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Old 10-13-2007, 09:23 AM   #1
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i'm new to onroad and i race a ft tc4 on asphalt. i have two questions:

1) i know i can use a diff, oneway, or spool. which one and why?
2) how flexible should the chassis be?
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Old 10-13-2007, 10:07 AM   #2
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to my knowledge
oneway: fast but a little tricky to drive. thats wot i race with
ball: user friendly but slower than a oneway.
spool: like a ball but better for braking and aggrresive driving style but s;low like a ball.

a ball diff will be easyer on frontend impacts so if you are a rookie i would start with a ball in the front.

chassis flex, is it carbon fibre or plastic?
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Old 10-13-2007, 11:03 AM   #3
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It also matters what class your running. Mod, 19T or stock. If youre not that experienced i then a one-way wouldnt be my frist option. A spool is usually the best. You have the braking that you wouldnt have with a one-way. If your running stock, you probably can get away with a one-way, only because you dont do that much braking.

For me, i dont like chassis flex. Sure its good to get more traction (isnt that what your car is for? to make changes to the setup?), but that means its easier for your chassis to get tweaked. I set my car up by suspension not by the flexibility of the chassis. Its more of a personal preference.
Hope this helps you. Also what car are you running?

Chris
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Old 10-13-2007, 12:35 PM   #4
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i run a ft tc4 with foams in the 10.5 class. i'm asking these questions because the temp. dropped 20 degrees last night and my car wasn't getting traction off power through the corners. i know i could get softer foams, but i would rather understand how to tune the chassis, diffs, and suspension. i tried putting a oneway in the front, but it was like driving on ice. keep the replies coming!
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Old 10-14-2007, 07:43 AM   #5
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more flex = more traction you can get..
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Old 10-14-2007, 09:09 AM   #6
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matt loved the itf chassis and top deck on his fttc4 in your club.. not sure if allen also ran the itf chassis or not, but generally the lower the traction the more flex you may want.. (easier to drive) also the lower the traction the more likely you will want to run a spool (make an o-ring spool like matt and donnie do) rather than that brittle associated one that breaks. oneways are fast, but usually prefered on high traction surfaces like carpet or rare asphalt conditions (super smooth, grooved up, vht, with open flowing layouts)
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Old 10-14-2007, 05:15 PM   #7
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Quote:
Originally Posted by tallyrc View Post
also the lower the traction the more likely you will want to run a spool (make an o-ring spool like matt and donnie do) rather than that brittle associated one that breaks.
how do i make a spool with an o-ring?
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Old 10-14-2007, 05:27 PM   #8
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Put o rings in between the ring gear and diff rings and take the balls out and tighten the piss out of it.
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Old 10-14-2007, 07:21 PM   #9
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i take the rings out too, but depends on the size of o-rings you use.. if your in tallahassee ask matt k. or donnie..
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Old 10-14-2007, 07:47 PM   #10
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I have run my FT TC4 extensively on foams on asphalt, no traction additive on the foams or the track.
My car loved the ITF chassis (top and bottom deck), and it seems to like high roll centres with soft springs and soft oil, this is running 12turn mod, but 19turn should be very similar.
I run a oneway, but a diff works fine, it is just a bit slower, I tried a spool but didn't like how it felt.

I can pm you a setup if you like.
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