225 W/Pro-jection

I will when I'm off tommorrow look into what it will take to make a crank sensor bracket and look at some crank sensors from a friend of mines S10 pickup and see what I can do. I will also call to a friends junkyard and see if there are any TBI units that can be used for cheap. Get back to you in a couple of days.

 

I might be interested in trying to make something work if the price is right on the parts. They don't have much of that kind of stuff here locally in the Junkyards. :evil: Makes it hard to retro-fit old rigs if all you have is old parts to swap on.

 

A member on this board has done this, steverdenver. I traded some emails with him in the past researching the possibility of doing this. The one issue I counld not get past was what steve calls a "black box" that takes the crank trigger signal and converts it into something that the computer can understand. Maybe steve can chime in hear with his knowledge.

Scott

 

This sounds very intresting.. Im more intrested in swapping on stock TBI parts.. cuz it'll be cheaper and you can get the stuff from the junkyard.

Does this mean.. it'll be distributor-less ? Kewl but, I like my HEI.. So, it'll have a coil pack 3 or 6 ? gap the plugs to .060 ? What about a knock sensor ? So it'll run the timing advance just right ? O2 sensor will be easy.. Throttle posistion sensor.. will it require that stuff ? water temp sensor, etc ?

Ok, I'm intrested.. count me in

 

IIRC, Stever had a chip specially burned for his setup for one reason or another. The way I hope to do it shouldn't require that. The guy I know did it exactly like we are talking about here and used nothing but GM parts with the exception of the crank sensor and the homemade bracket. I do seem to think the sensor used for the crank was a Chrysler VSS or something similar though. I'll give him a call to see what he says.

 

Found this link while at work tonight. Think one of us needs to call them and play 20 questions and see how special this kit really is and if it is very easy to build on our own based on the the answers we get from them.

http://www.affordable-fuel-injection.com/off-road.htm

 

Mcruff,

Affordable was who steve worked with on his setup. They did create a kit but the cost was somewhere around $1000.00. The setup that steve ended up with was the basis behind the affordable kit.

 

Have you guys considered the DIY MegaSquirt controller (http://www.bgsoflex.com/megasquirt.html)? There's also a Yahoo group. It's cheap and fully programmable. I'm also into Datsun ZCars, and there are several people on a forum I belong to that are running this on both N/A and turbo cars and are quite pleased with the system. I'm an electrical engineer and am willing to help if we need any custom circuitry. I think EFI on the Dauntless would be great!

Mark

 

In my opinion, $1000 is not affordable, for me anyway. If I go the whole engine swap route, I'm going Vortec 4.3 rahter than TBI though.

 

Yeah $1000 to me is not affordable :? I would think that if it could be done for under 5-600 then that would be good. Heck the local paper had a 98 4.3 with computer and tranny for $800

 

Well, I checked out affordable's website.. and the FAQ.. and i learned a few things

TBI systems include:

TBI unit, ECM with specially calibrated chip, custom built wiring harness, external electric fuel pump, fuel pump relay, coolant sensor, MAP sensor and O2 sensor.

So, is this what we are looking at for TBI conversion on the :v6: ?

We'll just use the 4.3 ECM and hardness.. and the sensors.

As for the crank sensor.. i dont see why we'll need that. Cant you just use the "tach" plug from the HEI dist to provide engien RPM to the ECM ? I read on affordable's FAQ, that they use this in some cases.. and some cases not..

 

In a word, no. The tach signal on the odd fire engine will not work because the ignition does not fire in evenly spaced intervals. Because of this, the ECM can't calculate the engine speed. This is not a problem with even fire engines. On an even fire 231, you could use the tach (aka RPM) signal. The ECM looks at the time between the ignition events to determine engine speed.

mruta

 

Guys I wasn't going to even consider buying one from them, (remember me and a Jew invented copper wire fighting over a penny), I would never spend that kind of money on something like that, just call them, sound interested and play 20 questions to get a little info on there design, to build and or work out the bugs on our setup is all I was after.
I have a friend of mine who did something similar to what we are doing and instead of using a magnetic crank trigger he used a photo eye to pulse off of the timing mark on the front of the engine and he said it worked fine.
The crank trigger or photo eye is the only way you are going to get an even pulse for the computers RPM needs, this is very simple to build as far as I can tell.

 

I'm assuming that the odd-fire has an asymmetry between the odd and even pulses? It'd be easy to drop every other tach pulse (and keep the evenly spaced even or odd pulses) but synthesizing the dropped in-between pulse would be trickier. Certainly with enough circuitry you could make something that would extrapolate the dropped pulses. Potential PITA IMO.

It might be easier to simply build a crank sensor from a flywheel or crank pulley/balancer and scrounged parts.

 

I would recommend using a magnetic trigger if you pursue this. The optical pickups are too susceptible to interruptions due to dust, water, mud, etc. Have had similar problems with aftermarket distributors that use the same set up. Nickmil.

 

WOW! After reading all this, the old 2G looks REAL GOOD!