MS3 EGT settings problem. Can't use a value less then -40 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 03-20-2013, 07:12 PM   #1
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Default MS3 EGT settings problem. Can't use a value less then -40

I'm running a digital analog faced AEM EGT gauge (30-5131). My problem is AEM thought it would be cool to make 0.5v = 0 degrees F and 4.5v = 1800 degrees F. That gives a formula of 450 * V - 225 = EGT Temp. Well at 0.0v that gives a value of -225. Tunerstudio won't let me input a value under -40. Is there work around for this or am I screwed? In the mean time I'm using a generic sensor input, which lets me input -225, to be able to log EGT but would like to use the built in safety system if I could.

HELP!
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Old 03-20-2013, 08:44 PM   #2
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post on msextra, see if ken or james can make you a new firmware to fix.
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Old 03-20-2013, 11:01 PM   #3
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That was my next stop. I like asking you guys better.
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Old 03-21-2013, 03:13 AM   #4
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Edit the .ini file to allow inputing -255.
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Old 03-22-2013, 12:48 PM   #5
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Quote:
Originally Posted by Sokool View Post
I'm running a digital analog faced AEM EGT gauge (30-5131). My problem is AEM thought it would be cool to make 0.5v = 0 degrees F and 4.5v = 1800 degrees F. That gives a formula of 450 * V - 225 = EGT Temp. Well at 0.0v that gives a value of -225. Tunerstudio won't let me input a value under -40. Is there work around for this or am I screwed? In the mean time I'm using a generic sensor input, which lets me input -225, to be able to log EGT but would like to use the built in safety system if I could.

HELP!
I didn't check your math, but since the output is linear, why not calculate the -40 value?

450V -225 = -40
450V = 185
V = .41
-40 = .41v
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Old 03-22-2013, 01:03 PM   #6
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but doesn't the MS3 software specifically ask for the 0v value, so what he's saying is that 0v = -255F

if 0.5v=0F and 4.5v = 1800F

it's not asking for the voltage at -40F...
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Old 03-22-2013, 05:27 PM   #7
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Brain is correct...
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Old 03-24-2013, 02:55 PM   #8
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I decided to update to 1.2.1 today and before I assigned the .ini I went ahead and fixed the egtcal_temp0 from -40 to -255. Works like a charm!
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Old 03-24-2013, 03:01 PM   #9
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Yay!
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Old 03-24-2013, 04:16 PM   #10
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Spoke too soon... It lets me put in a value of -225 now but now it constantly shows EGT as -100. Switch back to using generic inputs and it will display fine.... What went wrong? Added my .msq for gigs.
Attached Files
File Type: msq 1-2-1Firstload.msq (181.0 KB, 157 views)
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