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Ofna - OFNC1438 OFN14333 14333 023705143339 0023705143339
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Ofna 1/8 Nitro Dirt Oval Hyper Sprint RTR
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Ofna 1/8 Nitro Dirt Oval Hyper Sprint RTR
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Tower Catalog Page: 79

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Tech Notes
This is the radio controlled, glow powered, 1/8 scale, ready to run
Dirt Oval Hyper Sprint Race Car from Ofna.


Chassis: CNC aluminum 0.12" (3mm) thick, based on the Ofna Hyper 8.5
Drive: Four wheel shaft
Radio: Team Hobao 2-channel 2.4GHz with steering and throttle trim
and reverse, heavy duty steering and throttle servos, transmitter
has charge jack for optional NiCd packs
Engine: MacStar 28 .28 cu in (4.6 cu in) with slide valve carburetor
remote glow igniter, glow plug, two stage air filter and pull
Exhaust: Polished aluminum tuned pipe
Clutch: Three shoes, composite construction
Clutch Bell: 13 tooth steel
Fuel Tank: 4.2oz (125cc)
Brake: High performance dual steel discs
Differentials: Three, planetary gear design
Wheels: Plastic, white in color dish type 1.5" (39mm) wide 3.03"
(77mm) diameter, 17mm hex size
Tires: Front, 1.7" (43mm) wide, 4.6" (116mm) diameter
Rear, 2.3" (59mm) wide, 4.8" (123mm) diameter
both with foam inserts
Shocks: Aluminum body oil filled, 12mm diameter
Shock Towers: 0.12" (3mm) thick aluminum
Suspension: C-hub, front and rear swaybar
Spur Gear: 46 tooth steel
Body: Plastic, white in color with decals applied, separate high
downforce front, main and rear wings
Steering: Bell crank type with servo saver
with laydown steering servo position
Caster: Adjustable, caster/toe-in refers to the angle of the front
suspension when viewed from the side of the car in relation to the
Camber: Adjustable, camber refers to the angle of the tops of the
tires from vertical when viewed from front or behind vehicle
Ackerman: Adjustable, Ackerman refers to the inside front wheel
turning faster than the outside front wheel during turns


Ofna Dirt Oval Sprint kit with MacStar .28 engine, air filter, shocks
tuned pipe, 2-ch radio, instruction manual, painted body, front,
main and rear wings


AA Cells: Eight for transmitter
Receiver Battery: 5-cell hump pack, at least 1400mAh (do not use
AA or AAA batteries)
Glow Igniter
Fuel: Car blend with 10-25% nitromethane cantent
Building and track equipment


Length: 19.7" (500mm)
Front Width: 12.2" (309mm)
Rear Width: 13.5" (342mm)
Height: 14.4" (365mm)
Wheelbase: 12.7" (322mm)
Weight: 8.3lbs (3770g) ready to run
Length: 13.6" (346mm)
Width: 4.7" (120mm)
Height: 5.5" (140mm) at highest point
Carburetor Settings-
Throttle Stop Screw: Throttle opening should be about 1mm
Needle Valve: 6-1/4 turns counter clockwise from closed
Midrange Needle: Factory preset at 1/2 turn counter clockwise from
closed (adjustment not recommended)


For Replacement Ball Bearings use:
Qty. Size Location Qty. Bearing Set
4 8x16mm Fr Hubs 2 DTXC1585
4 8x16mm Rear Hubs 2 DTXC1585
2 8x16mm Fr Gearbox 1 DTXC1585
6 8x16mm Differentials 3 DTXC1585
2 5x10mm Clutch 1 DTXC1535
2 8x16mm Rear Gearbox 1 DTXC1585

jxs 3/03/09

– If you need more information, use these Ofna resources –
Web Site:
Phone: 949-586-2910
  Postal Address:
IRVINE, CA 92618

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Accessories Needed

Accessories for the Ofna 1/8 Nitro Dirt Oval Hyper Sprint RTR

Primary Accessories   Building & Field Equipment Optional Accessories
  Special Stock Number Product Description Parts Saver Eligible Tower's
Low Price
Click to Order Quantity Needed In Cart? Stock
 LXBBS3 Cool Power Sidewinder Pro 20% N 10% O Quart
Qty Discount Available
9.49   In Stock
 LXVRH2 Duratrax NiMH 5-Cell 6.0V 1600mAh Hump Rx U
Qty Discount Available
14.99   In Stock
 LXD531 Duratrax Kwik-Pit 250cc Fuel Bottle
Qty Discount Available
5.99   In Stock
 LXDHJE Duratrax Onyx AA Alkaline Battery (8)
Qty Discount Available
5.49   In Stock
 LXNK66 Futaba FBC19B4 Dual AC Wall Charger
Qty Discount Available
19.99   In Stock
 LXJUJ6 Tower Hobbies AA Slim Glow Starter
Qty Discount Available
9.49   In Stock
Subtotal for this Group of Accessories: 65.44  
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Primary Accessories   Building & Field Equipment Optional Accessories

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