This would be the first time running RB. What do you guys think of the WS9? Also, what would be a good pipe to run with that motor. Would it be good in a losi 8ight b and t 2.0? i would be getting 2.

What are you running it with? (pipe, nitro%, clutch). My C6 has been running anywhere from 230-260. There are so many variables that effect engine temp and performance. If you got plenty of smoke and no lean pinging after you come off a full speed pass I would think you are good to rippppp! I would just be careful you are asking alot of a 3 port to hang with the bigger engines.

Is there any consensus on the head clearance for a C6? Not shims, an actual measurement. 30% fuel.

Thanks.

The WS9 is a beast! My buddy has it in his MP9 and it flies with the
2045/198mm header. If money is not a issue you can't go wrong with the 2045 pipe! Putting the 2045/198mm combo in a Losi 8ight you may have to bend the header a tad to get good clearance away from the fuel tank. I easily bent mine with two craftsman nut driver put into each end of the header.

going to buy a truggy soon just looking for some info on the rt9 maybe someone who has one or ha seen one run. fuel consumption power durabilty. THANKS

You can use 3/32 solder, pull out the glow plug, insert slightly bent solder into plug hole, bring piston up to top dead center, and back down, then measure the thickness of the solder, it will give you deck height, I'm not sure what factory deck height is.

My Hobby 9 has been running good at around 250degrees, has a good amount of power with the RB 2045 / 198mm pipe. With my driving, I get around 10 - 11 minutes on a tank.

I have about 1.5 gallons through the engine and it still has crazy pinch, so much so that I sometimes need to heat it with a heatgun before my starter box will turn it over.

I picked up a WS9 that I was planning on running next year but for now, the Hobby 9 is going strong. Might need to sell the WS9 at this rate. :cry:

Greetings all,
Been running an S3 very happily, runs great but a little too slow for my competition. So I have purchased a B9, just put the engine in to start the break in process and realized the idle screw is about 1/4" or more screwed out, as this is the first time running this engine is this normal?

Thanks

Yes it is normal every C6 (B9) I have ever had is like that. The carb is designed differently and better then the "S" (Junior,Hobby,Series) line.

ya I hate how the idle needle is on the botton part of the carb on the sport line engines

Over priced con rod!
 

Hey Guys, I'm running a modded S7 and C6 and they are getting in need of conrods. At $61 plus shipping plus wrist pin and clips, the cost would be about $100 per engine. That's a hefty chunk of change, about the most in the industry. I heard there was a substitute con rod from a Nova or a Go tech that works just as well in these engines. Does anybody have knowledge or experience with this? Thanks for the help.

I have had RB engines for about 10 years, your money ahead by buying factory parts, it will fit best with the best quality in materials, you can try other brands that may fit, but when you have a bushing in the rod go out, if it's the wrist pin bushing, you will most likely need to replace the piston when they go, if the bottom bushing goes out, good chance cracking the engine case.

I believe a Novarossi R7 rod will work fine in your C6. It's probably the same part, as that RB engines is made by Novarossi. Not much cheaper than the RB part though. I don't know about the S7...

quick question:

is it normal for a ws7ii to run in the 280-290 degree range?
both my buddy and i both have these engines and they seem to run fine with good smoke annd no bogs, just hot.

thanks

Cool thanks for the replies guys.

Figured out the B in B9 stands for beast,damn but this engine is looking fast.
Done my 10 tank break in and getting ready to get my tune done.
Screw settings seem to be extremely sensitive to even the smallest adjustments, so this may take me a little longer. Not that this is a complaint, it was one of the easiest engine I have broken in. And I have broken in plenty.

Looking forward to the racing this Sunday, hopefully the weather will stay clear

I just broke mine in yesterday also. It was one of the easiest break-ins I have done. I have 8 tanks thru it so tomorrow I will get a race tune at the track.

It depends on the temp gun your using, if it's a raytec gun, thats normal, if your using an exergine temp gun, thats hot.

Hey everybody I got my "Killer 9" in today. It looks pretty mean. Can't beat the price either for about $230.00 They changed alot on this engine, carb is all composite with needle settings of 4 and 4 and the idle screw is to the back and flush in the carb and aluminum 8mm insert. I didn't open it but looking in the exhaust port it doesn't have the 2 little exhaust ports that the C6 has. I'm excited to get it but I won't be able to run until next weekend. I'm not going rush break in for Sunday. I have 3 paint jobs to do tonight and tomorrow.:p

BTW I ordered two and got them both!

My favorite engine on the planet. If you run it a little lean on the bottom and a little rich on the top, the temps will go down and the performance/mileage will go up. It ran hotter on 20% fuel than on 30%...but the track your running on makes a difference.

I would say yes. My hobby 9 runs at around 270. With the same plug I broke it in with. Don't tune with temp. Tune with sound.

Hey guys, I got a WS7II and run a 2045 pipe and 198 header on it and love the combo, going to get Houston Engine Services to build me a Novarossi 21-5K and he suggest a Ofna 063 pipe, my question to you is how does a 2045 compare to a 063? I thought the 2045 was the best pipe for a 5-7 port RB engine, and RB's are made by Novarossi, so would my 2045 not be a great pipe for the 21-5K ?

thanks guys

engine seems to run good, sounds healthy.

btw raytek gun is 1 degree off from the exergen. or is it the other way around?:)

I use to use the laser raytek and with the raytek it varied from 25+. I think it reads lower than the exergen.

Ran the B9 today... WOW 2 1st places and 1 3rd. Broke shock eyelet, in the last 2 mins of the race.

This beast was lapping everyone, I am extremely pleased so far.

One quick question tho, after running for about 10 minutes, I would go in for a refuel and the engine would splutter and die, I know this is my bottom end needs to be tuned, do I richen or lean?

Thanks

I ran my new B9 yesterday also, what a Hoss!! The power curve comes on smooth, not light switchy, but pure brute power.

Took 1st, 2nd, 1st in the heats, broken a clutch bell in the mains. Love this mill.

:rolleyes: yeah yeah the AMBUSH CREW is finally glad your not a grouchy mOfO anyMo

Does anyone have any info the Rally 9 engine?
I am considering this one for my buggy.

Oh well...was gonna get two Nova engines but the guy backed out of the sale:rolleyes:.

Went ahead and got the Rally 9 for my D8T and Killer 9 for the D8.
Fingers crossed....hopefully these two engines do good for me.

You won't be, I have used RB engines for 8 years, still using my WS7 thats 6 years old with original piston and sleeve, changed out the bearing and conrod, about 8 gallons of fuel thru it, it pulls away from my sons C6BBT thats modded. just take care of it, make sure you keep the air filter tight, so it does'nt suck any dirt .

Here they are!!! I like them both, only wished the Rally 9 had the idle set screw on top...but its no biggie.

RB Concepts Rally 9
http://i29.tinypic.com/2rw83lh.jpg

http://i25.tinypic.com/qsjwvs.jpg

RB Concepts Killer 9
http://i28.tinypic.com/72vjex.jpg

http://i27.tinypic.com/15fj1he.jpg

Looks good...

Did you figure out why the Rally 9 is cheaper than the Hobby 9? Only thing that I see if that the Rally 9 doesn't have the L2G head.

dont know why its cheaper but its a different engine for sure
bore and stroke are different as well as the Rally 9 being a
turbo plug engine

Well break them in and lets go to Indy soon.

Neat... Break them both in and let us know which you like better. :)

I am trying to round up some racers to go to Granbury this weekend.
They have just enlarged their track in it looks pretty fun.
I dont think it will happen but I am still trying hehehe.


Will do...they both will have a nice home but as long as they both run good I will be happy!!!

Amain has the killer 9 for $230 right now. I thought this was going to be a high dollar race motor. I payed that for my H9. I should have waited and got the K9. What are runtimes like H9 vs K9?

Nope, both the Killer 9 and Hobby 9 are being marketed as RB's sports line. Check their website...

I don't get much runtime on my Hobby 9, around 8 minutes on a tank.

Does anyone know if the Killer 9 is a Novarossi based
engine? The case design doesn't look like any of the
other Novarossi or Sirio based RB engines that I found
pics of.

the Killer 9 looks more like a high end sport mill. The carb is different from the 'regular' sport engines ie: Junior 9 Hobby 9 Buggy S9(all of which have the same carb).
It also looks like the backplate screws are hex and I think the head screws are also hex?

Killer 9...all hex screws except the idle set screw. The carb does look abit different from the standard Novarossi/RB Concept carbs. Crankcase does look different but I am not sure what base its from. Its pretty though hehe...so lets look at it again.

http://i28.tinypic.com/72vjex.jpg