Small engine vapor lock12/3/2023 Most had a steady diet of 10% ethanol blend for a long time, cant say i ever saw any problems caused by the fuel in those. Most of the MGs and Triumphs i worked on were from the late 60s up to about 1980. Old stock carb repair kits, especially for cars that should be in a museum, would suffer the most. Replacement parts, Carb repair kits are suppose to have newer resistant rubber parts, but i doubt that some at times. I cant say i have seen a lot of ate up rubber in older cars and trucks, but it does happen some. It is real bad in small engines, like lawn mowers and such. There is some swelling and destruction of rubber carb parts, fuel lines. Here for ever, there has been some real fear of the blended fuel. This is corn country, kind of ground zero for ethanol. In Omaha Nebraska there has been 10 % ethanol gasoline ( petrol ) since the late 70s. Most i have not seen on the streets in decades. Worked on a lot of MGs, Triumphs, and a whole lot of really strange little cars. I worked in Import/ Sports car shops going back to the late 70s. Since they are used to suffering with old British Cars, i doubt if they will notice much. Tell those Limeys there not to fear the 10 % ethanol bend. Welcome to the Forum, this is a good place. My other passion is Ford sidevalve motors, of the small variety, in my Dellow. The fuel lines are all made of modern materials so ought to be ethanol resistant.but it is not a tarty farty gucci car, but merely a nice, almost daily driver for an old fart like me, so a reasonably spacious motor with a nice auto gearbox. I'm looking forwards to trying 10% 95 octane pump fuel in my '67 Mustang.with its 200-6. How to make our old bangers survive on 21st century petrol? ![]() If one has an open mind about old engines, then it is well worth reading and figuring out what is going on? but not the entire carb!Īnyway, I've tried to source a USA link for the book which gives the chapter & verse on the test results, arrives at all sorts of unpalatable conclusions, but offers only tentative advice.įrom the UK, the book is as per the link below. It is these high exhaust temps which heat up the carbs. had very little to do with minuscule evaporation in fuel lines or pumps, and had more to do with the fact that, due to this cyclic variability thing being quite pronounced, exhaust temperatures were very much higher than wanted. They also found that the heat issue old engines now suffer from. Most if not all, were unleaded Īs expected, teh expensive top grade fuels performed reasonably well, but surprisingly, fuels with 5 or 10% ethanol did equally as well as the gucci petrols, in making the old engine, run much better. It is why common retail petrol doesn't have anything like the shelf-life of petrol from the 1960's!, as well as normal pump grades. ![]() The real problem old designs of engines have is, today's petrol, has a totally different make-up to the petrol sold in the 1960's! It has very different components! Especially when volatility of its head end components is considered. The tests were conducted in a scientific manner, and came to some startling conclusions! Here in the UK, Manchester University conducted a series of in-depth tests on an old design of engine with the main objective being, to find out why old designs of engines fared so poorly on today's petrol? , with dire stories of fuel systems clogging up and breaking down, etc. Here in the UK we are looking at getting 10% ethanol fuel, and there is a lot of weeping & gnashing of teeth going on in the old car world. Aside from the issues of tanks and other old rubber fittings getting dissolved, ethanol in smaller percentages is probably going to make the older I6 engines run better, when compared to today's basic retail petrols.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |