Only about a week to go until the 2024 G Force Competition Cup! 😀(#gfcc).
I'll be entering my 870c into the Vintage Buggy Class. The Super Dog Fighter is a great buggy overall, but its vintage design means it's kinda out of its element on an indoor carpet track. 😅 Some "short comings" of the kit setup include:
lack of suitable tires for the vintage sized wheels
lack of wheels that fit the kit wheel hubs
FRP chassis flex causing the belt to skip
poor L - R weight balance
very short dampers with limited stroke and no optional springs.
Yokomo have recently put out some optional 2.2 inch wheels and carbon pieces to replace the factory FRP ones. But still nothing for the shocks.
I've spent the last six weeks in a cycle of modify, test, modify and test again in an effort to improve on the 870c's performance. This footage was from the final day of testing. I suspect I'll have to make minor adjustments when I run at Tsukuba for the first time.
SPEC LIST:
Carbon Main Chassis
Carbon Upper Deck
Carbon Servo Mount
45g Weight Added to improve balance
Wide Rear tread
JC Racing 2.2 Wheels
VP Racing Hyrbid Evo Front
VP Racing Pyramid Evo Rear
Carbon Shock Towers
Modified Stock Dampers
Kyosho Springs
Shock Oil Front 600
Shock Oil Rear 550
69T Spur
35T ~ 38T Pinion (will decide at the venue)
ELECTRONICS
G Force Neo Fast 21.5T Brushless Motor
Hobbywing Justock ESC
G Force Dyna 3800 Lipo
Futaba Reciever
Savox Servo
Motor Cooling Fan
This final setup is a bit of a compromise between performance, risk and aesthetics. During testing I fitted several different carbon shock stays, but their design made them prone to failure in the event of a collision. The best handling was achieved with the Big Bore Shock Tower set by Unfair RC. This allowed me to "borrow" the dampers from my YZ-4 SF2. And that totally transformed how the buggy jumped. Ultimately I decided against using them for two reasons. First, personal opinion, but they seemed too large for the buggy and looked somewhat out of place. Second, the large number of pre-drilled holes for upper link and shock mounting creates a failure point. That combined with them being REALLY tall made me wary of using them in a race situation. A crash (which can be seen in my previous 870c video) split the carbon shock tower from H2-RD right where several holes had been drilled for the upper links.
So hopefully my 870c will do ok, There are forty participants in the Vintage class, including the Legend Himself, Masami Hirosaka, so I don't think i've got any chance of a podium finish. But it would be nice to come somewhere in the top twenty...😊
Негізгі бет Yokomo Super Dog Fighter 870c G Force Competition Cup Indoor Carpet Track Testing
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