Quote:
Originally Posted by atsik
So... I know that engine is more efficient, but how about fuel consumption?
66kw car burns 7l/100km(90km/h) or 100kw car burns 7l/100km(90km/h)
- both are wasting same amount fuel....
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fuel consumption should go down as you will only need to use less throttle for same power as older engine . That's as long as fuel octane is good enough for the raised CR as the above poster said .
Now does your engine (any version) come with 10.5 , How are you raising it, by thinner head gasket, different pistons, different head .
You might have to alter the ignition timing curve but from 9.8 to 10.5 is only 0.7 of a CR, and I think you be fine but you need to test for any pinging or pull back in timing if you have knock sensor .