DieselBike.net

The 1897 Leon Bollee inverted trike used a hot bulb engine... 800 cc, 4 stroke single cylinder. To brake you move the rear wheel against the brake block... The 1896 Hildebrand & Wolfmüller seems to be based around a hot bulb engine as well. The rear wheel does double duty as flywheel.

Well, modern direct injection diesels have a compression ratio which is not even that much higher than high-performance petrol engines - 1:17 vs 1:12. That part of the idea of converting a spark ignition engine to a hot bulb / self ignition engine would not be that hard to achieve. The question is t...

Specific fuel consumption for hot bulb - and similar other low-compression - engines is much worse than that of high-compression engines. It is true that a 'big' hot bulb engine does not use that much fuel is you compare it to the size of the engine. What is also true is that those engines are not p...

Re. availability the way to go is to organize a group buy or find a company which is already importing stuff from China which might either be interested in importing these engines themselves or taking the extra engines left over from a group or private buy. Minimum order quantity will be around 20 e...

Tracking down the reports of crank failures in these engines I have only found evidence of several failures in the 22-25hp Punsun/Winsun. I have not found any reports on failures with 20 hp versions of these engines from any manufacturer. Punsun/Winsun has stopped manufacturing the 22-25 hp version ...

I'll give them an extra eye... Just going through the list of Chinese / Bangladeshi / Indian / South Korean engines @ alibaba, I wonder what it means when they state they can supply '10 engines per month' - it gives me visions of a shabby old barn where someone is sand-casting crankcases between the...

Well, I'm not really *set* on those V2's (vergeltungswaffen 2?) but they seem to fit the application quite well. Small car engines (Lupo, Daihatsu) are available but usually quite a lot more expensive - a running Lupo engine with all salient bits like ECU costs more than 20000 kronor at the wrecker....

Ah, but *which* of the many Chinese manufacturers to choose? Longfar, another Longfar, Nantong/Punsun, Fuzhou, Punsun and probably many others...

I posted a list of examples of these 'V-twin 20-25hp engines' in another thread. For completeness sake I'll repeat it here:

Longfar, another Longfar, Nantong/Punsun, Fuzhou, Punsun and probably many others...

Hmmm, problems. What doesn't have problems... If I were afraid of 'm I'd be in the wrong spot here, right? Now if 'problems' means 'dies after 1000 km' or 'my little sister is stronger' or 'drinks more than Boozah' then I agree, those are problems. If it is just a matter of taking 'm apart, taking o...

I'm looking at one of these for converting an Ural or Dnepr to diesel. Looking on the net up 'till now, I have not seen one in real life yet. I'd imagine they'd look even better in a Guzzi, just like the original engine. Not that strange, that, knowing the Guzzi engine started life as an industrial ...

Its sort of too do with the compression. The more you compress a gas, the harder and faster it tries to uncompress, thus the pressures increase. Now the other thing I forgot to mention is the Semi-diesel, or Hotbulb engine. Now bear with me here... They normally had compression ratios as around 3:1...

What about the Ural/Dnepr boxer engines? They have roller bearings - or can be easily upgraded to them, cast iron cylinders, pushrods and a relatively easy spot to add an injection pump - extend the camshaft or drive it off the timing gear. The crankshaft is weak so that would have to be replaced bu...

Hi'all, My real name is Frank de Lange. As ersatz-Swede (originally from the Netherlands) I live on a small farm somewhere between Göteborg and Trollhättan in Sweden. My username might give an idea of what I'm here for: I'm going to build myself a diesel-powered Ural with sidecar. The current Ural w...