[DeTomaso] Oil Temperatures

[jderyke at aol.com]

The easy way- drilling the main bearing webs- may weaken the block on high-horse applications. Maybe there are film sensors that could go under bearing inserts? They got significant temps from cam bearing sensors, too. Sadly, I can no longer find that oil company article on-line. Cheers- JD
 

 

 

-----Original Message-----
From: Joseph F. Byrd, Jr. <byrdjf at embarqmail.com>
To: jderyke <jderyke at aol.com>; detomaso <detomaso at server.detomasolist.com>
Sent: Wed, Jun 22, 2016 1:13 pm
Subject: RE: [DeTomaso] Oil Temperatures

Interesting thought I had...

For the heavy rotating equipment I use to work on, even thought their bearing babbitt melted at 400F, if the bearing metal got hotter than 275F was considered a failure from going plastic from the heat and deforming with the weight.  The bearing metal was hotter than the oil drain temperature.

I wonder how hard it would be to install crankshaft bearing metal TCs?

JFByrd

-----Original Message-----
From: DeTomaso [mailto:detomaso-bounces at server.detomasolist.com] On Behalf Of Jack DeRyke via DeTomaso
Sent: Wednesday, June 22, 2016 14:35 PM
To: steve at snclocks.com; demongusta at gmail.com
Cc: detomaso at server.detomasolist.com
Subject: Re: [DeTomaso] Oil Temperatures

FWIW, I ran across an article written by a major oil company some years ago. They had fully instrumented a modified 350 engine on a dyno, and found that the oil IN THE MAIN BEARINGS ran an average of 20F HOTTER than what was shown by pan sensor.s So 275F pan temp may mean nearly 300F in the bearings! This is in the 'char' temp range for regular oil, and even with synthetics, it means the oil is so badly thinned out as to vastly reduce its load carrying capacity. In this test, pan temps were the coolest oil temps found while main bearing temps were highest
....
J DeRyke


-------------- next part --------------
   The easy way- drilling the main bearing webs- may weaken the block on
   high-horse applications. Maybe there are film sensors that could go
   under bearing inserts? They got significant temps from cam bearing
   sensors, too. Sadly, I can no longer find that oil company article
   on-line. Cheers- JD

   -----Original Message-----
   From: Joseph F. Byrd, Jr. <byrdjf at embarqmail.com>
   To: jderyke <jderyke at aol.com>; detomaso
   <detomaso at server.detomasolist.com>
   Sent: Wed, Jun 22, 2016 1:13 pm
   Subject: RE: [DeTomaso] Oil Temperatures
   Interesting thought I had...
   For the heavy rotating equipment I use to work on, even thought their
   bearing babbitt melted at 400F, if the bearing metal got hotter than
   275F was considered a failure from going plastic from the heat and
   deforming with the weight. The bearing metal was hotter than the oil
   drain temperature.
   I wonder how hard it would be to install crankshaft bearing metal TCs?
   JFByrd
   -----Original Message-----
   From: DeTomaso [[1]mailto:detomaso-bounces at server.detomasolist.com] On
   Behalf Of Jack DeRyke via DeTomaso
   Sent: Wednesday, June 22, 2016 14:35 PM
   To: [2]steve at snclocks.com; [3]demongusta at gmail.com
   Cc: [4]detomaso at server.detomasolist.com
   Subject: Re: [DeTomaso] Oil Temperatures
   FWIW, I ran across an article written by a major oil company some years
   ago. They had fully instrumented a modified 350 engine on a dyno, and
   found that the oil IN THE MAIN BEARINGS ran an average of 20F HOTTER
   than what was shown by pan sensor.s So 275F pan temp may mean nearly
   300F in the bearings! This is in the 'char' temp range for regular oil,
   and even with synthetics, it means the oil is so badly thinned out as
   to vastly reduce its load carrying capacity. In this test, pan temps
   were the coolest oil temps found while main bearing temps were highest
   ....
   J DeRyke

References

   1. mailto:detomaso-bounces at server.detomasolist.com?
   2. mailto:steve at snclocks.com
   3. mailto:demongusta at gmail.com
   4. mailto:detomaso at server.detomasolist.com