Ok...... but I still don't know where you can get any of those servos from. On the speedmerchent, what are the different ways the instructions say you can mount it? Does it tell you how to drill holes or tell you how to use shoe goo or what? How come the geometry would be messed up if you didn't use a Kimbrough small servo saver? Do either of the cars come with a servo saver? Probably not because the size of the external gear on servos usually very a bit :rolleyes: . One reason I don't want to use shoe goo is because if I strip out a servo gear, than I probably wouldn't have my car working again for the next race because shoe goo doesn't dry super fast. Thanks for all the help! It's all very helpful. :D

your LHS might have them, or most larger online shops have them (tower hobbies almost always has them in stock). As far as the KO propo, from what i've heard from Ko team drivers is that its way to fast for even them (and thats in mod), lol.

in the speedmerchant manual it tells you to line up the front of the servo case with the arm or something like that (sorry i cant tell you specifcally since i dont have the manual and havent done it in a long time). and with the servo saver its phyically impossible pretty much (except if maybe you took a dremel or hammer to the servo) to break servo gears, and messing up the servo saver almost ALWAYS takes place when you remove it or put it on.

it would change the steering geometry because of the height of the ball stud, and thus mess up your ackerman (or at least i am pretty sure thats what it does, also it could rub the chassis since the servo sits on it, and the servo gear sits very close to the ground (since the servo is smaller to begin with).

it may seem like alot of annoying crap right now, however running 12th scale is alot simpler than sedan, just hold in there!:)

So in the manual it does tell you how to properly drill holes? Or just how to properly mount the servo with shoe goo or servo tape? Yer right, this DOES seem like a lot of annoying crap right now. I've changed my mind about cars, or components so many times. Ugh. So I should get a small Kimbrough servo saver if I get either car, right? If my servo turns out to be too fast I can just dial out some speed with my transmitter :) , so no worries here. So I think I'm gonna get the Airtronics 94143 for the servo and a couple small Kimbrough servo savers. Who else has run both the Carpet Knife and the Rev 3, do you guys not mind having to use servo tape of shoe goo for mounting your servo in the Rev 3? Just trying to get a couple more opinions before I make my big ol decision on which car to get. Thanks for helping me through all this stuff! :)

Is this the servo you guys were talking about, it's a 94145Z. It's not compatible with standard Airtronics recievers I think from what it said, but I have Futaba recievers and things, and it said it was compatible with Futaba :) . Unfortunaitly it won't be in stock until late June :cry:, any other ideas of palces besides tower? My track might have it, but it will cost more and I will have to pay tax which I don't really want to do.

http://www2.towerhobbies.com/cgi-bin...?&I=LX0931&P=7

Here's the smallest servo safer from Kimbrough that would work on Airtronics:

http://www2.towerhobbies.com/cgi-bin...?&I=LXND49&P=7

It doesn't say "mini" but it says mid-sized, would it be small enough?

dx6-
The Airtronics servo that most people use for 12th scale is the 94145. It will work with Futaba. Make sure you check the plug wires so that the plus, minus and signal are in the right order. Plus=red, minus=black, signal=blue. It's a metal gear servo, although not all the gears are metal (?).

The mid size servo saver is too big (like huge)- you need the small one.

Drilling holes for the servo mounts is not that difficult. The way I do it is to attach the mounts to the servo then position the servo on the chassis as the instructions state. Then mark around the mounts where they touch the chassis. Then take the servo off and mark the center of the holes you need to drill based on the servo mount marks. Then just drill the holes. Servos in mounts are sturdier than tape or goo, and it's easier to take the servo on and off.

I have and race both a Rev3 and a Carpet Knife. There's not that much difference between them. They are both great cars, each with thier good and bad points. You won't go wrong with either one.
O'D

94145
 

oh yeah-Sheldon's Hobbies carries the 94145 for about $60.00.

Rev 3. manual
 

Stormperson, I bought a previously owned (sounds better than used) Rev 3. I got a set up sheet with it, but no manual. Is their such a thing as an actual Rev.3 manual. I looked on the speed merchant Web site, but didn't see anything about a manual. Unfortunately I didn't get it before the end of the carpet season and I am going to have to wait until Oct. to try it out.

Thanks for any help,
Terry

Our carpet season goes year round :D . If it's not raining on saturdays during the "good weather" season we race outdoors. So I'll be able to use my new 1/12 all summer, once I get it ;) . Does Sheldon also carry the the Kimbrough mini servo saver for the 94145? Does the Rev 3 come with servo mounts? Or do you have to purchase them sepretly? If I got the CK with the "old skool" front end seperatly, would I also get instructions on how to install the old skool front end with the kit? Or do I have to find some instructions for the Rev 3? Or I could just figure it out my self on how to put it together. Since the CK mounts the servo pointing up slightly, do you need the mini servo saver, or could I use the mid-sized one there? For drilling holes to mount the servo on the Rev 3, I would need a counter sinking drill bit right.......? Where can I get a counter sinking bit, what size would I need?

new servo from futaba
 

Salutations Earthlings!
its a digital mini servo from futaba : S9650
case size: 35.5 X 15 X 28.6mm, 26gms
torque: 3.6kg.cm @ 4.8V or 4.5kg.cm @ 6.0V
speed: 0.14sec/60 @ 4.8V or 0.11sec/60 @ 6.0V
do we need this kind of speed or holding power?
-FP

On the CRC website I found something that said:
The Carpet Knife V3.1- Professional Four Cell 1/12th Scale Multiple On-Road Champion. With Retro-Front End + 3 bolt rear wheels
What do you suppose a retro-front end is? Because the other CK's they advertize just say "with 3 bolt rear wheels" and nothing about the front end. I wasn't able to find out what they ment by retro-front end. They sell the "retro-front end" seperatly for 20 bucks, thats the same price that Hobby ect. sells the "old skool" front end. Could the retro-front end possibly be the same as the old skool front end? I'm really leaning towards the Carpet Knife over the Rev. 3 because of the servo thing. I really like how the Rev. 3 has the adjustable battary mounts, but I feel like I could just screw up my nice new chassis. I know they're both good cars too so I'm sure I'll be happy with the CK. It would make building the car much more fun not having to worry about the servo mounting thing :rolleyes: .

i do like the that too...
 

Salutations Earthling racerdx6,
i do prefer the rev3 myself, especially if it uses the old skool front end.
b'cos ....its simple beyond words!
easy to build, setup n maintain.
and there is very little chance settings being altered in a scrap.
as a matter of fact, when i purchased my carpet knife, i installed the old skool front end right away!
1/12 should be run on smooth prepared tracks , so i feel a strut sus shld never really be neccesary.
-FP

I think I'm going to definetly get the standard Carpet Knife and buy a "old skool" front end for it. Unless the Carpet Knife with the "retro-front end" is the same as the old skool front end. What replacement parts should I also order, I know I should get some parts for the front suspension. What front suspension parts break often? Do any other parts break very often or wear out very often that I should consider buying extras? I'm also going to get a foam bumper to try trimming to fit and also a plastic bumper to see how I like that. What extra parts like springs should I also get, should I buy springs for the center shock and a side spring set? What about a front spring set? Thanks again for all the help! :D

Hi, which set up is better, the "old school fronts" or the ones by AE? Or they are just the same? I got my CK Team Red with AE Fronts. Thanks :)

Rollout
 

Howdy fellow 12th scale racers,

I'm sorry if this question's been asked already... I asked it on the corally thread and other forums, but to no avail.

Can somebody please recommend a rollout for 6 cell mod (12x2), with 3000HV's, on a moderately tight, extremely grippy asphalt track? We're running 12th scalers for kicks when it's rainy outside and we can't run 8th scale onroad, so I'm more focused on lesser motor maintenance with adequate performance, than squeezing these last 50mAh out of my packs to run 8 minutes and one lap, but having to rebuild the motor every couple of runs.

Also, what's the rule of thumb for rollout per wind? Say, you're going from a 12 turn to a 13 turn, shall you lengthen rollout by 1mm? 2mm? Or anything else?

Rollout advice, anybody? :D

Thanks
Paul