OK thanks.. So on paper this guy should have me.. Will be a bit hard to tell though as his BXR will be in an MBX6T truggy and my Fire 11 in an RC8.2 buggy.... Oh well, it's part of the fun - seeing how it actually works in real life.. And if he is too fast, I did just send away a Nosram RS.21RR(think Jammin JPX.21) to get modded....

Now we just need the winter to go the hexx away....

Absolutely. Neal does all my engines. I see they went to a 14.5 mm crank. Wonder if they're keeping it like the old style cranks?

To me it looks like the crank is a little different. From the PDF it looks like it does not have the bi-turbo cuts in it like the C6 did, but it has one cut. Will have to wait till I get mine to know for sure.

Worlds S7 Idle issue
 

Good day. I have a RB Worlds S7 that I am running and for some reason, I can't get this thing to stop idling high. I have lowered the idle screw and nothing seems to work. When the engine is cold, it seems to idle low, but, when it comes up to temp, the idle goes up and stays there.

I have had this engine for some time, New front bearing. Engine has less than 1 gallon on the pistion/sleeve. running Odonnell Fuel/Odonnell Glow plug no 99.

I have taken the engine appart, inspected it and all appears fine. Engine was resealed with engine sealant. Carb sealed also. Stills idles high.

At first, I thought there was bubbles in the fuel line a I cleared the bubbles and still idles. Fuel tank was removed and pressure tested for leaks. Non I could find.

Using clear fuel line so, i didn't see any cracks.

Any suggestions??

Can the Buggy 11 piston and sleeve fit in the fire 11 crankcase and work with no problems? I am ordering my fire 11 combo today and just wanting to know..

I found a bad seal on a new front bearing and had the same problem but it would also effect the entire tune of the engine.

The B11 Piston and sleeve will work just fine with the F11 case and crank. Altho the performance will not be as good as you are used to from the F11. The B11 sleeve has a much smaller exhaust port and less aggressive timing. It should run faster than a standard B11 as the F11's crank is more aggressive. If it's something you already have and want to try it out to see how you like it you will be fine, and might find you really like the power-band. Last year I tried the F11 crank in my B11 and really liked it!!! If your curious because you want a replacement for the future I would stick with a F11 P/S.

Is your LSN flush? In from flush? Or out from flush? If you take out the venturi how big is the idle gap? that gap you see should be the same thickness of a credit card.

Also, just because your fuel line is clear does not mean you will see a hole or crack. If it has been sitting for a while I would try new line too cause it does kind of sound like an air leak.

Well, I sent my Nosram off to be modded, and it should be here soon. Can't decide which to break in first - the modded Nosram or the Fire 11.. Gonna have a big track day the weekend after this.. So if the weather holds(not looking good..), I'd like to start break-in this weekend..

For both engines I picked up some hot Picco plugs. Was just looking at them though, and they are a good bit shorter than the RB plug that came in the Fire.... Does this matter?

http://i166.photobucket.com/albums/u...308_100347.jpg

http://i166.photobucket.com/albums/u...308_100308.jpg


Also, what is the verdict with fuel filters? I usually don't run them, as I just assume they are another potential problem.. These engines are a bit higher end though, so I was wondering if I should take the extra precaution..

Nedels for Race tune on a Blast, same as WS7. ?

Nobody can give you an actual needle setting that will be a perfect race tune unless every single variable is the same for you and them.

That engine is a WS7 so if you have a WS7 it should be very close to how that was tuned but may not be exact as the LSN's have slightly changed over the years as well. Once race tuned most of my engines end up close to flush on bottom and generally in from flush on the HSN. I am at high elevation tho so most will not run a HSN that lean.

The most important part is the length of the threaded/tapered area. On the RB plug after the threads it is longer for sure but that stick up above the button, and long and the threads that go into the button are the same it should be fine.

thank you very much for the info Chris, i was curious cuz i am a new driver to racing and some guys are saying the F11 will be too much. So my back up plan was to buy the piston and sleeve of the B11 and that way i could have a 5 port and 7 port..

My bet is that Clocked F-11 has power on a totally different level then that C6 USA...Not that the C6 is a slouch, but that F11 is nasty !!!

I'd like to see some fresh dyno charts on the engines.:rolleyes: :lol: ;)

Since we're on the subject....just got back from my 1st track visit this year. Started with the CRE C6 USA which was running spot on today and then bolted in the CRE Fire 11. Now the C6 is one of my favorites and the F11 was way more than i expected. It's an explosion out of corners. It's the 1st engine i own that actually needs some set screws put into the M2C flywheel, lmao. Probably a shorter manifold also. I was using a 9886/41021 setup. I revved it some when it warmed up and it almost jumped off the damn starter box. What a horse this one is.

1+

I was going to get 2 f11, one buggy and one truggy when I was talked out of it because of the power it was supposed to have. I am glad I didn't now because it is almost too much for the truggy. This is one wicked little powerhouse. I am running 198/2045 pipe combo and not only does it have legs but the bottom end is enough to keep up with the e-truggies.

pipe ?
 

Hey fellow rc racer"s....Wad pipe would B good 2 put/run on the RBSHARK motor,gonna put it in a MBX6 Buggy,
thx,

What version of the Shark do you have? 9 or 10? As for pipes there are a number of pipes that should work well. I try to avoid any of the JP pipes myself as they never seem to provide very good mileage for me. The RB 2045, 2087 both work well. Any version of a 2058 pipe works well, as will the 2013. Many of the 9886 or 086 pipes work as well as the 9853, 053 pipes. Really depends on what you run it in and the powerband your looking for.

Need new engines...
 

Haven't raced in couple years... But used a WS7II modded by CEO in the buggy and a C6 in truggy. What would be the comparable engines to those now?

They just came out with all-new engines - the BX and the BX-R - the latter would be the new top-of-the-line C6 equivalent I guess..

For buggy the older B6 maybe? They're in the process of updating their whole line. They came out with the Fire 11 last year, and have updated it again for this year - the RB Fire. Maybe the most powerful in their lineup? But not all the goodies of the BX-R..

Here in Germany they have some special edition engines that are supposedly similar to the old WS7II, but they're not sold in the US afaik..

The fire is a very stout motor for the truggy. I have one modded by rick at rb mods and it has proven to be a very strong engine. Too much or a buggy, I tried lol. I am still running a ws9 in the buggy with a few of the ws7 you refer to on the shelf. As far as the bx and bxr, they are the ws7/9 with the difference of the r having a ceramic front bearing. They are the european made motors which is a plus over the previous motors they have put out.

Thanks for the replies. So it looks like a F11 for truggy and BXr for buggy. What choices are there for modding RB engines these days besides RB Mods?

Clockwork Racing Engines,
http://clockworkracingengines.com/

Maximo(Neal) has a thread in this section of the site.
Give him a shout, he will Clock your RB engine for ya.
I've got to warn you though, Clocked RB engines are
known to put a big smile on your face, turn heads
at the track and cause jaws to drop on people you
don't even know. :lol:

What venturi would be recommended for racing a Fire 11 in buggy? Guy on a German forum is asking - is getting 7:30 with a 9mm venturi and wants more run-time..

7mm is always my all around favorite. Need to also make sure you limit the throw after going from the 9 to the 7. If he leaves it opening as far as it was with the 9 he won't see much improvement.

What glow plugs are you guys running with the Fire11?

I am currently running Odonell 97T plugs.
I am also looking for more run time, currently have the oval 7mm venturi and getting around the 7.5-8min run time.
Was thinking of giving the 6 mm venturi a go aswell.

The F11 isn't going to be a great fuel mileage engine in stock form. How much fuel do you have thru the engine? What are your temps? Do you feel you have it fully leaned out and running the best it can? What pipe do you have on the engine? Also, in general the cooler plug you run the more spot on you will have to be on the tune which can in some cases yield better mileage because many times people are running rich and they don't realize it. If the plug is too cold you will know because it will want to constantly load up and die.

good day, i need replace my old plus 21 4C, an i see a X11 o F11, please need coments about the botton end, of this engines.

i like a engine with good booton end, but the F11 is good choice for the price, but i like the prestations of the Plus 21.

but i like RB. i need choice one.

I have never owned a +4 but have driven a few and helped tune a few. I would say the X11 is close to the same as the +4 when it comes to bottom end. IMO the F11 has more bottom end than both.

thanks for the answer,

is to big the diference, in botton end, in plus 21 4 Vs RB X11?? if the maximun calification is 10, please rate both engines.

If I was going to rate them on a 1-10 scale for bottom end I would do it like this.

X-11: 5
+4 : 5
F11 : 7

That is just my opinion and what I have experienced. I have never owned a plus4 to be able to try numerous pipe/header combos to get better bottom so maybe the +4 is actually better than a X11. This is just based off of helping local folks running a +4 and was always on a 9901.

hi guys wondering if i could use nova connecting rods to the rb engines like the fire11 for example?

I would not do it, the Nova and RB have slightly different crank pin sizes which would make that busing at the bottom of the rod slightly different as well.

My ongoing search for a deal on a 2058 pipe for my Fire 11 is not having much luck(nobody seems to run them over here..) Have found a deal on a 2013 though.. How should that match up with the F11(in general, and then in comparison to the 2058)? If anybody also happens to know how the 2013 should work on my Argus and modded Jammin JPX-21 I'd be keen to hear that too..

The 2013 will work great on the F11. It will have more bottom end than the 2058 and it will sound AWESOME!!!

RB makes a great engine. Why so little talk about them? Are they not being used?

It normally picks up in here as the race season gets into full swing.

Thanks Chris. Even in the summer it's still pretty quiet compared to others.

RB makes just as good a engine as any.

RB seems to have had a rough go in the US over the years.

They are great engines indeed!!! I think they have been hard to get and expensive here in the US which has made them not as popular here as other countries. The US distributor has changed a lot since I started running RB 7 years ago, now that Jim at Fusion took over maybe he can help them gain some popularity around here.