R/C Tech Forums

R/C Tech Forums (https://www.rctech.net/forum/)
-   Offroad Nitro Engine Forum (https://www.rctech.net/forum/offroad-nitro-engine-forum-157/)
-   -   Sirio engines thread (https://www.rctech.net/forum/offroad-nitro-engine-forum/29456-sirio-engines-thread.html)

twiggy 02-05-2007 02:03 AM


Originally Posted by rmdhawaii
Finally ran the .12 Evo3 STI today and even though I still had it running rich, it was silky smooth and very fast. I was running it with the Novarossi pipe and it spooled up really nicely. This is probably the best engine I've ever had in my car. Two more rich tanks and I can start leaning it. :D

glad you like it :)
have you tried running it with the sirio 2611 pipe?

twiggy 02-05-2007 02:06 AM


Originally Posted by nikoskar
Dear All,

- After how many lt you change the rear bearing from .12, .21 On Road and .21 Off Road Sirio Engines?
.12 Sirio Evo 3(& STI)
.21 PR Pro & WCR(&STI if you know0
.21 Kanai(&STI)
- And the Conrod?

P.S.
I change mine PR Pro rear bearing every 4 lt of 25% Kyosho Fuel.
The conrod every 8lt

Thanks in advance.
Nick

i only change my bearings when they start making that 'rough' sound.
i never change the rod.
has anyone ever measured the length of a new rod as opposed to a used rod to see if the rod has bent or lengthened?

nikoskar 02-05-2007 02:28 AM


Originally Posted by twiggy
i only change my bearings when they start making that 'rough' sound.
i never change the rod.
has anyone ever measured the length of a new rod as opposed to a used rod to see if the rod has bent or lengthened?

Twiggy,

Did you measure the fuel lt after you heard that rough sound?(On .12 or .21)
After 8 lt at the conrod having a little space at the bottom where is the gold cicle.After that lt there is a breaking point at the gold cicle.

:confused:

Nick

itchy b 02-05-2007 02:28 AM


Originally Posted by rmdhawaii
Finally ran the .12 Evo3 STI today and even though I still had it running rich, it was silky smooth and very fast. I was running it with the Novarossi pipe and it spooled up really nicely. This is probably the best engine I've ever had in my car. Two more rich tanks and I can start leaning it. :D

You wait till you race tune it ;)
Then you will see something :D
Make sure that you wear a belt with your trousers ;) :D :lol: :lol:

twiggy 02-05-2007 02:44 AM


Originally Posted by nikoskar
Twiggy,

Did you measure the fuel lt after you heard that rough sound?(On .12 or .21)
After 8 lt at the conrod having a little space at the bottom where is the gold cicle.After that lt there is a breaking point at the gold cicle.

:confused:

Nick

i know it was definately more than 4litres. but my other engine (evo3) has had more than 10 litres through it and the bearings are still fine.
it was a .12

rmdhawaii 02-05-2007 03:16 AM


Originally Posted by twiggy
glad you like it :)
have you tried running it with the sirio 2611 pipe?

I didn't have a chance yet, but will do so when I race again. I was racing a CRF today and also had to do some TZ break-in. I'm trying to do too many things at one time :sweat: - but having fun doing it. :D

Ecleftone 02-07-2007 01:46 AM

2 Attachment(s)
I need to ask a ques, im using a Sirio Evo 1 .12 engine on a FW05rr. I know it needs to use a different type of starter box to accomodate its engine placement.

From the looks of my engine, can it support a roto-start? I dont suppose so right? There's nothing to poke the rotostart into. But the previous owner mentioned that he used a handheld starter. Is there a handheld starter other than sth similar to rotostart that i do not know of?

twiggy 02-07-2007 01:55 AM

you can use a r/c plane handheld starter like this one http://www.modelflight.com.au/buy_mo.../p7260184a.jpg
but you have to replace the cup on the end with a rubber wheel.

Tim Johnson 02-07-2007 04:12 PM

in order to use a drill type starter you would need a pull start style crankshaft. Most starter boxes will allow you to move the motor and wheel from a parallel to a perpendicular position. For instance the Kyosho box will start both on road shaft and belt cars, as well as the big 1/8th off road buggy/truggy. Using a starter box will be much easier than anything :)

http://shopkyosho.com/img/product_im...0/KYO36209.jpg

nikoskar 02-10-2007 12:41 AM

Dear All,

I have a Sirio PR Pro and i am facing problems with the carbulator.
Can you tell me what is the default turns of all the screws?(Middle, Low, High?)

Thanks in advance
Nick

p.s. Sorry for asking so many questions

maskedrider 02-12-2007 12:01 AM

what the differents between a 3port and 5port Evo3 STI ?
cant decide which to get..
as i using Evo2 3port now

its time for me to upgrade :nod:

thanks

nikoskar 02-12-2007 01:02 AM

I think there is only one .12 Evo STI.
S12T3ISTI which is a 3 port engine.

maskedrider 02-12-2007 03:35 AM


Originally Posted by nikoskar
I think there is only one .12 Evo STI.
S12T3ISTI which is a 3 port engine.

it's the S12T5STI which is 5port according to the Sirio site.

dameetz 02-12-2007 05:03 PM

Can somebody give me their clutch setting for low end torq? I m using RRR clutch with Sirio evo3 STI? How much is the end play supposed to be?

rmdhawaii 02-12-2007 06:34 PM


Originally Posted by dameetz
Can somebody give me their clutch setting for low end torq? I m using RRR clutch with Sirio evo3 STI? How much is the end play supposed to be?

Check out the build tips at the RRR Knowledge base for how to set your end play. No matter what engine I use, my end play is always 0.10mm.


All times are GMT -7. It is currently 02:59 PM.

Powered By: vBulletin v3.9.3.9 Patch Level 3
Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.