Uhm... if are like the ones being used on the European Championship... I could say that are Aluminium heads, the unique is that are drilled to be lighter, but not Magnesium.

Hi Scott, dont understand what do you mean?? do you mean the spring lock nut with 1.3mm thread protruded out?

They are magnesium, Jilles was using it... Here is part of an interview he did with redrc:

"Commenting on the new magnesium head from Sirio which he ran in the 2nd and 3rd sessions Groskamp said, ‘It felt actually really really good. I talk later with Sirio and see what we are going to do with the head but it was really good. Tomorrow we are going to try it again."

And a pic:

I think so. Turn the nut that compresses the spring until 1.3mm of thread shows.

hello and good dae everione. im running a sirio evo3 sti 3 port in my mtx4. i was wondering if anione had clutch settings and gearing to match this engine so that i can get max performance out of this engine. would anione be kind to me and post it here? thanks =)

First,
what size track are you running on and what level of traction/
If you run on a large trrack with med - high traction you could try a 1mm -1.2 mm on the clutch spring and .4mm -.5mm endplay using the Mike Swager clutch building method with either 17/ 23 pinions or if the track is really big 18/ 24 pinions will work.

This engine has loads of power and revs so try a couple of different combos and see what works for you best.

thanks itchy b, im running on a small to med, pretty technical track with high traction that causes traction roll haha..... so im guessing 17/23 will work? and i have to drill out the clutch i suppose? do u have a link to Mike Swauger's method? thanks a whole lot =)

You will want to ru a 16 -22 or 17 22 pinion set to get the Sti to sing then
If you are traction rolling then try checking the front track with as if you run under 198mm in width widen it up a mm or 2 as this will help keep it on it's wheels

What needle settings is everyone using for the Sirio EVO III Kanai. Non-STi... Thanks fellas

Hi All,
Is the piston/rod/liner set for the Evo II worlds still available as i have one in need of a rebuild.
Is the Evo III piston/liner/rod set compatible with the Worlds Evo II?
if yes on anything can you please post a link to the site.
Cheers

Not sure of the piston and sleeve questions but here is the website. Not much help here. I was PM'ing another user here for a manual. If I get it I will post it here.

http://www.micromotori.com/

Hi guys just picked myself a S12T3ISTI am curious to know what a good pipe is to go with this engine? at club meets I race on a reasonably small track but each month take a trip to a larger track with 66m backstraight so any suggestions appreciated.

Cheers.

Sirio 2611... Don't settle for other things... no matter what they tell you. No one better than Sirio to release a pipe who suits the best for your Sirio engine.

With the proper gearing and clutch, you could be really well on such different tracks. 66meters of backstraight is not much at all, enough to clear the crankcase from excess of fuel.

Interesting. I will be testing this very soon. At present, I am using a Skyline VR12 Plus pipe with the .12 STI and I'm not very happy with the bottom end performance. I'll see if it's any better with the 2611.

Usual.... nothing that someone wanting to do some pipes to ruin an engine. Sorry for the rant, but I'm fed of those VR12, JP-1/2/3 and others.... Nothing than Sirio to make a pipe for their engine, the same applies to Novarossi for their mills and similars (Think on Max/RB/JP/...).
[Mode Rant Off]