Sirio 21 CL7B STI Engine (Full Version)

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shankdog626 -> Sirio 21 CL7B STI Engine (4/21/2008 11:44:25 PM)

Thinking of buying this motor, anybody know the benefits or drawbacks ?
Seems like most of the good racers are using it lately.



nascardad24 -> RE: Sirio 21 CL78B engine (4/22/2008 12:36:32 AM)

Its insane, and just right for a truggy. Great low end torque, due to the long stroke, great top end, run a hot or super hot OS turbo plug. It does come with a standard button head too, but most run turbo. This is the sirio clb7 sti engine, I would think that the standard clb7 version would be a strong runner but the sti has the extra touches.
Im running mine with the sirio 2013 pipe.



shankdog626 -> RE: Sirio 21 CL78B engine (4/22/2008 4:08:35 AM)

Thanks for the input and confirming my next purchase of a motor.
That is, until the next best thing comes along [:D] !

I'll definitely look into the sti version of it.



rageworks -> RE: Sirio 21 CL78B engine (4/22/2008 4:20:36 AM)

The '08 version of that engine will be coming out soon.
I here it will have a ceramic rear bearing, larger lower
con. rod bushing and a bigger con. rod pin on the crank.
Also the case will be powdercoated in black.



slayerphonics -> RE: Sirio 21 CL78B engine (4/22/2008 2:18:59 PM)

quote:

ORIGINAL: rageworks

The '08 version of that engine will be coming out soon.
I here it will have a ceramic rear bearing, larger lower
con. rod bushing and a bigger con. rod pin on the crank.
Also the case will be powdercoated in black.


2008 version is already out, I orderd mine from amain, thinking I was getting the 2007 but I was sent the 2008 model.

here is the link

I'm using a Sirio S7 plug, amain was out of hots. But this plug is working great

I am also using the sirio 2056 pipe, (the baseball bat shaped one)

This engine is fast, It replaced a .28 engine in my truggy, The sirio motor throws my truck over every jump the .28 could but with an 11 min run time, with the stock vent.

http://www.rcuniverse.com/forum/m_7360330/tm.htm



shankdog626 -> RE: Sirio 21 CL78B engine (4/22/2008 7:58:15 PM)

Why does A Main list it as a "competition buggy engine" and how does one know which model
08 (black case) or 07 (silver case) version they're gonna get ?

Best pipe for it ?



slayerphonics -> RE: Sirio 21 CL78B engine (4/22/2008 8:49:26 PM)


quote:

ORIGINAL: shankdog626

Why does A Main list it as a "competition buggy engine" and how does one know which model
08 (black case) or 07 (silver case) version they're gonna get ?

Best pipe for it ?


That I don't know, I was happy i got the 08,

People will say get a high end pipe to help with the top end since its a bottom end motor,
But i figure why not help the engines strongest point, so I went with a low end pipe.
My track only has 1 long straight, think its like 180 to 200 feet, and the engine/pipe combo never tops out

I'm using the Sirio 2056 pipe,




rageworks -> RE: Sirio 21 CL78B engine (4/23/2008 12:42:10 AM)

I would like to try that pipe out on a few of the motors
that I own. How does it sound and how is the top end?
It sure has a shape of it's own.



slayerphonics -> RE: Sirio 21 CL78B engine (4/23/2008 4:02:59 PM)


quote:

ORIGINAL: rageworks

I would like to try that pipe out on a few of the motors
that I own. How does it sound and how is the top end?
It sure has a shape of it's own.


Its actually kinda quite compared to the JP pipes, it is race legal, but has that nice pinging sound when the motor is reving high,

I'll get a video up this weekend, maybe I'll get some video tonight, its practice night at the track



shankdog626 -> RE: Sirio 21 CL78B engine (4/24/2008 7:17:17 PM)

http://www.amainhobbies.com/product_info.php/cPath/1_23_32/products_id/20168
or
http://www.amainhobbies.com/product_info.php/cPath/1_23_32/products_id/23179

I'm confused because one person said it is an all around great motor with low AND top end
power then one person says it only has low end power.



slayerphonics -> RE: Sirio 21 CL78B engine (4/24/2008 7:48:27 PM)


quote:

ORIGINAL: shankdog626

http://www.amainhobbies.com/product_info.php/cPath/1_23_32/products_id/20168
or
http://www.amainhobbies.com/product_info.php/cPath/1_23_32/products_id/23179

I'm confused because one person said it is an all around great motor with low AND top end
power then one person says it only has low end power.


I'll get a video up for you,

I say it has a great bottom. That person prolly had there clutch engaging to soon



rageworks -> RE: Sirio 21 CL78B engine (4/25/2008 1:06:53 AM)

That was why I asked about the sirio 2056 pipe.
Because different pipes and header lenghts will
alter where in the r.p.m. range a motor puts out
it's torque and h.p.. I'm sure that if you put an
086 pipe on this motor it will keep pulling way
up in the r.p.m. range.



shankdog626 -> RE: Sirio 21 CL78B engine (5/9/2008 10:06:30 PM)

So besides getting the motor, pipe and manifold, what else will I need to
get for a motor change?

Do I need to buy new clutch parts (bell and shoes) and if so which ones ?

Dumb questions I know but I have no idea about switching out and what works
with what or if the new engine comes with clutch parts.

Slayerphonics, did you ever get video ?



nascardad24 -> RE: Sirio 21 CL7B STI Engine (5/11/2008 2:46:46 AM)

Mines set up with ofna shoes and flywheel and a 13/14 bell (vented also ofna). Use new shoes, springs and bearings, bell can be used as long as its not overly used. Grab the blue aluminum shoes, 2 gold springs and one black spring.
I just grabbed the last one fron a main, I talked to the live support through there chat and they dont have the black case ones in, and wasnt sure when they would get more in, black case or silver. Its a insane engine, would highly recommend the 2013 pipe.



shankdog626 -> RE: Sirio 21 CL7B STI Engine (5/11/2008 4:47:39 AM)

cool thanks Nascar dad. I just grenaded my current engine on the track today.
Talk about no compression? I can roll my motor over by hand. No Pinch
whatsoever. OUCH!

I have no idea why guys at thrack are trying to talk me out of getting this motor?

If one good thing came outta today is I got plenty of experience pulling the motor
to reseal the carb and worked on my clutch (which the bearing was blasted apart)
[:o]



nascardad24 -> RE: Sirio 21 CL7B STI Engine (5/11/2008 1:45:39 PM)

The cl7b has a sound unique to its self. In a croud of 12 truggies, you can pick yours out just by the sound alone, unless everyone eles has this engine.
What truggy you putting this in? Im just running that clutch set up because its half the cost of kyosho (strr) stuff. Ofna set up might not work on say a losi or mugen so check before you buy all the stuff, your good to go if its going into a kyosho.
Dont let anyone talk you out of this engine. With a 25 dollar off coupon and a 299 price tag, (274 total) its almost impossable to beat. I wrote a few review on a main on a few of the engines Ive owned and this engine is by far the best so far and its going to be hard to talk me into buying any other engine.
I'll get videoo this week, and for sure on friday night. We have a kyosho sponsored driver at the track that runs these engines and just to see him set the power down is amazing. I'll see if I can get some break in video of mine too.



shankdog626 -> RE: Sirio 21 CL7B STI Engine (5/11/2008 5:31:20 PM)

my st-rr is the truggy I'm putting it in. I fear the only reason
why people try to talk people out of what they is they don't
have it for themselves. Yeah, I saw AMain is showing the
08 version (black case) and the price went up to $319 but
that still sounds very reasonable to me for such a good mill.
Unfortunately, it looks like a lot of people are catching on because
those 2 pipes are backordered....booo. (2013 and 2056).

Anyway, I've made up my mind and am ordering it today.
Thanks for the help !



nascardad24 -> RE: Sirio 21 CL7B STI Engine (5/11/2008 11:34:26 PM)

the werks 2013 pipe is the same as the sirio 2013 pipe. Thats cool, strr and the ofna set up with clutch flywheel and shoes will work. My local hobby shop has a few of the black case engines and they are hard to come by. From what they have said the olny diffrencs between the 2 is the rear ceramic bearing. After 2 or 3 gallons I replace both bearings anyway.
Glad to hear theres another clb7 soon to be running, more feed back for those who doubt it performance.



nascardad24 -> RE: Sirio 21 CL7B STI Engine (5/12/2008 12:48:33 AM)

The black case sirio is in at a main, 319. Looks like mine was the last silver case now the 08 are out. Either way its a hard engine to beat.



shankdog626 -> RE: Sirio 21 CL7B STI Engine (5/12/2008 5:47:31 PM)

Can I run a JP-4 pipe on this motor as well ?
I've heard people say this motor comes with a standard and
a turbo button head. Does this mean I have to buy one or the other
depending on which one it comes with ?

So confusing, sorry.



supertib -> RE: Sirio 21 CL7B STI Engine (5/12/2008 7:11:08 PM)

I would run a 086 tuned pipe on this motor...the OFNA 086 to be exact..... stay away from any of the EFRA pipes are they will be extremely restrictive on this motor..... the 086 is cheap and will unleash 100% of this motors potential power, something not many other pipes can do..... another good pipe is a MSR 1005, but I prefer the OFNA 086........... Also the OFNA 086 is extremely loud, much louder then anything short of a T-32.....the DPM 086 is much much quieter and doesn't make as much power..... I love the OFNA 086, it is insane sounding !!!



slayerphonics -> RE: Sirio 21 CL7B STI Engine (5/12/2008 7:16:05 PM)


quote:

ORIGINAL: shankdog626

Can I run a JP-4 pipe on this motor as well ?
I've heard people say this motor comes with a standard and
a turbo button head. Does this mean I have to buy one or the other
depending on which one it comes with ?

So confusing, sorry.


It comes with a standard button, with the turbo button installed,




shankdog626 -> RE: Sirio 21 CL7B STI Engine (5/12/2008 8:46:24 PM)

Thanks Slayer,
I order the motor today. I'm hooking it up with the JP-4 pipe
I like that pipe plus it's a good middle and top end pipe since
it said to be a good low end motor.

Any suggestions on the break in ?



slayerphonics -> RE: Sirio 21 CL7B STI Engine (5/13/2008 5:51:16 PM)

quote:

ORIGINAL: shankdog626

Thanks Slayer,
I order the motor today. I'm hooking it up with the JP-4 pipe
I like that pipe plus it's a good middle and top end pipe since
it said to be a good low end motor.

Any suggestions on the break in ?



I did the heat cycle method, i've had very good results with that method,

Thing I liked the best about this motor, is that it responded very well to changes on the needle, Some motors you turn the highspeed 1/2 turn and there is no change in the motor.

I went with a low end pipe with this thinking, If the motor has a strong bottom, why not play on its strongest ability, and change the gearing to match,




supertib -> RE: Sirio 21 CL7B STI Engine (5/13/2008 5:54:59 PM)


quote:

ORIGINAL: shankdog626

Thanks Slayer,
I order the motor today. I'm hooking it up with the JP-4 pipe
I like that pipe plus it's a good middle and top end pipe since
it said to be a good low end motor.

Any suggestions on the break in ?




the JP4 works okay..but you will see a signifigant improvement over the JP4 if you got a 086 or 053..the JP4 will kill the motors upper end power..... Jp4 is a EFRA noise restriction pipe, not a power pipe......... most people who tried the JP4 ended up removing them because they felt it lacked power ( I agree ) .......... On almost every motor avaiable the 086 tuned pipe makes the best power and powerband...the odd motor likes the MSR 1005 or 053 better, but as a general rule a 086 should be the standard of tuned pipes....



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