Actualy im in germany , but regular unleaded in usa is 89 octane standard . Then theres 91 and 93 octane . We have ethanol added in the gas . Although i use it in my car i use a gas called Recreation 90 .... Or rec 90 as we say .It has no ethanol , and i run it in my motorbike 10:1 forged-piston engine .and my chainsaws at work . Which are pro grade stihl . Hard to find and mostly by the coastal towns of usa.. Ethanol eats carb parts in small engines ,,,
Just got Peterborough to Bude on same tank fully loaded with camping gear and 3 bikes on back at 55mph ish, on the way back was doing 65-70mph but had to fill up on way. Last year went on sportsbike and had to fill up 3 times but saved hours just felt like I was still on bike for 2 days after.!!!!
Research Octane Number (RON)Edit The most common type of octane rating worldwide is the Research Octane Number(RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane. Motor Octane Number (MON)Edit Another type of octane rating, called Motor Octane Number (MON), is determined at 900 rpm engine speed instead of the 600 rpm for RON.[1] MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern pump gasoline will be about 8 to 12 octane lower than the RON, but there is no direct link between RON and MON. Pump gasoline specifications typically require both a minimum RON and a minimum MON.[citation needed] Anti-Knock Index (AKI) or (R+M)/2Edit In most countries, including Australia, New Zealand and all of those in Europe,[citation needed] the "headline" octane rating shown on the pump is the RON, but in Canada, the United States, Brazil, and some other countries, the headline number is the average of the RON and the MON, called theAnti-Knock Index (AKI), and often written on pumps as (R+M)/2). It may also sometimes be called the Posted Octane Number (PON). Difference between RON, MON, and AKIEdit Because of the 8 to 12 octane number difference between RON and MON noted above, the AKI shown in Canada and the United States is 4 to 6 octane numbers lower than elsewhere in the world for the same fuel. This difference between RON and MON is known as the fuel's Sensitivity,[4] and is not typically published for those countries that use the Anti-Knock Index labelling system. See the table in the following section for a comparison. Observed Road Octane Number (RdON)Edit Another type of octane rating, calledObserved Road Octane Number (RdON), is derived from testing gasolines in real world multi-cylinder engines, normally at wide open throttle. It was developed in the 1920s and is still reliable today. The original testing was done in cars on the road but as technology developed the testing was moved to chassis dynamometers with environmental controls to improve consistency.[5] Octane IndexEdit The evaluation of the octane number by the two laboratory methods requires a standard engine, and the test procedure can be both expensive and time-consuming. The standard engine required for the test may not always be available, especially in out-of-the-way places or in small or mobile laboratories. These and other considerations led to the search for a rapid method for the evaluation of the anti-knock quality of gasoline. Such methods include FTIR, near infrared on-line analyzers (ASTM D-2885) and others. Deriving an equation that can be used for calculating the octane quality would also serve the same purpose with added advantages. The term Octane Index is often used to refer to the calculated octane quality in contradistinction to the (measured) research or motor octane numbers. The octane index can be of great service in the blending of gasoline. Motor gasoline, as marketed, is usually a blend of several types of refinery grades that are derived from different processes such as straight-run gasoline, reformate, cracked gasoline etc. These different grades are considered as one group when blending to meet final product specifications. Most refiners produce and market more than one grade of motor gasoline, differing principally in their anti-knock quality. The ability to predict the octane quality of the blends prior to blending is essential, something for which the calculated octane index is specially suited.[6]
I was getting about 15 mpg with my 2 litre type 4 which was badly tuned and couldn't breath due to the crap pancake filters. After swapping air filters, getting tuned on a rolling road I just got 23mpg into and over the Lake District which I'm happy about.
Bog stock 1600TP in'73 westfalia. Averaged 25mpg going to and from Tatton at the weekend. Half motorways at 55-60mph, and half through the lakes at 30-40mph. Pretty happy with that, though a little more power would be nice.
But for some reason the gas in the u,k, smells sweeter coming out of the engine than north america. And parts ofEurope . Sounds funny but it does .to me anyway .
I put two K&N RA-0520 air filters I got off ebay which were double the price of the 'Empi' versions and happy with them so far.
Thanks. Like you had, I have the supplied chrome pancakes but didn't realise how poor they are so they're due for the bin!
I might have just been unlucky with my pancake ones but the rolling road guys who tune and map everything from classics to race cars said they had never seen air filters that were as restrictive / bad as mine! At some rev ranges they were knocking over 10bhp off the 70bhp of the engine