Mechanical fuel injection

[Volodya]

Hi everyone, I'm doing the 4g64 with 63 head swap and turbo. It will be going in my Mitsubishi Triton (I believe yall call them Mighty Maxes). I was wondering if there is any way around an ECU, ideally I don't want one, yes they are better but I like my things to be mechanical. So I was wondering if its possible to control the air fuel ratio mechanically, I've found a work around for ignition timing and if heard there are ways around air fuel without a new ECU. Again i know ECU is the best way but I at least want to know my options before I continue to move forward.

 

[dwb]

Carburetor?
You should talk to the builder of this: https://www.dsmtuners.com/threads/another-interesting-4g-car-for-sale-rwd-carb’d-4g63.548205/

 

[bastarddsm]

Blow through carb would work, but seems as if they have problems getting the fueling right with such a jeykl and hyde deal as these at high boost. Hilborn used to make some pressure valve deals for MFI. Best used with methanol though as again the fuel curve is hard to get right and Methanol is very tolerant of being way rich.

 

[pauleyman]

Gotta ask, why is this even a consideration? In this day and age the pros so far outweigh the cons i don't see why you would try. I'm assuming the car already has an ecu? If so most of the work is already done for you.

 

[BLACK'98DSM]

There's plenty of ways to modify a carburetor for boost. But I personally don't think that any ECU controlling an old 4g64 will find a way to overtake the world.

 

[jed344]

I have never tried on this platform. The times i have played with blow through carb's on boosted applications it has always been difficult to say the least. They can work but always had some quirks that we were not happy with.
Personally if someone is planning to run a turbo i think fuel injection is always the answer.

 

[Volodya]

Gotta ask, why is this even a consideration? In this day and age the pros so far outweigh the cons i don't see why you would try. I'm assuming the car already has an ecu? If so most of the work is already done for you.

I definitely have to do nore research on ecus, my current understanding is that piggybacks dont work long term as the ecu learns the trickery and adjusts itself. Which means its either full standalone or mechanical, and i can fix mechanical, i dont know how to work with ecus and what all the numbers would mean. And i want to able to fix any problem on my car. Has anyone heard of attaching a fuel pressure regulator to the boost line so fuel goes up with boost at 1:1? I read about it a bit ago but couldnt find much information.

 

[steve]

Has anyone heard of attaching a fuel pressure regulator to the boost line so fuel goes up with boost at 1:1? I read about it a bit ago but couldnt find much information.

That's a standard feature on a DSM. The FPR must track the manifold pressure 1:1 so that the injector output is constant across the changing manifold pressures from vacuum to full boost.

Also look into [DSM,ECM]Link. It's third party software for a DSM ECU that give the user control over the factory ECU.

 

[pauleyman]

I definitely have to do nore research on ecus, my current understanding is that piggybacks dont work long term as the ecu learns the trickery and adjusts itself. Which means its either full standalone or mechanical, and i can fix mechanical,

I didn't see steve beat me to it but I'll leave this post anyway.

Not completely correct. "Piggyback" has limitations but not as you describe.. Many of us run ECMlink. I wouldnt consider it a piggyback.

i dont know how to work with ecus and what all the numbers would mean. And i want to able to fix any problem on my car. Has anyone heard of attaching a fuel pressure regulator to the boost line so fuel goes up with boost at 1:1? I read about it a bit ago but couldnt find much information.

That is how fuel is set up oem from the factory. Many of us run aftermarket pressure regulators to increase volume capacity and have adjustability.
Quite frankly it isn't a subject needing investigating, it's how it has to be done and every one of us do it even on a bone stock car.
What I was getting at on work already being done is if your triton is already fuel injected it already has a harness. It would just need to modified some and an ecu procured setup to run what you are planning (4g63 turbo ecu)