OK mas bien parece un circuito medio-largo con esa recta. La TPO3 puede funcionar.
AFM

Muchas gracias AFM, por contestar, sobre todo en Espaņol.
Si me llega, para este fin de semana la pruebo y te cuento como me ha ido. Si no llega, pues me tocara probarla la semana que viene ya en el Nacional, a 700 km de mi ciudad.
De todos modos, te mantendre informado, muchas gracias de nuevo.

De nada. De donde eres?? Yo voy a Madrid el 1 de Junio, y estare por Alcobendas para el Nacional de 1/8 el 12 y 13.
Saludos
AFM

Yo soy de Alicante a 400 km, de Madrid.

man we brought 5 sirio EVO2 here to Brazil.... and all engines came with problems of wearing too fast the engine!!!!! just one race and all the engines had no compression at all!!!!! its amizing!!!! each of the guys used different procces of break-in....all of them have failed!!!! should we give it back to trinity!!!! i have to say that im really angry with this engine!!!!!

Fura, what process for break-in did you use, and what fuel.
What temps where you running, how was compression set (shiming).
I have a Sirio Evo2 for 3 months now, and after changing my conrod, have no problems with it. Yesterday I placed second in our local championship race and the engine is still tight and well.

Wan't to know this, because I was planning on buying a second
Evo2, and maybe ther is a batch of bad engines from USA.
AFM

Hi guys, for your records below is the official answer I got from the factory concerning conrod life for the Sirio S12. Also I did measurement to crank pin on a new stock engine and found that it has 4.428mm.

"The right play between crank pin and conrod bushing is 0,04 - 0,05 mm. I don't know if you're able to check it, but I suggest you change the conrod every 2-3 hours running.
The life of the conrod depends mainly on the fuel you use, as the lubrification and the right carburetion keeps your engine running well for long time."

Regards,

ANDREA ROSSI
Lavorazioni Meccaniche srl
Via Meucci, 3 Seggiano di Pioltello Mi Italy
Tel +39 0292160235 Fax +39 0292160581
Visit our Web Site at :
WWW.STAR-MOTOR.COM

From calculations about conrod life, according to Sirio factory, one should change the conrod between 0.4756 to 0.7133 gallon.

How come??? Well, if a 75cc tank lasts an average of 5 minutes, one makes 12 tanks in 1 hour, which is 900cc. So according to Sirio that says change conrod after 2 to 3 hours running, that means change conrod between 1800cc and 2700cc of fuel. Now if 1 gallon has 3,785cc, that means the lifetime of the conrod is less than one gallon.

BREAK-IN

After reading a post by Andrea Rossi in the Sirio's web site, this is the correct Break-In procedure for the S12's

1.- One (1) tank in the bench at WOT with very rich setting of HSN, avoiding it to go on 4 stroke.
COOL DOWN
2.- Three (3) tanks on the track with very rich setting of HSN, and tuning the HSN at the end of third tank to get almost full power.
COOL DOWN
He says after that, the engine will give more power after every new tank.
3.- For 20% Nitro, use .20 head shim and N° 7 Glow plug.

Which means that Break-In should be done with more or less 300 to 500cc of fuel.

AFM

i am also looking for a evo 2 any info is good for me to have!

hi , my engine was broke-in with 3 tank of sidewinder 16% nitro of full trotlle and 80c temperature.... and 1 colplete tank on the the so i started lean it out...... the engine last one race!!!
the other one was broke-in 5 tanks of byron 16% o iddle anmore 2 tanks on the track and started lean it out.... last ine race....
the other one with 1 tank of full throtlle and two on the track with novarossi 10%!!!! one race long!!!!!!!! the other two i dont know how the broke the engine in... all know is that the engin didnt last more than 2 races!!!!!!!!!!amaizing... i think all the engines that came here came with problems!!!!!!!!!! fuck!!!!

That is very strange. Have you posted your problems with Andrea Rossi at Sirio's web site, because it could be a a bad batch on the USA market.
I bought mine in Spain and has allready 4 races on it and still runs like hell. It is the fastest engine I've had up to now.

What are the symptoms. They don't perform well any more??? Hard to tune??? Doesn't hold Idle??? Overheats ??? You can move piston without resistance or pinch towards TDC???

AFM

It is realy sucks!!!!!!!!!!
I will never buy Sirio even after first engine, not to wait for 3.

They were different drivers with same problem, not one.

There's something wrong there. I have my Sirio after 4 races and is running better everytime.

AFM

Three different drivers, but problem is the same. So we can't claim someone make the same mistake-all three drivers can't make the same mistake. Only one thing left-engine.

I wouldn't jump on a terminal conclusion like you do TG, it would be the same if I said i have terrible experience with your Palmaris engine. Don't forget you are a manufacturer and it is not seriuos to comment like that.
I think we must make more serious analysis before bashing a brand of engine.
You know better than anybody that Breaking-in at WOT, if not done correctly can damage any engine, and maybe that is what they did wrong.
Here at my track there are several drivers with Sirios and nobody has had that kind of problems.
Lets have more caution on critizising an engine and not create panic among users because of somobody's bad experience we haven't lived or seen personally.
Or are you trying to "divert water to your well" ???????

AFM