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Old 04-20-2003, 05:05 PM   #1
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Default Sirio .12 Opinions!

I wanted to know from those of you guys with Sirio .12 motors how you have been liking them. I'm looking for a new motor to drop in my V-one-R, (my MT-12 kicked the bucket this weekend) and I'll be getting the ROAR Legal version. (I currently race pretty seriously in my local club, and I want a legal motor just in case i decide to head out to my local ROAR sanctioned track) What do you have to to say regarding tuning ease, durability, and performance? I've heard that it's one of the fastest legal motors out there, and some say Josh Cyrul had the fastest motor at the IFMAR Worlds (although I highly doubt his Sirio was box-stock ) Any problems with air leaks? Have they fixed the now infamous first-gen carb problem? Thanx for the help!
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Old 04-20-2003, 08:32 PM   #2
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I use RB x12 5 port engines and MT 12's Richie mods. I bought a Sirio 12 to try, I brought it home took it all apart, and I was'nt impressed at all. I boxed it up and sent it to Matt at Smeltz Racing for modding, but keeping it ROAR legal. I hear he makes them much stronger. Waiting on it's return now.
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Old 04-20-2003, 09:04 PM   #3
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The engine is pretty strong, it start up everytime. Not a bad engine for that price.
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Old 04-23-2003, 01:26 PM   #4
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i have a sirio that has been modded by smeltz and its great

i have seen plently of them that were stock and they were good performers

i think my sirio is faster than my mr-12 and they are both modified

i did switch the sirio carb with a novarossi one i had clearance issues on my mtx3 and the sirio carb is only legal with its carb restricter
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Old 04-23-2003, 07:42 PM   #5
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Cool Sirio

I had my Sirio for about a month before it blow the con rod.
Had to wait for ever to replace it so beware for status on replacement parts for this Motor!!



On the other hand this motor is a very strong motor for what you pay for!!




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Old 04-23-2003, 11:31 PM   #6
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Default Re: Sirio

Quote:
Originally posted by PUNISHER
I had my Sirio for about a month before it blow the con rod.
Had to wait for ever to replace it so beware for status on replacement parts for this Motor!!
Typical Trinity!!

It was the same deal with Picco parts. Way overpriced too.

Hopefully Novarossi parts availability and pricing wont suffer.
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Old 04-24-2003, 12:40 AM   #7
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Default SIRIO

i sell these engines here in my country (philippines) i'm using da outlaw one, i think this is da most powerful and cheapest .12 engine i ever had, i haven't reached 100 deg. cel. on a main race,considering da weather. it's summer here, conrod is still fine,i almost consume 5 liters of tornado fuel now.breaking-in is easy using da 2minute-4 cycle technique. i highly recommend this engine guys. lots of parts available. sirio also has this cool tuned pipe,neat coupling!
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Old 04-24-2003, 12:57 AM   #8
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Default skibum989,

Sirio are nice motors. If you decide to get one use the carb from the MT12, I think it should fit. A suggestion though, since you are probably used to tuning your MT11 did you consider getting the S3 Novarossi, I have the S5(5 port turbo) and it has amazing acceleration and top end. The difference between the S3 and S5 as follows. This is from memory so hopefully info is correct.
S3 S5
3 port legal non-turbo 5 port turbo non legal
1.5 hp 1.5 hp
37,000 rpm 38,000 rpm
Nonetheless, if you are serious about getting the Sirio then do so, I saw a new model at my LHS with a blue head. Previous Sirios came with black heads. You might want to check this out. I would not be suprised if these blue ones have the carb fix and maybe the new turbo style crank this might be the closer to the motor Josh Cyrul was using. I did not check if this was a turbo or 3 or 5 port model.

Last edited by XtremeMDX; 04-26-2003 at 10:07 PM.
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Old 04-24-2003, 08:05 AM   #9
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sirios are cool engines great price good performance

put a novarossi carb on them and they get better

modify them and they get really fast

but honestly if i could get a novarossi s3 i would

novarossi quality is unbeatable IMO

a rod shouldnt be hard to find i was going to get a spare i have seen them at 1 or 2 hobby store near me

IMO the fastest cars at my local track last weekend were modded sirios followed very closely by a novarossi s3

the sirios have been modded the s3 may have been stock but maybe not the s3 is owned by a very competent engine modifier but he had told me the engine was already very very close to all legal race specs
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Old 04-24-2003, 09:39 AM   #10
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personally i think you'd be better off with an MT2 or MR12, i hear nothng but bad on sirios

though i wouldnt mind racing one, see how it compares to my pixi
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Old 04-24-2003, 09:52 AM   #11
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Default sg shaft or threaded shaft??

what's the difference between an 'sg shaft' and a 'threaded shaft' on an engine. i'm looking to buy an s5 engine soon and am noticing they offer these two shaft choices.

thanks in advance!!
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Old 04-24-2003, 10:18 AM   #12
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sg shaft has a smooth section at the end past the threads for the clutch bearings to run on

most touring cars with 2 speeds require them

threaded shaft requires the use of a nut with the shaft on it

normally threaded shaft engines are used in 1/10 truck where they only run a single speed and the sg shaft would be too long

ntc3 comes with all necessay equipment to use either as far as i know its the only touring car that can allow this outside the hpi type cars
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Old 04-24-2003, 10:29 AM   #13
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Default thanks!!

thanks jason!! u da man!!

also, the problem with my real car was a bad thermostat. they had the car back to me by lunch time!!
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Old 04-24-2003, 11:41 AM   #14
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it figures
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Old 04-24-2003, 07:21 PM   #15
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How does a Mugen MR-12 compare to the legal Sirio?
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