Notices
Series I Tech Garage The place to discuss anything technical about the RX-8 that doesn't fit into any of the categories below.

Oil cooling brainstorm

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 09-30-2006, 03:07 PM
  #76  
Administrator
 
zoom44's Avatar
 
Join Date: Jul 2002
Location: portland oregon
Posts: 21,958
Received 115 Likes on 88 Posts
and they are in georgia
Old 09-30-2006, 06:51 PM
  #77  
Registered
iTrader: (1)
 
r0tor's Avatar
 
Join Date: May 2003
Location: PA
Posts: 3,754
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by MazdaManiac
I was just skimming, but I needed to correct this point.

The thermostat is a 180°F unit, which actually means it is wide open at 180°F and starts to open at 156°F.
It isn't an on/off switch for the coolant.
Furthermore, there is a thermostat bypass that allows some coolant flow, regardless of the thermostat position.
i beg to differ... unless this part of the service manual is also screwed up
Attached Thumbnails Oil cooling brainstorm-coolant.jpg  
Old 10-01-2006, 05:02 AM
  #78  
Banned
iTrader: (3)
 
MazdaManiac's Avatar
 
Join Date: Oct 2003
Location: Under my car
Posts: 16,386
Likes: 0
Received 24 Likes on 21 Posts
The spec I got from the ESDI last looked like this:



Maybe they upped the opening temp (or lowered it, depending on which manual is older).

In either case, your statement about 180°F being completely closed is still wrong.
Attached Thumbnails Oil cooling brainstorm-clipboard01.jpg  
Old 10-01-2006, 01:27 PM
  #79  
Registered User
 
Renesis_8's Avatar
 
Join Date: Oct 2005
Location: Toronto, Canada
Posts: 2,047
Likes: 0
Received 0 Likes on 0 Posts
In response to the oil/water cooler, the Courage C65 car didnt even finish, according to another post in another thread, it had fluids in the pit, anyone know what happened to it?

Sorry I did not read all 6 pages of the thread, but my guess is they'd need a Huge *** radiator to handle the extra heat from the oil getting into the water, and I dont really think there is room for a bigger radiator or even running one on both sides of the car wouldnt handle the demand either.

Does anyone if the C65 overheated or it was some other mechanical problems.
________
Agnelle

Last edited by Renesis_8; 09-11-2011 at 09:20 AM.
Old 10-01-2006, 01:29 PM
  #80  
Registered User
 
Renesis_8's Avatar
 
Join Date: Oct 2005
Location: Toronto, Canada
Posts: 2,047
Likes: 0
Received 0 Likes on 0 Posts
At 8:01 pm (8h 15m running), Elliott Forbes-Robinson (#8-P2 Courage C65 Mazda) into the pits. Fuel only, no driver change. No coolant pressure, going behind the wall.

This is what I found on ALMS website, pit notes
________
Park Royal 1 Pattaya

Last edited by Renesis_8; 09-11-2011 at 09:20 AM.
Old 10-01-2006, 01:41 PM
  #81  
Registered
Thread Starter
 
rotarygod's Avatar
 
Join Date: Apr 2003
Location: Houston
Posts: 9,134
Likes: 0
Received 22 Likes on 21 Posts
They have 2 radiators.
Old 10-01-2006, 03:32 PM
  #82  
Registered
 
machfive's Avatar
 
Join Date: Jul 2006
Location: New Orleans, LA - formerly El Segundo, CA
Posts: 192
Likes: 0
Received 0 Likes on 0 Posts
oil cooling brainstorm

Hey rotorygod,

You solution of using the engine coolant to cool the oil is a good idea that is already widely used in the motorcycle industry. My 2002 Honda CBR954rr runs a coolant line from the engine around the base of the oil filter to keep the oil temperature in check. Problem solved and there is no need for a separate oil cooler.
Old 10-02-2006, 09:14 AM
  #83  
Registered
iTrader: (3)
 
olddragger's Avatar
 
Join Date: Apr 2004
Location: macon, georgia
Posts: 10,828
Likes: 0
Received 38 Likes on 27 Posts
Just got through with a track weekend At Roebling(in Savanna Ga) ambients were mid to high eighty's. Oil temps never went over 220. Coolant temps never over 210(most of the time around 190-200.(THAT WAS A SURPRISE). I have removed all protective screens from in front of the a/c and oil coolers. Running 5W30 RP--agency power pully(little underdrive). i was running lap times of 1:29's(?) 1:30---1:32 most of the time.
Earier this year with ambient temp at the same track of 100F--oil temps 230F--coolant temp 210--alll the time.
To me it seems that once ambient temps get to above mid ninety's the cooling systems start getting a little stressed. No problems with the above temps--but on the street with less airflow(i hope) redlight-to redlight--no gauges--5w/20 oil = problems. So whats new --right?
OD
Old 10-02-2006, 02:20 PM
  #84  
Banned
iTrader: (3)
 
MazdaManiac's Avatar
 
Join Date: Oct 2003
Location: Under my car
Posts: 16,386
Likes: 0
Received 24 Likes on 21 Posts
I find that the my water temps go up one degree celcius for each degree fahrenheit above 92° ambient under load.

i.e. - If my coolant temp is 92°C (196°F) at 92°F, if the ambient goes to 94°F, my coolant goes to 94°C (201°F).
Odd, but repeatable.

This also means that 110°F should really be the end of the line for me when driving the car hard. I wish I had thought about that during that 117°F mountain climb a few weeks ago...
Old 04-23-2008, 09:54 PM
  #85  
Registered User
iTrader: (1)
 
rx8dorifto's Avatar
 
Join Date: Nov 2006
Posts: 220
Likes: 0
Received 0 Likes on 0 Posts
oil cooler thermostat

Please enlighten me about this:

The oil cooling in our 8 has a thermostat which will kick in on certain temperature to flow the oil to the oil cooler right?
So, when we do oil change when engine is cold, we need not flush the oil which remain in oil cooler?

If I installed an aftermarket universal oil cooler using the sandwitch adaptor, it won't be control by the oil cooler thermostat and the oil is always flowing through to my aftermarket oil cooler? Does this setup actually better or worse?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
RevMeHarder
New Member Forum
6
08-16-2023 06:23 PM
WranglerFan
New Member Forum
4
05-31-2022 07:51 AM
Carbon8
RX-8's For Sale/Wanted
42
02-27-2020 08:39 AM
Slack
New Member Forum
6
09-05-2015 06:42 PM
Cookingislife1226
New Member Forum
2
09-05-2015 03:38 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Oil cooling brainstorm



All times are GMT -5. The time now is 08:44 PM.