godofcable

iTrader: (37)

So I just ordered a 17.5 turn Ballistic setup for my SC10. It has a stock tranny (other than a ball diff), and i'm currently running an 87 spur/16 pinion.

what gearing does the Ballistic love? Need decent top end, but also need some low end grunt for a small track.

GizmoJunkie

iTrader: (5)

Small indoor, running no boost, i was at 75/23, 75/24.

On a mild boost Ive gone to 81/24, 78/23.

For that track which is small, tight, and high bite i started at 75/25 but was getting pretty hot.

All on stock endbell timing.

tcrain

iTrader: (195)

Yep..I run a small, tight, high bite track as well. I run 75/26 with a no esc timing/boost rule. Good top end wih enough bottom end to make our big double.

godofcable

iTrader: (37)

Why does 75/24 or even 23 sound really tall to me. Does that give you enough grunt out of the corners?

I have a traxxas titan 12T (brushed, duh) in it now. Tried running 23/87 and it went into thermal. Is the brushless that much more efficient, therefore less heat?

Rufus2010

iTrader: (3)

Stock end bell timing on a Ballistic 17.5 is +30°. Also, if you reduce the end bell timing, you are not supposed to go below +5° for some reason.

godofcable

iTrader: (37)

Where I run requires no boost or timing adjustments so keep that in mind.

slackomatic

Yes they are and a 17.5 brushless has a bunch of torque. I thought the same thing when I was setting up my 17.5 ballistic in the slash but it can handle the tall gearing. I am currently running 24/83 on my 17.5 and throwing 40* of boost on top of that and still just barely touching 160 in a 10min main. Without boost I was running 27/83 in the slash and 20-25* end bell timing.

There are guys at my track running 26/75 in there sc10. But with it that high they have said they cant run them even 1min past 10min or they overheat. They really push the limits with them.

GizmoJunkie

iTrader: (5)

Yeah I have tried 75/25 75/26 (nonboosted). It just gets too hot too quick on a small track where you need all the bottom end you can get. Its almost like standing starts at every corner. The high bite adds a lot of heat.

That ratio would work better on a flowing track where you are in the mid-top rpms and dont need the bottom torque as much.

On a 1/8 track (huge!) i have run 75/28 with boost and turbo and didnt come off the track as hot as i was indoor. That "grunt" makes a lot of heat if you dont watch it. Torque + low gear + traction = Nasty holeshot!

If you have practice time at your track this is where you need to be. Discover the different ways the truck feels. Make sure you temp often. Take a mental note of your lap times.

slackomatic

Never thought about it like that. That makes a lot of since considering my track only has 1 hairpin turn all the rest are sweeping turns.

slackomatic

Godofcable are you setting the SC10 up for the same indoor carpet track you ran the slash on?

racer1812

iTrader: (31)

another vote for 25-26/75 no boost. I've run as high as a 27t but that's on a big track.

godofcable

iTrader: (37)

Yes, same track. Too many losi XXX-SCT's. The Slash is quick straight line but it just doesn't turn. I can pull quick laps with the SC10 but with the Titan in it I eat up a 5000mah Lipo in about 8 minutes.

slackomatic

I would go with what gizmo had said. Starting around 23-24/75 and just run it and check temps. If I remember correctly there really isnt a long straight on that track so having top end wouldnt really be able to be used. Heck I might even go as low as 22 on that track.

godofcable

iTrader: (37)

indoor, small carpet track, tons of bite. I'm thinking about starting at 19/78, and check temps. I'll throw a couple of pinion choices in the box, maybe one or two teeth in either direction, and try them out. checking temps and lap times. lap times i'll be able to feel i think.

i dont want to jump teeth too big, too fast and wind up going too hot

JEFFs SC10

iTrader: (15)

I ran a 74/28 with boost, she ran awesome