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2008-08-11 01:35:47 (21 weeks 2 days 22 hours 31 minutes 28 seconds) #1833815 | | view posts since this          #1 

gurov
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gennady gurov

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got my spec running on megasquirt FUEL ONLY -stock temperature sensors

finally finished up the wiring and fired the thing up, just need to tune it now:

http://www.youtube.com/watch?v=AX80NN61aX0

megasquirt bias resistors removed:
http://gurov.us/shoebox/index.php/3be81b1b13cdc217ad32ab5d999cebc3/2008-08-10-megasquirt-specv-fuel-only/P1010395.sized.JPG#bottom

harness ran through the firewall:
http://gurov.us/shoebox/index.php/2ea71511225200aded5a842d875cbd3b/2008-08-10-megasquirt-specv-fuel-only/P1010444.sized.JPG#bottom

wiring mess i've accumulated:
http://gurov.us/shoebox/index.php/16bdc1230f599f456999065b2113272f/2008-08-10-megasquirt-specv-fuel-only/P1010458.sized.JPG#bottom

temperature sensors reading the same, one window is obd2 reader, another - megatune
http://gurov.us/shoebox/index.php/16bdc1230f599f456999065b2113272f/2008-08-10-megasquirt-specv-fuel-only/P1010458.sized.JPG#bottom

lc1's output 2 configured for a linear output:
http://gurov.us/shoebox/index.php/018b4ca64d01e0307ba07d0f84c6528f/2008-08-10-megasquirt-specv-fuel-only/P1010485.sized.JPG#bottom

engine running:
http://gurov.us/shoebox/index.php/b49d6281b5e9586d5cf6b90a6bac88dc/2008-08-10-megasquirt-specv-fuel-only/P1010487.sized.JPG#bottom


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MegaSquirt-I standalone - unit #0 (fuel only mode), gsquirt board v1.0, Pivot 3 Drive Throttle Controller,
J&S UltraSafeguard individual cylinder knock suppression system, Autosport Wiring Engine Harness
660cc msd injectors, 255 walbro fuel pump, JGY fuel rail,  t3/t4 57trim, Coolingmist Varicool Progressive Alky controller,
Shurtank with 150psi alky pump.

05 automatic se-r: upcoming turbo project
04 BMW 325xi - daily driver

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2008-08-11 01:39:14 (21 weeks 2 days 22 hours 28 minutes 1 second) #1833820 | | view posts since this          #2 

rancidpunkroger

Roger Steadman

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

no clue what any of that is but cool i trust you know what it is


Nissan Motorsports is called nismo
So i guess Honda Motorsports is ummmm  HOMO?
I/H/E/ Custom made Grille/ 11 speaker sound system/ Its Rogeengeneering at its best-ADSPECV
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2008-08-11 01:53:47 (21 weeks 2 days 22 hours 13 minutes 28 seconds) #1833846 | | view posts since this          #3 

speedjunkie

Richard Greer

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

you know gurov, i would have figured you wouldnt have a wiring mess like that on your floor board, but then again i also thought you wouldnt have a shit ton a gauges in your car either.  its cool you got it up and running, when you going to take the plunge and hook up the ignition?

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2008-08-11 01:56:50 (21 weeks 2 days 22 hours 10 minutes 25 seconds) #1833850 | | view posts since this          #4 

SpecV118

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

ooo hmm smiley-smile


Preston Sherer
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2008-08-11 01:57:24 (21 weeks 2 days 22 hours 9 minutes 51 seconds) #1833854 | | view posts since this          #5 

bartak007

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

what are the bias resistors for?  sorry i'm a MS newb but have plans for one when I graduate


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2008-08-11 01:58:27 (21 weeks 2 days 22 hours 8 minutes 48 seconds) #1833856 | | view posts since this          #6 

gurov
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gennady gurov

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

speedjunkie wrote:

you know gurov, i would have figured you wouldnt have a wiring mess like that on your floor board, but then again i also thought you wouldnt have a shit ton a gauges in your car either.  its cool you got it up and running, when you going to take the plunge and hook up the ignition?

once i log enough of what the stock ecu does with timing to be able to tune the HQR and this car as close to stock timing curve as possible.

the wiring mess should get cleaned up... it's really just a bunch of grounds and a bunch of power wires going places...


http://gurov.us/sig1.png
04 turbo @ 14 psi -
MegaSquirt-I standalone - unit #0 (fuel only mode), gsquirt board v1.0, Pivot 3 Drive Throttle Controller,
J&S UltraSafeguard individual cylinder knock suppression system, Autosport Wiring Engine Harness
660cc msd injectors, 255 walbro fuel pump, JGY fuel rail,  t3/t4 57trim, Coolingmist Varicool Progressive Alky controller,
Shurtank with 150psi alky pump.

05 automatic se-r: upcoming turbo project
04 BMW 325xi - daily driver

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2008-08-11 01:58:49 (21 weeks 2 days 22 hours 8 minutes 26 seconds) #1833857 | | view posts since this          #7 

speedjunkie

Richard Greer

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

the bias resistors he is talking about is so the megasquirt can interpret the stock inatke temp and coolt temp sensors and display the correct reading in megatune

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2008-08-11 01:59:45 (21 weeks 2 days 22 hours 7 minutes 30 seconds) #1833861 | | view posts since this          #8 

speedjunkie

Richard Greer

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

gurov wrote:

speedjunkie wrote:

you know gurov, i would have figured you wouldnt have a wiring mess like that on your floor board, but then again i also thought you wouldnt have a shit ton a gauges in your car either.  its cool you got it up and running, when you going to take the plunge and hook up the ignition?

once i log enough of what the stock ecu does with timing to be able to tune the HQR and this car as close to stock timing curve as possible.

the wiring mess should get cleaned up... it's really just a bunch of grounds and a bunch of power wires going places...

your just going to keep the timing stock?

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2008-08-11 02:00:09 (21 weeks 2 days 22 hours 7 minutes 6 seconds) #1833862 | | view posts since this          #9 

gurov
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gennady gurov

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

bartak007 wrote:

what are the bias resistors for?  sorry i'm a MS newb but have plans for one when I graduate

it's used to measure the resistance of a thermistor as a voltage.

5v is applied through a resistor to the thermistor connected to ground, and voltage is measured at the junction of two resistors, i.e. past the bias resistor.

since the stock ecu is already connected to the thermistor, you can simply read the voltage and convert that to temperature.

you would leave the bias resistor in the megasquirt if you were installing new thermal sensors


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04 turbo @ 14 psi -
MegaSquirt-I standalone - unit #0 (fuel only mode), gsquirt board v1.0, Pivot 3 Drive Throttle Controller,
J&S UltraSafeguard individual cylinder knock suppression system, Autosport Wiring Engine Harness
660cc msd injectors, 255 walbro fuel pump, JGY fuel rail,  t3/t4 57trim, Coolingmist Varicool Progressive Alky controller,
Shurtank with 150psi alky pump.

05 automatic se-r: upcoming turbo project
04 BMW 325xi - daily driver

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2008-08-11 02:01:27 (21 weeks 2 days 22 hours 5 minutes 48 seconds) #1833863 | | view posts since this          #10 

speedjunkie

Richard Greer

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

so you completely removed the bias resistors in the megasquirt?  havent heard of doing that?  can you explain alittle more?

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2008-08-11 02:02:03 (21 weeks 2 days 22 hours 5 minutes 12 seconds) #1833865 | | view posts since this          #11 

gurov
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gennady gurov

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

speedjunkie wrote:

gurov wrote:

speedjunkie wrote:

you know gurov, i would have figured you wouldnt have a wiring mess like that on your floor board, but then again i also thought you wouldnt have a shit ton a gauges in your car either.  its cool you got it up and running, when you going to take the plunge and hook up the ignition?

once i log enough of what the stock ecu does with timing to be able to tune the HQR and this car as close to stock timing curve as possible.

the wiring mess should get cleaned up... it's really just a bunch of grounds and a bunch of power wires going places...

your just going to keep the timing stock?

for now... it is my belief that the stock ecu does a hell of a lot better job at managing boost timing than we give it credit for. it's going to be logged via LMA3 (auxbox) and the external crank angle wheel i just added for the megasquirt.

next step for this would be to figure out how much off my timing is (fuel doesn't require very precise timing), and enter these things into the LMA3 so i can graph some rpm vs map vs ignition graphs and make up an excel sheet for this.


http://gurov.us/sig1.png
04 turbo @ 14 psi -
MegaSquirt-I standalone - unit #0 (fuel only mode), gsquirt board v1.0, Pivot 3 Drive Throttle Controller,
J&S UltraSafeguard individual cylinder knock suppression system, Autosport Wiring Engine Harness
660cc msd injectors, 255 walbro fuel pump, JGY fuel rail,  t3/t4 57trim, Coolingmist Varicool Progressive Alky controller,
Shurtank with 150psi alky pump.

05 automatic se-r: upcoming turbo project
04 BMW 325xi - daily driver

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2008-08-11 02:03:55 (21 weeks 2 days 22 hours 3 minutes 20 seconds) #1833869 | | view posts since this          #12 

speedjunkie

Richard Greer

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

you sure have a better approach at this then i did when i tuned my neon, i guessed at the fuel table and spark tables and still managed to get a running and driveable tune that got 20 mpg in an hour, of course with the help of my wideband, a.f target table, and autotune (for the fuel part)

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2008-08-11 02:04:07 (21 weeks 2 days 22 hours 3 minutes 8 seconds) #1833870 | | view posts since this          #13 

gurov
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gennady gurov

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

speedjunkie wrote:

so you completely removed the bias resistors in the megasquirt?  havent heard of doing that?  can you explain alittle more?

sure:

http://www.megamanual.com/v22manual/share.gif

R1 is the bias resistor
the junction between the two is the output voltage
R2 is the thermistor

voltage is applied via R1 to ground via the thermistor.

see more here: http://www.megamanual.com/v22manual/sharesen.htm


http://gurov.us/sig1.png
04 turbo @ 14 psi -
MegaSquirt-I standalone - unit #0 (fuel only mode), gsquirt board v1.0, Pivot 3 Drive Throttle Controller,
J&S UltraSafeguard individual cylinder knock suppression system, Autosport Wiring Engine Harness
660cc msd injectors, 255 walbro fuel pump, JGY fuel rail,  t3/t4 57trim, Coolingmist Varicool Progressive Alky controller,
Shurtank with 150psi alky pump.

05 automatic se-r: upcoming turbo project
04 BMW 325xi - daily driver

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2008-08-11 02:05:27 (21 weeks 2 days 22 hours 1 minute 48 seconds) #1833872 | | view posts since this          #14 

gurov
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gennady gurov

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

speedjunkie wrote:

you sure have a better approach at this then i did when i tuned my neon, i guessed at the fuel table and spark tables and still managed to get a running and driveable tune that got 20 mpg in an hour, of course with the help of my wideband, a.f target table, and autotune (for the fuel part)

i plan on using megalogviewer to tune the fuel

it's so easy. cause you can keep ego correction on and it will still be able to adjust the maps properly.


http://gurov.us/sig1.png
04 turbo @ 14 psi -
MegaSquirt-I standalone - unit #0 (fuel only mode), gsquirt board v1.0, Pivot 3 Drive Throttle Controller,
J&S UltraSafeguard individual cylinder knock suppression system, Autosport Wiring Engine Harness
660cc msd injectors, 255 walbro fuel pump, JGY fuel rail,  t3/t4 57trim, Coolingmist Varicool Progressive Alky controller,
Shurtank with 150psi alky pump.

05 automatic se-r: upcoming turbo project
04 BMW 325xi - daily driver

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2008-08-11 02:09:16 (21 weeks 2 days 21 hours 57 minutes 59 seconds) #1833879 | | view posts since this          #15 

speedjunkie

Richard Greer

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

yeah well when i tuned my neon megalogviewer didnt have that spiffy fuel tuning crap so i had to do it the "hard way".  That sure is interesting about the sharing sensors with the stock ecu, all the neon guys arent doing that, they are getting resistors that are the correct value and putting them inplace of the pre-existing bias resistors in the megasquirt box.  I guess if you do it that way (the way the neon guys do it) you dont have to mess with easy therm.  I could care less though, I am using the gm sensors and I also dont have anything that closely resembles a stock pcm anywhere near my car.

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2008-08-11 02:10:55 (21 weeks 2 days 21 hours 56 minutes 20 seconds) #1833881 | | view posts since this          #16 

gurov
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gennady gurov

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

speedjunkie wrote:

yeah well when i tuned my neon megalogviewer didnt have that spiffy fuel tuning crap so i had to do it the "hard way".  That sure is interesting about the sharing sensors with the stock ecu, all the neon guys arent doing that, they are getting resistors that are the correct value and putting them inplace of the pre-existing bias resistors in the megasquirt box.  I guess if you do it that way (the way the neon guys do it) you dont have to mess with easy therm.  I could care less though, I am using the gm sensors and I also dont have anything that closely resembles a stock pcm anywhere near my car.

i will actually post the easy-therm files and the firmware that i used for the MS1 boxes. the MS2 box i tested today can do it online. and that worked perefectly too


http://gurov.us/sig1.png
04 turbo @ 14 psi -
MegaSquirt-I standalone - unit #0 (fuel only mode), gsquirt board v1.0, Pivot 3 Drive Throttle Controller,
J&S UltraSafeguard individual cylinder knock suppression system, Autosport Wiring Engine Harness
660cc msd injectors, 255 walbro fuel pump, JGY fuel rail,  t3/t4 57trim, Coolingmist Varicool Progressive Alky controller,
Shurtank with 150psi alky pump.

05 automatic se-r: upcoming turbo project
04 BMW 325xi - daily driver

Online

 

2008-08-11 02:12:28 (21 weeks 2 days 21 hours 54 minutes 47 seconds) #1833884 | | view posts since this          #17 

speedjunkie

Richard Greer

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

sweet, so have you thought about getting into the business of building and selling these megasquirts to the nissan community (mainly the se-r's and spec-v's)?

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2008-08-11 02:15:57 (21 weeks 2 days 21 hours 51 minutes 18 seconds) #1833886 | | view posts since this          #18 

gurov
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gennady gurov

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Re: got my spec running on megasquirt FUEL ONLY -stock temperature sensors

speedjunkie wrote:

sweet, so have you thought about getting into the business of building and selling these megasquirts to the nissan community (mainly the se-r's and spec-v's)?

i've thought about it. but it would have to be somewhat hand-picked and elite crowd, and i really wouldn't make any money off it. it would be more of a service.

like right now, i have 3 boxes sitting here, all 3 are capable of running the engine, both fuel and ignition. cheapest one being the v2.2 ms1 and most expensive one being the v3.0 ms2


http://gurov.us/sig1.png
04 turbo @ 14 psi -
MegaSquirt-I standalone - unit #0 (fuel only mode), gsquirt board v1.0, Pivot 3 Drive Throttle Controller,
J&S UltraSafeguard individual cylinder knock suppression system, Autosport Wiring Engine Harness
660cc msd injectors, 255 walbro fuel pump, JGY fuel rail,  t3/t4 57trim, Coolingmist Varicool Progressive Alky controller,
Shurtank with 150psi alky pump.

05 automatic se-r: upcoming turbo project
04 BMW 325xi - daily driver

Online