keuk
-
Gesamte Inhalte
376 -
Benutzer seit
-
Letzter Besuch
Inhaltstyp
Profile
Forum
Kalender
Shop
Articles
Community Map
Alle Inhalte von keuk
-
Polini EVO 130ccm - was kann er wirklich?
keuk antwortete auf wheelspin's Thema in Vespa V50, Primavera, ET3, PK, ETS etc.
I'll try a 35 and a new exhaust. I'll also reduce a little bit the squich, I have 1,2mm right now. Here is the curve of this week end. -
Polini EVO 130ccm - was kann er wirklich?
keuk antwortete auf wheelspin's Thema in Vespa V50, Primavera, ET3, PK, ETS etc.
Thank you for the reply, I'm tempted to try a bigger carb and another exhaust but what about the crankshaft ?, isn't the DRT sprinter too restrictive for the mixture ? Is there a better solution available on the market ? -
Polini EVO 130ccm - was kann er wirklich?
keuk antwortete auf wheelspin's Thema in Vespa V50, Primavera, ET3, PK, ETS etc.
On my racer's evo with 127/192, DRT sprinter 53/105, Keihin 33, 70%, franz, vespatronic, I have 21HP at 8800 and the engine doesnt' go further than 10200, that's quite good for racing but I would like to understand how some of you can achieve a way more hp than that, I think I saw a 30hp on this thread. To go further, is it necessary to modify the portmap of the cylinder, and to increase the height of the intake transfert in the barrel to increase the volume of gaz that can enter in the barrel ? What could be the most efficient point to work on, the crankshaft ? Remove the quicksteel in the casings transferts to increase the volume ? increase the diagrams ? Try another exhaust ? work on the compression rate? Here are my last year curves, I made a dyno test this week end without improvement, I had optimized the exhaust port and the intake. (I will upload the new curve later). The dyno is a softengine, it's a bit more severe than the P4, apparently 1for10hp. -
I have added a RS24 on the googledoc link.
-
The mudguard is exactly the same than the original, I have only enlarged the shock absorver area on the right side, so yes it's a bit asymetric but I kept the rib so that it should look nice.
-
I found this on grabcad, http://grabcad.com/library/honda-nsr-125-jc20-engine-top-end-1, nothing to do with Vespa, but this is crazy ! http://grabcad.com/marcos.armero/projects
-
It's just for fun, a kind of cad training. It would be a too big investment, not very interesting with all the solution already available for this niche market. Plus it would be a bit prententious with my small engine background. For the reed this one is already too big, it's wouldn't help solving my problem. For the other suggestion, yes maybe later.
-
I kept going on the casings but I have a problem with the carburator that touches the shock and the casing? If I want to keep a standard shock I have to turn the carburator and it touches the flywheel area, and it will dicrease a lot the airflow if I increase the bump on the casing... I need to find something else... I was hesitating on inclining the cylinder more (like a px) to gain room ?
-
You're right Polini wouldn't be happy to find fake files on the network for product that are still on production. As for the Chinese I don't know if this kind of file would really help them, they usually prefer to rebuilt a model from the beginning. I'm going to resctrict the sharing to here with a google doc link for the Vespa stuffs.
-
But with a nicest exhaust port , I did everything with a digital caliper.
-
Here: https://drive.google.com/folderview?id=0B4bDFY32byLjWDB3TTdMWDZsV2c&usp=sharing
-
Hello, I'm working on an enlarged mudguard for smallframes. The main idea was to create a good 3D model, to make it machined using polyurethane foam to create a master and then create a fiber model. If someone is interested by the project, I share the 3D file. It's not a definitive model, I still have to check if it is enough enlarged to fit a racing shock on pk steering column. Don't hesitate to post your comment to make it evolve. You can find the 3D files here: https://drive.google.com/folderview?id=0B4bDFY32byLjTDlXOEFuZVhPWG8&usp=sharing
-
Anyone knows the size of the thread ?
-
Hello, Can I safely remove the bracket of the BGM rear shock ? There is a seal so I was a bit hesitating. I would like to make a new bracket like on the new models for PV to move it a little bit more to the rear so that it doesn't touch the selector screw.
-
Nice job, is that you ? http://grabcad.com/library/stock-vespa-flywheel-mod-with-polini-evo-ignition-fan
-
Many thanks, I knew I had seen it somewhere !.
-
Another model with a read intake and a VHSB found on internet.
-
Well at the beginning I intended to built a identical model with all casting constrains and when I saw the complexity to transpose a real model on 3D with accuraty I was beginning to wonder , dammed how did they do to have such a good result so close from the original with the same details that are proper to the old manufacturing process when 3d didn't exist. But it appears difficult to have the answer, even if the 3d scan as a blueprint appears interesting. Nevermind I kept going with my caliper... So the model is very close from the original base with some optimisations. But a 3d scan would have been perfect to validates the bearing positions for exemple.
-
Ok, thanks. So once you have the STL file, there are softwares able to recreate basics geometries, like plan, radius, // between axis, screw hole etc.. right ?
-
Hello, Do anyone knows how Quattrini, Falc and SIP proceded to make their engine casings ? Did they use a 3D scan of an original casing and then make changes on a 3D model or did they recreate a full new and editable 3D model ? Maybe each one add a different technic ? It would interest me a lot to understand the process. I don't know if the 3D scan technology is able to recreate plane surface, cylindric shape with axis (for the correct position of each elements of the bearings ...) that you can use after in a 3D software like solidworks to make sketches and new geometries. I found this picture of the SIP model on google, the model is so close to the geometry of an original one that I have doubts and I would like to understand.
-
Results are there: http://www.chronolux.net/classements/2013/SCOOTENTOLE/index.htm
-
Polini EVO 130ccm - was kann er wirklich?
keuk antwortete auf wheelspin's Thema in Vespa V50, Primavera, ET3, PK, ETS etc.
Damned even with a CGN (2nd position from top) and 48 iddle jet, I still have the problem. Anyone is using a leaner that 45 jet on a Keihin33 ? However, after a little google search, when checking the float level, the float should not be depressing the spring loaded float valve pin, that the mistake I did above. I should have titled a little bit the carburator until the float tab just makes contact with the valve pin. -
Polini EVO 130ccm - was kann er wirklich?
keuk antwortete auf wheelspin's Thema in Vespa V50, Primavera, ET3, PK, ETS etc.
Ok... the float level wasn't good, I had 14mm instead of 16mm, so I have modified it. But I still have the same symptom. I'll try the CGN tomorrow. Is it normal that the float needle spring is fully compress by the weight of the float ? -
Polini EVO 130ccm - was kann er wirklich?
keuk antwortete auf wheelspin's Thema in Vespa V50, Primavera, ET3, PK, ETS etc.
So the idle jet was a Keihin48, I tried a Unknow44 one without touching the air screw, and the engine is still able to start without the choke. It's a choke with lever at carburator. The setup (Evo adjusted/Franz/Keihin33(150/CGL)/Polini mono reeds/Stroh intake). -
Polini EVO 130ccm - was kann er wirklich?
keuk antwortete auf wheelspin's Thema in Vespa V50, Primavera, ET3, PK, ETS etc.
Keihin33 with 48 idle jet.
