I've done quite a bit of reading on compression ratio both in magazines and on this and other forums. Most things I have read say that you should not go much higher than 10:1 (static ratio) if you want a smooth streetable engine that also runs on 91 or so octane. If you look at a lot of new cars being sold (Audi, BMW....) they have compression ratios of up to 11.5:1. So what gives here. I understand that if you run a more exteme cam you can get away with higher compression ratios but then they dont idle so well.
Not another compression ratio question
in Nissan L6 Forum
Posted
OK, so it is a compression ratio question....
I've done quite a bit of reading on compression ratio both in magazines and on this and other forums. Most things I have read say that you should not go much higher than 10:1 (static ratio) if you want a smooth streetable engine that also runs on 91 or so octane. If you look at a lot of new cars being sold (Audi, BMW....) they have compression ratios of up to 11.5:1. So what gives here. I understand that if you run a more exteme cam you can get away with higher compression ratios but then they dont idle so well.
What am I missing
-C