[2 stroke] Prototype 150 cc

Hi all
is the first time I write in this forum ...
I introduce myself my name is salvatore I'm 25 and I'm Italian
excuse my ignorance ... I am using a translator to write ...
I am a fan of motor racing 2t
a few years ago a friend I like to plan and prepare for the Italian league vespa engine acceleration.
after trying some tuning kit wasp
we decided to build something more powerful and (craft)
so we built the first prototype engine with 150cc rotax 122 cylinder bored to 58mm stroke 56mm Rod 110mm
with this engine we raced the 2012 season
we have reached the power of 33hp

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for the 2013 season we wanted to exaggerate ... heheh
we are preparing a vane motor to the casing with cylinder
designed by us with inner diameter 58mm Aprilia RSW
56mm stroke
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you comments and suggestions!

Joli travail sur le carter moteur, bravo et bon courage pour la mise au point !!

Magnifique moteur.

Welcome on board, tore87!

Beau travail !

Marc a écrit:

Welcome on board, tore87!

thanks to everyone for the compliments!
the engine is still in the process of assembling ...
I hope to exceed 40 hp!
I hope to have made ​​the right choice ...
has anyone tried to mount a thermal Aprilia RSW
with suction reed valve? some have told me that
not good .... but I wanted to try ....
(I hope you understand my English ....)
today I finished milling the crankcase ...
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then we did a test assembly
to fix the pipes of the radiator and to make the shock absorber
back ...
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we are missing to weld the muffler
measures as I plan to use those of the Aprilia RSW
you say you are fine even though it is a reed?

Nice job

thanks

Why are you covering the crankshaft?

I have seen that on TZ 125, but not on Honda or Aprilia

There certainly are persons on this forum better informed to answer your question of applying the Aprillia cylinder to a reed valve inducted case. However experience with similar applications has shown me to expect a loss of peak power. In contrast to this expected loss. When the output is measured by acceleration, some of that loss can be recovered by tuning for a wider power band. If indeed your application can make use of a wider power band, try using a small aerodynamic reed cage to keep the cage velocity as hi as possible, While also favoring a cage with a small number of petals. If your transmission requires keeping the torque peak power as hi as possible, opt for a larger cage with a larger number of petals, as well as more included angle. Of course any cage of a given size will benefit from being optimized for flow. Those points being made with the extent of rotary valve based R&D of the Aprillia cylinder, one could only expect that development of an equally competitive reed valve would require at least the same extent of R&D. Personally if measured at the same RPM I would expect an optimized reed valve to obtain peak hp that is a minimum of 4 to 6 bhp less than that of the rotary valve. My opinion only. Kermit Buller


Best of luck with your project.

romeuh80 a écrit:

Why are you covering the crankshaft?

I have seen that on TZ 125, but not on Honda or Aprilia

hello
I decided to cover the crankshaft to do an experiment ...
I saw that some kart engines do ... them, however, have the problem that the shaft rotates against the aspiration ...
since I redid the full the whole upper part of the cover it seemed logical to try this! if it does not work that way I can mill away and becomes an engine like honda gp ...
for now I feel like that!

2005bully a écrit:

There certainly are persons on this forum better informed to answer your question of applying the Aprillia cylinder to a reed valve inducted case. However experience with similar applications has shown me to expect a loss of peak power. In contrast to this expected loss. When the output is measured by acceleration, some of that loss can be recovered by tuning for a wider power band. If indeed your application can make use of a wider power band, try using a small aerodynamic reed cage to keep the cage velocity as hi as possible, While also favoring a cage with a small number of petals. If your transmission requires keeping the torque peak power as hi as possible, opt for a larger cage with a larger number of petals, as well as more included angle. Of course any cage of a given size will benefit from being optimized for flow. Those points being made with the extent of rotary valve based R&D of the Aprillia cylinder, one could only expect that development of an equally competitive reed valve would require at least the same extent of R&D. Personally if measured at the same RPM I would expect an optimized reed valve to obtain peak hp that is a minimum of 4 to 6 bhp less than that of the rotary valve. My opinion only. Kermit Buller


Best of luck with your project.

hello
I'm going to use a reed-like w-force
This package is sold by PARMAKIT but has also been used on and ktm aprilia / rotax
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how to ride on a vertex piston diameter 58
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tore87....
You have a well thought out project. The reed cage looks like a very good choice. What type of transmission drive does your application use, a centrifugal clutch, belt, disc, or manual clutch. There are a lot of questions I have, but don't wish to over indulge my welcome.

After doing an internet search for accessories for vespa competition. I need to ask for an excuse of my ignorance... it is amazing how advanced the market is. Wanting to learn more, is anyone able to suggest a forum where technical information on related equipment is discussed?

Kermit Buller

2005bully a écrit:

tore87....
You have a well thought out project. The reed cage looks like a very good choice. What type of transmission drive does your application use, a centrifugal clutch, belt, disc, or manual clutch. There are a lot of questions I have, but don't wish to over indulge my welcome.

After doing an internet search for accessories for vespa competition. I need to ask for an excuse of my ignorance... it is amazing how advanced the market is. Wanting to learn more, is anyone able to suggest a forum where technical information on related equipment is discussed?
Kermit Buller

hello
the wasp has a manual clutch
I use a clutch billet Alloy with hardening treatment!
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tore87
Is the clutch wet or dry? Is it mounted directly on the crankshaft? What kind of engagement rpm's can it withstand until it's efficiency goes away? Is there an option to modify the clutch to function as both manual and centrifugal? Is it correct to assume that in addition to the clutch there is a manual transmission. Or is there a CVT belt system?
I don't mean to ask what is the obvious to you. Just very curious.
Kermit Buller

the clutch is in an oil bath
This clutch has been tested by the manufacturer up to a power of 50hp
holds great!
the transmission is 4-speed craft!
This is a photo of my engine last year
pui to understand how the clutch
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tore87, what is the piston from ?

rgdavid a écrit:

tore87, what is the piston from ?

piston by vertex

the medium is ready
We did some testing on the road ...
diciam that has become very dangerous eheheh
I put some pictures of the finished work!
I hope that some expert able to give some advice ...
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I also did a short video of some test parency
is yet to be placed in carburation
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Nice job boys!! Looks powerfull !

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Sorry for the sideways pic... This us my 150 engine that I use my Aprilia copy cylinder bored out to 58mm. Makes 56hp when using Buller dual carbs and burning methanol. You will be just fine:)

Very beautiful  
There is 2 carburators ? because i see 2 rubbers pipe (orange) no?

Yes, look at 2005Bully's profile pic, he makes them and they are VERY GOOD!

hi tore87

congratulation for your amazing motor
i've watch your sprinter in any video of sprint race in italy,good job  

gab a écrit:

hi tore87

congratulation for your amazing motor
i've watch your sprinter in any video of sprint race in italy,good job  

thanks for your interest!
we always work to improve in the near future there will be new for the 2014 season!