How about this engine?

[navinav]

Hey guys I was wondering what you think about this engine. Haven't contacted the company for price yet but was doing some google searches and came across this. Company claims it is fairly clean with good mpg and multiple operational use.
http://dieseltrading.en.ecplaza.net/3.asp

[Sphere]

It's more or less the same as all the other V2 diesels. Hard to find concrete data on reliability etc. I will try my best to find the guy on this forum that started importing V2s and report it back here; I would try to get my engine from there. DieselFly imported his own, but he ordered 3 (one for spares) for two bikes.

[pietenpol2002]

These guys appear to have the 22 hp and 25 hp in stock. Bear in mind that those performance figures may appear larger than in real life. I don't know anything about the company so I'm in no way vouching for them. You'll note that they don't have the 10 hp or 13 hp "in stock". Sadly, it was reported (I believe on this board) that Winsun has abandoned production of the 13 hp due to crank failures. And I was counting on one of those 13 hp pups as an upgrade when my little 10 hp would no longer answer the call.

http://www.a1biofuel.net/Winsun-25hp-Specs.html

[navinav]

I'm gonna do some more research but the price seems reasonable. I still can't make up my mind on the frame yet. Definitely like the vintage look so I've been searching ebay for military bikes. Found these chang jiang bikes that look pretty cool. So maybe this will be the engine that will go in it.

[Oer Al]

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 engine meant for mixing concrete and such.

Has anyone on this forum used one of these engines for a conversion? If so, speak up please. We want to know how it worked out, which of the many 'brands' you used, how it holds up, whether it runs fine on 'other' fuels, etc.

[Sphere]

Lots of people talking about engines failing other people have used, Chinese singles and V2s, but it's hard to distinguish the actual story from the hearsay.

I tried to track down the original reports on dieselkrad and I didn't count past 3 I think. I would like to see a new thread on here that lists orders and problems for known cases.

[Oer Al]

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...

[navinav]

So the consensus is that all these Chinese engines suck? or is this hearsay? It is true, that you get what you pay for but I know that Chinese electronics have come a long way so I'm wondering if their engines have gotten better. Sure do have a great price. I like the idea of the dnepr or ural. I've been looking for the chinese clones. The chang jiang. I like that retro mil. spec style.

[Oer Al]

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 of this engine but it seems to be available from Longfar and possibly others. I don't know if the Longfar suffers from the same problems as the Punsun/Winsun engines did. The picture of the broken crank from one of the 22 hp Punsun/Winsun engines shows what seems to be a partly welded, handmade crank. The crank in the 20 hp version of at least the Punsun/Winsun as well as the Kipor engines seems to be made the right way. Everything I've seen points at Punsun/Winsun, they seem to have made a bad batch of cranks - as replacement cranks from the factory also break within a short period - for the higher-powered engines.

If anyone has anything else to say on this issue please speak up. If the bad reputation these V2's have only comes from the ill-executed Punsun/Winsun versions it would be a shame to shun the whole class as they do fit the motorcycle role quite well. If anyone actually has opened a recent 22-25 hp Longfar or similar engine and has something to say about what the crank looks like speak up as well - if those newer engines have solved the problems with the first generation they might be worth considering, until that time I'd want to have a look at the innards before I buy one...

I'm currently looking at the Kipor KM2V80 which is a water cooled version of the V2 recipe. One of the advantages of this engine is that is comes equipped with a 20A generator instead of the puny 3-6A versions in the air-cooled V2's. Water cooling probably also gives it better longevity, especially in the sometimes harsh conditions it will have to endure. The disadvantage of water cooling is that it does not fit the looks of the bike like the air-cooled version does. I'm willing to forgo looks if it gives me better reliability and enough power for a decent set of lights. Maybe I can even rig in water-warmed handlebars and such as I use the bike year-round in Sweden. The air head is good for warm feet though...

[Sphere]

The biggest problem I see is availability. You can obtain singles at a reasonable price but twins in Europe... not that I know of. I think rotek.at sell the water cooled engine you mention. But again, at that price you can get the Yanmar new or as new if you have patience.

[navinav]

What about methanol/water injection. Would it be cheaper to buy an air cooled and hook up one of the water injection kits?

[Oer Al]

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 engines I guess. Pricing is not clear yet as I have not had an answer from Kipor.

[Sphere]

While reading a German forum, I found more indications of weak Punsun cranks:

http://www.ural-dnepr.net/wbb3/index.ph ... post150386

Das ist die Kurbelwelle des Winsun/Punsun 22HP, also aktuelles Modell, vom Hans. Bestätigt sind bis jetzt 6 Kurbelwellenbrüche bei 10 Motoren, Hans hat schon die dritte Welle drin. Man sieht schön das die Welle nicht zusammengeschweißt wurde, aber die Ausgleichsgewichte, weiter bricht sie immer genau an der gleichen Stelle. Der Vorgänger mit 20PS hat das Problem nicht, der Nachfolger mit 25PS ist immer noch nicht verfügbar und nach Aussage eines amerikanischen Importeurs auf die Frage nach dem 25PS: "We are very happy to reply about this. Actually, it is rumour or a AD. Its true power is 22 hp @ 3600 rpm. mean while, the quality is not stable. Maybe, one year later,when quality get improved, then, you can take a test for this style."

6 faulty units out of 10 and one guy is on his 3rd. Again, it's hearsay, but it might be valid. I think this is strictly about Punsun/Winsun but I have not followed up on the matter.

[Zem]

It is valid, I am the guy with the 3rd one, I don't trust those engines any more! I have heared that there are several factorys in China producing those engines, some of them may work. It is also strange that the engine has a Maximum of 22 HP but you are not allowed to use 22 HP over a longer period of time.

I have heared that those Kipor V2 are much better.

But anyway, I think: If you want a new engine, buy one with defined quality, even if that is more expensive than the chinese stuff! If you want a cheap engine, buy a very cheap, used one and see what happens.

best regards

Hans

[Sphere]

Sorry to hear it. How did you source the parts, from China?

[Zem]

The quick answer is: I don't. My Enfield was converted in Germany and not by myself. But I think it was some kind of shipping involved. In february I finaly sold the bike.

If I would build an Enfield by myself I would use a Ruggerini MD190. Those engines seem to work as long as you don't name your bike centaurus.

regards

Hans