I don't have experience with Sirio off-road engines, but they do have some you can see in their web site http://www.micromotori.com/

As for the Drake Edition engines I think they are Picco based

AFM

Does anybody know if the Evo3 STI P/S fits on the Werks LCollari LC12 (EVO2 version) this is the one with the AAC P/S????

thanks,

hey guys
can we use os turbo plugs like the p6 p7 in the sirio evo 3 ?

what would be a good os plug to use ? or is using the sirio plug best ?

thanks

sirio #6 or #7 is best.

I just got my self a Sirio Evo 3 STI and it has just got through 5-6 tanks of race tuning. Somehow when I check the engine the crankshaft has got lots of play which indicate bearing worn out. This happened to my friend's engine too and he too has about the same tanks through it. Is this normal? And by the way what is the size of the bearings? I wanted to order replacement from Boca Bearing.

If the crankshaft has some play when you push and pull it with no flywheel mounted, I wouldn't be worried.

Dave

I use the OS #7, and it works fine for me!!

At the last EC, (sorry, don't know if was Andrea Rossi or Bertin or whatever.. but was someone from Sirio) told to a friend of mine who isn't nothing unusual to get the main bearing worn after ending the break-in of the STi's along the conrod (in fact, the first ones were a nightmare to break-in them). I changed the main bearing to mine and works like a charm.

Main bearing isn't much expensive, so if your one has developed play, change it and enjoy the engine.

they come this way new.

Yep

if i was to put the sti crankshaft in to the sirio evo 3 would there be much a noticeable difference ?

whats a good running temp for these sirio engines ?
ive heard the sirios love temps above 130degrees celsius

my os tr currently runs awesome around 100 degrees

I just changed the front one with Sirio original part bearing and its still got that left to right or up and down play. I think I need to change the inner bearing as well, however my LHS doesn't have it at the moment.My LHS however got OS TZ replacement bearing, will this fit? Can you give me the bearing size for the inner one?

Bearing size is 12X21X5. If OS bearing has the same measurments (I think it does) it should be good replacment.
How much play crank have? It suppose to have some play-it is C3-C4 class so those bearing are selected to have play to work on high RPM. If engine has just 5-6 tanks racing tune it should not be worn out-way too early. The best way t check without tools is-wash case with denaturated alcohol very well-no oil resedue should be there, insert cranck all the way and spin it slow-if you fill it is rateling (not spinning free) then it is indication of bad bearing. When bearing worn out-it is not just balls get smaller or race trak on the rings get bigger-it is always some metal chip out from balls or raceways and you should feel it easy.
Here is link http://www.bocabearings.com/main1.as...rnal_Clearance where you ccan read about bearings clearance.
If you decide to change bearing-I personaly will stay with OEM or other proven brand and defenetly will avoid to use cheap general manufacturing specs.

I to have found that the sirio replacement front bearings have too much play in them. So much so that you can actually see the balls from the outer side. I also compared my new front bearings weep to an older engine and mine had considerably more weepage so much so that it covered the entire front of the engine upto and past the carby. Now i dont think this is normal.