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R/C Tech Forums Thread Wiki: New Schumacher KF2
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Welcome to the KF2 Wiki!

Please feel free to add any Tips, Tricks, or anything that would be beneficial to the KF2 Family

Introduction and Pictures Introduction and Pictures

ElectronicsSetupElectronicsSetups

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EmulsionShocksEmulsion Shocks

Tony Newland Gear Diff BuildTony Newland Gear Diff Build

Suggested Gearing

6.5
7.5
8.5
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17.5 I ran 69/31 at SRS Scottsdale Arizona and 72/30 at MHOR Aurora Co and Full Throttle ALB, NM RCM lockout worked excellent!


MIP pucks excellent upgrade! The new RCM lockout is an excellent piece as well! These options will greatly reduce weight throughout the drive line!

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Old 11-21-2016, 12:14 PM   #1081
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Agreed
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Old 11-22-2016, 03:46 AM   #1082
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Well I do have the sway bar just cause I needed a bump up for shipping from Amain. lol

I'll have to think if when I changed to the alum camber block did I start to have my problems. I do have 4mm of spacers under that camber block to raise it back to where the stock carbon block would have had the ball studs. But I'll switch it back. Maybe it could now be the spacing between ball studs left to right. They do get wider between carbon and alum.

This Friday will be the next test.
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Old 11-22-2016, 06:43 AM   #1083
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Well I do have the sway bar just cause I needed a bump up for shipping from Amain. lol

I'll have to think if when I changed to the alum camber block did I start to have my problems. I do have 4mm of spacers under that camber block to raise it back to where the stock carbon block would have had the ball studs. But I'll switch it back. Maybe it could now be the spacing between ball studs left to right. They do get wider between carbon and alum.

This Friday will be the next test.
yep, the length and height are a big deal. Also how much anti squat do you run? I found my car to work best with 1 degree.
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Old 11-22-2016, 06:49 AM   #1084
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I finally got to mount up the Slipper eliminator from RC Madness and it saves quite a bit over stock. Look for yourself.

By switching only that and trimming / cleaning up my wiring, I went from 1640g to 1580g. My goal is to get to 1540. I still have to add a fan though, so realistically I need to drop about 80-100g to net out around 1540.

Keep in mind that I still am running the Alum chassis too. Switching to the Carbon should save probably 40-50g alone
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New Schumacher KF2-15134789_1335720213117438_186462631083505725_n.jpg   New Schumacher KF2-15109489_1335720269784099_259273867885802646_n.jpg  
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Old 11-22-2016, 07:47 AM   #1085
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I think right now I am using the #2, so I a assuming that means 2deg? I'll change out the camber link first, test, then swap to the #1 bit.

Btw, here is the difference between the aluminum chassis and the +7mm carbon chassis

Aluminum - 149g vs Carbon - 88g = 61g savings.

I am sure it is a slight more with the standard carbon chassis.

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Old 11-22-2016, 10:40 AM   #1086
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it's not 'degree's. It goes by measurement from hole to hole. 2 Dink is the middle size and is 38.0mm hole to hole. This is the standard starting point and most widely used. The only other setting I've seen used was 33.5 (1 Dink)

The Alum doesn't have that option (42.5 and 33.5) which is why it's not widely used.
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Old 11-22-2016, 10:47 AM   #1087
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I meant degrees in the ainti-squat inserts, not the camber links.
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Old 11-22-2016, 12:04 PM   #1088
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I meant degrees in the ainti-squat inserts, not the camber links.
DOH!!!!!!

I feel dumb

yes, the number represents how many degrees of anti-squat you are running.

My suggestion is use the 1 insert, go run 5 clean laps and get your lap times. Then run the 3 insert and repeat. This will allow you to see the effect that Anti Squat has on your car and on the clock. I say go from 1 to 3 so it's a bigger jump and should make the effect that it has easier to see.

You can repeat the process with 1 and 2 to see which is better for you.
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Old 11-22-2016, 03:44 PM   #1089
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Ok, I was at #2 for the anti squat inserts. Installed #1.
Carbon control link installed with 3mm spacers on ball studs per manual.

Come on Friday, get here!
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Old 11-22-2016, 04:00 PM   #1090
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Ok, I was at #2 for the anti squat inserts. Installed #1.
Carbon control link installed with 3mm spacers on ball studs per manual.

Come on Friday, get here!
First change I would try at the track is go to 1mm on the ball studs and no shims under the actual carbon link.
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Old 11-23-2016, 12:19 AM   #1091
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I have changed tires, camber, weight, wheelbase, shock oil, spring rate, roll center. Right now my ratio is 59/41 and total weight of 1530g. I even swapped out front tires in order to reduce front traction.
If you're struggling for traction you need to look at your weight distribution, 59 rear is quite low. I'm surprised your only at 59 looking at your layout with the rear bones reversed and the ESC at the back.

Next things to do are to start adding weight around the very back of the chassis or even the rear brace. Take anything you can out of the front and if you haven't already flip the front bones.

I find it easier to get the weight back with less overall weight in the low grip layout.

Also in the photo looks like your rear shocks are on the outer hole on the bone, that makes the rear pretty stiff and could cause it to break loose in turns.
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Old 11-23-2016, 06:20 AM   #1092
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First change I would try at the track is go to 1mm on the ball studs and no shims under the actual carbon link.
Raise the roll center, ok I'll try that first.
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Old 11-23-2016, 06:43 AM   #1093
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If you're struggling for traction you need to look at your weight distribution, 59 rear is quite low. I'm surprised your only at 59 looking at your layout with the rear bones reversed and the ESC at the back.

Next things to do are to start adding weight around the very back of the chassis or even the rear brace. Take anything you can out of the front and if you haven't already flip the front bones.

I find it easier to get the weight back with less overall weight in the low grip layout.

Also in the photo looks like your rear shocks are on the outer hole on the bone, that makes the rear pretty stiff and could cause it to break loose in turns.
I took the wheels off to remove them from the weight in case they had some funky effect on the balance. I am still at 59.2/40.8 split. And have 20g of weight behind the spur. It's just sitting there as I was just trying to find balance. One thing I didn't do was flip my rear arms again. I had them back trying to find traction. I'll put it on the scales tonight after that flip. I bet I can get to 61-2 in the rear and 38 in the front then.

I can possibly move the receiver back along but not by much. Outside of that, I don't know what else there would be to move. I do have a full servo in there and not a shorty.

Do you mean flip the front arms like you can with the rear? Does that push the front wheels further forward? It looks like they come out pretty parallel, not like the rear that are offset.

Btw, the plastic plates that are mounted to the axles are each tared on their prospective scales before being added to the car, so they have no bearing on the weight of the car.
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Old 11-23-2016, 10:25 AM   #1094
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Okay that makes sense, I usually measure with the wheels on, pros and cons of each way. For sure your reading would be further back with the wheels on, the rears being heavier.

Flipping the front bones makes about 2mm difference to wheel base, flipping them will help with rear traction. If you want traction, you need the rear bones flipped too, this is a huge change, about 8mm wheel base. I donít think it drives as smooth with them flipped, but itís a big help with traction.
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Old 11-23-2016, 04:00 PM   #1095
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Flipping the arms around on the front so that the screw that holds the shock on is facing front is 'arms reversed' and is very common because it calms steering down.

I run the rear arms standard, front arms flipped.
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