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Old 03-23-2012, 12:01 PM   #2131
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Default Kody Knudtson's ROAR Nationals Mckune MD-FGX

First off congratulations to Kody Knutson for finishing 2nd place at Nationals. Also, congrats to Robert Bremer for his 5th place finish and Mark Day for his 10th place finish. All were running Mckune MD-FGX's.

Although it may end up being the most controversial race of the year, the F1 A Main at the 2012 ROAR Nationals has definitely drawn attention to F1 racing. It also showed the the FGX can compete with the F104's on carpet.


As many of you know, Kody ran my MD-FGX at the ROAR Carpet Nationals last weekend. He ran the same car I did all of the development on over the last few months. The setup he ran at Nationals is pretty close to how I had the car setup for the Emerald City Classic the week before. Yesterday, He drove down from Seattle to Timezone and delivered my car. The pictures below were taken last night at the track and are exactly how he ran the car at Nats (except for my receiver). Kody has had many requests for his setup so here it is.


Kody Knudtson's 2012 ROAR Nats MD-FGX Setup:


Chassis: 3Racing FGX with Mckune MD-FGX Carbon Coversion
Body: 3Racing FGX Formula one Body

Rear Suspension:

Shocks: 1 Hole 90 weight Losi
Springs: CRC Black (Cut down tubes to allow long springs)
Swaybar: #5 Stiffest
Upper Arms: Carbon Fiber Mckune Upper arms
Lower Arms: Stock
Ride Height: 4.5mm
Droop: 1mm
Camber: -1 degree both sides
Hexes: 4mm Integy
Rear Tires: Shimizu Soft Ribs on HPI silver wheels, full sauce
Notes: 2mm Spacer under Damper arm and 1.5mm spacer under damper arm ball stud. See pic below.

Front Suspension:

Lower Arm: Stock reinforced with glued on carbon fiber strips
Upper Arms: Traxxas 4724X Rod ends on inside. Du-Bro 2321 Heavy Duty Ball Links on outside. 3Racing titanium 38mm and 35mm turnbuckles.
Steering Blocks: Tamiya F104 50395 Uprights with custom Carbon Fiber extension.
King Pins: Tamiya F104 54160
Springs: CRC .55
Camber: -1 each Side
Caster: 8 degrees
Tires: F104 soft slicks on Ride F104 silver wheels, inside half sauce.
Ride Height: 4.5mm
Steering Linkage: Stock with 1mm spacer to extend it forward
Notes: Space down steering linkage until level at rest to avoid bump steer.

Everything Else:
Battery: Revtech Shorty 65C
Motor: Revtech 21.5 1 line of timing past middle
Gearing: 31 pinion/35 spur
ESC: Black Diamond Version 2 with 50% drag brake
Servo: Savox 1251

Notes:
Battery forward with ESC inline. A very stiff rear end and a ton of front caster (Between 8 and 10 degrees) with the soft slicks is critical for this setup. This results in a car with tons of on power steering. This also eliminates the front chatter on high speed sweepers and off power steering or hard breaking and steering.


Special thanks to Mark Day and Timezone Racing for supporting and pitting Kody at Nationals. All the tires, wheels, steering blocks, and chassis kits are available at www.timezonehobbies.com
Attached Thumbnails
3 racing new F1-kody-md-fgx-body-1.jpg   3 racing new F1-kody-md-fgx-pic-2.jpg   3 racing new F1-kody-md-fgx-pic-1.jpg   3 racing new F1-kody-md-fgx-pic-3.jpg   3 racing new F1-kody-md-fgx-pic-4.jpg  

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Old 03-23-2012, 06:02 PM   #2132
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As a newbie to F1 RC cars, where can I learn about these parameters such as camber, droop, caster, etc. and how it effects my car? I am somewhat familiar with those terms as it relates to real F1, but do they relate directly?
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Old 03-23-2012, 06:15 PM   #2133
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Grats Kody and Troy for a good showing at the ROAR Nats!

Interesting that Kody was using a link type upper suspension arms instead of the machined upper arms.
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Old 03-23-2012, 06:39 PM   #2134
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Originally Posted by huskerwr38 View Post
As a newbie to F1 RC cars, where can I learn about these parameters such as camber, droop, caster, etc. and how it effects my car? I am somewhat familiar with those terms as it relates to real F1, but do they relate directly?
This website was very informative for me. It was a long read but I feel worth it.
http://users.telenet.be/elvo/
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Old 03-23-2012, 06:48 PM   #2135
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We were concerned about the 14 day rule from ROAR regarding the components being available to all. ROAR did not enforce that rulle so we should have come down with the rest of the prototype parts. but the links are the only way you will be able to get the castor we are now running.

at the track last night my car was dialed and turned the fastest FGX lap to date... just a slightly different setup from Troys Car

Front:

Silver spring from option kit
.5 front toe out
standard king pin
3mm shim forward on optional steering system

Rear:

1-1/2 neg Camber
CRC Encore Shocks 2 hole piston 1mm holes 45wt oil
Medium shock spring from F-201 Spring Kit (Close to CRC Purple on shock dyno)
1mm shim rear anti squat
1mm shim under rear link
1 degree rear toe
Diff 750 CST (also in troys car)

21.5 Revtech 2 lines advanced over center 31/35
Revtech 65C Shorty Pack
Tekin RS Pro Speedo

Think there is still some more left to get out of the car will be working on rear shock setup this weekend
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Old 03-23-2012, 07:00 PM   #2136
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Originally Posted by InspGadgt View Post
Grats Kody and Troy for a good showing at the ROAR Nats!

Interesting that Kody was using a link type upper suspension arms instead of the machined upper arms.
I was told by ROAR in an email as well on the Nationals thread that the 14 day rule applied and that no prototype parts were allowed. All parts were supposed to be commercially available. This is why it was such a big push to get the chassis kit out by the end of the month so I would have a few day buffer. When Mark and Kody got down there they found out that anything was acceptable.

As far as the multi-link upper arms, this was something I tried out at the Seattle race the weekend before. All parts are easily available and it allows for huge amounts of caster. The Tamiya king pins are much better and don't break as easily as stock. While using these uppers, you can move the lower arm to adjust wheelbase. Kody was running the 4th mark.

Troy
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Old 03-23-2012, 07:21 PM   #2137
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[As far as the multi-link upper arms, this was something I tried out at the Seattle race the weekend before. All parts are easily available and it allows for huge amounts of caster. The Tamiya king pins are much better and don't break as easily as stock. While using these uppers, you can move the lower arm to adjust wheelbase. Kody was running the 4th mark.]


I know that the multi-link upper arms work great, but personally, I prefer your machined upper arms that you showed on an earlier prototype. They looked more scale to me!
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Old 03-23-2012, 09:53 PM   #2138
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Originally Posted by Team Lotus View Post
[As far as the multi-link upper arms, this was something I tried out at the Seattle race the weekend before. All parts are easily available and it allows for huge amounts of caster. The Tamiya king pins are much better and don't break as easily as stock. While using these uppers, you can move the lower arm to adjust wheelbase. Kody was running the 4th mark.]


I know that the multi-link upper arms work great, but personally, I prefer your machined upper arms that you showed on an earlier prototype. They looked more scale to me!
+1 : Do you have an ETA on their availabilith to the public ?
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Old 03-23-2012, 10:51 PM   #2139
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Old 03-23-2012, 10:52 PM   #2140
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Well my FGX has shipped...can't wait till it gets here
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Old 03-24-2012, 01:41 AM   #2141
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Built my second fgx today!
Also found that X-ray nt1 gear diff gears fit the fgx gear diff, also made it nice and smooth and not tight!
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Old 03-24-2012, 07:23 AM   #2142
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Quote:
Originally Posted by RedBullRacing View Post
+1 : Do you have an ETA on their availabilith to the public ?

I am not speaking for Troy in any way but the issue i am having with the machined delrin upper arms is that because the turnbuckle is so short on the kingpin side it tends to tweak easily. I actually took mine off until i come up with a better solution, which will more than likely be a long 3mm set screw but you will have to remove the e clip to adjust camber. Once again I am not speaking for Troy but this is the reason i am not selling mine.
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Old 03-24-2012, 07:24 AM   #2143
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Originally Posted by shano83 View Post
Built my second fgx today!
Also found that X-ray nt1 gear diff gears fit the fgx gear diff, also made it nice and smooth and not tight!
Good find! got a part number or link for them?
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Old 03-24-2012, 02:18 PM   #2144
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Originally Posted by shano83 View Post
Built my second fgx today!
Also found that X-ray nt1 gear diff gears fit the fgx gear diff, also made it nice and smooth and not tight!
do you have the part numbers for the gears ?
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Old 03-24-2012, 03:41 PM   #2145
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Originally Posted by MantisWorx View Post
Good find! got a part number or link for them?
Oh u guys are lucky
I didn't have part numbers but went looking!
Here ya go
http://www.rc-mushroom.com/product_i...-gears-p-13534

http://www.rc-mushroom.com/product_i...ns-nt1-p-20496

2 choices steel or nylon

Also use these as well as the standard gasket.
http://www.rc-mushroom.com/product_i...ns-nt1-p-20496
Found the leaking off the diff was comming from the gasket so I seated one of the orings in the groove where the diff case(lid) sits and no more leakage!
I just had this gear laying around from my Tc days
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