I have to ask the question 98 % of all subi conversions are done with the oem one with expense of shortening running into problems with key fobs why dont most go into a programmable computer instead with adjustablity and less hassle or is there something im missing does the law frown on it or something like to hear your views

Hi

To legally register a conversion you would most likely need to use a stock ECU. I started of with a stock ECU, then I went to a plug n play Autronic, now I'm using a stand alone Adaptronic 1280, in hindsight I wish that I went to Haltech plug n play unit. I was able to wire up about 80% of my harness but some things like variable cam timing, cam and crank angle sensors I left to an expert.

There is also more tuning time requited for a stand alone ECU. The stock ECU has some pretty cool features as well. I went stand alone so that I could run a flex fuel sensor for E85 & 98

Steve

The expense of shortening a wiring loom is between $250-550 for a professional job compared to a couple of thousand for an aftermarket ECU + $$$$ for Dyno time?

this is the thing i have a motor but no ecu no loom only motor loom think between time and expensive of buying them 2nd hand it would be a better option just to wire in a after market unit and get a better state of tune as well

What motor do you have?

If it's a standard motor, you won't get a better state of tune with an aftermarket ECU.

My first conversion I went with a Wolf 3d computer. Wiring was straight forward but it needed tuning on the dyno. 8 hrs to get it right as it needed a few bits and cost $1200. The last few conversions I have run standard ecu and power results, fuel economy and reliability have been better than aftermarket ecu.

have a subi ej20 n/a no, only engine harness no computer nor do i have ecu harness

Talk to Al Butler at Sunspares in Brisbane, he might be able to source a loom and modify it for you