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E5 fuel

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21 minutes ago, openspaceman said:

Yes the higher the octane (resistance to knocking) the lower the calorific value, to the extent that engines that ran very high compression ratios and had to use methanol to prevent knocking would have 70% bigger jets and much increased fuel consumption.

 

The corollary is that diesel, which won't ignite with a spark and detonates if put in a spark ignition engine has 10% more calories than 95ron petrol

Yep, you just beat me to it.

I remember as a school boy running a Bantam on methanol....It went like shit off the proverbial hot shovel.

 

Running a low comp engine on high octane fuel may only be a waste whereas running a high comp engine on low octane fuel can definitely cause damage.

Edited by Macpherson
spelt bad
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32 minutes ago, Macpherson said:

running a Bantam on methanol.

Filed head and CastrolR?

 

I never tried methanol myself in anything other than my model aero engine.

 

Ran the LR110 V8 on propane though and wish I'd upped the CR on that. The engine was so reliable for 10 years that I never had reason to modify it.

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14 minutes ago, openspaceman said:

Filed head and CastrolR?

Yep, Love the smell.....it didn't last long !

 

I'm thinking that the problem with alcohol in petrol is the petrol..... maybe I should mix some Stihl green with some pure spirit😄

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