megasquirt II

[mitsukaiSI]

has anyone looked into or thought about using the megasquirt ecu to control the functions of the motor and let the oem ecu control canbus and dbw? im thinking about using megasquirt on my ae86 corolla and i dont see why it wouldnt work on the si as well. . . its alot like haltech and motec but its DIY

[EagleEyez]

for a second there i thought it was a porno

[volvo9]

The RWD volvo guys use it a lot and love it.

I can't see this working though unless you completely replaced the stock ECU, which would mean pretty much gutting the car since everything is run by it. The stock ECU needs to be in control of everything or else it's going to go insane. Without all of the engines sensors connected, it would highly doubt it would even work the throttle properly, nevermind the electric power steering, traction control, and so on.

[daytonaturbo]

I run a MS-2 on my 87 Daytona and am putting another one together to run on my 440/7.2L powered Plymouth Satellite so I can ditch the carb from that one and go to port efi. On those applications the MS-2 works great. For both of them I use them to control fuel and spark. But keep in mind, the Satellite has no computer controls to replace, so installation of it is just as a stand alone unit, and on my Daytona, the computer only controlled the engine and my cruise control. Cruise was cheap/easy enough to by pass from the computer, so no troubles there. But on a new civic, with the engine and body computers running the entire show, the car would probably crap itself if you tried to cut the stock computer out of the show all together.

Plus MS-2 does not work with a drive by wire system, nor can it control variable valve timing, it just does fuel and spark. If you want to run a megasquirt on a civic, the only way you could do it would be to install an extra set of 4 fuel injectors and program the MS unit to only activate those injectors once you start getting into boost. With a wideband 02 sensor, and MS's auto-tuning and datalogging capabilities, the hardest part of the whole deal would be physically adding in 4 additional fuel injectors. So you would have 8 fuel injectors, the 4 stock ones would do all their normal work, but when you hit boost, the other 4 kick in to suppliment the 4 stock injectors, and together all 8 would provide the appropriate amount of fuel during boost.

However, if you wanted to control fuel AND spark, there's no way you could keep the stock computer in the picture and happy. You'd be firing off all kinds of messages to the CEL like crazy. On something like your 80's corolla, the efi controller should still be simple enough that it can be bypassed easily enough. But I think you can tell how much more complicated a modern ECU is and how much more integrated into the functions of the entire car it is. The last thing I would want to do is modify things in such a way as to unintentionally disable safety features of the car, ie air bags, abs, etc etc.

[708CvCSi]

a lot of VW guys use MS...check out the vwvortex.com

[pd0019]

i was thinking the same thing. i have not used megasquirt before but it is huge with ford probe/mx-6 people (i use to own a ford probe). i went a different route in tuning my previous car, supercharged ford probe, but here is a great website with info on it DIYAutoTune.com Megasquirt Kits / Assembled Engine Management Systems, Wideband o2 Sensor Systems and tuning products

[daytonaturbo]

The guys at diyautotune.com are good, I bought my MS-2 and harness from them.

[mitsukaiSI]

they guys that use them on their corollas are able to controle vvt with megasquirt II