Chat & Social > The Bar - General Chat
102 RON fuel (plus price
glaggs:
If an engin has been tuned or was built with a high compression ratio - say 11-1 then it will require higher octane fuel to avoid pre-ignition which would cause vave and piston damage! Performance or race engins running this sort of compression ratio would benefit from 100+ octane. Higher copression would need higher octane or octane boosters. Running a standard road engin (and they are built to run on the standard poor quality fuel sold at todays petrol stations) would not realy benefit from higher octane fuel but would probably appear to run better because of better quality fuel. At best you would gain a cleaner burn and shouldn't have any valve problems. It you want better performance from your fuel, run the recommended grade but use a primium brand, Shell or BP and avoid supermarket brands. To benifit from the extra potential power in higher octane fuel the engin has to be built or tuned to process it efficiently.
I run a 1200 Bandit, Wisco Big bored to 1216, Kent Cams, balanced crank, stage 3 Dyno jetted, blue printed head, dyna 2000 ignition etc.etc and it does 157.8 bhp on std pump fuel Compression is estimated to be 12.5 to 1.
wing nut:
legalise red diesel i say :wink: :lol: :lol: :lol:
Rich_P:
What octane rating was the 4-star leaded fuel?
the loon:
--- Quote from: "wing nut" ---legalise red diesel i say :wink: :lol: :lol: :lol:
--- End quote ---
you mean its not legal :?:
why do I see all these garages selling it then :?:
thats just asking for trouble
:lol: :lol: :lol: :lol:
johnpirate:
I think the old 4 star leaded was about 97/98 octane.The old 5 star leaded was 101 octane.But that went out years ago
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