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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 02-22-2013, 01:40 AM   #1
mkodama
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Question What to build compression ratio to?

How do you determine what the static compression ratio should be when designing and building an engine?
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Old 02-22-2013, 02:08 AM   #2
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My order of operations would be something like:

0. Decide budget.
1. Determine what RPM to make peak power.
2. Find or have a camshaft made that will make peak power at that RPM.
3. Determine what type of fuel will be used find an appropriate dynamic compression ratio to run with that fuel.
4. Use camshaft specs and desired dynamic compression ratio to get the correction static compression ratio.

Thoughts?
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Old 02-24-2013, 02:36 AM   #3
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Old 02-24-2013, 12:09 PM   #4
jared_wiesner
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Sounds like a good way to plan an engine build.... You've got the main points covered
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