Home

Venues

Records

Schedules

Standings

Rules

Tech tips

Associates

Contact us

About us
































MHOSA Rule Book
[ Download Word Doc | Download Handbook Version (Word Doc) note page order 2341 ]
Go to: [ RO | Club Stock | Slip-on | CerMod | X-jet | Scoring ]
General Rules
Car
 1) The maximum width of any car is 1-5/16 inches (1.312”).
2) The maximum allowable lateral movement of the front axle is 1/32 inch.
3) After technical inspection (qualifying), and during the race, any part of the car may be replaced except for the chassis, and magnets (motor & traction).
4) Car body must cover the chassis when viewed from above (except through legal openings).
5) Any car without a body or with an interfering body will not be allowed to continue.
6) Decisions regarding rule interpretations will be made by the head marshal (computer marshal).
7) Cars may be subject to a tear-down to satisfy technical inspection.
8) New parts introduced by suppliers after the season begins are NOT allowed during that season.
Race Format

- Technical inspection time: 1:15 p.m. weekend days, 7:15 p.m. weekdays unless otherwise specified.
- Race start time 15 minutes after technical inspection (The start of races will not be delayed.  Late comers, if in time, may enter the second round heat)
- Each 'on time' entrant is guaranteed two races.
Five minutes between Qualifying and races

Qualifying
- Entrants must pay raceway participant fee and pass technical inspection.
- A replacement car may be entered if the original car is withdrawn and an additional  participant fee is paid.
- Race host must pay full participant fee to MHOSA for additional entries.
- Replacement cars will lose lane choice earned by original car.
- Each entrant will have 45 seconds on a lane of choice to record a qualifying time (RO only).
- Fastest lap times will be recorded.

Qualifying Heats
- 120-second lanes, 90 second lane changes
- All entrants will be grouped into round-1 heats of up to six racers or round robin.
- Round-1 race starting heat and lane choice will be determined by Qualifying time (RO) or points leaders (SN).
- All entrants will be grouped into round-2 heats of up to six racers or round robin.
- Round-2 race starting lane choice will be determined by round-1 results.
- Lane choice will be determined by best qualifying heat lap total.

Main (RO only)
- 180 second lanes, 90 second lane changes
- Each entrant's best qualifying heat lap total will be used for Main qualification.
- The best individual heat lap totals will qualify for Main.
- The number of Main qualifiers will equal the number of lanes.
- Remaining placements will be determined by qualifying heat lap totals.

General
- The lane change interval will not normally be delayed by, or for a heat racer.  (if requested by an entrant with a legitimate mechanical problem, an additional 120 seconds will be allowed once during qualifying and once during the Main)
- Every entrant must act as a track marshal (and spot de-slotted cars) while not racing.
- Any number of 'sit outs' may be used to accommodate track marshaling.
- At least two marshal are required for the Main.
Run-time Rules
- Drivers are responsible for marking track position, color coding their car, and making lane changes.
- Drivers are not allowed to marshal.  One warning per race (not per Driver) -- penalty: one lap for each instance.
- Marshals must immediately give a car (and parts) in need of repair to the Driver.   Marshals may repair the car only if the Driver instructs the Marshal to do so, however, Marshal must not abandon marshaling duties to repair a car.
- Racers are responsible for marking track position during lane change periods.
- Only marshals will be allowed to remove or place cars on track during a lane heat.
- Racers must stand clear of opponents' view of the track.
- "Track calls" (pause race) will not be permitted.
- Marshal shall use care to spot de-slotted cars near the position where the care left the track.
- Head Marshal (Computer Marshal) makes all final decisions during races.
Event Scoring
- Fast lap times will be recorded in Qualifying sessions.
- Total laps/sections, fast lap times, and lane lap totals will be recorded for all qualifying rounds and the Main.
- If an entrant removes his/her car before section numbers can be verified, no sections will be credited.
- Championship points will be awarded according to the points system schedule below.
- If four racers or less are in attendance 30 minutes after scheduled start, each entrant who pays the entry fee will receive 24 championships points (but no official placement).  Attending racers may qualify for qualifying points.

Track Record Criteria
- All lap times and totals must be verifiable by other entrants. (must be captured by computer or print-out after the heat race)
- Official Records Kept: fastest lap (each lane), most heat laps (each lane), total laps/sections (race)
- Records will only be established/broken during an actual race event (not during practice)
- Unreasonably low lap times will be assumed to be a lap counting equipment error and not be official.
General Rules


Restricted Open
Car - Any commercially available HO scale chassis
- Any commercially available polymer magnets
- Any tires, any axles, any gears
- Any electrical components
- Body must cover tires as viewed from above
- Car must slide through a 1.312 inch tech block.
- No more than 1/32 inch lateral front axle movement.
- No ball bearings.

MHOSA Club Super Stock
Car Rules Chassis – any stock, commercially available chassis is allowed, i.e. Tyco, Super G+, G3, Wizzard Patriot series, Wizzard Scorpion and Storm, Slottech Panthers and Thundercat, Life-Like. Retainers for axles, bushings and magnet clips are allowed. Pickup shoe tabs may be reinforced. Body mounts are allowed. Sanding the bottom ONLY of the car (chassis and magnets) is allowed.
Armature – Any of the armatures listed in the table below are allowed.  Truing of commature and balancing are allowed.  No wide gaps, no other alterations are allowed.
Wizzard
- A3P01 STOCK P3/P2 ARMATURE
- ST01 STOCK TYCO ARMATURE
- LLS01 STOCK LIFE-LIKE ARMATURE
- WS01 Stock Storm/Patriot Vortex Armature
- SP04L Hot Stock Life-Like armature
- SP04P Hot Stock Patriot armature
- SP04PA Hot Stock Patriot armature with advanced timing
- SP04T Hot Stock Tyco armature
BSRT
- 8822 Stock G+ Arm ($4)
- 138 Hot Stock Arm 440 x 2 ($10)
- 146 G3 Advanced Hot Stock Arm ($15)
- 147 G3 Platinum Hot Stock Arm ($15)
- 148 G3 G+ Hot Stock Arm ($10)
- 149 Gold Power Hot Stock Arm ($12)
note: "Spinner Spud" is not allowed.
Slottech
- 102 Stock Thunder Cat / Panther Arm
- 102-1 Same as 102 but longer shaft
- 104 Stock Tyco / Panther E.B.T. Arm
- 104-1 Same as 104 but longer shaft
- 104-2 Same as 104 but w/ advanced timing

Electrical – Any stock or stock replacement electrical parts are allowed. Shunt wires are not allowed.
Tires/Wheels – Any stock or stock replacement tire/wheel combinations are allowed. Independent front tire/wheel assemblies are allowed.
Body – Any bodies are allowed. Vacuum-formed (Lexan) or stock plastic body. Stock plastic bodies may be sanded or shaved. Windshields may be removed from the stock plastic body. Body must cover the entire motor and drive train when viewed from above.
Magnets – Any stock ceramic magnets are allowed. Magnets can not be modified or cut in any form and must be mounted in the stock position and orientation.
Gears – Any gears may be used.
Bushing – Any stock or stock replacement bushing are allowed. Ball-bearing assemblies are not allowed.
Guide Pin – one Stock or Stock replacement mounted in stock position.  Guide pins may be glued.
Additional Lite Driver Class restrictions - Only Patriot Chassis are allowed.  Phase II polymer magnets are allowed.  Phase III (RO) Polymer magnets are not allowed.
Additional Premier Driver Class restrictions - Only stock ceramic magnets are allowed.
Additional Slip-on Driver Class restrictions:
Only slip-on tires are allowed - silicon foam tires are not allowed.
Silver electrical parts are not allowed.
Sanding and cutting of chassis is not allowed.
Only 7-tooth pinion and 25-tooth crown gears (7x25) are allowed.
Only Wizzard patriot stock and stock replacement motors are allowed (A3P01, WS01, SP04P, SP04PA).  No other motors are allowed.
Fixed ohm controllers only.


Ceramic Modified (CerMod)
Car Same as Club Super Stock rules except: Any motor is allowed
Note: there is no 'Slip-on' Driver Class for CerMod.


X-jet (non-magnet)
Car Rules Chassis – any stock, commercially available chassis is allowed, i.e. Tyco, Super G+, G3, G-jet, Wizzard Patriot series, Wizzard Scorpion and Storm, Thunder-storm. Retainers for axles, bushings, body mounting posts, body mounting clips, and magnet clips are allowed. No modifications or altercations allowed.  No sanding. 
Armature – Any
Electrical – Any commercially available electrical parts are allowed. Shunt wires are not allowed.
Tires/Wheels – Any commercially available tire/wheel combinations are allowed. Independent front tire/wheel assemblies are allowed.
Body – Any bodies are allowed, but must cover the entire motor and drive train when viewed from above.
Motor Magnets – Only stock ceramic motor magnets are allowed. Motor magnets can not be modified or cut in any form and must be mounted in the stock position and orientation.
Traction Magnets -- No traction magnets allowed. 
Handling Weights -- Commercially available brass handling weights (and spacers, if any) designed for use with the chassis on which they are used are allowed.
Gears – Any
Bushing – Any commercially available bushings and spacers are allowed. Ball-bearing assemblies are not allowed.
Guide Pin – one commercially available guide pin allowed in stock position.  Guide pins may be glued.

Lite Driver Class restrictions - Only box-stock G-jets and stock replacement parts are allowed.  Must used injection molded hard plastic body with standard AFX mounting.

Revision 19 April 2010 - Slottech Panthers and Thundercats, Life-Like are not allowed.

Miscellaneous
Season
Champion-
ship Scoring		 - Championship seasons are Fall (September - December) and Winter (January - April).  Summer Season is not a championship season.
- Season point totals for each racer will determined by adding the individual's race scores for the season.
- A predetermined number of races will be dropped each season - see season's standings page.
The racer with the highest point total at the end of the season will win the season championship and associated prize.
- Season Tie Breaker: 1) most wins, seconds, etc., 2) best throw away, second best throw away, etc., 3) place in season finale.
Other
Recognition

 - Determined by points totals: second in season championship, third in season championship.
- Determined by MHOSA secret ballot (no tie breakers): best track marshal, best sportsman (Hohnstien Award)
Champion-
ship
Points
System

 Note: points are awarded for placements in both Lite and Premier driver classes.
 
Restricted Open
Club Stock Series
 Alternate,
X-jet
Top qualifier
3
n/a
 n/a
runner up 
2
n/a
 n/a
second runner up 
1
n/a
 n/a
first place 
24
8
 12
second place 
21
7
 11
third place 
18
6
 10
fourth place 
15
5
 9
fifth place 
12
4
 8
sixth place 
9
3
 7
seventh place 
6
2
 6
eighth place 
3
1
 5
ninth place 
n/a
0
 4
tenth place
n/a
0
 3
eleventh place
 n/a
 0
 2
twelveth place
 m/a
 0
 1


Revisions Established January 2000
revised August, 2003
revised August, 2004
revised Summer 2005
revised Summer 2007
revised Fall 2009