Fuel discussion.

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steven

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I have only used 98 octane unleaded fuel in my Tiger here in Australia. We also have E10 unleaded 91 octane, unleaded 95 octane.
On my first big run in the Tiger ( over 350Klms ) it needed fuel, I pulled into a nearby servo and it only had E10 91 unleaded so i put 30L in the tank. Well then my trouble started , pulling out on a 100KPH highway the car spluttered after 100m and died, I had a layby to pull into. It took 15 minutes to get the car running again. On the remaiing trip back, every traffic light it stopped unless I reved it hard (people were thinking I wanted a drag. )
The only thing I can think of is that E10 is crap and was vaporising in the carby bowl. The 98 octane never did that. I intend to drain the crap E10 out and put it in the modern. It has a insulator under the carb
 
Ok I have found this to fix my carby hickups
Aircraft Grade Birch Plywood
  • SKU: ME MEP4130
  • , Thickness: 3mm 6 ply
 
steven said:
I have only used 98 octane unleaded fuel in my Tiger here in Australia. We also have E10 unleaded 91 octane, unleaded 95 octane.
On my first big run in the Tiger ( over 350Klms ) it needed fuel, I pulled into a nearby servo and it only had E10 91 unleaded so i put 30L in the tank. Well then my trouble started , pulling out on a 100KPH highway the car spluttered after 100m and died, I had a layby to pull into. It took 15 minutes to get the car running again. On the remaiing trip back, every traffic light it stopped unless I reved it hard (people were thinking I wanted a drag. )
The only thing I can think of is that E10 is crap and was vaporising in the carby bowl. The 98 octane never did that. I intend to drain the crap E10 out and put it in the modern. It has a insulator under the carb
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Maybe you should check to see if you have a clogged fuel line. If you haven't cleaned and recoated the tanks the original tank coating tends to flake off and block the lines. That would cause a lack of fuel to the carb or the problem could be vapor lock. Ethanol is an octane booster that can be corrosive to old rubber lines, seals and the original tank coating. It wouldn't cause an instant melt down. The big problem with ethanol is that it doesn't tolerate water. Here in the states all fuel retailers have to have systems to monitor water levels in the tanks to prevent problems. There may be an excessive amount of water in the retailer's tank. FYI, Australia uses the RON ( Research Octane Number) system for octane rating versus the U.S. AKI (Anti Knock Index) system. Your 91 octane equates to an 87 here in the states. Multiply the RON number by .95 to come up with the AKI number. To blend an E 10 87 octane fuel the refiner starts with a sub grade fuel such as an 84 octane and the 10% blend of liquid ethanol will raise the octane to an 87 octane. The same applies to all grades . The ethanol doesn't vaporize out of the gas.
 
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65beam said:
Maybe you should check to see if you have a clogged fuel line. If you haven't cleaned and recoated the tanks the original tank coating tends to flake off and block the lines. That would cause a lack of fuel to the carb or the problem could be vapor lock. Ethanol is an octane booster that can be corrosive to old rubber lines, seals and the original tank coating. It wouldn't cause an instant melt down. The big problem with ethanol is that it doesn't tolerate water. Here in the states all fuel retailers have to have systems to monitor water levels in the tanks to prevent problems. There may be an excessive amount of water in the retailer's tank. FYI, Australia uses the RON ( Research Octane Number) system for octane rating versus the U.S. AKI (Anti Knock Index) system. Your 91 octane equates to an 87 here in the states. Multiply the RON number by .95 to come up with the AKI number. To blend an E 10 87 octane fuel the refiner starts with a sub grade fuel such as an 84 octane and the 10% blend of liquid ethanol will raise the octane to an 87 octane. The same applies to all grades . The ethanol doesn't vaporize out of the gas.
Click to expand...
I have had confirmation that aussie E10 fuel blend causes our cars to behave very badly. Simon has a Humber super snipe and he had to use E10 one night on his way home. The car did the same as my Tiger it stalled ran very rough and he had to heel and toe it all the way home same as I did. He also said when he filled the car with our 98 the car ran good again. I have drained the E10 out of my Tiger and will fill it with 98 tomorrow
 
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