mS on 2004 - Page 6 - 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 08-19-2006, 06:23 AM   #101
Senior Member
 
Join Date: Dec 2004
Location: Brisbane, Australia
Posts: 1,272
Total Cats: 32
Default

Awesome!!!

Are you using the stock temp sensors? If so what was involved in getting them to work nicely?
timk is offline   Reply With Quote
Old 08-19-2006, 08:05 AM   #102
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

Yes, I am using the stock temperature sensors. The air temperature seems to be very accurate, the coolant temperature is a bit off (maybe 5-8C) but I'm not too worried. I order to get them to work, I measured the voltage and resistance as mentioned here:

http://www.megamanual.com/v22manual/sharesen.htm
Reverant is offline   Reply With Quote
Old 08-20-2006, 09:42 AM   #103
Junior Member
 
Join Date: Oct 2005
Location: Sweden
Posts: 48
Total Cats: 0
Default

Quote:
Originally Posted by Reverant View Post
Yes, I am using the stock temperature sensors. The air temperature seems to be very accurate, the coolant temperature is a bit off (maybe 5-8C) but I'm not too worried. I order to get them to work, I measured the voltage and resistance as mentioned here:

http://www.megamanual.com/v22manual/sharesen.htm
hno: Ahhhh! I thought I figured it out. I was gonna share all the sensors with the stock ECU and the only mods Il do with the V3-board is the simple mods with the 1k 1/4w Resistor and the two 470 ohm 1/4w Resistors. Then I would let MS take control over the stock injectors and TAADAA!! Il have a fuel only MS.
But now this!
Ok, I have looked at it but I dont really understand what Im supose to do once I figured out the stock bias resistor. I understand that I should remove the 2.49k bias resistors on the MegaSquirt, R4 & R7. But what am I supose to do next?

/Fredrik
bfd_henriksson is offline   Reply With Quote
Old 08-20-2006, 09:48 AM   #104
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

After removing R4 and R7, just use the values I posted above in Easytherm, like this:



Then use the Easytherm instructions to download the new sensor data to Megasquirt. That's about it.

You still need to get a CAS from a NA Miata, the stock ones cannot be used.
Reverant is offline   Reply With Quote
Old 08-20-2006, 02:47 PM   #105
Junior Member
 
Join Date: Oct 2005
Location: Sweden
Posts: 48
Total Cats: 0
Default

Quote:
Originally Posted by Reverant View Post
After removing R4 and R7, just use the values I posted above in Easytherm, like this:



Then use the Easytherm instructions to download the new sensor data to Megasquirt. That's about it.

You still need to get a CAS from a NA Miata, the stock ones cannot be used.
Thanks!
Now things are starting to get clearer.
Since I have a NA 1.8 -95 there is no problem using the stock CAS, but can I use your NB bias resistor values for my 1.8?

How did you get the resistance-values under "Enter Temp-Resistance Pairs"?

/Fredrik
bfd_henriksson is offline   Reply With Quote
Old 08-20-2006, 03:20 PM   #106
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

Quote:
Originally Posted by bfd_henriksson View Post
Since I have a NA 1.8 -95 there is no problem using the stock CAS, but can I use your NB bias resistor values for my 1.8?
It is safe to assume that no, the 94-97 ECU has different bias resistors for both the air and the coolant temp sensor.

Quote:
Originally Posted by bfd_henriksson View Post
How did you get the resistance-values under "Enter Temp-Resistance Pairs"?
I got one value from measuring the resistance of the sensor and at the same time watching the air/coolant temperature from the OBD-II port. The other values were taken from the Resistance/Temperature plots that are in the Mazda service manual for my '02.
Reverant is offline   Reply With Quote
Old 08-20-2006, 07:24 PM   #107
Senior Member
 
Join Date: Dec 2004
Location: Brisbane, Australia
Posts: 1,272
Total Cats: 32
Default

Did you replace the resistors with jumpers?
timk is offline   Reply With Quote
Old 08-20-2006, 07:44 PM   #108
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

No, I just left them out. That's what the manual says.
Reverant is offline   Reply With Quote
Old 08-21-2006, 07:02 AM   #109
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

Some pics to wet your appetite:


Reverant is offline   Reply With Quote
Old 08-21-2006, 08:54 AM   #110
Junior Member
 
Join Date: Oct 2005
Location: Sweden
Posts: 48
Total Cats: 0
Default

Quote:
Originally Posted by Reverant View Post
Some pics to wet your appetite:


bfd_henriksson is offline   Reply With Quote
Old 08-23-2006, 07:25 PM   #111
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

Tuning on the road has begun. This is so much fun - I wonder how people can bare paying money so they can miss all this fun!
Reverant is offline   Reply With Quote
Old 08-26-2006, 06:03 PM   #112
Junior Member
 
Join Date: Jun 2006
Posts: 128
Total Cats: 0
Default

You know, I've been playing with the idea of a similar touchscreen laptop run setup and I keep running into the same problem: Vibration. At work I am constantly on my laptop and driving and have destroyed 2 harddrives in 2 years. The techs all say the same thing, that the vibrations of my truck bouncing down a dirt road coupled with the hd spinning at 7200rpm, things get scratched and bent. Are you using some sort of flashdrive void of these problems or are you just banking on never hitting a big pothole/small animal/curb/Hummer with your car.

Also I see you ejected the radio. I am planning to run a Sirius radio through the laptop, through a amp, and into the speakers, allowing me to still control everything from the screen. What type of setup are you planning or do you enjoy listening to youself think more then the added weight of music.
Dr. Nick is offline   Reply With Quote
Old 08-27-2006, 03:28 PM   #113
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

The whole carputer thingy started because I have a thing for music and I just couldn't stand swapping CDs in and out. I'm using a laptop as the main unit, so the hard drive spins at 4200rpm and is vibration-resistand, contrary to desktop hard drives. Greece is infamous for having roads that resemble a bombarded scenery (ie uneven tar patches, holes, sewer drains, etc) which means that I bump over a major one at least once every 5 seconds in the 15 miles I drive every day. So far, so good.

As far as radio is concerned, I can't really find a station that will match my taste/mood for any given moment, thus the 3,000 track MP3 library in the car.
Reverant is offline   Reply With Quote
Old 09-08-2006, 04:31 AM   #114
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

Got the stock CLT and MAT sensors to work perfectly, ie copycat of the temperatures reported by the stock ECU using OBD-II. So no need to get extra sensors for your 2001-2005, these are really REALLY accurate. Attached are my thermfactor.inc, airdenfactor.inc, matfactor.inc. You will need to download the source code of the MSNSE firmware, drop these files in (replacing the stock GM files), recompile the code and flash the MS with the new firmware.
Attached Files
File Type: zip inc-2002.zip (7.4 KB, 38 views)
Reverant is offline   Reply With Quote
Old 09-08-2006, 03:07 PM   #115
Newb
 
Join Date: Sep 2006
Posts: 12
Total Cats: 0
Default

Vibration Fix, get a solid state disk drive, 8 gigs are enough to install XP Pro with room for some MP3s. Roughly $300 and fits in a laptop HDD bay. The 16GB version is $500. They're only getting cheaper. Here's a link, can't make it work with edit http://froogle.google.com/froogle?q=...en&btnG=Search

Nice work Reverant, can't wait to get mine.

Last edited by McKirkus; 09-08-2006 at 04:28 PM.
McKirkus is offline   Reply With Quote
Old 09-11-2006, 04:48 AM   #116
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

Right. In about 8 to 10 work hours, I got the whole thing sorted out. Runs like stock in lower/mid rpm and light loads, screams at high rpms, very responsive when opening the throttle (using MAPdot as the AE algorithm, TPSdot won't work properly throughout the entire RPM range). The only thing left is to fine tune the idle AFR once I am 101% happy with the entire VE table.

All in all, I am 111% satisfied with selecting MS as my engine management system!
Reverant is offline   Reply With Quote
Old 09-11-2006, 06:11 AM   #117
Senior Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Sweden
Posts: 1,391
Total Cats: 58
Default

Quote:
Originally Posted by Reverant View Post
All in all, I am 111% satisfied with selecting MS as my engine management system!
When you have settled down a bit from the initial exhitement , could you check if the fuel milage have changed (I'm trying to find a valid economical reason before taking the plunge)?
I'm hoping that the cruice will be a bit leaner after tuning and even the slightest reduction in fuel consumption could be used to make the case (even if it takes a million miles before brake even)
NiklasFalk is offline   Reply With Quote
Old 09-11-2006, 06:12 AM   #118
Senior Member
 
Join Date: Dec 2004
Location: Brisbane, Australia
Posts: 1,272
Total Cats: 32
Default

Nice work! How'd you come up with your timing map and have you played with it much?
timk is offline   Reply With Quote
Old 09-11-2006, 06:32 AM   #119
Supporting Vendor
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,440
Total Cats: 198
Default

@niklas: Normally, 20 euros would yield about 130-140km. In the days where I was tuning that number has been 170km, twice. I have overrun activated so when I get my foot off the gas completely and coasting down, the injectors are off. We will see what happens within the next few weeks.

@saboteur: Sorry, forgot to mention. Fuel only for now, I'll be dealing with ignition next week. Just wanted to make sure that my injection is perfect before I add another X factor in the whole equation.

Jim
Reverant is offline   Reply With Quote
Old 10-06-2006, 08:43 PM   #120
Senior Member
 
Join Date: Dec 2004
Location: Brisbane, Australia
Posts: 1,272
Total Cats: 32
Default

Hey Jim,

Any news on getting ignition going?

Cheers
timk is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
elesjuan's mediocre 95 Miata adventure (google fiber edition) elesjuan Build Threads 8 02-16-2016 09:36 PM
HKS bolt on kit... on a 2004 1.8 VVT? simonetrb Prefabbed Turbo Kits 18 08-25-2009 10:43 AM
2004 Mazda Miata for sale swingdancr Cars for sale/trade 5 08-20-2009 09:24 AM
Misc miata parts. amex101 Miata parts for sale/trade 2 06-01-2009 01:54 PM
2004 totaled Selling some stuff. atomicfrawg Miata parts for sale/trade 17 05-01-2009 10:02 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 11:18 AM.