Tony Simoni loves to do Dyno testing. He has been bringing bikes to Carl at Motorcycle Machine Specialties here in Sacramento for about a year now. Carl has a lifetime of tuning knowledge and has been great to work with.
Normally huge motorcycles are propped up on this Dyno getting power readings but on this day 64cc Polini was our subject.
Next years PoliniCup race with have a Polini Puch class. The rules so far include: must be an E50 motor, Polini puch kit, 21 carb, no CDI, any Puch clutch and no case inducting. Sounds challenging.
Tony decided he needed to develop a pipe just for this purpose. So a day at the dyno was in order. We brought with us Tony’s prototype pipe with adjustable header lengths 1 inch 2 inch and 3 inch. Also, everyones favorite pipe the Destroyer, a N8P and even a good ol Techno Boss.
The chart below shows the four pipes best runs.
The Dyno was collecting data from about 6000 rpm to max.
The Prototype pipe gave us encouraging results for first runs. But it will take some tweaking to be ready for next phase of tests.
Boss pipe did exactly what we always have known it to do. Maxed out at 7.5 HP, hit a wall at 55mph and feels flat across the the whole range. Never hits hard anywhere but for as cheap as it is you do get a good boost.
N8P pipe was true to it’s history as well. Not terrible in the low, hits super hard and pulls crazy beginning at 7HP. Then really enables high RPMs at 9.5 HP. The highest RPM we saw of the day was 11600 on this pipe.
Destroyer was the favorite with best range to top speed comparison. 8.5 max HP during our runs. 10500 RPM at max. Pulls hard right away and only gave up about 2 mph under the N8P.
The Polini Kit we used was completely unmodified out of the box, case matched, HPI ignition, 21 race carb, no air filter, 94 main jet, Malossi 4 pedal reed, Motomatic intake. 11600 RMP outta stock Polini!!!!
Check the Blog tomorrow for results of Tonys bike and road test for top speed.
Here is a clip of Tony Simoni ripping during Practice. I’m still lagging on getting more video up. It’s time consuming. But its raining now so there is hope.
Gnomes showed up randomly at 10 pm with KingCobra and some TP. Brad promised again to come downtown and ride with Squids. We shall see. I wanna make Brad race next year. He is a midge gnome and rides fear free.
So many rippers today. I have a really early drive back to Atwater in the AM. Check this image until I get the rest up and rest up. Jimmy, Jeff, Tommy, and Elliot were all battling today with very close to equal bikes. It’s the best kind of racing to watch.