So, I'm no chemist by any means. Since there are a wealth of knowledge on this site related to physics and what not, I decided to start this thread.
So for starters, I know most engines are able to run on the 3 common available octane ratings from the factory. However, some things I've been reading leads me to some questions.
So, correct me if I'm wrong. 87 octane fuel is MORE combustable than 93 octane correct? So, a higher compression engine would have predetonation on a lower octane rating and need to run the higher rating? Which means e-85 and diesel fuel are some of the least combustable and have really high compression pistons to ignite fuel properly.
So, a higher compression engine that is boosted could make the same power on less boost than a similar engine with lower compression, only with less room to work with on timing correct? If this is the case, wouldn't you be able to tune a lower compression car with boost to run on any of the 3 octanes?
Lastly, wouldn't a lower compression (or worn out high mileage engine) running on 87 octane do better with a colder spark plug?
None of these questions are relevant to anything other than just expanding my knowledge base. Just, like to learn about things like this.
p.s. For the record I'm one of the looneys that doesn't always follow what "main stream" science says. So, I believe oil is an abiotic source, if anyone is interested in furthering the conversation in that direction. (even though it usually leads to climate change discussion, and that ALWAYS gets political for some reason)
So for starters, I know most engines are able to run on the 3 common available octane ratings from the factory. However, some things I've been reading leads me to some questions.
So, correct me if I'm wrong. 87 octane fuel is MORE combustable than 93 octane correct? So, a higher compression engine would have predetonation on a lower octane rating and need to run the higher rating? Which means e-85 and diesel fuel are some of the least combustable and have really high compression pistons to ignite fuel properly.
So, a higher compression engine that is boosted could make the same power on less boost than a similar engine with lower compression, only with less room to work with on timing correct? If this is the case, wouldn't you be able to tune a lower compression car with boost to run on any of the 3 octanes?
Lastly, wouldn't a lower compression (or worn out high mileage engine) running on 87 octane do better with a colder spark plug?
None of these questions are relevant to anything other than just expanding my knowledge base. Just, like to learn about things like this.
p.s. For the record I'm one of the looneys that doesn't always follow what "main stream" science says. So, I believe oil is an abiotic source, if anyone is interested in furthering the conversation in that direction. (even though it usually leads to climate change discussion, and that ALWAYS gets political for some reason)