Throttle body size? - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

 
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#1 (permalink) Old 04-27-2004, 04:51 PM
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Can anyone tell me what size the 1.9L m44 throttle body is, and will a larger throttle body from another BMW bolt up? If not I would like to know the size so I can get mine bored out and use a plate from another vehicle.
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#2 (permalink) Old 04-27-2004, 05:52 PM
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The stock larger plate size is 52mm, the smaller plate I have no idea. No other throttle bodies from any other BMW will fit the M44. M42/M44 is the only TB which is dual stage (consists of 2 throttle body plates, not 1 like regular ones). There's no point in swapping throttle bodies. Just bore out your current one and have a larger butterfly plate installed. Universal butterflies will NOT work. You'll have to get one custom made.

I suggest 52 => 54mm or 55.5mm (so +2 or +3.5)

I had mine increase 3.5mm larger. Leave the smaller plate alone. It's good to have that plate there for some low end torque.

Bry

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#3 (permalink) Old 04-27-2004, 07:35 PM
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Thanks for the info. I might get a extra TB soon to mess with.
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