Megasquirt .. what is latest on who is runing one. ? and boards were can you buy

[gurov]

oooh, megasquirt discussion .

i just got done installing ms2 (3.0.3t with some mods in the code) on my mark4. Zeal engineering dual VR board for the crank/cam input (dual wheel 12 crank teeth, 1 cam tooth). using fields patch harness. sharing coolant temp sensor, and i put an open element gm iat into the throttle body.

it's just controlling fuel for now, leaving the ignition to the stock ecu, which works out awesomely.

i'm using table switching, so there's 2 fuel tables (below 110 kpa, and above 120 kpa), switch happens at 115 kpa, so the resolution is 16x32 cells. tuning is done via tunerstudio's live ve analyzer, which works exceptionally well. lc-1 is putting out 10-16 afr range across 0-5volts analog output.

i have ignition working also, but when i actually hooked it up and threw a timing light on it, it was wandering around between idle at 3-4 grand, so i'll have to look into that some more (maybe switch to NE2 for cam VR, as that should reduce the offset angle for dual wheel)

this is 2nd car i have running on megasquirt, the other one is a se-r specv with 57 trim t3/t4 on a built qr25de boosting about 20 psi. the sentra has a megasquirt3 daughterboard, which is quite awesome.

all the boards are v3.0.

[gennro]

oooh, megasquirt discussion .

i just got done installing ms2 (3.0.3t with some mods in the code) on my mark4. Zeal engineering dual VR board for the crank/cam input (dual wheel 12 crank teeth, 1 cam tooth). using fields patch harness. sharing coolant temp sensor, and i put an open element gm iat into the throttle body.

it's just controlling fuel for now, leaving the ignition to the stock ecu, which works out awesomely.

i'm using table switching, so there's 2 fuel tables (below 110 kpa, and above 120 kpa), switch happens at 115 kpa, so the resolution is 16x32 cells. tuning is done via tunerstudio's live ve analyzer, which works exceptionally well. lc-1 is putting out 10-16 afr range across 0-5volts analog output.

i have ignition working also, but when i actually hooked it up and threw a timing light on it, it was wandering around between idle at 3-4 grand, so i'll have to look into that some more (maybe switch to NE2 for cam VR, as that should reduce the offset angle for dual wheel)

this is 2nd car i have running on megasquirt, the other one is a se-r specv with 57 trim t3/t4 on a built qr25de boosting about 20 psi. the sentra has a megasquirt3 daughterboard, which is quite awesome.

all the boards are v3.0.

Nice man you know you could stick a 36-1 trigger wheel on your crank pulley and keep the cam position just incase you ever go to sequintial. I'm pretty sure that 12 tooth wheel just won't give the resolution needed specially if you are doing the 6 VB291's for coil on plug there. I may be wrong but that may be whats going on.

[gurov]

Nice man you know you could stick a 36-1 trigger wheel on your crank pulley and keep the cam position just incase you ever go to sequintial. I'm pretty sure that 12 tooth wheel just won't give the resolution needed specially if you are doing the 6 VB291's for coil on plug there. I may be wrong but that may be whats going on.

eh, i'd rather keep the 12 tooth on there.

i don't think i'll do sequential ignition, for now i tried firing the stock coils paired in like throws (1 6 ,2 5 , 3 4) using logic level (low current +5v square wave) outputs to the stock igniter off the front 3 LEDS. and that worked fine, but wandered idle vs rev. in all actuality, when i actually do go large single turbo with ignition control, i'll probably just wire up 6x ls2 coils cause i know how those respond.

as far as resolution on the 12 tooth, i think with ms3 it should be a bit better, given that it's a faster cpu with supposedly some improvements. the ms3 works fine on my sentra going off stock wonky 36-2-2 crank wheel and "number of pulses equals cylinder about to fire" cam wheel

on the slight offtopic, is your holset a variable geometry rig ? i just got an hx40 to go on the sentra, so i'll see how that goes.

[gennro]

eh, i'd rather keep the 12 tooth on there.

i don't think i'll do sequential ignition, for now i tried firing the stock coils paired in like throws (1 6 ,2 5 , 3 4) using logic level (low current +5v square wave) outputs to the stock igniter off the front 3 LEDS. and that worked fine, but wandered idle vs rev. in all actuality, when i actually do go large single turbo with ignition control, i'll probably just wire up 6x ls2 coils cause i know how those respond.

as far as resolution on the 12 tooth, i think with ms3 it should be a bit better, given that it's a faster cpu with supposedly some improvements. the ms3 works fine on my sentra going off stock wonky 36-2-2 crank wheel and "number of pulses equals cylinder about to fire" cam wheel

on the slight offtopic, is your holset a variable geometry rig ? i just got an hx40 to go on the sentra, so i'll see how that goes.

Yes my Holset HE351VE is a VGT turbo currently using a actuator to control the vanes which is all right. As of now I am working on a stepper motor control using an Atmel ATmega644 8-bit microcontroller to control the vanes.

[gurov]

Yes my Holset HE351VE is a VGT turbo currently using a actuator to control the vanes which is all right. As of now I am working on a stepper motor control using an Atmel ATmega644 8-bit microcontroller to control the vanes.

neat... depending on the stepper motor style, i guess you could make use of the generic PWM output feature in MS3:



---------- Post added at 04:05 PM ---------- Previous post was at 03:58 PM ----------

i guess while i'm on topic of ms3, here's a few other neat things that i found could be very useful for making life less painful with megasquirt.

[wardog]

Good pics, im gonna try to megasquirt my 88 turbo supra.
1. What is the least espensive way to megasquirt it?
2.What do i need that its not on the 7m engine, sensors etc?
3. Is there a plug and play for the 87-88 supras?

Lmk i was gonna buy another MAFT pro but i guess its time to upgrade from piggy back to full stand alone....

[gennro]

Good pics, im gonna try to megasquirt my 88 turbo supra.
1. What is the least espensive way to megasquirt it?
2.What do i need that its not on the 7m engine, sensors etc?
3. Is there a plug and play for the 87-88 supras?

Lmk i was gonna buy another MAFT pro but i guess its time to upgrade from piggy back to full stand alone....

http://www.supramania.com/forums/sho...squirt-and-You

[Stucknot]

Sorry to post this here, but this thread seems to be the longest and most active about megasquirt.

My question: How have you guys wired up and set up the 2JZ IAC? I've been reading things everywhere and can't find a straight answer. I have a MS2 V3.0.

Thanks in advance.