Sirio Plug
 

If your using 25% nitro please use sirio no. 7 plug. If your interested to get one go to this web site
www.dogboneind.com

It is after market product ( it used on all world champions in airmodeling). I make them. If you want to try give PM.:nod:

First let me tell you that Sirio engines have their power band at a higher point than the traditional Nova based engines, so in my track experience I found that to get this engines "singing" you have to use shorter gear ratios. For example in my Yokomo I use lets say 48-45 spurs with Nova engines, with my Sirio I have to use 49-46 spurs (1 tooth shorter), and then the engine really rocks and has an incredible low and top end.
With respect to the pipe, it depends what model of NR inline you have. I personally found that the engine works best with Sirio's own in line pipe S12 200006, or the Yokomo M Mielke in line pipe.

Hope this helps
AFM

vones: thats odd, I thought I had tried fitting a standard OS plug in my standard Sirio and it didn't fit. As far as I could tell, the threads wouldn't even catch so I could start screwing it in. I'll try it again, but it didn't seem like it they would work.:confused:

suntok2: I'll take a look at that site......thanks for the suggestion.

:cool:

I'm using the turbo Sirio 5 port AAC, with OS turbo plugs....as for the standard Sirio, I'm not too sure abt the plugs.Cos in S'pore most of us use turbo engine :)

thanks everyone for your advise.
i will do more testing this coming weekend ! :D

OS plugs will fit the abc engine (mine is a 3port). i use the a5.. have not tried anything else yet but will be replacing my plug soon..

well my OS A5 plug just drops right into the plug hole on my 12TRP. The hole seems to big for the plug.:confused:

Yeah, I just confirmed it, I pulled the plug button on my new (blue head) 12TRP and the plug hole is simply too big for OS plugs. I'm not sure how you guys manage to use them, but no luck here for me.:sweat:

Looks like the choices still remain:

Nova Rossi
Sirio

I'll probably just go with the Nova Rossi since TowerHobbies has them instock.

Again, thanks to everyone for all the input.

Glow plugs
 

I have no expirience with OS plugs, but got some very good results from O'Donnell glow plugs. We tested on control line combat and results just more then perfect. Ob that engines we use verry high compression ratio and no one plug blew up even using during "carusel" type of competitions ( 10 teams within 30 minuts non stop fight).

Never seen anyone using O'Donnel plugs before.

But heck, I guess you learn something new everyday. I thought for sure that all glow plug threads were the same size. But the plug hole on this new engine of mine is quite a bit bigger than the OS plug.:confused:

Okay, now I'm really confused???
 

I just checked the specs of the NovaRossi plugs on TowerHobbies. The listing there says that the plugs have a thread size of 1/4". This is the same size as the threads on the OS plug. The only difference, I believe, is how long the threads are(OS plugs are a little shorter).

So if the OS A5 plug I have is too narrow for my plug button, how will the NovaRossi plug fit?

Am I missing something here?:confused: I'm starting to think that the plug button that came with my "legal" engine is actually a turbo button. The same thing happened to a friend of mine who tried to order a "legal" Sirio about a year ago.

Heres the specs that I measured from it.

threads-7mm~a little wider than 1/4"
-then the button tapers down to a 5mm opening at the bottom. This seems to me that it is a turbo button, am I wrong???

And if so, how the heck will I get a legal button for it!?!

Sorry for all the plug questions, but this is really confusing me...:weird:

Hey Darkseid

The best way to check visually if you have a standard or turbo button is to do the following

Remove the plug from the engine, then remove the button from the engine. Look straight down where the top of the plug would normally be, if the hole is clear and threaded all the way to the end it's a standard button.

If you look down and see the thread end then a taper on the button it's a turbo plug.

Another way to check is to measure the width of the thread in the button if it's the same on either side of the button it's a standard, if it's bigger on the plug side than the piston side, then it's a turbo button.

Sounds like you have a turbo though from what you say.

Then I definitely have a turbo button. Thats really not a big deal since a standard button only runs like $9.81 at TowerHobbies and I wouldn't mind having both.

My big concern is finding out if this is actually a legal 3 port engine and not an illegal 5 port.

How can I find that out?

The only physical way, is by taking the sleeve out of the engine and counting the number of ports it has. 3 transfers plus 1 exhaust is a legal engine. 4 transfers and 1 exhaust it is illegal. 3 transfer and 3 exhaust it is illegal.
As for glow plugs choose the right one according to a chart i printed sowher on this post regarding a .18 Sirio, the .12 use the same. The chart is for standard and turbo heads.

Good luck
AFM

Well I found out that it was in fact a illegal 5 port turbo engine. I got in contact with the shop I ordered from and they're going to get me correct engine out to me in a few days.

I also told them to feel free to look inside the Sirio box and take a look at the plug hole. A quick check to make sure its a standard plug port will make sure that I don't have turbo engine!;)

Should have my new.........new engine in a few days.:cool:

Wow! a five porter for the price of Three, and you returned it?:weird: Well, a 5-porter is alright if your local track permits it, have to check with the rules there.

But it is indeed illegal for Ifmar or any associated bodies sanction races until they change the rules on that.:)

Anyway, Enjoy your new 3 port Sirio, this is one fast engine too..................:)

[QUOTE]Originally posted by afm
[B]PACMAN 25

I have a SIRIO S12 EVO2, and as with all my previous engines I've used this tip with success. Every engine and carb is a whole new story.

absolutely right PACMAN 25
:tire: :tire:

Arrgghhh the frustration :)
 

Hi People..

I have some problems with my sirio .12. It was stopping randomly and also leaning out while on the track. Leaning out has been fixed by using a novarossi carb but its still stopping randomly.

Today after not being able to fix the problem (sometimes it goes 3mins, othertimes 7mins etc) I did some dohnuts/powerslides and noticed it stopped straight away after getting off the throttle. I restarted engine and repeated the dohnuts/power slides got off throttle and engine stopped again straight away so it seems if engine is under a lot of load while throttle is open its (no idea - you got a theory?) doing something anyway. But I can do a high speed WOT and it does not stop :weird: :weird: :confused:

Too much/not enough pressure line? aggh going crazy lol..

So what dumb thing am I doing wrong ? :) (Man my .21's are soo much easier!!! lol)

Well I'm one of the people who run the local track. So I'm well up on the rules!:lol: We would allow an engine like that, but we really don't encourage them. Its really too much for our track, which is big, but not HUGE. Besides, it wouldn't really look right discouraging others from getting illegal engines while I run one myself.:sneaky:

Also, we have another local track that last year managed to secure a Roar regional race. I didn't get to attend last year because I was out of town AND low on funds! If they get it again this year, I may actually compete, so I want a legal engine in my car when the time comes.:nod:

Re: Arrgghhh the frustration :)
 

You mean, the engine died after you braked? Anything wrong with the clutch? Or some parts may be binding. :)

My thumbs up for You!:nod: :nod: :nod: :) Good luck on your races.......:)

Re: Arrgghhh the frustration :)
 

What carb settings do you have HSN, LSN (turns open from closed)??? I would suggest you start again with 5.5 turns open fror the HSN and 2.5turns open for the LSN. and from there use Josh Cyrul's tuning guide in Trinity's web page, under tips.
What glow plug are you using?? I'm using C7S for non turbo engine. If you have a turbo engine use C7TGF. And if you are using the right plug, try changing it for a new one, sometimes plugs do tend to open (fail) under WOT.
Pressure line should be between 10 to 17 inches long.
Good Luck
AFM

x_man I was thinking the same at first but no everything seems fine, I was able to recreate the stall a bit easier today (read below)

Thanks for info afm, Those needle settings for the Sirio carb or the Novarossi one (I am now running the nova carb)

I Decided to play with the fuel/pressure lines today, I made them both really short and after WOT a few times (this is while sitting on starter box) the engine was stopping. Its seems like there is too much pressure in tank after WOT and floods engine at idle (Is this possible?) A few times I believe I stopped it from stalling by pinching the fuel line so my current line of thought is too much pressure in the tank after WOT.

My pressure line was originally 13 inches long, I think I will go a lot longer tomorrow and see how I go..

Ive tried Hot, Cold and Med OS glow plugs, currently back on the Cold ones...

Thanks for the replies. :) This thing is getting me really :flaming: :cry: :cry: :flaming: lol..

that's the problem with the original LD3 fuel tank !

Re: Arrgghhh the frustration :)
 

Try to lean the low neddle or clean the carburator

Manticore, your serious? the one with the felt seal? so If I swap over lid with the rubber seal it will help? hmmm you kidding.. im gonna go slap myself silly.. lol.

yes, i had the same problem with the felt seal which comes with the pro kit. after getting the rubber seal. the problem gone. besides, the pipe that comes with the kit is kind of shitty. that creates too much back pressure.

Dude, if this lid thing does the trick I owe u big time.. I'll swap the lid over tomorrow..

Yeah the pipe does make a LOT of back pressure so I say I will still need longish pressure line..

there must be a reason for a new lid !! damn you should put on the new lid in no time when you got it ! :ha: :ha:

Those needle settings will work fine for either carb as a base line. Once you change your tank, as recommended by Manticore, and fit the longer pressure line, stay with the equivalent plug to the Nova C7, and then I insist you follow Josh Cyrul's guide on tuning engines, available at Trinity's web site under tips.
AFM

Ok, Ive tried everything so next is a Novarossi C7 plug.. Just got to order some in :(

Maybe the OS plugs (being shorter I believe??) is the problem..

OH!!! definetely, if your engine is a Non-Turbo head engine, OS plugs are shorter than the Sirio and Nova plugs, there is your problem. You could order O'Donell 77 or 99 also, from what i've read they are supposed to be the hot ticket, i've orer some to try.
AFM

I'm soo stupid :D I thought "Normal" ment Normal, I didn't realise OS's "Normal" was different to another brands "Normal" until being told via the fourms. LHS only sells OS plugs (Or I would of got some a long time ago when first recommended) so I have just ordered some Novarossi plugs online.. I hope thats the problem, it wouldn't be helping anyway.. Well ya learn something new every day :)

Hey, Take it easy Man, there is always a first for everybody!:) :nod: :blush:

what is a good pipe & plug to use on a sirio .15- 5 port using 20% nitro. Thanks Paul

If your engine has a std. head go with Nova C7S or C8S plugs.
If your engine has a turbo head go with Nova C7TGF or C8TGF.
as for a good pipe, check this site and pick the pipe that suits your need. http://www.rbproducts.com/rbww/engines2.5/indexrb15.htm

Hope this helps
AFM

S21-PR Pro
 

Hi,

Anybody runnning the new version of the S21-PR Pro? It has a BLUE cooling head.

I'm thinking of getting one of these engine but I've heard there were problems with the carbs?

How would this engine rate against a Novarossi R1-WC?

Any info. appriciated.


All the best

Kevin

Bruckner hobbies screws me again...
 

Well, looks like my wait for my replacement engine will take longer than I thought. I was told that my new engine would be shipped out today by express mail so that it would reach me on Saturday. Now I found out that the person I spoke to, and apparently the ONLY person they have there that is capable of shipping anything, wont even be in until next Monday!:flaming:

So I guess I will have to wait till Monday and hope that this guy didn't forget that he has any other days off!:rolleyes: This was my first order from them.....probably will be my last. First I get the wrong engine.....now this.....<sighing>...

Hopefully I will get my new engine sometime!:rolleyes: :flaming:

No good Darkseid, It really annoys you when things get mucked up but I guess "it happens".. :(

Just a note re: my problem with sirio .12, while I wait for the novarossi plugs.. I found this on the nitroreview site under a pico .26 review. Looks like the same problem I have with my sirio.

"nice engine had problem with it loading up with fuel, i later found it was my glo plug i was using too short of a plug. great power. "

So things are looking good :) :) :)