Porsche Engine Internals
Copyright © 2007 Eric Fahlgren
Last updated 2008-01-03 06:40 PST
This is a list of internal dimensions for the various watercooled flat-six engines. It is intended to help people who wish to swap parts between motors.
| Engine Key | |||
| Tag | Description | Power (HP) | Torque (lb-ft) |
|---|---|---|---|
| M96/01 | 996 Carrera 3.4 | 300@6800 | 259@4600 |
| M96/01S | 996 Carrera 3.4X51 (non-US according to factory manual) | 320@6600 | 266@5000 |
| M96/20 | 986 Boxster 2.5 | 201@6000 | 181@4500 |
| M96/21 | 986 Boxster 3.2 S | 248@6250 | 226@4500 |
| M96/22 | 986 Boxster 2.7 | 217@6400 | 192@4750 |
| Dimensions | ||||||||||
| Tag | Bore | Stroke | Disp | Rod Journal | Rod Length | Wrist Pin | Compression Height | Piston Dish | Block Height | CR |
|---|---|---|---|---|---|---|---|---|---|---|
| M96/01 | 96.0 | 78.0 | 3387 | ? | ? | ? | ? | ? | ? | 11.3:1 |
| M96/01S | 96.0 | 78.0 | 3387 | ? | ? | ? | ? | ? | ? | 11.3:1 |
| M96/20 | 85.5 | 72.0 | 2480 | ? | ? | ? | ? | ? | ? | 11.0:1 |
| M96/21 | 93.0 | 78.0 | 3179 | ? | ? | ? | ? | ? | ? | 11.0:1 |
| M96/22 | 85.5 | 78.0 | 2687 | ? | ? | ? | ? | ? | ? | 11.0:1 |
Yellow entries are not confirmed, but calculated from guesses. Red entries are unknown. If you know or can confirm any of these numbers, e-mail me, do it now before you forget.
03 JAN 2008 - EF first pass with data from Porsche factory manuals.