Higher compression low octane
#1
Higher compression low octane
So I'm thinking about a higher compression kit of 10 to 1 for my ultra but am concerned about the lower octane in some states. I plan on touring a lot and would like the extra power but am worried about running lower octane like 87 in a higher compression engine.
Will lower octane be even more noticeable in a higher compression engine?
Will lower octane be even more noticeable in a higher compression engine?
#2
octane is the fuel's ability to resist ignition...like compression ignition "dieseling".
this is why hi comp motors require high octane fuel, so that the fuel burns at the correct time, at the correct rate- if the fuel should self ignite while the piston is coming up...it'll try to push the piston down...backwards.
bad
you could carry octane boost with you and become a scientist at the roadside
mike
this is why hi comp motors require high octane fuel, so that the fuel burns at the correct time, at the correct rate- if the fuel should self ignite while the piston is coming up...it'll try to push the piston down...backwards.
bad
you could carry octane boost with you and become a scientist at the roadside
mike
Last edited by mkguitar; 10-02-2012 at 02:47 PM.
#3
Static compression is but one consideration, and it really doesn't mean anything by itself, the cam profile will dictate the static requirement to achieve the proper dynamic compression and more importantly cranking pressure. If you can tighten up the squish band without gaining too much cranking pressure, the motor will be much more efficient and powerful.
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