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Old 05-24-2010, 07:33 PM   #181
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how do the springs rate's go in order,red blue,silver,gold
Hard-soft
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14-12-10-8 lb
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Old 05-24-2010, 07:41 PM   #182
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Any updates on the new front end?
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Old 05-28-2010, 03:12 PM   #183
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Alright, I made some runs with my car yesterday, and I have a strange issue that I'm not 100% on how to correct.

I found a good deal on scales, so I verified [didn't change anything] that my car is balanced within 0.07%, L-R close enough to 50% cross weight, and I'm showing 41% Front weight with a total weight of 697g. Car also shows no tweak, all the bearings are running free, everything should be right in the world, eh?

Unfortunately, I don't have a real good way to measure and set front toe at the moment [Hudy system on the way], but I'm running the toe as close to zero, or slight toe-out.

Anyway, at slow-medium speed and takeoff, the car jumps left on acceleration. Through right hand corners, I'm getting some double-steer and a slight push on entry, but can drive through smoother with more throttle. In left hand corners, I have to be very gentle on the throttle, or the car spins out, and it enters the corner very "crisp". At speed the car drives straight, doesn't wander, and isn't nervous.

I was primarily practicing my TC outdoors, just running my Copperhead between TC packs and tweaking, so I didn't spend a lot of time beyond the obvious of making sure all the pivots were tight, no slop in steering linkage or shock, etc.

The carpet hasn't had any racing on it since spring started, but traction seemed to be pretty good, running Purple/Pink tire compound, and tires are wearing evenly.

Front kingpins seem to be moving smooth.

Any ideas? Rest of the setup is per kit instructions. Would dry damper tubes explain this? I didn't check them at the track yesterday.
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Old 05-28-2010, 04:15 PM   #184
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Kinda sounds like it might be a diff or rear axle issue. Are the hubs tight up against the bearing or did you use the paper trick to have a little play in the axle?
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Old 05-28-2010, 04:24 PM   #185
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When I had left spinouts there was a motor wire resting on the tube.
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Old 05-28-2010, 04:33 PM   #186
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Kinda sounds like it might be a diff or rear axle issue. Are the hubs tight up against the bearing or did you use the paper trick to have a little play in the axle?
Guess I don't know the paper trick. There's no play in the axle, but I didn't squeeze the left hub up tight when I snugged it to the axle either.
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When I had left spinouts there was a motor wire resting on the tube.
Hmm... there is a motor wire resting against the right damper tube...

Thanks guys, racing TC outdoors Saturday, but I should have a chance to run some laps on the rug between rounds.
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Old 05-28-2010, 05:15 PM   #187
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Yeah you definitely need a very slight amount of play in the rear axle or it will put enough drag on the axle to cause the car to pull to one side. Just stick a piece of paper between the hub and the shims/spacer or between the bearing and the shims/spacer when you tighten down the left side hub then remove the paper once the hub is on tight.
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Old 05-28-2010, 05:44 PM   #188
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Originally Posted by InspGadgt View Post
Yeah you definitely need a very slight amount of play in the rear axle or it will put enough drag on the axle to cause the car to pull to one side. Just stick a piece of paper between the hub and the shims/spacer or between the bearing and the shims/spacer when you tighten down the left side hub then remove the paper once the hub is on tight.
I knew what you meant as soon as you mentioned paper trick, I'd just been away from pan cars so long I didn't know/forgot about it.

Used a piece of paper to set the gap, rear axle does seem to be a tiny bit freer now.

But, I looked close at my motor wires, and all three had a crease in them where they were squeezed between the battery and the right side damper tube, so I shortened the motor wires up so they can't get pinched at all.

Both tubes were still lubed up and felt even, so it had to be a combination of over-snug axle and motor wire/damper tube interference.

I'll slap it on the rug tomorrow and see how it acts.

Thanks guys.
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Old 05-28-2010, 07:27 PM   #189
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Another thing to do with the wires is to run them in such away that they go under where the shock and damper tube connect to the upper plate. There is more room there so the wires will not get caught up in the rest of the suspension and cause tweak. When I eventually get my Copperhead 12 I plan to run the motor wires around the battery along one of the flex plates. If done right the wires won't be in the way when taking the battery out of the car and it won't cause tweak.
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Old 05-28-2010, 07:57 PM   #190
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Right now the wires are routed under the upper pod plate, over the battery, along the shock and to my RS. Running TQ 16ga and there's still some slack in the wires, so I really doubt they'll cause tweak, but they were limiting pod articulation being pinched under the damper tube.

Again, I'll find out whether that cured my issue or not tomorrow, I'll find time to run it at some point during the race day [we don't race 12th outdoors, some pretty wicked bumps in a high speed section]
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Old 05-28-2010, 08:03 PM   #191
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Right now the wires are routed under the upper pod plate, over the battery, along the shock and to my RS. Running TQ 16ga and there's still some slack in the wires, so I really doubt they'll cause tweak, but they were limiting pod articulation being pinched under the damper tube.

Again, I'll find out whether that cured my issue or not tomorrow, I'll find time to run it at some point during the race day [we don't race 12th outdoors, some pretty wicked bumps in a high speed section]
i have mine under the tubes and 16g wire with no issues,here it is with 14
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Old 05-28-2010, 09:02 PM   #192
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My RS is on the left side of the chassis, and with the motor wires coming over as far as yours to the right side of the chassis, they were crossing over each other and pinching under the damper tube.
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Old 05-29-2010, 05:00 AM   #193
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Also, make sure that your rear axle is centered. There is a hole in the lower c/f pod plate. Measure from that hole(it is center of the car) to the outside of each wheel. If it is off you may have the clamping hub on backwards. Let me know if this helps.
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Old 05-29-2010, 03:58 PM   #194
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I'll double check, thanks.
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Old 06-15-2010, 07:51 AM   #195
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i finally tried the conversion which seems to fit the version 1 SMC battery exactly. but the thunderpower 1s battery has a smaller footprint and rounded edges.

has anyone got a clever trick to keep the battery from slopping around? i was going to use some extra thin 2sided carpet tape. i don't have the nerves to cut a tape slot inboard of the the cutout.

also, is there a std setup for carpet? thanks in advance.
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