Resource : 99 Ron SUL locations

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OP
Joined
18 Oct 2002
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1,601
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Fab36 Dresden
Hate said:
shame its knock rating is so poor :(

I expected the opposite

Taken from PH
It's 5% alcohol (ethanol). Ethanol contains oxygen so can be seen as already partially-burnt fuel... burning ethanol produces less energy than burning the same molar quantity of ethane (the relevant hydrocarbon).

However ethanol has a higher knock resistance (octane number) and thus can be raised to higher compression ratios in engines without detonation. Higher compression ratios allow higher power outputs.

For turbo engines, the increased knock resistance will allow the ECU to maintain higher boost levels without detonation, thus producing greater power outputs in less than ideal conditions (i.e. high ambient air temps, etc.).
 
Soldato
Joined
18 Oct 2002
Posts
7,175
Location
Sussex
heard from people on the scooby club and the celica club their EBC's going mental as the knock value was really high.

my car also spluttered like mad from it, back on optimax methinks
 
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