Losi XXX-S

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Old 10-21-2004, 11:08 AM
  #12406  
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Chad if you run your front tires smaller than the rears you are adding more overdrive...the front tires will spin more rpm than the rear. Can anyone give me some feedback on running the 2R blocks front and rear.....what does this do to the car?
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Old 10-21-2004, 11:20 AM
  #12407  
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Running a smaller tire does under drive that end of the car. Another way to think about it is to calculate the roll out, smaller tire = less rollout.
Running the 2R block up front takes out the inner hinge pin angle, this will make the frontend dive less. I do not run this on carpet.

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Old 10-21-2004, 11:31 AM
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then smaller diff gear means less roll out too...think about it. Anyone else see what i mean or am i just not getting it.
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Old 10-21-2004, 12:12 PM
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Here is the math:

Roll out=(tire size*Pi*pinion)/spur/internal gear ratio

58mm Tire with 42 pulley
(58*3.14*28)/128/1.83=21.78

58mm Tire with 41 Pulley
(58*3.14*28)/128/1.73=22.39

57.8mm Tire with 41 pulley
(57.8*3.14*28)/128/1.73=22.31

BTW the center pulley has 23 teeth
42/23=1.83
41/23=1.78

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Old 10-21-2004, 01:00 PM
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can't argue with math!! i stand corrected. now the setup that all the losi guys around here are running is basically 2R front and rear version of bobby flacks setup. heres a dumb question...whats the 2 stand for....like 2R 4F 0F etc etc
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Old 10-21-2004, 01:07 PM
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The 0,2,4 is the amount of kickup/antisquat the block has. The F or R is for front or rear. Now you have to remember that the blocks were made for high or low roll center and the Losi front low blocks are really mid roll center. So if you use the front Losi low block with a 0F or 0R you get -2deg kickup a 2F or 2R will give you 0deg kickup.

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Old 10-21-2004, 01:11 PM
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ok cool so i am using the losi low roll centers with the 2R front and rear.
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Old 10-21-2004, 01:14 PM
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you have to forgive me Ive been running Schumacher for the past 3 years and that car is in a world of its own
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Old 10-27-2004, 03:14 PM
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Default Diff and thrust bearing greese

Anyone know what kind of clear greese comes in the little tube for the diffs, and the other tube for the thrust bearing.

also what the red greese MIP uses for its CVDs

I would like to buy these in a little larger quantity.
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Old 10-28-2004, 08:14 PM
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Sorry if this has been asked before, but will 30mm foams fit on the back without mods?
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Old 10-29-2004, 07:33 PM
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Originally posted by thedominator
Sorry if this has been asked before, but will 30mm foams fit on the back without mods?
I think they will but you should use AE hex on the rear and on the front.
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Old 11-01-2004, 02:53 AM
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Default RPM

i know this question has been asked before but i cannot find it.

Could somebody please tell me what the part nuber is for the rpm ballcups for the xxxs.



cheers
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Old 11-01-2004, 06:19 AM
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RPM ball cups: 73372 Black
" "81 White
" "75 Blue
" "77 Yellow
" " 78 Purple
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Old 11-01-2004, 11:03 AM
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Originally posted by akrcracer
RPM ball cups: 73372 Black
" "81 White
" "75 Blue
" "77 Yellow
" " 78 Purple
thanks
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Old 11-01-2004, 08:03 PM
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Default Congo springs for carpet

At the close of last winter's carpet season, I was using the Trinity Congo Yellow springs (44 lbs rate) and the Trinity Congo Purple springs (33 lbs rate) on the front and rear of my XXX-S carpet car with very good results. I race at Stockton carpet which is smooth with high grip.

Is anyone else listening using these high spring rate Trinity Congos for their carpet setups?

Thanks.
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