View Poll Results: Which fuel do u fill your baby up with?
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Optimax, BP ultimate, Synergy 8000 or Vortex 98?
02-03-2006, 06:42 AM
#21
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frisky, I don't think you can compare RC engines to the 4 stroke automotive engines. The Honda s2000 engine, f20c, in Australia has not changed since the first release date. Even the new 06 model may still have the 2.0L f20c.
02-03-2006, 05:48 PM
#22
I think H9k is right on this. There is very little difference between the 00 and 04 engines, it's just that the 04 has been tested and certified.
I'm not sure about the acidic residues but a two-stroke engine running nitro (-methane I assume), ethanol and castor oil is a very different chemical reaction to a 4 -stroke running primarily petrol with a small percentage of ethanol.
All that said, I was under the impression that the potential problems with ethanol had more to do with rubber fuel lines breaking down and gumming of injectors. Whether or not these have changed 00-04 I wouldn't know.
I'm not sure about the acidic residues but a two-stroke engine running nitro (-methane I assume), ethanol and castor oil is a very different chemical reaction to a 4 -stroke running primarily petrol with a small percentage of ethanol.
All that said, I was under the impression that the potential problems with ethanol had more to do with rubber fuel lines breaking down and gumming of injectors. Whether or not these have changed 00-04 I wouldn't know.
02-03-2006, 09:28 PM
#23
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I have a friend who had a mid-1990s Mitsubishi Magna which overheated and cooked the engine. He had been filling up regularly at an el-cheapo service station that was later prosecuted for excessive low-cost additives (mainly ethanol).
Rightly or wrongly, he suspects the ethanol as the cause of the problem.
Rightly or wrongly, he suspects the ethanol as the cause of the problem.
02-03-2006, 09:32 PM
#24
I'm sure he does. But a better question is what quality coolant does he use? I'd bet that the sort of person who buys petrol from 'El Cheapo Station' doesn't change their coolant too often.
02-03-2006, 09:42 PM
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Dunno. But the car had been overheating for some time. I assume he just kept adding water. The final act was when the lower hose disintegrated and dropped all the water.
Whether the crumbling rubber caused the gradual water loss and thus the overheating OR whether the overheating caused the rubber to crumble I don't know. It had over 200,000KMs and went to the scrapyard.
Would excessive ethanol cause an engine to run hot because of its higher calorific rating?
Whether the crumbling rubber caused the gradual water loss and thus the overheating OR whether the overheating caused the rubber to crumble I don't know. It had over 200,000KMs and went to the scrapyard.
Would excessive ethanol cause an engine to run hot because of its higher calorific rating?
02-03-2006, 11:02 PM
#26
Ethanol has a lower calorific value than petrol. And ethanol has a higher octane so is less likely to cause pinging which can lead to overheating.
A ten year old car goes to the scrapper because of an overheated engine? I'm guessing there was a whole lot more wrong with it than that. I recently rebuilt an overheated engine (twice) in a 15 year old car.
A ten year old car goes to the scrapper because of an overheated engine? I'm guessing there was a whole lot more wrong with it than that. I recently rebuilt an overheated engine (twice) in a 15 year old car.
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