"Riley Will" said: I am so greatful I found this forum! To be reading pages written by Mr. Thiel and Mr. Overmars is incredible for me. Being in Canada, there is no 2 stroke knowledge which becomes actually designing and building 2 stroke engines. I have read and re-read the 37 pages of posts and always look for more.
My company builds 2 stroke engines for kart racing. Like Mr. Payart of FPE, we build a disk valve twin cylinder 250cc Superkart engine. Just recently we designed and build a 150cc fixed gear engine for American dirt track Karting.
Good morning Riley, At [Vous devez être inscrit et connecté pour voir ce lien] I noticed that you offer exhaust pipes indicated # 21 and # 55. It so happens that Aprilia used those same numbers for two of their most effective pipe designs. Coincidence? Did you ever try the latest pipes, # 102 or # 106?
chevalier
Nombre de messages : 112 Age : 57 Localisation : 49 region choletaise Date d'inscription : 30/11/2010
We have tried many pipes. I always come back to the Type 21 and 55. I have not had access to the other designations you mentioned. Would love a try though
Frits Overmars
Nombre de messages : 2638 Age : 76 Localisation : Raalte, Holland Date d'inscription : 12/10/2010
The 150cc is a 58.0mm bore x 56.7mm stroke. Uses a 110mm connecting rod with 20mm crank pin. Main bearings are NJ205 type. Any other information, just ask:)
pfpraider
Nombre de messages : 16 Localisation : bourne england Date d'inscription : 25/11/2010
Sujet: BRC Superkart 11/2/2011, 20:27
Hi Riley, did I see you use a ProX rod in one of your engines. Its a great forum isnt it
Riley Will
Nombre de messages : 54 Age : 52 Localisation : Calgary, Alberta, Canada Date d'inscription : 14/01/2011
That was a picture of the first angine where I used a 22mm crank pin. We immediately went away from that and now I use an Italian 110mm rod with 20mm crank pin. We cut the connecting assembly mass by 40%!!! This of course then changed the crankshaft design (balance factor), but in the end 20mm pin is better.
Yes, cant agree with you more, this forum is awesome!!!
ridley
Nombre de messages : 1326 Age : 70 Localisation : Dans les collines du Perche Date d'inscription : 19/02/2009
I have long been in contact with this company and I'm about to buy some of their products. I have sensors PCB Piezotronics to address pressure values exhaust and inlet.
Frits Overmars
Nombre de messages : 2638 Age : 76 Localisation : Raalte, Holland Date d'inscription : 12/10/2010
No, I was not aware of TFX. After looking at their website, I think I need to call them! Cylinder pressure really interests me. Frits and Jan, What sensors would you like on your 2 stroke dyno?
Exactly what TFX is offering: high-resolution cylinder and crankcase pressures. They also do some coaching!
ridley
Nombre de messages : 1326 Age : 70 Localisation : Dans les collines du Perche Date d'inscription : 19/02/2009
Frits, you know this material? And if yes, do you use?
A dutch kart-tuner who uses my hard- and software on his dynamic test bench, is quite happy with his TFX-equipment and with the support he gets from them. I have no own testing facilities in Holland but if I did, I would certainly look at TFX. It seems to be real good value for money.
ridley
Nombre de messages : 1326 Age : 70 Localisation : Dans les collines du Perche Date d'inscription : 19/02/2009
Thank you for your reply, frits. This type of material usually costs a lot, but TFX offers a solution to a very attractive price. I think this is the best way to understand the inner workings of an engine, that is why I am buying this equipment, for development on my engines. Is that users of this material have a website?
Frits Overmars
Nombre de messages : 2638 Age : 76 Localisation : Raalte, Holland Date d'inscription : 12/10/2010
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