Dave, if Ultimate does not have parts in stock don't worry. We stock them all and they can special order them. Regarding the pipe our NTC3 pipe seems to produce overall more power than the AE dual chamber and compared to the RD Logics pipe it produces more bottom and mid range with a little less top end. Hope this helps.

Murnan Sirio EVOII
 

I had a chance to break in my EVOII yesterday at Crystal. I ordered it awhile ago but, I haven't had chance to break it in completely. It has over a gallon through it and the overall powerband is great. It has plenty of bottomend, midrange, and
top end speed. I'm sure that I can get more top end after I adjust my two speed properly. I'm very satisfied with the performance. Originally, I was interested in purchasing the LCM Pro3 but, the Murnan has all the muscle that I was craving.
I ran into a problem late in the day. I noticed that after the clutchbell started to heatup, the clutch began to slip. I'm running a three shoe clutch on the NTC3. It has copper springs with (2) 2 1/2mm holes drilled in each shoe. I'm not sure if I should go back to the 2 shoe or if this engine has too much power for this style of clutch. I going to try the 2 shoe again and if all else fails, I'm going to have to shell out $100 for the Yokomo centax.
Thanks Uriah for the quality craftmenship.
Dave

glitch44... I run the EVO II also in my G4 and I'm pretty much at Crystal park every weekend... I was going to ask what pipe you're running on your motor, but since you're running yours on the NTC3... That motor runs better on alittle longer pipe then the Associated dual camber pipe... If you're ever at Crystal park, look for the G4 with the big blue head Sirio Screaming around the track... :nod: Toys for Tots next weekend... Check it out...

As for your clutch problems... You should really run a proper centex clutch on that car with that kind of motor... Either the Yokomo or Kawahara centex clutch... Both are at Ultimate hobbies.. Good luck.

RC_Alan

rc_alan,
I'll be running next weekend as well. My buddy DJ will be announcing most of the race. I wanted to get some more practice today but, this damn rain. I feel sorry for the offroaders that were scheduled to run TFTs this weekend at Crystal. Hopefully they will be able to reschedule. Anyway, I'll be practicing this Friday, weather permitting. Well, off I go to Ultimate to spend $$$. Some money that the wifey does'nt know about. :sneaky:

Late,
Dave

:sneaky: .. You didn't tell the wife??? :nod: Dave, I'll try to get some run time in myself Friday, but it's hard when you're working two jobs... I hope the rain let's up some this week and clears out for good for the weekend of the race. You know, I switched carbs on that Sirio EVO II... I had a little trouble at first tuning it and I heard some owners had air leaks, so I put in a Novarossi carb from a NS3 and no problems since... The motor was screaming with 20% fuel while breaking it in and then I've since bumped up the nitro content alittle and made some minor mods to the sleeve... I was going to mod the crank as well, but the power was right were I wanted it to be so I just left it alone... One of the key things about motors is matching it with the right pipe. Nova's run great with the Mugen pipe and the Yokomo Milkie pipe, Picco's with picco pipes and Sirio's with Sirio pipes... but I've found that the STS/RD Logics pipe #22604 is a great match for the Sirio EVO II and the new LC Sirio.. Just passing on alittle info for those looking for a good pipe to go along with to great motors from Sirio... Hope to see you at the TFT's race glitch44... Goodluck and let me know which centex clutch you got for your NTC3... :nod:

RC_Alan

Evo 2
 

i heard a lot of good things, is it more powerful than the usual AAC? which is better 5port or 3port? most of the comments are from the 3port users

what do you guys think about the Sirio s12 TRP I ? (its 3 port and its got the blue head)

Well, it is the IFMAR spec Sirio Evo 2 engine.
What it has, is a different cranckshaft with 8mm diameter center passage big turbo scoop that blends into the center passage and a 213º induction timing.
The S12 TRP E (EFRA spec) crank has 7mm diameter center passage, and turbo scoop doesn't blend into center passage.

Resuming: ballistic power, huge top end.

AFM

Thanks AFM :) i actually one this engine off ebay :) cant wait to get it now that i know its an EVO 2 :)
so whats a TRP PRO I ? when i won the bid i actually thought it was the engine used in the RRR's at the worlds :p

also with the evo 2 do i need to mod the conrod for better lubrication? or have the evo 2 fixed this problem over the old sirios with conrod probs. and how are the carbs on the evo 2's? much better than the old leaking models?

thanks in advance AFM :)

These EVO2 engines have no problems with carbs or conrods. Just do a good break-in process and treat it with care, like any high end engine.
The worlds engine replica has just been announced at Sirios web page www.star-motor.com it is called S12 WCR.
In the web page there is some good info and videos on proper break-in and tuning.
BTW these engines work best with Sirio's own pipe.

AFM

thanks once again AFM :)
as you and many others say sirio works best with sirio pipes. i was just wondering if a Nova max pipe works just as well? as its much easier for me to get a hold of them at a reasonable price

this is the pipe im talking abouthttp://www.rcaddict.com.au/product_info.php/cPath/10/products_id/9

thanks in advance once again AFM :)

My experience with several Nova based pipes wasn't as good as with the Sirio pipe. You see Sirio engines have a different power band by design, but according to RC Nitro magazine January issue, in which they dynoed a Collari Sirio, they got an impressive 1.6 bhp max power (most powerfull small block engine they've ever tested), and they did it with a Novarossi 51602 pipe with 1/2" gap between header and pipe. You should get that magazine because it really explains very well the design insides of Sirio engines, which clarifies exactly why one needs a wide power band pipe design.

AFM

Thanks AFM
i cant actually get a hold of that magazine im from australia.

but ill try to get my hands on a sirio pipe :) thanks for everything AFM.

Sirio .12 (black head) instruction manual?
 

anyone know where I can download a Sirio .12 (blk head) instruction manuel? Your help is appreciated! thanks

Re: Sirio .12 (black head) instruction manual?
 

Go to www.star-motor.com that is Sirios web site. You'll find general instructions for all .12 engines.

AFM