I'm in the process of installing a V-12 from a '96 Jaguar XJ12 into my '84 XJS.
The XJS 5.3 is completely original.
AFIK the '96 XJ12 is the only production V-12 to utilize both EDIS and a Nippondenso EMS.
Both Philip and Ross' have been very successful in installing MS into their XJS' and the info that I've read from both has been very helpful (overwhelming positive) in my decision to go with MS.
Unlike Ross, I am going to utilize MS for both fuel and ignition, as my '96 is already set up for EDIS (I considered retro-fitting a Marelli ignition control, though the block does not have the provisions to drive a distributor (drive gear, jack-shaft, etc..) and it's obvious that the MS will do a much better job of managing the demands of the 6.0 ignition system.
I have a spare (and complete) '91 Marelli 5.3 and I also have the original Lucas Digital P 5.3 (w/upgraded 16CU ECU) presently running in the car.
Comparing both the Lucas and the Marelli to the Nippondenso systems the obvious differences are 1). The 6.0 Nippondenso has no distributor (as noted above) and in its place are two EDIS coil packs, 2). The Denso receives it's engine speed and cam position from sensors mounted on the flywheel and the A-bank camshaft, respectively. and 3), The Denso utilizes (2) IAC (Idle Air Control Valves (stepper type); One for the A-bank, and one for B-bank (both IAC's also have coolant pipes running into them), though I could run a standard 5.3 IAC cross-over pipe, thereby eliminating one of the IAC's, if necessary. 4), both a A bank and B bank have a individual MAP sensor on each intake manifold. The '96 also has a electro-pressure sensor on the power-steering hose to assist in low speed/RPM idle stabilization.
I will be converting to a TH700R4 (and possibly going to a 4L80E in the future).
With all of that in mind, what MS components (Already assembled) would you suggest to get started? MSII with ? I'll most likely buy the MS relay board in order to keep my time in wiring/soldering, and frying something really important to a minimum. I have everything from the '96 motor (wiring harness, sensors, injectors, coil packs, etc..) as well as the JHTD parts and service manuals for both the '84 XJS and the '96 XJ12. I can provide whatever OEM Jaguar parts and information needed
Your suggestions and assistance will be greatly appreciated, and I especially look forward to hearing from Philip and Ross!
Thanks in advance, and Best regards,
Chad
San Diego, CA
Note: I work in the auto-recycling industry and can acquire ANY OEM part for practically any car (Especially Jaguar) at little to no cost to me (this helps when doing experimental R&D
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