You need an oil cooler and lines. You can use an aftermarket oil cooler, AN-to-S54 oil filter housing adapters (like the ones VAC sells), and AN hose and fittings, or you can retrofit a BMW cooler if you already have one. However, the stock M20/S14 oil cooler is fairly small and would be fine on a street car, but if you plan on tracking it, the cooler is too small.
Connecting rods aren't something you can replace unless you disassemble the engine. I would suggest getting some new rod bearings and ARP rod bolts and reusing the stock rods.
With a ZF transmission, you'll also want a ZF driveshaft from an E36 328i or 97+ E36 M3. You also need an M3 flex disc, six M3 flex disc bolts and locknuts.
The 24V swap booster won't fit with the S54 air plenum. I used manual brakes. This probably isn't ideal, but it works fine for my needs.
Stewart, as far as I know, does not manufacture an S54 water pump.
To retrofit the S54 fuel pump onto the E30 pump frame, you'll need some 5/16" SAE 30R10 (submersible) fuel line. It is pricey but it also won't get crispy and fail like lesser fuel hose.
You will need some kind of cooler line for the power steering fluid, something like an E30 325iX power steering cooling loop. It's a piece of metal tubing that mounts to the radiator support, and has two hydraulic hoses leading to it from the power steering system.
You have a decent list. This isn't an insurmountable task. If you consider that you might have a ton of knickknacks like oil pan bolts, or driveshaft locknuts, then sure, you can easily get up to an individual part count of 250. However, sweat the big stuff first and the details will follow. Think about things in systems, like with the exhaust. To install an exhaust, you'll need a bunch of gaskets, locknuts, and stuff like that. For example:
Exhaust. You will need non-US exhaust headers, as the US headers/catalytic converters are far to bulky to fit into the E30. In my opinion one of the better options are stock European S54 exhaust headers. They are well built and have good fitment, which reduces frustration. Along with the headers, you'll need 6 upper triangular exhaust flange gaskets, 18 7mm copper locknuts. If you get Ebay headers you will need longer exhaust studs.
Connecting rods aren't something you can replace unless you disassemble the engine. I would suggest getting some new rod bearings and ARP rod bolts and reusing the stock rods.
With a ZF transmission, you'll also want a ZF driveshaft from an E36 328i or 97+ E36 M3. You also need an M3 flex disc, six M3 flex disc bolts and locknuts.
The 24V swap booster won't fit with the S54 air plenum. I used manual brakes. This probably isn't ideal, but it works fine for my needs.
Stewart, as far as I know, does not manufacture an S54 water pump.
To retrofit the S54 fuel pump onto the E30 pump frame, you'll need some 5/16" SAE 30R10 (submersible) fuel line. It is pricey but it also won't get crispy and fail like lesser fuel hose.
You will need some kind of cooler line for the power steering fluid, something like an E30 325iX power steering cooling loop. It's a piece of metal tubing that mounts to the radiator support, and has two hydraulic hoses leading to it from the power steering system.
You have a decent list. This isn't an insurmountable task. If you consider that you might have a ton of knickknacks like oil pan bolts, or driveshaft locknuts, then sure, you can easily get up to an individual part count of 250. However, sweat the big stuff first and the details will follow. Think about things in systems, like with the exhaust. To install an exhaust, you'll need a bunch of gaskets, locknuts, and stuff like that. For example:
Exhaust. You will need non-US exhaust headers, as the US headers/catalytic converters are far to bulky to fit into the E30. In my opinion one of the better options are stock European S54 exhaust headers. They are well built and have good fitment, which reduces frustration. Along with the headers, you'll need 6 upper triangular exhaust flange gaskets, 18 7mm copper locknuts. If you get Ebay headers you will need longer exhaust studs.
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