Anyone megasquirted a 3Fe?

stereophile33 · 10-22-09, 09:59 PM

anyone ever done this?
Jonathan

ntsqd · 10-23-09, 09:50 AM

Why are you asking? Just for the fun of doing it, or do you have mods in mind that the OE ECU won't support?

Were it me I think that I'd be looking at SDS or possibly even the eec-IV as the bottom end of a high perf application. Not that the MS won't do that, it's just not as smart as other options.
For a simple conversion (like putting a TBI on a 2F) I'd use the MS.

Tofudebeest · 10-23-09, 11:28 AM

I knew some people really liked their FJ62s and early 80-series, but...
[/cytheria joke]

stereophile33 · 10-23-09, 01:39 PM

I've got a wolf kit, electromotive tec 3 kit, motecm800 and MS on the shelf.

I'm starting with MS, because a harness is $80 bucks and it gets the job done for the test. If all works with MS then its worthwhile for me to take the time to get either a wolf or tec 3 kit up and running on the 3Fe in the FJ40.

How does the stock 3Fe ecu know where the crank angle is. Flywheel sensor? Crank sensor?

IrollwithTojo · 10-23-09, 03:00 PM

Quote:

Originally Posted by Tofudebeest

I knew some people really liked their FJ62s and early 80-series, but...
[/cytheria joke]

-Carl

tonkota · 10-23-09, 03:15 PM

I've been wondering this also. I'd like to use a MS to help control fuel easier when I add a turbo. It was just a thought. The main thing I see with the stock ECM is that there is limited support/modification available.

No crank/flywheel sensor.

Moby · 10-23-09, 06:14 PM

Quote:

Originally Posted by tonkota

I've been wondering this also. I'd like to use a MS to help control fuel easier when I add a turbo. It was just a thought. The main thing I see with the stock ECM is that there is limited support/modification available.

No crank/flywheel sensor.

A bit off topic but - a Unichip, Split Second or other add on/piggy back controller is likely going to be a lot simpler than completely ditching the stock ECU. You can also use these to convert to speed density or MAF and ditch the flapper door AFM restriction.

stereophile33 · 10-23-09, 06:52 PM

so how does a 3FE know when to trigger ignition and fuel injectors?
Hall sensor in the disty? Cam trigger? Anything fancy?

ntsqd · 10-23-09, 07:18 PM

The system is basically a Bosch L-Jetronic variant. According to Probst those get their crank position from the ignition system.

RockDoc · 10-23-09, 07:23 PM

Just picked up this book on Bosch fuel injection systems. Bosch Fuel Injection and Engine Management - Charles O. Probst, SAE. 9780837603001 Not far into it yet, but seems like a real good reference. As far as I can tell, the 3FE uses a licensed copy of the Motronic system (L-Jetronic + non-fuel engine management stuff like ignition advance...).