Hey, I found this site today on a totally customizable Fuel injection system (low cost) DO you think this could actually be feasable?

http://www.bgsoflex.com/megasquirt.html

 

Anything's feasible. I remember a guy invovled with the DIY-EFI project made his Pontiac 6000's stock injection hardware work off of an IBM XT (YES an XT!) with a home-built injector/ignition driver board and the program was written in BASIC.

One of my favorite EFI sites is www.sdsefi.com they don't sell anything that can control our ignition systems, but their fuel-only systems will work just fine. Their extra injector controller is also interesting but the way it's tuned kinda worries me. But hell it's a TON cheaper than the alternatives.

 

WOW.

I'm going to make one of these. Very interesting.

I'll send the link to some electronics geek friends of mine and see what they think.

 

The only thing I seen was it wouldn't work the way they have it with Staged injectors, which 86+ RX-7's use.
But they said it can be adapted with more hardware to work.
The only thing that would worry me, is one of my solder joints going bad and toasting my motor, hehe

Yes, the SDS systems are pretty nice

 

You don't seem to confident on your soldering abilities.

I love soldering. Been doin it since I was 7 or so. Got pretty good at it too. (My mom, to this day still hasn't found the hole in the carpet where I dropped the iron. )

These DIY EFI setups seem interesting. Wonder why they say it can't be made to do TBI?

 

Could be because TBI is such a bitch.

Wait... the MegaSquirt (gotta love it with a name like that) says that it CAN do TBI.

 

hm, so who wants to build me one? I'll convert my -SE to that just so I get to use MAP, I'll keep the Dizzy and ****, but I'd love to get this **** setup. And it seems I can upgrade the MAP chip to support turbo'd apps if I do choose to go that route later on in the car's life...

This seems like an intresting setup... tho I still am waiting to see the Wolf 4d.

--matt

 

TBI would be ideal in converting a carbbed car to FI, wouldn't it?

No worrying about how far up the manifold to drill bungs for the injectors. Don't need to find/make a fuel rail.

Just pull the carb off, put on a throttle body and mount injectors above it pointing down.

I think, or am I way out there? That's how I've seen most TBI cars. (IE. 1986 Mercury Cougar 3.8 V6, 198x (It was 6-9) Chevy Camaro RS 5.0 V8) Everyone looks and on first impression says It's a carburetor cause it's got a round lid on top of the engine. I tell em to pop the lid off the air cleaner and then tell em to explain the injectors sitting there.

It seems pretty simple. TPS, O2 sensor, MAP, and IAT sensors input into the computer that controls the injectors. Well, it seems simpler than a bazillion vacuum lines, valves, needle float doodads, and venturis. To me at least.. Unless I'm missing something.

Simpler than Port injection where you need a crank angle sensor or tap off the ignition system to tell when each cylinder or rotor is on intake cycle. Then further complicate things with a MAF sensor.

The more I read what I just spewed.. the more I think I'm way off.

 

You've almost got it. TBI is alot like port injection except the injectors are located on a single throttle body, instead of on each cyl. / rotor like MPI. For you guys you could just get a Webber 48DOCE (or whatever) throttle body, mount a pair of GSL-SE injectors on it, make a fuel rail, and off you go.

--matt

 

Why would you need a fuel rail on TBI? Just run the fuel line straight to the back of the injector. I think that's how it is on the Cougar... Have to take a look at it sometime.

BTW, What can one do with a 1986 Mercury Cougar with a bad automatic?

 

I guess it depends on how many injectors you have...I've seen TBI setups with multi-injectors... I guess they're more of a hybrid setup..

--matt

 

Jaytech has a nice piece to bolt on the the injector part of the conversion. if you can get ahold of them.

 

Or you can just get the TB which bolts onto any Holley mount.

 

that is extremely cool.

I'm looking into parts for this thing. I can prolly build it for ~$150 - $200. I need to e-mail the guys and see if I can get a few more specs about the pcb and see if I can get it made since I can't etch a board with traces that small.

Anyway, it looks like it might be a pretty cool system. I can't wait to play with this thing :p

--matt

 

Did anybody follow thru on this?

 

Okay, it's been over six years, but I have my MS powered up with jumper wires on the bench at work... and a GSL-SE engine sitting my my '84 GSL...

Took long enough

 

Yeah. I built a MegaSquirt, installed a 20B in my GLC and wired it all up within that time. It even ran well enough to take it around the block a few times.

 

I am running a MS as a standalone in my car and it is working great.