well i have finally completed a project that i have been researching and slowly making progress on for atleast 2-3yrs....
some years ago i wondered about a better fuel injection system for the 202 than the current VK injection.
the vk injection works fine on a modified motor however due to its primative nature its very limited in what it controls (fuel only) and its not very adjustable.
so after hearing that a delco (i.e. vn commodore) computer and injection setup is what was needed i started researching how it was to work, biggest hurdles being the crank angle sensor and the throttle body.
so issue one, vk throttle body doesn't have the right sensors on it that the delco needs, people have adapted the sensors to it etc but i thought a better option was to get a vn throttle body flange grated onto my vk manifold... so thats what i did.
so with that sorted and some holes filled and re-taped to suit vn sensors the manifold was ready to go.... which brought me to the crank angle sensor....
initially i thought a trigger on the flywheel was going to be a doable option, or holes in the flex plate etc but as it turns out while trying to get more information from Kalmaker on this setup i was advised that the best option would be to source a wiring loom from a JE Camira as these ran the delco computer and were pretty much the same setup but with a dizzy as the crank trigger and a computer controlled ignition module and coil...
beauty, so i got these new and proceeded to fit them to the blue 202 dizzy and motor ...
so first thing to do was to lock ALL the advance in the dizzy which meant dismantling it and welding the shafts together etc and removing all the weights and springs ... once that was done the only other thing needed was to connect the pickup coil in the dizzy to the camira ignition module...
as you can see here the camira module is mounted on the bottom of the dizzy and the wires go up into the area where the old eletronic module was and connect to the two wires inside it.
so after that i made a bracket to hold the camira coil in the same spot as the normal 202 coil would go and slightly modified the wiring loom to have the coil and ignition module connected to it....
the only need for mods was because i could not find a camira loom anywhere so i just modified the vn v6 loom i already had.
you can also see in the above pic the oil pressure switch fits perfectly into the 202 oil pressure port, this is used to cut the fuel pump if there is no oil pressure.
so pretty much once i got all that done the loom was ready and all i needed to do was to wire the connector plugs up to some relays and it would be ready to start ...
this is the little test board i came up with ... dad had to make the comment when he saw this in the engine bay "i hope your going to laquer that!"
so with that done i was able to turn the bottom of the dizzy and get the spark plugs zapping ...
from there this motor was put into the gemini (for that project it was going to be anyways) and used as my test bed ... to my amazement after modifying the computer to have the right crank reference angle the engine fired first go and ran (albiet VERY roughly)
so i spent a fair bit of time in the shed with the laptop and datalogging and tuning the gemini motor to get it as good as i could before then transferring the efi onto the torana.
before
after
please note there is some wiring to clean up still
so aside from the slightly different look of it all, there is also this main difference .... the air flow meter on the vk system in my opinion was a bit of a restriction ... this picture shows the different in intake pipe size - it has to help!
so straight away once i had tuned it roughly (was really rich at wide open throttle) it was obvious that it was going better than the vk injection.
its only early days yet as i've only driven to work yesterday and today with it, but it does appear to be getting atleast as good economy if not better, a few full tanks will tell that tale.... but if nothing else its nicer to drive and FAR FAR FAR more adjustable and the fact that it controls the spark and the fuel means that its going to be a much more efficient package.
another small benefit of this computer is it controls the lockup of the torque converter in the T700 which i am currently doing with a vaccum switch and a mod to the wiring in the gearbox, so this will make it that much nicer again!
i have some videos of it first running and a few 0-100 runs if anyone wants to see them let me know and i'll give you the link, some are pretty big files though.
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