Ive tried that pipe and unfortunatly its no good , motor wouldnt rev and it run very hot because the carbon fibre doesnt disperse heat as good as alloy, i agree the skyline or the sirio 2611 pipe are the best

Wow is this why all the Sirio drivers at the wprlds both team and non team were using these pipes at the worlds ?? Geez we missed out!
Hey Guess What Josh was running with his Orion engine - Sirio Pipe.
Cant be that bad uhh.

This has probably been discussed before but I can't find it. What are the specific differences between the EVO 3 and the STI? Is it just the "hand picking/matching/assembly" or are the components different? The website is a little vague because the EVO 3 has a coated crankshaft with epoxy and cuts in the sleeve also. Is there a noticable difference in power between the 2?

Thanks

The STI has more AGGRESSIVE porting on the sleeve. I think that's about as far as you can go in terms of porting on a full production motor. It's definitely impressive to see a stock engine come out of the factory like it does. The only thing that could be improved is the porting on the crank. It's also hard coated.

Power wise there is a big difference, that's my opinion personally.

I agree...it has alot more work done to them from factory than the first Evo 3.. also the cranks seem to be holding up alot better also........they are definitely faster than evo 3 IMO.... see ya sunday Jim ...ill have something to show U

Its just a pity there after sales service is shit. I have 2 evo 3's and a STI which is still nib, I have replaced everything and i mean everything bar the cooling head, crankcase and carby body and my engine wont come bakc to idle. i have tried to phone the australian dist for the engine, the phone rang out, so i emailed them, nearly 3 weeks later i still havent heard a thing from them. granted the motors are fast but whats the point of having a fast motor if you cant get any service when things go wrong. Unless things have a Major turn around i wont buy another Sirio again.

try ringing them again

I think the 6 attempts is more than enough. I also think that sometime in the past 14 working days SOMEONE at Kellets wold have had 5 mins to send me an e-mail even if it was just to say that they had recieved my e-mail but they were busy and someone will answer me soon. To say i am over Sirios is an understatement. You would think after the fiasco with the previous dist and how there claim was they were going to fix the Sirio problem they would help but i guess it was all just bs.

Don't take it the wrong way but are you sure it's an issue with the quality of the engine and not a tuning issue?

I have had my hands on 5 separate Sirio STI's and haven't really had any problems getting them to run as they should.

Not coming back to idle can be due to a couple of things, idle too high to compensate an overly rich bottom end is one, air leaks from the carb can do the same.

The only time I saw an STI run-on ( high idle ) it was because the top end was way too lean ( the guy who had the engine thought it was too rich, and that's why it wasn't making power) the real power issue was that the clutch was way too early and it caused the engine to overheat.

HTH

Lue

No offence taken. Yes i am sure its not the tune. It only happens when you start to tune the engine for power. It starts to do it from about 105 deg C and it doesnt matter what you do with the bottom needle. I have sealed the base of the carby, the back plate and as advised by another Sirio user sealed the slide boot around the carby base. This problem is with my Evo 3 not the STI the STI has not been started.

have you got another carby you can try on the motor? i had similar issues with the older evo2 motor i had it got really frustrating... borrowed a nova carby from a friend and the motor purr'd like a kitten and tuned so easy good.

Yep tried 4 different ones on it, 1 of which was my brand new STI carby!

Show me? Is it something I have never seen before?

No you have not seen it........Jag


Its shame that some distributors give certain products a black eye....hopefully these dist. will offer some good customer support to resolve any issues and try to keep there client base.

Dude.
There should be no problems with your engine, If you were in Sydney I would say bring it to me and I would sort it out, however by process of elimination,
I would say do these following things next.
1) use ONLY good %16 fuel Runnertime is a good start.
2) use ONLY standard shims in head
3) use ONLY a sirio 7 plug no other brand or range,
4) Use ONLY a sirio pipe
5) If you go 25% add a small shim and use a sirio 8 plug only.
6) If you still cant tune this engine get an experienced driver to do this for you generally found at your local track.
NOTE if you have it in a RRR chech the tank for pressure common problem

Kellets will help you with your product issues but I think that this is not a product issue. I have seen hundreds of Sirio evo 111s in action and have used modified tuned and raced dozens more, they would have to be the best tuning engines out there.

Let me know how you go
cheers
Alex.K