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The BMW Range
3 Series
E46
ron 95 or ron 97
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<blockquote data-quote="ALBundy" data-source="post: 488589" data-attributes="member: 15"><p>So what's your point le? </p><p></p><p>My point is,</p><p></p><p>1) you can't simply compares static compression of na and forced induction engines as I have explained why earlier</p><p></p><p>2) 10.2 is not considered high and neither have I said is low. It was you that implied it is high since the tfsi engine also has similar static compression. Again for forced induction cars, the yardstick is effective compression ratio which is a combination of static compression and boost pressure. A turbo car with high boost pressure can easily have a higher effective compression than the Mazda ActiveG you mentioned.</p><p>For NA engines, anything above 11 is considered high and below 10 is low nowadays. In between is pretty much what you have in most cars on the road. </p><p></p><p>It will be good for everyone to read more on the various compression ratios before modding their engines.</p></blockquote><p></p>
[QUOTE="ALBundy, post: 488589, member: 15"] So what's your point le? My point is, 1) you can't simply compares static compression of na and forced induction engines as I have explained why earlier 2) 10.2 is not considered high and neither have I said is low. It was you that implied it is high since the tfsi engine also has similar static compression. Again for forced induction cars, the yardstick is effective compression ratio which is a combination of static compression and boost pressure. A turbo car with high boost pressure can easily have a higher effective compression than the Mazda ActiveG you mentioned. For NA engines, anything above 11 is considered high and below 10 is low nowadays. In between is pretty much what you have in most cars on the road. It will be good for everyone to read more on the various compression ratios before modding their engines. [/QUOTE]
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