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MEGAsquirt A place to collectively sort out this megasquirt gizmo

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Old 08-14-2007, 09:57 AM   #41
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cool thanks. might be a fun experiment

http://www.omega.com/ppt/pptsc.asp?r...ERMIS_ELEMENTS
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Old 08-15-2007, 12:01 PM   #42
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Back from the salt...

FYI to all, anytime you see -40 on your temp sensors (IAT or CLT) it's not connected... that's the default temp MegaTune will show for an unconnected sensor. So it's either wiring, or 'could' be a bad sensor though that's pretty rare. Usually wiring...

Glad it's sorted Ben!
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Old 08-15-2007, 12:20 PM   #43
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Found, I'm having issues with only IAT at this point... i've tried another sensor and get similar readings. My wiring is literally to the ecu and to a ground.

Could i be so severely butchering my easytherm stuff.. that it is the issue?
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Old 08-15-2007, 12:49 PM   #44
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Quote:
Originally Posted by Splitime View Post
Hurm... i measure 2.41v for my temp sensor... I also compared the sensor ohm wise to another new sensor.. .and its fine.

I wonder wth is wrong with mine.
probably bias resistance and/or easytherm values.
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Old 08-15-2007, 12:55 PM   #45
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well, i have a 2.2ohm resistor in there, which i put into easytherm. I then use the GM default values and the rx7 clt values... CLT works... but IAT reads super super super low.
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Old 08-15-2007, 01:09 PM   #46
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So you're using GM CLT and IAT sensors? And 2.2ohm resistors for bias on both R4 and R7?

Did you put the .inc files in the proper folder in MegaTune after Easytherm generated them?

airdenfactor.inc
matfactor.inc
thermfactor.inc

All three need to go in:

C:\Program Files\MegaSquirt\car1\mtCfg

or the mtcfg subdir under whatever project folder you're using... I used car1 in this example as it's the default.
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Old 08-15-2007, 01:17 PM   #47
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Back from the salt...
250mph ?
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Old 08-15-2007, 01:20 PM   #48
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I have the 2.490 in for CLT and mazda sensor. r4
I have a 2.2 in for IAT and the GM sensor. r7 (i had pulled/damaged r7 per misreading advice, and could only find a 2.2 locally)

I get 2.4v (at least on last check) with the GM sensor and a generic replacement i tested the other day. Both were reading about -14c on a nice 24c (clt reading) day.

I've also moved the .inc files to the proper location after creation.
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Old 08-15-2007, 01:33 PM   #49
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Bloody hell... i think i might know the issue now.

I kept dropping the .inc files into the Megasquirt/mgCfg folder... not the car specific one.

BLARGH!

I'll report back tonight.
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Old 08-15-2007, 01:50 PM   #50
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Quote:
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250mph ?
grrr.... 211mph with 2 cylinders acting up-- valvetrain issues. We dropped an exhaust valve on that 211mph run yesterday and holed a piston.

But as they say, That's racin' -- we'll try again

The Buick set 2 records in slower classes in the 135-142mph range. They were going back for a 3rd today.

Freiburger's car (Hotrod Special) had set 2 and was going back for a 3rd as well.
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Old 08-15-2007, 02:42 PM   #51
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So a MS'ed miata went 200+mph
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Old 08-15-2007, 02:48 PM   #52
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So a MS'ed miata went 200+mph
Sorry-- I should have clarified... that was a twin-turbo 515ci Studebaker-- MS'd though

It's the one on our website.

I'm toying with the idea of building a landspeed car-- I've got to scour the rulebooks and recordbook to see what makes sense. If a Miata makes sense that would be cool. I'd love it actually. I know there was one that ran a while back and did 152mph but I'm not sure if he ever came back for more.
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Old 08-16-2007, 09:30 AM   #53
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Awesome Jerry, yeah i think leadfoot on .net did a bonnevile miata.
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Old 08-17-2007, 12:03 AM   #54
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Put the INC files in the proper folder. The main Megasquirt mtCfg folder is NOT the right spot .

Put the files into Car1 and all good

Oh... and I timed the car... was at like 24 degrees instead of 10

Last edited by Splitime; 08-17-2007 at 12:34 AM.
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