Prosport gauge readings different than oem CLT in tunerstudio - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


MEGAsquirt A place to collectively sort out this megasquirt gizmo

Reply
 
 
 
LinkBack Thread Tools
Old 04-05-2015, 12:18 AM   #1
Junior Member
Thread Starter
 
Join Date: Apr 2011
Location: vancouver, bc
Posts: 115
Total Cats: 3
Default Prosport gauge readings different than oem CLT in tunerstudio

So I'm here trying to ask the same question again. Any help would be great.

Earlier I sent my Prosport gauge because it was reading 15 degrees high. Prosport themselves claimed that their sensors was working fine but sent me a new set. However I tested the new set and it was reading a different resistance value (68F at 1220 ohms). Installed it back in the car but it still isn't matching my tunerstudio values. The Prosport gauge is mounted in the upper hose.

CLT values:
14F 9250
71.6F 2320
176F 330
biased resistor 2490

Using GM iat sensor
-40F 100700
86F 2238
210.2F 177
biased resistor 2490

This stuff is pulling my hair and the noobness of me can't figure out why. I'm running Bp6d vvt swap into 95 miata with I/H/E and flywheel. I got a friend to do the project but ended left me hanging.

Last edited by rikaro; 04-05-2015 at 01:16 AM.
rikaro is offline   Reply With Quote
Old 04-05-2015, 12:50 AM   #2
Junior Member
Thread Starter
 
Join Date: Apr 2011
Location: vancouver, bc
Posts: 115
Total Cats: 3
Default

I have attached my tune hoepfully someone can give me some advice. thanks.
Attached Files
File Type: msq CurrentTune.msq (177.8 KB, 27 views)
rikaro is offline   Reply With Quote
Old 04-05-2015, 03:20 AM   #3
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,367
Total Cats: 1,331
Default

Put it in a pot of water along with a known good temperature gauge (digital meat thermometer or similar). Take three readings on the way to boiling, then do your OEM sensor too. Use the data to figure out who's right and who's wrong.

(Here's a hint: The Prosport gauge is wrong)
Savington is offline   Reply With Quote
Old 04-05-2015, 04:31 AM   #4
Junior Member
Thread Starter
 
Join Date: Apr 2011
Location: vancouver, bc
Posts: 115
Total Cats: 3
Default

thanks I'll try that out. Would taking the rad cap off and getting a reading from there be accurate at all? Should I even try it or don't bother?

Also when I get all the datas in ohms, should all of the resistance numbers read the same? Or do they vary differently from other manufactures?
rikaro is offline   Reply With Quote
Old 04-05-2015, 11:35 AM   #5
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,999
Total Cats: 1,466
Default

My gauge is wrong too. I trust the ecu gauge more so I plan to add a resistor somewhere to make my external gauge correct again.
aidandj is offline   Reply With Quote
Old 04-05-2015, 12:58 PM   #6
Supporting Vendor
iTrader: (1)
 
Join Date: May 2010
Location: San Diego
Posts: 491
Total Cats: 39
Default

Don't waste your time with those gauges, AccuTech gauges are relatively cheap and are extremely accurate in my experience. These are available from a number of vendors on here.

AccuTech? Stepper Motor Gauges
Lincoln Logs is offline   Reply With Quote
Old 04-05-2015, 07:32 PM   #7
Junior Member
Thread Starter
 
Join Date: Apr 2011
Location: vancouver, bc
Posts: 115
Total Cats: 3
Default

So I've tested it with a thermometer beside it. Poured hot water and wait for it to settle. My thermometer is reading 105f while the gauge reads close to 130f. Found my answer thanks!
rikaro is offline   Reply With Quote
Old 04-05-2015, 07:40 PM   #8
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Delicious and Moist.
Posts: 26,326
Total Cats: 1,926
Default

Quote:
Originally Posted by rikaro View Post
Also when I get all the datas in ohms, should all of the resistance numbers read the same? Or do they vary differently from other manufactures?
They will typically differ.

There are several different standards for the calibration of value to voltage in automotive-style temperature and pressure sensors, so it's not reasonable to expect sensors from two different manufacturers to yield the same resistance value at the same temperature. This is why Megasquirt has the sensor calibration function in the first place.
Joe Perez is offline   Reply With Quote
Old 04-12-2015, 01:53 AM   #9
Junior Member
Thread Starter
 
Join Date: Apr 2011
Location: vancouver, bc
Posts: 115
Total Cats: 3
Default

Update. I a hoping someone can solve this with me.

I tested the prosport again the other day and wired the to power straight to the battery and my gauges are a lot more accurate than previously wired to the radio.

Do any of you guys have this issue? Could it be that my ground or wiring not getting the amperage delivered to these gauages?
rikaro is offline   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 Yesterday 09:00 PM
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
why is my car running like pewp? (tune/datalog) itsMikey MSPNP 3 09-28-2015 07:40 AM


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 07:32 AM.