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-   -   RB Concept Engine Thread.. (https://www.rctech.net/forum/offroad-nitro-engine-forum/251409-rb-concept-engine-thread.html)

aznitronut 02-21-2010 09:03 AM


Originally Posted by RoyJ (Post 7034821)
It's lean out of the box, for easy cold/new starting. Once you race tune it, it should not sound as lean. Just take it easy at 75-80% (max) until you get at least a gallon on it. Then it will really comes to life.

My K9 needles are currently at about 1mm in from flush on top; 2.5mm in on bottom. I'm running in a dry 40-50 deg F climate. I use the OD97T plug for an all-day spitting idle. If you use anything hotter, like an OS-p3 it will run lean.

Thanks

koreanassasom 02-22-2010 04:52 PM

took my O'donnell Zo1-t and RB B9 2045 pipe combo to Motorama this weekend and man was I happy! I started the day with the carb HS needle at a about 1.5mm above flush and the low speed in a bit from flush maybe 1.5mm or so. it was low lean idling on the low end and i had no top end when my practice started so i turned the bottom out to flush and the top in a few hours and it ripped low-top end was great. i had to lean the bottom 3 more hours so it is barely in from flush. i am very happy with this engine i ran a 7 minute qualifer and had 40 % of my fuel tank still full, 11 minutes maybe;) i ran the OD 97t plug, great plug!

Chris Peralta 02-22-2010 09:27 PM


Originally Posted by aznitronut (Post 7009356)
Chris, I ran the C6 I was talking to about last week, went with the needles almost flush as you suggested, temps went to about the 230 range, perfect. next question, how about the Killer 9, what are needles on that looking like? If you do not have one, any help out there is appreciated, temps are decent, still real new, maybe 2 fuel bottles, but, just isn't right, sounds lean, plenty of smoke, of course it will, I'm breaking it in with 20% Byrons, with the higher oil content, Engine runs around 200-230 range.

Awesome... 230 is right were you want to run these engines, on really hot days I have got up around 240-245. As for the K9, I don't have one but I have heard the LSN generally has to be run fairly lean on those. Try the settings others have suggested. As long as you lower the idle as your leaning the lsn you should be able to tell when it's just right, as it should accelerate nice and crisp without loading up. You may also want to run a bit more fuel before you start trying fir a race tune.

Chris Peralta 02-22-2010 09:30 PM


Originally Posted by koreanassasom (Post 7041812)
took my O'donnell Zo1-t and RB B9 2045 pipe combo to Motorama this weekend and man was I happy! I started the day with the carb HS needle at a about 1.5mm above flush and the low speed in a bit from flush maybe 1.5mm or so. it was low lean idling on the low end and i had no top end when my practice started so i turned the bottom out to flush and the top in a few hours and it ripped low-top end was great. i had to lean the bottom 3 more hours so it is barely in from flush. i am very happy with this engine i ran a 7 minute qualifer and had 40 % of my fuel tank still full, 11 minutes maybe;) i ran the OD 97t plug, great plug!


In truggy you should be able to get a good 11 minutes with that engine, doing timed runs several times I have gone a little over 13 minutes on some tracks.

crockpot7 02-22-2010 09:51 PM

I just got a RB s7. I havent broken it in yet, should i follow the "break in bible" verbatim? looks like it only says to do about 14 tanks before tuning for a race?

Also does anyone have a used 2045 pipe and header?

meno222 02-22-2010 10:28 PM

do you guys now if they sell a turbo button for the rb s3

Chris Peralta 02-23-2010 07:18 AM


Originally Posted by crockpot7 (Post 7043466)
I just got a RB s7. I havent broken it in yet, should i follow the "break in bible" verbatim? looks like it only says to do about 14 tanks before tuning for a race?

Also does anyone have a used 2045 pipe and header?

I have not read the break in bible method but as long as it is a heat cycle method of break in that has you heating the engine up prior to starting the engine and getting the temps up around 200. RB's generally take more than 14 tanks before they are fully broken in. You should be able to put it on the track after 14 tanks you just shouldn't fully lean it out yet, after about a gallon it will fully free up and you can lean it out more at a full race tune. The key is to be patient in that first gallon and don't expect too much out of the motor, when people try to lean the engine out too soon is when premature wear happens.

I am pretty sure I do have a 2045 pipe that would work for ya, it is slightly dented but it still works fine. PM me if you are interested.

Chris Peralta 02-23-2010 07:22 AM


Originally Posted by meno222 (Post 7043598)
do you guys now if they sell a turbo button for the rb s3


They sure do, the part number is 01080, and it looks like A-Main has them.

meno222 02-23-2010 08:18 AM


Originally Posted by Chris Peralta (Post 7044728)
They sure do, the part number is 01080, and it looks like A-Main has them.

thanks

Speedyrob 02-24-2010 12:07 PM

Shark 9
 
Got the shark yesterday and ill i can say is WOW:eek: motor and everything look GREAT just like always. I seen the manual say to add a .1 shim for anything over 25% nitro and im going to add one to be safe. Do you guys knoe any thing about the RB engine protecter #02010-001 looks very nice and i think it may make our engines last even longer. I was wanting to know if it would work with a Losi clucth if so im trying one out?? Do you guys think that less nitro = more runtime????

norbit2 02-24-2010 01:36 PM

What is the difference (besides what is on RB's website) between the B.9 H.9 J.9 S.9 and WS.9 I have been out of the hobby for a while and I am a big RB fan. I have always ran a WS7 so I guess all these knew motors in comparison to that. Also is the WS7 3 a big difference. Whats the most and least powerful or what are the different power bands. Thanks

clio 02-24-2010 02:20 PM

New vs older naming.: B9=C6 WS9=WS7 S9=S7 H9=S5 J9=S3 same engines other name for as far as i know.

jmoneym 02-26-2010 02:48 PM

anybody know the best pipe for a RB S9 and the rear bearing size?

aznitronut 02-26-2010 08:14 PM


Originally Posted by jmoneym (Post 7061852)
anybody know the best pipe for a RB S9 and the rear bearing size?

Use the RB 2045 pipe with the 192 RB header, the crank bearing is the same as the WS 7, 13 x 25, there the same as S7 also.

aznitronut 02-26-2010 08:16 PM

Here is the Rb site link for you. http://www.rbproducts.com/mainEn.php...oduit=01009-S9


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