Time to do some upgrades
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- Helpful MS/Extra'er
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Time to do some upgrades
I built this ecu back in 09. Had a lot of battles along the way however it got me in 4th this year in the local auto x. Its now time to do some more upgrades to the ecu / more tuning.
Engine / chassis: 1987 BMW 325e, m20b27, I head.
Custom wiring harness.
MS2 V3.0
six evo 8 injectors 550cc Low impedance - 2 ohms.
1. I have recently realized that my low z injectors are probably causing my voltage spikes/drops that i have been battling forever.
Battery Spikes by euro2fast4u, on Flickr
My current thought is that i do not have the correct fly back circuit per the ms manual located here http://www.megamanual.com/ms2/V3trouble.htm
Item # 16
datalog of spike http://www.megafileupload.com/cfvI/2016 ... .51.16.msl
Current Tune: http://www.megafileupload.com/cfvK/CurrentTune.msq
2016-12-07_08-55-17 by euro2fast4u, on Flickr
My Question really is, i need a sketch or a walk through of how to modify my ecu to incorporate this new circuit. I am so far out side the loop on what each drive does and i dont want to screw something up.
EDIT: The more i dig the more i find old information. I can not find a walk through on how to fix this flyback ciruit and remove the noise.
After writing all this i think ill make new thread for the other two items. Adding Launch control, and adding electric fan control.
Engine / chassis: 1987 BMW 325e, m20b27, I head.
Custom wiring harness.
MS2 V3.0
six evo 8 injectors 550cc Low impedance - 2 ohms.
1. I have recently realized that my low z injectors are probably causing my voltage spikes/drops that i have been battling forever.
Battery Spikes by euro2fast4u, on Flickr
My current thought is that i do not have the correct fly back circuit per the ms manual located here http://www.megamanual.com/ms2/V3trouble.htm
Item # 16
datalog of spike http://www.megafileupload.com/cfvI/2016 ... .51.16.msl
Current Tune: http://www.megafileupload.com/cfvK/CurrentTune.msq
2016-12-07_08-55-17 by euro2fast4u, on Flickr
My Question really is, i need a sketch or a walk through of how to modify my ecu to incorporate this new circuit. I am so far out side the loop on what each drive does and i dont want to screw something up.
EDIT: The more i dig the more i find old information. I can not find a walk through on how to fix this flyback ciruit and remove the noise.
After writing all this i think ill make new thread for the other two items. Adding Launch control, and adding electric fan control.
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Re: Time to do some upgrades
You might be just better off doing something like this:
http://jbperf.com/p&h_board/index.html
Edit: Actually sorry, that board can only do 4 injectors,s o you'd have to use two of them.
http://jbperf.com/p&h_board/index.html
Edit: Actually sorry, that board can only do 4 injectors,s o you'd have to use two of them.
Re: Time to do some upgrades
are you running a turbo do you need the 550cc injectors? you could try adding series resistor to the injectors so they work like high z injectors but will slow them down slightly.
or read section 13.6 @ http://www.msextra.com/doc/pdf/html/MS2 ... 4-196.html
launch control switch input:
http://www.msextra.com/doc/pdf/html/MS2 ... .4-32.html
and
http://www.msextra.com/doc/pdf/html/MS2 ... .4-33.html
and adding a felay control circuit for your fan:
http://www.msextra.com/doc/pdf/html/MS2 ... e-3.4.html
or read section 13.6 @ http://www.msextra.com/doc/pdf/html/MS2 ... 4-196.html
launch control switch input:
http://www.msextra.com/doc/pdf/html/MS2 ... .4-32.html
and
http://www.msextra.com/doc/pdf/html/MS2 ... .4-33.html
and adding a felay control circuit for your fan:
http://www.msextra.com/doc/pdf/html/MS2 ... e-3.4.html
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
Re: Time to do some upgrades
I have an RV8 running the original low impedance injectors without resistors (PWM) in batch mode - so 4 per driver. I too had those spikes in a log. There is a mod to sort that - you run an extra and independent +12v feed to the injector driver circuits. You'll find details in the manual. But although it got rid of the spikes in the log, it made no difference I could tell to the running of the car.
Rover SD1 3.5 EFI
MS2 V3
EDIS
Tech Edge O2
London UK.
MS2 V3
EDIS
Tech Edge O2
London UK.
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Re: Time to do some upgrades
That's an ancient web-page. Your mainboard (V3.0) incorporates that flyback circuit already.euro2fast4u wrote:My Question really is, i need a sketch or a walk through of how to modify my ecu to incorporate this new circuit. I am so far out side the loop on what each drive does and i dont want to screw something up.
As Dave says though, re-routing the 12V feed may help and is covered in the manual here: http://www.msextra.com/doc/pdf/html/MS2 ... 4-196.html
James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk
My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
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Re: Time to do some upgrades
Also, as a first step, ensure you have a capacitor installed across "H1 Boot" on the mainboard. It was 0.22u.
James
James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk
My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
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Re: Time to do some upgrades
Wow that k you everyone for the help. This spike and drop seems to cause more then one issue and was just the first thing in the log that occurs.
I don't mind supplying power to the tip125 but just want to make sure it will help.
Guess what I don't have the cap on hi boot. Photo in a few hours.
I don't mind supplying power to the tip125 but just want to make sure it will help.
Guess what I don't have the cap on hi boot. Photo in a few hours.
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Re: Time to do some upgrades
Yes i will be running a turbo again, new one is waiting for all of this stuff to get fixed first before i add boost.grom_e30 wrote:are you running a turbo do you need the 550cc injectors? you could try adding series resistor to the injectors so they work like high z injectors but will slow them down slightly.
or read section 13.6 @ http://www.msextra.com/doc/pdf/html/MS2 ... 4-196.html
launch control switch input:
http://www.msextra.com/doc/pdf/html/MS2 ... .4-32.html
and
http://www.msextra.com/doc/pdf/html/MS2 ... .4-33.html
and adding a felay control circuit for your fan:
http://www.msextra.com/doc/pdf/html/MS2 ... e-3.4.html
Thank you for the launch control
looks like step one is to install a cap on h1.
if that doesn't help run independent power lines to the center of the drivers.
install the circuit for launch control.
your link for the fan control takes me to the beginning and searching the page didn't result any direction.
Re: Time to do some upgrades
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
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Re: Time to do some upgrades
Perfect thank you. So then i guess my next question would be. How do i connect to the db37 for outputs/input wires.
I also wanna make sure i choose the correct one.
Re: Time to do some upgrades
you have 4 spare pins on the db37
spr1 = pin 3 db37
spr2 = pin 4 db37
spr3 = pin 5 db37
spr4 = pin 6 db37
spr1 = pin 3 db37
spr2 = pin 4 db37
spr3 = pin 5 db37
spr4 = pin 6 db37
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
Re: Time to do some upgrades
I'm a big fan of P&H drivers.
Correctly identify your MS ecu here
Read the Do's and Don'ts to avoid the common pitfalls before starting your install or asking for help
Use only these manuals other manuals may cause brain damage or worse.
Read the Do's and Don'ts to avoid the common pitfalls before starting your install or asking for help
Use only these manuals other manuals may cause brain damage or worse.
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Re: Time to do some upgrades
Question. I wanna have variable fan speed control. i think this is only on off.
Also i do not have idle control. Can i use those outputs and wires for any of these modifications?
Re: Time to do some upgrades
how do you mean variable fan speed, like a 2 speed fan relay then yes, but not pwm variable fan control. and yeah did you populate the fidle bits? if so they could drive a relay.
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
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Re: Time to do some upgrades
My current fan is very loud and over kill except for hot track days.grom_e30 wrote:how do you mean variable fan speed, like a 2 speed fan relay then yes, but not pwm variable fan control. and yeah did you populate the fidle bits? if so they could drive a relay.
it curently turns off and on. I would like to have the ecu control a ssr that would allow me run the fan at different speeds.
ie
below 160° = 0% speed
below 170° = 25% speed
below 180° = 40% speed
below 190° = 50% speed
below 200° = 75% speed
below 210° = 100% speed
I would also like to turn it off when its above a certain RPM and TPS or maybe by rpmdot. idk
Re: Time to do some upgrades
you will need ms3 for that.
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
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Re: Time to do some upgrades
blasphemygrom_e30 wrote:you will need ms3 for that.
Re: Time to do some upgrades
no megasquirt 3 rocks and you could have anti-lag to go with you turbo as well
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
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Re: Time to do some upgrades
I swear there was pwm output for ms2 lol. maybe not swear but i may have seen over the last 9 years ms2 and pwm output hahahgrom_e30 wrote:no megasquirt 3 rocks and you could have anti-lag to go with you turbo as well
Just ordered .22uf capacitors and a gm screw in iat sensor.