Quote:
Originally Posted by Downeaster1
I posted this over on 1addicts as this mostly pertains to the E82:
If you are planning on doing the swap, a few things have to be addressed. Firstly, steering. The subframe mounting can stay the same, but if you are planning on keeping the OEM plumbing for the turbos, it won't work. The rear turbo inlet will hit the frame, so custom fabrication is required. Secondly, the top-mounted heat exchanger won't clear the factory hood. It will either be necessary to have an aftermarket hood, or seek alternative cooling solutions (such as the typical front mounted intercooler with the secondary cooling system deleted). Then there is the steering. The location to bolt a power steering pump to the S55 interestingly enough exists, thus making either a swap to an existing F80/F82 possible, or a swap of the S55 into an older hydraulic steering vehicle less complicated. A "crossover" module for PT-CAN information will have to be installed and coded to intercept the bus information to convert to the older style cluster and FRM. Dynamic shifting has to be coded off, otherwise every time you go to downshift, it will redline the engine due to the transmission not having individual gear sensors. DSC will also need to be tweaked for different power input. There are other small physical compatibly issues, as well electrical/coding hurdles, but that's the basics of it.
Also, You also have to double up the fuel feed lines and put in a T connection with a fuel line suitable for low pressure. The S55 has two high pressure fuel pumps that need equal feed pressure. In terms of cooling, the heat exchanger coolant reservoir must be relocated to the drivers side (instead of in the back) to clear the hood properly. If anyone has any more questions, feel free to message me.
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Sounds like a weekend project.