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

Go Back  Miata Turbo Forum - Boost cars, acquire cats. > Performance & Tuning > ECUs and Tuning > MEGAsquirt
Reload this Page >

Prosport gauge readings different than oem CLT in tunerstudio

MEGAsquirt A place to collectively sort out this megasquirt gizmo
Sponsored by:
Sponsored by:

Prosport gauge readings different than oem CLT in tunerstudio

Old 04-05-2015, 12:18 AM
  #1  
Junior Member
Thread Starter
 
Join Date: Apr 2011
Location: vancouver, bc
Posts: 116
Total Cats: 4
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  
Old 04-05-2015, 12:50 AM
  #2  
Junior Member
Thread Starter
 
Join Date: Apr 2011
Location: vancouver, bc
Posts: 116
Total Cats: 4
Default

I have attached my tune hoepfully someone can give me some advice. thanks.
Attached Files
File Type: msq
CurrentTune.msq (177.8 KB, 33 views)
rikaro is offline  
Old 04-05-2015, 03:20 AM
  #3  
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,999
Total Cats: 1,814
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)
__________________
Trackspeed Engineering
High-Performance Turbo Specialists - Sunnyvale, CA - 650-701-7223 - Email us!
Originally Posted by codrus View Post
Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
Savington is offline  
Old 04-05-2015, 04:31 AM
  #4  
Junior Member
Thread Starter
 
Join Date: Apr 2011
Location: vancouver, bc
Posts: 116
Total Cats: 4
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  
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: 18,445
Total Cats: 1,618
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  
Old 04-05-2015, 12:58 PM
  #6  
Supporting Vendor
iTrader: (1)
 
Join Date: May 2010
Location: San Diego
Posts: 509
Total Cats: 52
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  
Old 04-05-2015, 07:32 PM
  #7  
Junior Member
Thread Starter
 
Join Date: Apr 2011
Location: vancouver, bc
Posts: 116
Total Cats: 4
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  
Old 04-05-2015, 07:40 PM
  #8  
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago. (The non-murder part.)
Posts: 28,063
Total Cats: 2,484
Default

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  
Old 04-12-2015, 01:53 AM
  #9  
Junior Member
Thread Starter
 
Join Date: Apr 2011
Location: vancouver, bc
Posts: 116
Total Cats: 4
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  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Full_Tilt_Boogie
Build Threads
63
08-09-2018 07:54 PM
stoves
Suspension, Brakes, Drivetrain
5
04-21-2016 04:00 PM
itsMikey
MSPNP
3
09-28-2015 07:40 AM


Thread Tools
Search this Thread
Quick Reply: Prosport gauge readings different than oem CLT in tunerstudio


Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

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.