Megasquirt Tuning

[Klinenator]

Anyone know where i can find values for all of these?


Calculated Required Fuel - One cylinder(ms)

Injector Characteristics:

Injector opening time -
Battery voltage correction -
PWM current limit(%) -
PWM Time threshold(ms)-

Fast idle Control:
Fast idle threshold(*F)-

Correction Factors:
Barometric correction - (on/off)

Injector Control:
Control Algorithm - (Speed density/Alpha-N)
Injections per engine cycle (1-8)
Injector Staging -(simultaneous/alternating)
Engine stroke - (four stroke/two stroke)
Number of cylinders - (1-16)
Injector port type -(port/throttle body)
Injectors - (1-16)
Map type - (125Kpa/250Kpa)
Engine fire - (Even fire/Odd fire)

[keithmac]

MegaTune should work out your req-fuel for you,

Injector opening time - leave as default
Battery voltage correction - leave as default

PWM current limit(%) -
PWM Time threshold(ms)- These depend if you`re running low impedance injectors, if you`re running the TT injectors and resistor pack the current limit would be 100% and time threshold 25.5ms.

You want baro correction on.

The rest are engine specific, I run 2 injections per cycle on my other car and it`s smooth enough, you need to do some good reading up because f you don`t know what to put in here you`ll be lost when it comes to setting the rest up.

[Klinenator]

Thanks for the answers. Where can i do some good reading?

[keithmac]

Mega Manual

That`s your first bit of reading, read the lot to get an idea of what`s what.

What version of MS are you running?.

[Klinenator]

MSI v2.2

[Gruff Male]

Are you guys getting a good tach signal? I've got alot of it hooked up with good readings on all sensors, just need to calibrate the coolant and air temp ones, but my tach signal is about 400 rpms than what my SAFC and tach are saying.

[Klinenator]

What settings do i have to know before i can put the MS into my car. Fuel only no timing yet.

[John Monnin]

Anyone actually running Megasquirt on a 3S yet?

[markoverclock]

Originally Posted by John Monnin

Anyone actually running Megasquirt on a 3S yet?

if my computer wont clean up the 2500 rpm hesitation. i will be

[keithmac]

My other car ran on the stock setup and I tuned (carefully) from there. If you`re getting a correct tach signal (rpm) you should be able to run fuel only out of the box.

I`ve been mulling over it for fuel and Water Injection control with boost limiting, got pretty good at coding the MS1`s for the simple stuff. You can run full time closed loop o2 correction with a target table and it works very well.

Heven`t heard anyone`s managed to decode the CAS signal to run sparks, but someone may have by now?.