High oil temps - RX7Club.com - Mazda RX7 Forum

Engine Management Forum Use this area for discussing Haltech, Wolf 3D, Power FC, AEM and any other aftermarket ECU upgrades. Help/Questions/Tuning

High oil temps

Reply

 
 
 
Old 11-10-18, 02:28 PM
  #1  
Senior Member
Thread Starter
 
Join Date: Mar 2004
Location: Pensacola FL
Posts: 569
Thanked 0 Times in 0 Posts
High oil temps

This might seem like a weird/dumb questuon for the ECU section as it's oil temps. Here's the thing. Around town driving my oil temps will be at like 190-200f water at 180
i hit the highway and cruise, which for me is 4k+ rpm and my oil temps climb considerably, waters stays about the same.

I have a permacool 10 pass cooler so cooling hardware is good. I could duct the cooler itself but I wondered if any tuning scenarios could be dumping more heat into the oil system?
mikey D is offline  
Reply With Quote
Old 11-10-18, 02:29 PM
  #2  
Senior Member
Thread Starter
 
Join Date: Mar 2004
Location: Pensacola FL
Posts: 569
Thanked 0 Times in 0 Posts
Oh, .I've been meaning to test the gauge sensor to see if it's accurate. I'll do that this weekend. Would be funny if that's all it was.
mikey D is offline  
Reply With Quote
Old 11-10-18, 02:38 PM
  #3  
Automotive Designer
 
RGHTBrainDesign's Avatar
 
Join Date: Aug 2012
Location: San Jose, CA
Posts: 1,362
Thanked 31 Times in 30 Posts
Originally Posted by mikey D View Post
This might seem like a weird/dumb questuon for the ECU section as it's oil temps. Here's the thing. Around town driving my oil temps will be at like 190-200f water at 180
i hit the highway and cruise, which for me is 4k+ rpm and my oil temps climb considerably, waters stays about the same.

I have a permacool 10 pass cooler so cooling hardware is good. I could duct the cooler itself but I wondered if any tuning scenarios could be dumping more heat into the oil system?
10 Row?

That's TINY! OEM application is FAR bigger than that and if you're pushing anything over OEM power, I'd suspect you're running into a LOT of oil coking issues.

I'd suggest looking into the new Derale products if space is a constraint. Derale 65860 Oil Cooler




RGHTBrainDesign is offline  
Reply With Quote
Old 11-10-18, 02:48 PM
  #4  
Senior Member
Thread Starter
 
Join Date: Mar 2004
Location: Pensacola FL
Posts: 569
Thanked 0 Times in 0 Posts
https://shop.perma-cool.com/515-Serpentine-Competition-Coil-10-Pass-1-2-FPT-500-800-HP-515.htm

Its not really tiny. I have room for another if it's really a problem

Last edited by mikey D; 11-10-18 at 02:52 PM.
mikey D is offline  
Reply With Quote
Old 11-10-18, 03:40 PM
  #5  
Automotive Designer
 
RGHTBrainDesign's Avatar
 
Join Date: Aug 2012
Location: San Jose, CA
Posts: 1,362
Thanked 31 Times in 30 Posts
Originally Posted by mikey D View Post
https://shop.perma-cool.com/515-Serpentine-Competition-Coil-10-Pass-1-2-FPT-500-800-HP-515.htm

Its not really tiny. I have room for another if it's really a problem
That cooling design is incredibly inefficient. It's probably in the 6000-8000 BTU range. The one I linked you was 125000 BTU and fits in a similar footprint.
RGHTBrainDesign is offline  
Reply With Quote
Old 11-10-18, 05:20 PM
  #6  
Senior Member
Thread Starter
 
Join Date: Mar 2004
Location: Pensacola FL
Posts: 569
Thanked 0 Times in 0 Posts
I'm not saying your wrong but why do you say that? Is there any info I can check out? I've no problem with throwing down the cash for a better cooler. I just need info to justify it.
mikey D is offline  
Reply With Quote
Old 11-10-18, 05:38 PM
  #7  
Senior Member
Thread Starter
 
Join Date: Mar 2004
Location: Pensacola FL
Posts: 569
Thanked 0 Times in 0 Posts
Tube fin vs plate style. Guess I get an early Xmas present!

Think the fan is the reason it's so efficient for it's size?

Last edited by mikey D; 11-10-18 at 06:08 PM.
mikey D is offline  
Reply With Quote
Old 11-10-18, 09:28 PM
  #8  
Automotive Designer
 
RGHTBrainDesign's Avatar
 
Join Date: Aug 2012
Location: San Jose, CA
Posts: 1,362
Thanked 31 Times in 30 Posts
Originally Posted by mikey D View Post
Tube fin vs plate style. Guess I get an early Xmas present!

Think the fan is the reason it's so efficient for it's size?
No, the fan has nothing to do with it's BTU/hr efficiency. They've just finally decided to do internal turbulators like intercooler cores on things like oil coolers. It's extremely expensive to extrude this way, but adds so much surface area and mass, it's absolutely worth it. 10x the cooling efficiency on the same footprint. Pretty nuts, right?

If you do end up ordering this exact unit, you're welcome to use my contact there:

Cam Brandt
Technical Support Specialist
[email protected]
(323) 266-3850 ext. 236

Tell him Ryan (mention Rx7 Crazy Fueling Requirements from SEMA) sent you and he'll remember our conversations.

Cheers,
-Ryan
RGHTBrainDesign is offline  
Reply With Quote
Old 11-10-18, 09:58 PM
  #9  
Senior Member
Thread Starter
 
Join Date: Mar 2004
Location: Pensacola FL
Posts: 569
Thanked 0 Times in 0 Posts
Thanks man. Yah turbulators in oilcoolers usded to be squiggly wires in the tubes!
i was looking at setrab because I don't really want to muck withanother fan. For the price though the derale and scewing with another fan is probably worth it.
mikey D is offline  
Reply With Quote
Old 11-11-18, 10:21 AM
  #10  
Senior Member
Thread Starter
 
Join Date: Mar 2004
Location: Pensacola FL
Posts: 569
Thanked 0 Times in 0 Posts
Dumb question about thermostats. When the oil is cold the oil should flow from the front cover to the tstat and back into the engine. It should close off the option to go to the oilcoolers.

Mine is like wide open. When cold the oil can flow anywhere it wants. I don't have a way to see if it closes and functions properly when hot. I wish I would have paid more attention to this stuff when I was younger. Lots of **** I did to this car back then was less than optimal.
mikey D is offline  
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
tek_88
3rd Generation Specific (1993-2002)
2
01-13-16 04:06 PM
Smitter
3rd Generation Specific (1993-2002)
14
08-31-08 11:20 PM
sirshan
West RX-7 Forum
5
06-16-07 11:52 AM
Gene
Race Car Tech
19
07-27-06 10:24 PM
YearsOfDecay
2nd Generation Specific (1986-1992)
5
03-31-05 03:44 PM


Thread Tools
Search this Thread
Quick Reply: High oil temps


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: