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Starting the engine in a makeshift test rig. Aluminum block single vanos M52B28 with M54B30 internals, S50 ITBs and a bit more aggressive cams. Something seems to be wrong with the idle as it starts climbing soon after starting.
EDIT: I noticed a few things were off. The TPS sensor was operating backwards and reading wot at idle because even though the S50 uses the same sensor, it is wired differently. Repinning the connector got that sorted. Also, the O2 sensors were not heating up because they were right at the end of open headers. That was fixed by bolting the exhaust in place. With those sorted out the idle was stable enough to do the vacuum syncing of the ITBs. After that the idle was pretty nice and smooth but a little high at 1300 rpm. I suspect that's because the bypass needles allow more air through than the ecu is expecting and it reaches the limit of ICV adjustment. But I'll see where the idle settles once the engine is in the car and there's more load on alternator etc. At the moment I've painted the underside and the imside of the car and assembled the suspension. The car is heading to be painted and I plan to have it running and driving next summer.
• Let me sing you the so...
Here's pics of the engine build progress:
anttikarppinen...
And here's a build thread for the whole car:
www.r3vlimited...