XJ6 & XJ12 Series I, II & III 1968-1992

How hard is a series 3 engine into a series 2 body

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Old Dec 26, 2013 | 10:00 PM
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Default How hard is a series 3 engine into a series 2 body

Just curiously asking here.

Is putting a series 3 engine into a series 2 body difficult? I know it goes from carb to injected but is the swap straight foward. or does it need customising in places if so where and how?

The engine im assuming would bolt straight in but then is it just hook the ecu upto power and run the loom to the engine?
 
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Old Dec 26, 2013 | 10:33 PM
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Default Why bother? not hard, just very time consuming

Its not hard just time consuming. The chassis are basically the same except for the roof line. Very doable if you have a complete series 3 donner. The Series 3 FI ecu is in the trunk and extracting the harness is quite difficult and fidley. Then you'll need to change the tanks to FI tanks and replumb for the FI pump. I wouldnt bother...the XK engine is unreliable and difficult to keep running when it was installed by the good folks at the factory.
 

Last edited by icsamerica; Dec 26, 2013 at 10:36 PM.
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Old Dec 27, 2013 | 12:21 AM
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forgot about the fuel lines and tanks, and thanks was just curious. Think ill pass on that idea. next idea is a lovely 383 stroker twin turbo . . . Seen a series 1 Jaguar with a manual one of those in it. omg i wanted it but didnt have $14k was way way way to cheap for what it was though it was mint.
 
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Old Dec 27, 2013 | 10:39 AM
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There is an inbetween. Or a work around or two.

1. Use the S3 engine and trans. Keep the S3 ignition system. Remove the FI and install the S2 carbs.

2. The ECU need not live in the boot. Install it under the right seat. Shorten the harness. Replumb the return line to avoid a long fun fropm engine bay to boot. Good anyway to transfer fuel at about 36 PSI rather than 100 PSI or so and return the surplus. A tad of ingenuity needed to plumb the return into the tank or tanks. But, yu are doing plumbing there anyway to provide the fuel pump required by the FI. The carb'd style will not do.

As the S3 tank to fuel pump feeds are gravity only, a return could be plumbed in there, I think.

My car is alump and uses almost all the fuel delivery stuff that wass installed at Brownslane. iIt works just fine, so far!!
 
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