Kreidler Minarelli G-force measuring 22hp 14.000rpm very exiting drive

The exiting part starts at 2min.13sec
This was one of the first videos of the high power version of the Minarelli Stage6 Kreidler 70cc with Ftt7014S exhaust, made in 2010.
Several G-measurements with Mr Dyno showed an average power of 22hp at about 14.000rpm
The Minarelli Vertical Stage6 cylinder is tuned max as possible, but still in standard Kreidler cranckcases with narrow (44mm) studs and no welding extra material. If that would be changed there would be more room for transfers and so more power.
The only purpose of this engine was to show a simple and a cheap way to get much power. After the G-force measurments and some movies for exhibition the engine was dismanteled.
It may look some violently, but that was not my intention. That experience is mainly caused by the lacking of a clear view and the 24mm wideangle of the carmera which all seems to go much faster than in reality. This video is only about the acceleration.
If you want the highest attainable power of a 70cc or 90cc or any other twostroke engine. Or much more information about racing - dragracing - ignition and tuning see my facebook and read my notes: / luc.foekema ...
Specification the engine this video made in 2010:
- Kreidler engine Minarelli Vertical 70cc cylinder
- Air cooled (not forced cooling)
- 5 speed standard
- UltraSap Ignition
- Ftt7014 exhaustpipe
- Standard Kreidler crankcases with narrow studs 44 mm wide
- Driving position was fully upright, just behind the camera.
- Carburetor Mikuni TM24
- Reedvalve V-force Minarelli horizontal without the center bridge and 4 big polini petals
- 22 hp at 14.000rpm
- topspeed 145 km/h without fairing
- bike is standard Kreidler about 75kg
- driver 70 kg
Profile:
I started racing in 1964. Computers were still not there. I did hardly no calculation. With the advent of the computer everything has changed and complicated calculations are no problem any more. All old historical notes were struggling. In the past 15 years I got a number of programs. Beside I did developed many programs myself in Excel. It was my profession to do so for my employer for many years.
In 2003 also start making calculations for on request. The most important details can be calculated very accurately for any twostroke engine. For instance the exhaustpipe can be calculated in almost exactly the correct speed for which the setup and cylinder is optimal. Most important I found out that most tuned engines are not in full balance, that means one or more details are not tuned for the rpm for which the engine was made or was supose to be made. All details should be made for the same rpm range to stumulate eachother to the top of there optimal function and so to get the most reachable power for any level. Low level or high level makes no difference.
Even by a large kart engines manufacturer (TM) was found to be not entirely correct. With a new calculated combustion chamber and exhaustpipe it was far better then before. Read the results of a super kart at the European Championship in "the comments of requestors on Ftt calulations".
This is also partly due to the information I got from Jan Thiel and was freely available after retiring from Aprilia racing end 2007.
Also the UltraSap ignition developed by my son Raimond was a very important part. The combustion and power are strongly influenced by the kind of ignition. Read about this subject my note on Facebook.
/ 4209180766868
2t tuning is first of all to have fun !
Sincerely,
Luc

[@vk3kvk]

Finally someone that knows what he is doing!!!Great work,there is nothing better than a revving 2 stroke! Brings back memories:-)))!

[@50ccRacing]

vk3kvk thanks

[@christopherhenrysson9022]

@@50ccRacing Wow! i have 15.3 hp in my 4 speed Zundapp. ported superterm Athena rev to close 13000 rpm! BUT im not even close to your hp! my next prodjekt will b a 5 speed! im lossing to much power Between Gears with 4 speed.

[@2stroke4me]

Lovely sound :)

[@ikilforkut]

love it!!!

[@pauldean8638]

No way is that 22bhp ,it'll try and buck you ,I hear it's not standard but it's defo not 22 ,you've got full rev range and there is always a loss of some part to gain in other to achieve 22bhp from such a small cc

[@50ccRacing]

22hp for 70cc is by far not max which is possible. Max is 31hp with reedvalve and 34hp with rotary valve. This is a simple one for use on the street. Look my 50 Facebook notes if you want something to learn about twostroke tuning. In 1968 I road in the front of 50cc race at TT Assen for WC. 15hp at 14.500rpm topspeed 165km/h.

[@pauldean8638]

@@50ccRacing I had a many 2smokers in my time and likes of gp125 you throw on an expany, clean up crankcase and ports (just Polish out rough casting ) an 10° out of crank valve an it's good for 18 rwbhp with a poss up jetting depending on if drastically needed it ,for the same size prob in weight ratio and it was up wheeling through the gears off the throttle ,yeah 22 bhp isn't maxing out what can be achieved for 80cc ,they a local w/champion tuner by me and he's pushing upto 18bhp out of 27cc,nice power from basically a strimmer motor lol more power than legal learner 125cc and 1/4 the weight

[@50ccRacing]

@@pauldean8638, thanks, but about what I read now, you have to learn very much about 2t tuning, so read my FB notes, it will sure help you much. Gr. Luc

[@pauldean8638]

@@50ccRacing don't think you get my meaning, lol am on about what I could achieve from minor mods I'd get more power weight ratio ,last gp125, (I like crank valves ) fully tuned hit 115mph with only a bit of lightening of the bike , if you slotted a early 80s model cr80 they produce 22bhp and I bet it push a 100mph in that frame and I bet it wheelie first few gears doing it ,just don't understand why bike isn't pulling harder for 22bhp being geared so low as well ,I noticed your video of bikes so am interested in looking at your fb page as you can always learn more ,you learn nothing from ignorance of knowledge from others who have their own way of doing things from a different manufacturers I don't know about ,2 strokes as am sure you'll agree is different through each motor ,ie if we where given 2 motors new on the market we know roughly where to start tuning but we could only guessedimate as say intake angles and length different and so on ,only once you spat out a load of barrels would we know which way you would port it so fresh charge would scavenge effectively,well once you do pipe size also as well as fuel lol ,I know it's Lil gains make the biggest goals in power

[@pauldean8638]

@@50ccRacing I don't mean to be critical on first video as it looks not like a 22bhp bike where as you look at your 15bhp you'd say it looks correct for power stated ,maybe you weren't yanking the throttle in that video of the 22bhp.i got a question on your sprint bike though ,how come you have a lead acid battery fitted ? ,you can use a short cycle capacitor powered electronic ignition that in all weighs the same as a 1/4 of the weight of the battery and you get faultless spark with auto adjust 5° cdi , you can chose flywheel weight and you gain with no gauss drawing power for the ht coil or other type of coil ,mean being a sprint is same as power to weight matters just like a drag bike ,I couldn't understand even if it was for telemetry as such a small bike you'd want to drop wieght where as big drag bike you'd say it's nominal to weight of bike to power

[@morticeandrigby]

what if you put a small turbocharger on it

[@50ccRacing]

It still would be faster, but the intention was to show the most simple way to get much power. If I want to have more there are several ways to get it, but always more expensive. Read the whole story on facebook.