if the key is on and the
> end of the wire is grounded, then if it is not deliberately grounded but
> still reads max, that suggests a shirt in that wire I.e. it is cut somewhere
> and grounding out against metal.
>
> Just a guess...
>
> At least you know you can drive the car as-is until you come up with a
> solution?
>
> Mike
>
> Sent from my iPhone
>
> On Sep 3, 2016, at 14:03, "Mike Thomas" <mbefthomas at comcast.net> wrote:
>
>>    Received the mechanical gauge from Mike Drew today (thanks Mike).  Put
>>    it on and started the motor, and it reads 60 lbs. at start and warm up
>>    at 1500 RPM's,  not much less at idle (~900 when the choke lets go(,
>>    and only a little more when I rev.  That doesn't seem right.  I would
>>    expect it to drop pretty low at idle.
>>
>>
>>    Thoughts?
>>
>>
>>    Mike Thomas
>>
>>
>>    From: Richard Greenblum [mailto:richard at richardgreenblum.com]
>>
>>    Sent: Friday, September 02, 2016 7:19 PM
>>    To: Mike Thomas <mbefthomas at comcast.net>
>>    Subject: Re: [DeTomaso] Oil Pressure Gauge
>>
>>
>>    Thanks Mike, I'm going to look him up.
>>    Sent from my iPhone
>>
>>    On Sep 2, 2016, at 18:43, Mike Thomas <[1]mbefthomas at comcast.net>
>>    wrote:
>>
>>    Rick Sanchez
>>
>>
>>    From: Richard Greenblum [[2]mailto:richard at richardgreenblum.com]
>>    Sent: Thursday, September 01, 2016 5:53 PM
>>    To: Mike Thomas <[3]mbefthomas at comcast.net>
>>    Subject: Re: [DeTomaso] Oil Pressure Gauge
>>
>>
>>    Know it well, the zip code is 78154. It's right outside San Antonio and
>>    next to Randolph AFB, where I was stationed for most of my Air Force
>>    Reserve career. About 60 miles from my house in Austin. I'm sure
>>    Michael Frazier knows him.
>>    Sent from my iPhone
>>
>>    On Sep 1, 2016, at 19:38, Mike Thomas <[4]mbefthomas at comcast.net>
>>    wrote:
>>
>>    Actually in a town called Schertz, not sure how close that is to you.
>>    Zip is 87154.
>>
>>    Mike
>>
>>
>>    From: Richard Greenblum [[5]mailto:Richard at richardgreenblum.com]
>>    Sent: Thursday, September 01, 2016 7:41 AM
>>    To: Mike Thomas <[6]mbefthomas at comcast.net>
>>    Subject: Re: [DeTomaso] Oil Pressure Gauge
>>
>>
>>    That wasn't me, Mike.  If there's another Richard in Austin with a
>>    Pantera, I'd like to meet him!
>>
>>
>>    Did you attend the Rally two years ago put on by Space City Panteras?
>>
>>
>>
>>    From: Mike Thomas <[7]mbefthomas at comcast.net>
>>    Date: Wednesday, August 31, 2016 at 22:17
>>    To: Richard Greenblum <[8]richard at richardgreenblum.com>
>>    Subject: RE: [DeTomaso] Oil Pressure Gauge
>>
>>
>>    Thanks Richard
>>
>>    Are you the same Richard in Texas who just bought my firewall cover?
>>
>>    Mike
>>
>>
>>    -----Original Message-----
>>
>>    From: Richard Greenblum [[9]mailto:richard at richardgreenblum.com]
>>
>>    Sent: Wednesday, August 31, 2016 6:13 PM
>>
>>    To: Mike Thomas <[10]mbefthomas at comcast.net>
>>
>>    Subject: Re: [DeTomaso] Oil Pressure Gauge
>>
>>
>>    Mike, I obviously can't tell what your problem is from here, but mine
>>    did
>>
>>    that for a while. When I tapped on the glass sometimes it would
>> start
>>
>>    working again, sometimes it wouldn't.  Then it stopped and has been
>>    normal
>>
>>    for a while. I think it's obviously the gauge.
>>
>>
>>    Richard
>>
>>    Austin, TX
>>
>>
>>    Sent from my iPhone
>>
>>
>>    On Aug 31, 2016, at 19:26, Mike Thomas <[11]mbefthomas at comcast.net>
>>    wrote:
>>
>>    I'm trying to figure out why I'm getting a pegged reading on my oil
>>
>>    pressure gauge.  It will show normal pressure as the car starts, but
>>
>>    soon after pegs to the right and stays there.  Everything runs fine
>>
>>    otherwise.  I've swapped out the pressure sender, NAPA OP6091, and
>>
>>    it's still pegging, so I'm suspecting the gauge.  Anything else I
>> could
>>
>>    check?
>>
>>    Thanks
>>
>>    Mike Thomas
>>
>>    Pres., Panteras Northwest
>>
>>    Yellow '74 #6328
>>
>>    _______________________________________________
>>
>>    Detomaso Email List is not managed by POCA Posted emails must not
>>
>>    exceed 1.5 Megabytes DeTomaso mailing list
>>
>>    [12]DeTomaso at server.detomasolist.com
>>
>>    [13]http://server.detomasolist.com/mailman/listinfo/detomaso
>>
>>    To manage your subscription (change email address, unsubscribe, etc.)
>>    use
>>
>>    the links above.
>>
>>    Members who post to this list grant license to the list to forward
>> any
>>
>>    message posted here to all past, current, or future members of the
>>    list.
>>
>>    They also grant the list owner permission to maintain an archive or
>>    approve
>>
>>    the archiving of list messages.
>>
>> References
>>
>>    1. mailto:mbefthomas at comcast.net
>>    2. mailto:richard at richardgreenblum.com
>>    3. mailto:mbefthomas at comcast.net
>>    4. mailto:mbefthomas at comcast.net
>>    5. mailto:Richard at richardgreenblum.com
>>    6. mailto:mbefthomas at comcast.net
>>    7. mailto:mbefthomas at comcast.net
>>    8. mailto:richard at richardgreenblum.com
>>    9. mailto:richard at richardgreenblum.com
>>   10. mailto:mbefthomas at comcast.net
>>   11. mailto:mbefthomas at comcast.net
>>   12. mailto:DeTomaso at server.detomasolist.com
>>   13. http://server.detomasolist.com/mailman/listinfo/detomaso
>> _______________________________________________
>>
>>
>> Detomaso Email List is not managed by POCA Posted emails must not
>> exceed 1.5 Megabytes DeTomaso mailing list
>> DeTomaso at server.detomasolist.com
>> http://server.detomasolist.com/mailman/listinfo/detomaso
>>
>> To manage your subscription (change email address, unsubscribe, etc.) use
> the links above.
>> Members who post to this list grant license to the list to forward any
> message posted here to all past, current, or future members of the list.
> They also grant the list owner permission to maintain an archive or approve
> the archiving of list messages.
> _______________________________________________
>
>
> Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5
> Megabytes DeTomaso mailing list DeTomaso at server.detomasolist.com
> http://server.detomasolist.com/mailman/listinfo/detomaso
>
> To manage your subscription (change email address, unsubscribe, etc.) use
> the links above.
>
> Members who post to this list grant license to the list to forward any
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> They also grant the list owner permission to maintain an archive or approve
> the archiving of list messages.
>
>
> _______________________________________________
>
>
> Detomaso Email List is not managed by POCA
> Posted emails must not exceed 1.5 Megabytes
> DeTomaso mailing list
> DeTomaso at server.detomasolist.com
> http://server.detomasolist.com/mailman/listinfo/detomaso
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-- 
Dave Londry
Embedded Spaces Inc. (ESI)
davel at emspace.com

904 429 1937 (SkypeCall FLA)
Skype:embeddedspaces
Canada Numbers
604 721 2278 (cell)
604 589 9182 (shop line)
604 589 9183 (home line)

-------------- next part --------------
   Pricey but here's 75 Ohm

   [1]http://www.digikey.com/product-detail/en/ohmite/RES75RE/RES75RE-ND/8
   24049

   $43 + $9 shipping.

   dave

   On 2016-09-04 6:11 AM, Joseph F. Byrd, Jr. wrote:

Instead of grounding, use a $5 rheostat from Radio Shack.  At full ohms, the
gauge should indicate mid scale (35psig) and smoothly go to full scale as
you turn rheostat to ground.

This was the only suitable rheostat my search of RS found, finding a 75 ohms
would let you test the gauge over its full range

Joe

-----Original Message-----
From: DeTomaso [[2]mailto:detomaso-bounces at server.detomasolist.com] On Behalf
Of Mike Drew via DeTomaso
Sent: Saturday, September 03, 2016 17:44 PM
To: Mike Thomas
Cc: Pantera Mail List
Subject: Re: [DeTomaso] Oil Pressure Gauge Part Deux - Mechanical Gauge Test

Sorry sent too soon.

As I was saying, with the wire not connected the gauge should read zero.
Does it?  If so, with the key on and the end of the wire grounded to the
engine, does it max out the gauge? I think that would be the correct set of
readings (somebody with electrical smarts correct me if I am wrong)

Assuming I am right, that the gauge should read max if the key is on and the
end of the wire is grounded, then if it is not deliberately grounded but
still reads max, that suggests a shirt in that wire I.e. it is cut somewhere
and grounding out against metal.

Just a guess...

At least you know you can drive the car as-is until you come up with a
solution?

Mike

Sent from my iPhone

On Sep 3, 2016, at 14:03, "Mike Thomas" [3]<mbefthomas at comcast.net> wrote:


  Received the mechanical gauge from Mike Drew today (thanks Mike).  Put
  it on and started the motor, and it reads 60 lbs. at start and warm up
  at 1500 RPM's,  not much less at idle (~900 when the choke lets go(,
  and only a little more when I rev.  That doesn't seem right.  I would
  expect it to drop pretty low at idle.


  Thoughts?


  Mike Thomas


  From: Richard Greenblum [[4]mailto:richard at richardgreenblum.com]

  Sent: Friday, September 02, 2016 7:19 PM
  To: Mike Thomas [5]<mbefthomas at comcast.net>
  Subject: Re: [DeTomaso] Oil Pressure Gauge


  Thanks Mike, I'm going to look him up.
  Sent from my iPhone

  On Sep 2, 2016, at 18:43, Mike Thomas [6]<[1]mbefthomas at comcast.net>
  wrote:

  Rick Sanchez


  From: Richard Greenblum [[2][7]mailto:richard at richardgreenblum.com]
  Sent: Thursday, September 01, 2016 5:53 PM
  To: Mike Thomas [8]<[3]mbefthomas at comcast.net>
  Subject: Re: [DeTomaso] Oil Pressure Gauge


  Know it well, the zip code is 78154. It's right outside San Antonio and
  next to Randolph AFB, where I was stationed for most of my Air Force
  Reserve career. About 60 miles from my house in Austin. I'm sure
  Michael Frazier knows him.
  Sent from my iPhone

  On Sep 1, 2016, at 19:38, Mike Thomas [9]<[4]mbefthomas at comcast.net>
  wrote:

  Actually in a town called Schertz, not sure how close that is to you.
  Zip is 87154.

  Mike


  From: Richard Greenblum [[5][10]mailto:Richard at richardgreenblum.com]
  Sent: Thursday, September 01, 2016 7:41 AM
  To: Mike Thomas [11]<[6]mbefthomas at comcast.net>
  Subject: Re: [DeTomaso] Oil Pressure Gauge


  That wasn't me, Mike.  If there's another Richard in Austin with a
  Pantera, I'd like to meet him!


  Did you attend the Rally two years ago put on by Space City Panteras?



  From: Mike Thomas [12]<[7]mbefthomas at comcast.net>
  Date: Wednesday, August 31, 2016 at 22:17
  To: Richard Greenblum [13]<[8]richard at richardgreenblum.com>
  Subject: RE: [DeTomaso] Oil Pressure Gauge


  Thanks Richard

  Are you the same Richard in Texas who just bought my firewall cover?

  Mike


  -----Original Message-----

  From: Richard Greenblum [[9][14]mailto:richard at richardgreenblum.com]

  Sent: Wednesday, August 31, 2016 6:13 PM

  To: Mike Thomas [15]<[10]mbefthomas at comcast.net>

  Subject: Re: [DeTomaso] Oil Pressure Gauge


  Mike, I obviously can't tell what your problem is from here, but mine
  did

  that for a while. When I tapped on the glass sometimes it would
start

  working again, sometimes it wouldn't.  Then it stopped and has been
  normal

  for a while. I think it's obviously the gauge.


  Richard

  Austin, TX


  Sent from my iPhone


  On Aug 31, 2016, at 19:26, Mike Thomas [16]<[11]mbefthomas at comcast.net>
  wrote:

  I'm trying to figure out why I'm getting a pegged reading on my oil

  pressure gauge.  It will show normal pressure as the car starts, but

  soon after pegs to the right and stays there.  Everything runs fine

  otherwise.  I've swapped out the pressure sender, NAPA OP6091, and

  it's still pegging, so I'm suspecting the gauge.  Anything else I
could

  check?

  Thanks

  Mike Thomas

  Pres., Panteras Northwest

  Yellow '74 #6328

  _______________________________________________

  Detomaso Email List is not managed by POCA Posted emails must not

  exceed 1.5 Megabytes DeTomaso mailing list

  [[17]12]DeTomaso at server.detomasolist.com

  [13][18]http://server.detomasolist.com/mailman/listinfo/detomaso

  To manage your subscription (change email address, unsubscribe, etc.)
  use

  the links above.

  Members who post to this list grant license to the list to forward
any

  message posted here to all past, current, or future members of the
  list.

  They also grant the list owner permission to maintain an archive or
  approve

  the archiving of list messages.

References

  1. [19]mailto:mbefthomas at comcast.net
  2. [20]mailto:richard at richardgreenblum.com
  3. [21]mailto:mbefthomas at comcast.net
  4. [22]mailto:mbefthomas at comcast.net
  5. [23]mailto:Richard at richardgreenblum.com
  6. [24]mailto:mbefthomas at comcast.net
  7. [25]mailto:mbefthomas at comcast.net
  8. [26]mailto:richard at richardgreenblum.com
  9. [27]mailto:richard at richardgreenblum.com
 10. [28]mailto:mbefthomas at comcast.net
 11. [29]mailto:mbefthomas at comcast.net
 12. [30]mailto:DeTomaso at server.detomasolist.com
 13. [31]http://server.detomasolist.com/mailman/listinfo/detomaso
_______________________________________________


Detomaso Email List is not managed by POCA Posted emails must not
exceed 1.5 Megabytes DeTomaso mailing list
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To manage your subscription (change email address, unsubscribe, etc.) use

the links above.

Members who post to this list grant license to the list to forward any

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They also grant the list owner permission to maintain an archive or approve
the archiving of list messages.
_______________________________________________


Detomaso Email List is not managed by POCA Posted emails must not exceed 1.5
Megabytes DeTomaso mailing list [34]DeTomaso at server.detomasolist.com
[35]http://server.detomasolist.com/mailman/listinfo/detomaso

To manage your subscription (change email address, unsubscribe, etc.) use
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Members who post to this list grant license to the list to forward any
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They also grant the list owner permission to maintain an archive or approve
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_______________________________________________


Detomaso Email List is not managed by POCA
Posted emails must not exceed 1.5 Megabytes
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To manage your subscription (change email address, unsubscribe, etc.) use the li
nks above.

Members who post to this list grant license to the list to forward any message p
osted here to all past, current, or future members of the list. They also grant
the list owner permission to maintain an archive or approve the archiving of lis
t messages.

--
Dave Londry
Embedded Spaces Inc. (ESI)
[38]davel at emspace.com

904 429 1937 (SkypeCall FLA)
[39]Skype:embeddedspaces
Canada Numbers
604 721 2278 (cell)
604 589 9182 (shop line)
604 589 9183 (home line)

References

   1. http://www.digikey.com/product-detail/en/ohmite/RES75RE/RES75RE-ND/824049
   2. mailto:detomaso-bounces at server.detomasolist.com
   3. mailto:mbefthomas at comcast.net
   4. mailto:richard at richardgreenblum.com
   5. mailto:mbefthomas at comcast.net
   6. mailto:[1]mbefthomas at comcast.net
   7. mailto:richard at richardgreenblum.com
   8. mailto:[3]mbefthomas at comcast.net
   9. mailto:[4]mbefthomas at comcast.net
  10. mailto:Richard at richardgreenblum.com
  11. mailto:[6]mbefthomas at comcast.net
  12. mailto:[7]mbefthomas at comcast.net
  13. mailto:[8]richard at richardgreenblum.com
  14. mailto:richard at richardgreenblum.com
  15. mailto:[10]mbefthomas at comcast.net
  16. mailto:[11]mbefthomas at comcast.net
  17. mailto:12]DeTomaso at server.detomasolist.com
  18. http://server.detomasolist.com/mailman/listinfo/detomaso
  19. mailto:mbefthomas at comcast.net
  20. mailto:richard at richardgreenblum.com
  21. mailto:mbefthomas at comcast.net
  22. mailto:mbefthomas at comcast.net
  23. mailto:Richard at richardgreenblum.com
  24. mailto:mbefthomas at comcast.net
  25. mailto:mbefthomas at comcast.net
  26. mailto:richard at richardgreenblum.com
  27. mailto:richard at richardgreenblum.com
  28. mailto:mbefthomas at comcast.net
  29. mailto:mbefthomas at comcast.net
  30. mailto:DeTomaso at server.detomasolist.com
  31. http://server.detomasolist.com/mailman/listinfo/detomaso
  32. mailto:DeTomaso at server.detomasolist.com
  33. http://server.detomasolist.com/mailman/listinfo/detomaso
  34. mailto:DeTomaso at server.detomasolist.com
  35. http://server.detomasolist.com/mailman/listinfo/detomaso
  36. mailto:DeTomaso at server.detomasolist.com
  37. http://server.detomasolist.com/mailman/listinfo/detomaso
  38. mailto:davel at emspace.com
  39. Skype:embeddedspaces


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