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OS SPEED B2102

Old 05-15-2017, 08:49 PM
  #166  
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I like the dubro nitro line. Sticks well and holds up nicely. Also comes in many colors, I have tried many colors and the light blue is the best IMO.

Also I checked my carb and its almost exactly what Drake posted, within 1 hour or so. I'm also in CA, but when we went to TX to the lone star challenge at Thornhill the needles only moved 1 hr. So I think the range Drake suggests is good just about anywhere. If you are having issues my guess would be the idle gap.
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Old 05-15-2017, 09:15 PM
  #167  
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Originally Posted by Frank L
I like the dubro nitro line. Sticks well and holds up nicely. Also comes in many colors, I have tried many colors and the light blue is the best IMO.

Also I checked my carb and its almost exactly what Drake posted, within 1 hour or so. I'm also in CA, but when we went to TX to the lone star challenge at Thornhill the needles only moved 1 hr. So I think the range Drake suggests is good just about anywhere. If you are having issues my guess would be the idle gap.
Well those gaps better be dead on in two weeks....LOL Good luck bro and I'll see you out there.
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Old 05-16-2017, 06:33 AM
  #168  
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Originally Posted by STLNLST
Well those gaps better be dead on in two weeks....LOL Good luck bro and I'll see you out there.
Great on the mic but not good on the needles??
If you are having a running issue lmk.
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Old 05-16-2017, 09:35 AM
  #169  
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Also I checked my carb and its almost exactly what Drake posted, within 1 hour or so. I'm also in CA, but when we went to TX to the lone star challenge at Thornhill the needles only moved 1 hr. So I think the range Drake suggests is good just about anywhere. If you are having issues my guess would be the idle gap.[/QUOTE]

Frank, what temps are you getting with these settings?
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Old 05-16-2017, 02:41 PM
  #170  
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230-270. It varies a lot.
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Old 05-16-2017, 09:13 PM
  #171  
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Originally Posted by Frank L
Great on the mic but not good on the needles??
If you are having a running issue lmk.
Mason is my tuner and he's kept me running which is all I care about. I'll be learning more engine tuning after this race. Gotta be able to survive without him ;-)
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Old 05-23-2017, 08:05 AM
  #172  
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Looks like the LRP branded B2102 is 50 bucks less, if anyone is interested.

https://www.amainhobbies.com/lrp-zz....p32123/p637439
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Old 05-24-2017, 09:14 AM
  #173  
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So what venturi do people mostly run in this motor..6.5 or 6
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Old 05-24-2017, 03:47 PM
  #174  
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I usually run a 6.5mm or 7mm venturi in the O.S. Speed B2102 engine.
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Old 05-24-2017, 03:52 PM
  #175  
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https://www.youtube.com/watch?v=mS1Poa3zgig
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Old 05-24-2017, 03:53 PM
  #176  
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https://www.youtube.com/watch?v=oX51vQoOc0c
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Old 06-13-2017, 04:11 PM
  #177  
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Does anyone have a good needle setting? I don't onw a caliper sorry. Thanks.
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Old 06-14-2017, 09:22 AM
  #178  
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Originally Posted by gonzalo
Does anyone have a good needle setting? I don't onw a caliper sorry. Thanks.
Some people set needle settings by turns out from bottom or by turns in from flush... both ok, but not quite as accurate.

Home Depot or your favorite tool shop has digital calipers for $15-$30.
I find it to be a priceless tool not only for needle settings, but for droop measurement, linkages, shock lengths, measuring out screws and shims... don't know if I could wrench on a car without it.
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Old 06-26-2017, 02:52 AM
  #179  
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Ran my 2102 for the first race this weekend at the brca national race series.

Running in was very easy, 4 tanks on the box heat cycling & 6 more on the ground progressively getting up to full throttle.

Set up

OS 2090 pipe
JVD ally 4 shoe clutch
7mm Venturi
Carb setting top end as per Adam drake instruction
Bottom end at least half a turn richer than Adam drake as it wouldn't settle down to idle properly & was lean bogging, after I richened it the engine ran perfect.


Ambient temperature was around 80 degrees Fahrenheit. Qualifying runs were 1.30 warm up & 5 mins & 1 min at the end so generally 7.30-8 mins on the track.

Engine was coming off around 253f with 1/4 to 1/3rd fuel left, really happy with this as the engine has only done 1/2 gallon.

When the engine came back from the run it settled down to idle really quickly & sat at idle comfortably.

Final was 20 mins long & I did just 1 fuel pit stop, during fuelling all good and again settled down during fuelling. Good trail of smoke all the way through power.

The engine had so much useable power bottom to top, top end really sings & is crisp on the bottom end.

I came off the final with roughly 1/8th of a tank of fuel left!
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Old 07-09-2017, 07:51 PM
  #180  
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Are most running P3 or P4 plugs?
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