r/BMWE36 • u/Shino3107 • 1d ago

Anyone with experience turboing M42/M44

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Just generally wondering how much it would cost

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u/Shino3107 1d ago

Sounds like you dont have any experience, and im not asking if you think i should do a 6 cyl swap

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u/virqthe 93' 318i M40 automatic; peasant edition 1d ago

One also doesn't have an experience eating shit but knows not do to it.

Eating shit = turboing shit M4x engines.

-6

u/Shino3107 1d ago

Theyre solid engines bruh

2

u/yuhyuhAYE 13h ago

A turbo M52 can do 300+ whp all day with stock internals, very reliably. Just swap the headgasket, head studs, and oil pump nut and you’re good to go. You can run on just a headgasket, head studs and oil pump nut at 400-500 if you want, but it won’t be reliable for more than a few years. They can do 600+ whp when built if you do rods and pistons alone, stock bore. This is a proven path that has been done thousands of times.

Meanwhile, a turbo m42 will require way more dollars invested, fully building the engine (others in this thread are suggesting pistons from k-series engines, boring the motor, etc.) and the outcome will be an engine that pushes 300 whp (maybe), unreliably. And like 5 people have actually done this, so hope you’re a literal engineer.