Finally... After about a billizon hours of troubleshooting, I've come up with a tested plug and play system that works with stock toyota wiring.

Basically I create a harness out of a "core" ECU and integrate it to megasquirt. It's +1 wire (02 heat ground) and needs a vacuum line from the intake. With the kick panel removed, I can swap in in and out in under 1 minute.




For those of you who are not familiar with it, it's a completely programmable ECU. It allows you to changing the timing curve, the fuel map, acceleration costants, warm up enrichment, basically anything you'd ever want to play with in the land of EFI.

If you have a *significantly* modified motor, this is the way to go.
If you've got a turbo or supercharger - this is the *only* way to go.

Lightly modified motors - go spend money elsewhere, unless you really want to be able to tweek everything!

This is a budget replacement for a system like SDS or FAST, both of which run over $1500.

Cost? Around $350 for the DIYer.. I'm not selling the units, I'll refer to a vendor. I'm working on a source of them that should cost around $300, but to date no one has built them to my satisfaction.

These can come pre-tuned and plug and play!






[non-22re advance table removed, as I don't want to confuse anyone]

ive been researching it off and on and i may do it on my 84 when i swap to efi. but id like to see pics and more details on your install. from what im understanding you can pretty much use the stock sensors. did you get the spark controller too?

Congratulation on your hard work.



That me, I've been interested in megasquirt for a long time but never had the time to invest in the set up.

Frank

I'm really interested in MS for my 3.0, getting the maps is I think way beyond both me and my budget.

VERY nice. can you get real time data as shown with a laptop? Can you switch programs on the fly? Im putting a stock 22RTE in a 94 PU, I have the stock turbo ECU but I wonder if I could coax a bit more out of it with a system like this. Im putting a similar system in my Mustang with a fold out in dash touch screen
JG

Congrats, Darin -- great job!

Out of curiosity, does the MS handle a WBO2, and does it allow for realtime WBO2 air/fuel correction? The ability to run in closed loop mode at WOT was the feature that really sold me on the FAST unit.

-Jeff

I'll go through these one at a time:



Go to www.22returbo.net, click on "22re custom EFI". There's a how-to guide at the top of the page.
Let me know if you have specific questions.




This was the whole point of this "project". I've got a motor ready to go in that won't use stock sensors, but I wanted to prove that it could be done "plug and play". The only additional sensor is a MAP sensor (manifold absolute pressure) which comes with megasquirt. It needs a vacuum line to function.


The hardest part about megasquirt integration is spark.
This version of MS uses electronics that produce a signal like the stock ECU... Basically it has built-in spark control of the factory ignitor, only you can control the complete timing map. This means you can set the timing at any point in the RPM/load curve - not just a static increase in timing.




I believe the 3.0L uses VAST (ignition type) also. I've seen references to one successful project with the 3.0L. Generally the fuel and timing maps are pretty close between vehicles. It can be done...



Yes, real time data display. You can define which "gauges" you want to show in the display. It can datalog and do real time display.. Basically do a lot more than you can keep up with while using the software.
There is also a "pocket" display available - called "megaview". I've never used it.
I'd highly recommend this for the 22RTE, especially if you go to a slightly larger turbo like CT26 or t3.
Note, the 22RTE pin out is slightly different and I don't have a base fuel map for it.. Additional tuning would be required. My turbo truck tuning will be very different from the 22RTE.





Yes, there is "official" support of several widebands. It allows for realtime 02 correction - both narrowband and wideband. With wideband, you can tune to a specific air/fuel, just like FAST. Basically you come up with a fuel map that is close and the system can auto-correct to get the right air/fuel. Logging allows map correction after the fact. I've swiped your A/F targets for my turbo project and I'm hoping they'll help... The functionality between FAST and megasquirt looks very similiar.

Can you point me to that person? I looked all over the net and couldn't find anyone.

Try this post:
http://www.msefi.com/viewtopic.php?p=122123

very nice.
it's good to somone pushing these motors in a new direction while documenting it online <img src="/forums/images/graemlins/cheers.gif" alt="" />