No doubt this has been done before, just showing how I went about it.
Series one S14 with 200k km SR20, owner got sick of the brown note so we railroaded him into a 1JZ VVt from a JZX100 that we had in stock and wanted to get rid of. It's a manual engine originally but had no box so we got a JZA70 box for it. Pulled the SR and threw it in the alloy bin, dropped the 1JZ in to have a look. Needed some sump reshaping and a little tunnel manipulation to fit the nugget gearbox. That done it slipped in and was chocked and leveled ready to make mounts for.
I chose to retain the alloy engine brackets and fitted them with Patrol engine mounts which were then adapted to the crossmember with some fabricated brackets.
Gearbox mount was also fabricated from flat plate and angle. Don't have a direct pic of it but it can be seen in one of the exhaust shots.
The exhaust is 3" mild steel from turbo dump back. I routed the exhaust under the rear of the sump to swap side as there is no provision for exhaust or cat on the RH floorpan.
Single 100 cpi cat and stainless dual outlet muffler.
The wiring is the usual strip and splice job. The S14 engine harness has the abs and wiper wiring integrated so it can't just be unplugged and forgotten.
The original ricey front mount piping was chopped up and welded back together to make up the IC piping. Also chopped the turbo outlet cast pipe and shortened/reshaped it while at the same time deleting the odd ecu controlled bypass valve arrangement. Engine cooling is a china radiator with subaru cooling fans controlled by a TFS106 fan switch on one circuit and switched by the A/C compressor on the other circuit.
Runs nicely and goes as expected.
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