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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 01-22-2011, 02:44 AM   #1
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M52TU pistons

Does anyone know the differences between M52TUB25 and M52TUB28 pistons? I thought I read somewhere the only difference was the b28 pistons got a graphite coating that the b25 pistons did not, and were otherwise identical in terms of dimensions.

Reason I'm asking is I got a great deal on a 23k mile B25 motor, and have a line on B28 crank/rods locally for cheap. Thought I'd drop them in my B25 and have a cheap little stroker, but was wondering if I'd have any problems with pistons.

This is all going into one of my e30's. Thanks!
1992 Porsche 911 Carrera 2 blk/blk 5-speed
1989 E30 M3 Euro S50B32/6-speed :D

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Old 01-26-2011, 02:38 PM   #2
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I THINK the M52TU28 has FORGED pistons. While the M52TU25 has Cast iron pistons.

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