My cooling system supersuks!! - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 06-02-2008, 11:41 PM   #1
Junior Member
Thread Starter
iTrader: (5)
 
Join Date: Jan 2006
Posts: 294
Total Cats: 0
Default My cooling system supersuks!!

My coolant temps have been stabilizing at 215 degrees on boosted runs and if just driving around town it stays around 208 degrees. Time for a new gigantic radiator, some larger CFM fans, and a coolant reroute!! The ambient temps here in Hawaii are now around 85 and increasing. Good thing this is my play car.
supersuk is offline   Reply With Quote
Old 06-03-2008, 12:10 AM   #2
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,908
Total Cats: 1,793
Default

what type of MS and install?

it stabilizes at 215* because MS doesn't output higher than that without work-arounds.
Braineack is online now   Reply With Quote
Old 06-03-2008, 12:12 AM   #3
Elite Member
iTrader: (17)
 
Join Date: May 2007
Location: NY
Posts: 1,614
Total Cats: 2
Default

So MS shows max coolant temp as 215??
Didnt mean to threadjack but wanted some clarification so i know what i'm dealing with as well..
TonyV is offline   Reply With Quote
Old 06-03-2008, 12:13 AM   #4
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,908
Total Cats: 1,793
Default

what type of MS and install?

it stabilizes at 215* because MS doesn't output higher than that without work-arounds.
Braineack is online now   Reply With Quote
Old 06-03-2008, 12:52 PM   #5
Junior Member
Thread Starter
iTrader: (5)
 
Join Date: Jan 2006
Posts: 294
Total Cats: 0
Default

I have a MS1 that I built myself. Right now i'm running the High Res 10g code. I did the TPS mod, and will be doing the fan control mod and the EBC mod. What kind of work arounds would I need to have it measure higher values?

So you're telling me that it doesn't go higher than 215? Damn, that means my car might have been overheating!! Well, its a good thing that the OEM water temp gauge never went a little past half way.
supersuk is offline   Reply With Quote
Old 06-03-2008, 01:07 PM   #6
Junior Member
iTrader: (1)
 
Join Date: Jun 2007
Posts: 114
Total Cats: 0
Default

Quote:
Originally Posted by Braineack View Post
what type of MS and install?

it stabilizes at 215* because MS doesn't output higher than that without work-arounds.

He meant without reach arounds.
HKSturboMiata is offline   Reply With Quote
Old 06-03-2008, 01:14 PM   #7
Junior Member
Thread Starter
iTrader: (5)
 
Join Date: Jan 2006
Posts: 294
Total Cats: 0
Default

So what the hell are reach arounds?
supersuk is offline   Reply With Quote
Old 06-03-2008, 01:20 PM   #8
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,908
Total Cats: 1,793
Default

Quote:
Originally Posted by supersuk View Post
So what the hell are reach arounds?
riddle me this first....are you piggyback or standalone? It's possible your easytherm bias and resistance values are simply off.

as far as a reach around, you'll need to see what the water cooled guys at msefi.com are doing. From my mild reading on the subject, since the 8-bit processor can only deal with so much data you have a scale from -40 to 215. What I believe others were doing is making the easytherm scale and manually altering it so the MS can read withing the allocated 255 steps, but on a difference scale. The other is similar. You leave the scale as is (altough really why do we need to read -40F) but you extend the resistance curve above 215, the MS wont do anythign with it, but on your laptop can read it...something like that.
Braineack is online now   Reply With Quote
Old 06-03-2008, 02:04 PM   #9
Junior Member
Thread Starter
iTrader: (5)
 
Join Date: Jan 2006
Posts: 294
Total Cats: 0
Default

Ahh, I see. I'm piggyback right now since I have AC and want it to idle good because of that. I really don't want to mess with the MS because its been working really well the way it is set up.

Hmmm, looks like a new gauge for me. Hopefully I can find an accurate gauge to replace the OEM one in the dash.
supersuk is offline   Reply With Quote
Old 06-03-2008, 02:07 PM   #10
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,908
Total Cats: 1,793
Default

ok now, copy and paste the top section of your matfactor and thermfactor.inc files as generated from easytherm, and should be in your project folder's mtcfg folder after you copied them there....
Braineack is online now   Reply With Quote
Old 06-03-2008, 03:35 PM   #11
Junior Member
Thread Starter
iTrader: (5)
 
Join Date: Jan 2006
Posts: 294
Total Cats: 0
Default

So to make everything clear, you want me to copy and paste into a post so that you can see?

If thats the case, i'll have to do that when I get home later tonight.
supersuk is offline   Reply With Quote
Old 06-03-2008, 03:57 PM   #12
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,908
Total Cats: 1,793
Default

yep. i wanna verify you are using the correct bias and resistance values. i assume you are sharing the ait and clt signals with the ecu.
Braineack is online now   Reply With Quote
Old 06-03-2008, 04:08 PM   #13
Junior Member
Thread Starter
iTrader: (5)
 
Join Date: Jan 2006
Posts: 294
Total Cats: 0
Default

Ok, will do.
supersuk is offline   Reply With Quote
Old 06-03-2008, 05:49 PM   #14
Elite Member
iTrader: (10)
 
IcantDo55's Avatar
 
Join Date: Apr 2007
Location: VA Beach
Posts: 1,772
Total Cats: 18
Default

When you go to your car in the morning check the temperature, then check the IAT and CLT and see if there all the same before you start the car. They should be really close, mine were 40* high on the coolant temps.

Thanks Scott for helping me fix it.
IcantDo55 is offline   Reply With Quote
Old 06-04-2008, 03:27 AM   #15
Junior Member
Thread Starter
iTrader: (5)
 
Join Date: Jan 2006
Posts: 294
Total Cats: 0
Default

Here is the top part of the MATFactor;

; Generated using EasyTherm4.exe,
;
; Air Temp Thermistor Comment Field
;
; File generated for use with stock 2490 ohm resistor at R4
;
; Steinhart-Hart coefficients: A= 1.177757E-03 B=2.77375E-04 C= -2.945618E-07
;
; Input Data: Temp, degF Resistance
; 26 28681
; 106 2238
; 240 177

Here is the top part of the thermfactor;

; Generated using EasyTherm4.exe
;
; Coolant Thermistor Comment Field
;
; File generated for use with stock 2490 ohm resistor at R7
;
; Steinhart-Hart coefficients: A= 1.193449E-03 B=2.837733E-04 C= 6.840434E-09
;
; Input Data Temp, degC Resistance
; -20 16200
; 20 2450
; 80 320
supersuk is offline   Reply With Quote
Old 06-04-2008, 10:15 AM   #16
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,908
Total Cats: 1,793
Default

you need to reflash the MS. Since you are piggyback you are sharing the CLT and AIT signals with the ECU. both the MS and ECU have bias resistors for the signals, when you add two resistors in parallel, the total resistance drops.

Assuming you have both R4 and R7 installed and you are sharing the sensors, you'll want to use these values:

CLT Bias 1280
DegF
-4 16200
68 2450
176 320


AIT Bias 1450
DegF
26 28681
106 2238
240 177


take caution when you flash it, save your map, unplug your coils and ignitor, reflash, then reburn the map, then plug stuff up again. make sure to copy the three generated .inc files to your project folder's mtcfg folder. (ex: .../car1/mtcfg/)



the odd thing here is, technically you should be reading about 30F too cold on the CLT at least.....
Braineack is online now   Reply With Quote
Old 06-04-2008, 03:08 PM   #17
Junior Member
Thread Starter
iTrader: (5)
 
Join Date: Jan 2006
Posts: 294
Total Cats: 0
Default

I don't have R4 and R7 installed because i'm running parallel. I followed your DIY and some other threads a while ago. So If I did this, I don't need to have lower resistance values correct?

Last edited by supersuk; 06-04-2008 at 03:59 PM.
supersuk is offline   Reply With Quote
Old 06-04-2008, 03:11 PM   #18
Junior Member
Thread Starter
iTrader: (5)
 
Join Date: Jan 2006
Posts: 294
Total Cats: 0
Default

I'm gonna try and reflash the MS tonight. Since I'm running the High Resolution Code, do I still choose custom in easytherm or choose the Hi Res option?
supersuk is offline   Reply With Quote
Old 06-04-2008, 04:37 PM   #19
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Delicious and Moist.
Posts: 26,328
Total Cats: 1,926
Default

I always select custom. This way it prompts you for the location of the file, rather than looking in a default location.
Joe Perez is offline   Reply With Quote
Old 06-04-2008, 04:53 PM   #20
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,908
Total Cats: 1,793
Default

Quote:
Originally Posted by supersuk View Post
I don't have R4 and R7 installed because i'm running parallel. I followed your DIY and some other threads a while ago. So If I did this, I don't need to have lower resistance values correct?
i run parallel and have both installed. i use those values and it's spot on.


without r4 and r7 try..2625 for clt and 3472 for AIT.

I know coolant will be correct, so if the car has been sitting, ait should be very close...if not I suck at math.

basically since I know 1450 is correct with R4 (2490), using the formula for parallel resistors.... 2490 and 3472 would equal 1450....



this also makes sense that you are displaying a tad higher CLT than you should....because you have an actual 2625 resistance, but told MS it's only 2490....that would make it output on the high side....but I'd guess only 4-5F
Braineack is online now   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 59 12-15-2017 09:00 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM
Are my coils failing? viriiguy General Miata Chat 5 09-28-2015 08:39 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 12:59 PM.