I run a Dynamite medium plug in my 5 port AAC Sirio and it really hauls.Never had a problem with it.

My brother just sent me 2 of each of those Novarossi plugs that I've listed.
So those are the choices that I have.

I'd say run medium heat plug.

What are your carb settings?

Don't really know right off hand.

Trinity sent me the 2 needle carb.
I can't get that carb to run under 5 1/4 turns out on the high speed needle.

I can let you know tomorrow

Alright thanks.
I just want to know if people are running leaner than my settings.
I'm thinking I have an air leak.

Are you sure it is the two needle carb??? That is a very old Sirio carb which had a lot of problems to tune it correctly, and that is why they changed to the 3 needle carbs of late Sirios.
Any way, Sirio recommends the following base settings:
HSN needle 5.5 turns out
LSN needle 3.75 turns out (should be flush with the end of the slide body)
Mid Range Needle flush with carb body, than 1 turn out
Glow Plug Novarossi C7TGF
Sirios need a lot of fuel, they don't perform well if you lean them to much.
If you really have that 2 needle carb, better be thinking on changing it for a Nova based carb, or the new Sirio carb.
Hope this helps
AFM

Plugs,plugs.OK:

For non-turbo head (std. plug):
Novarossi C6S mediumplug, for cool days
Novarossi C7S cold plug, sunny and hot conditions
Novarossi C8S verycold plug, for extremely hot days or high RPM running.

For Turbo head engines:
Novarossi C6TGF hot plug, for cool days
Novarossi C7TGF medium plug, best all round plug for most conditions
Novarossi C8TGF cold plug, for extremely hot days or high RPM running.

AFM

Yes, I have the 2 needle carb.
When I first bought the engine it had the 3 needle carb.
That carb was giving me problems.
So I sent it to Trinity, and they sent me the 2 needle carb.
Both carbs suck.
This has been the only engine I can't tune.
Every time I try to go below 5 1/4 turns, everything goes out of wack.
So I leave it at 5 1/4.
That's why I want to know what everyone else is running,
I just want to see if I could get more power out of it.

I have all 3 of those turbo plugs you listed.
I'll try using the C7TGF.

Out of Trinity you can get something like that!!!!! The two needle carb is a piece of $%%$&.
I have my Sirio .12 EVO 2 (bought in Europe) and came with the 3 needle carb, and runs beautifull with no problems. Very stable
My settings are
HSN needle 5 3/4 turns out
LSN needle 3 7/8 turns out

Leaning out an engine does't necessary mean you will get more power, it depends on several factors combined; Compression ratio, Plug, Pipe, and correct gearing for the track you are running at.

AFM

The thing that pissed me off was it took them 5 weeks to get it to me.
I'll tear the carb apart and make sure that everything is sealed up and that I have no air leaks.
If that doesn't work, then I'll try putting my carb from my MT12 on it and see how it does.

Don't waste your time, just drop the MT12 carb on it. Be carefull with the perfect match of sealing "o" ring, and just tune it and you will enjoy a trouble free Sirio. Start with 5 turns out on the HSN needle and 3 turns out on the LSN needle for that carb.
AFM