2020 rules


****NO Weights repeat no scales we won't be weighing cars***

To  make this simple no weighing in 2019 and 2020 also if your car is legal still to  the 2018 rule set you are allowed no min weight and Pro 8.5 tire. If  you aren't legal for prior 2018 rules then you must run Hoosier 8.5  tire. We still require no 4 link no tube chassis cars at Ozark and  Mo-Kan but at US 36 any door car allowed on Hoosier 8.5 tire.

New 5.50 ET class

Breakout not allowed..

1st round losers in main class can drop to 5.50 class as they run second round of eliminations.

$200 winner via Tile and Stone Warehouse $100 runner up and $50 for semis.

Only rules for 5.50 is 26x8.5" or 235 radial tire of any type, Door cars only no throttle stops.


565" BBC 12" -4 with a plate legal at any weight on a Pro 8.5 tire.

Small block nitrous anything goes legal on pro 8.5 tire. Good luck and may the force be with you.

Boosted F1r or 82mm turbo legal on Pro 8.5 tire no min. weight.

Examples of only allowed on a Hoosier 8.5 tire:

Boosted 118mm turbo legal on Hoosier 8.5 only no min. weight

960" Musi 5 stage fogger legal on Hoosier 8.5 tire no min weight.

F3 136 on 565" BBC legal on Hoosier 8.5 no min weight.

*** indicates change made from previous rule set)

***No restrictions on Small Block Nitrous. -6 line, trash can fogger and sheet metal intake allowed and pro tire.

***2nd Chance race will have ½ the points per round that the regular race has

***Some front end tolerance allowed on classic cars message for details

***All cars must have title 2019 series sticker on car to earn winnings <sticker will be series name and title sponsor>

This is an 1/8th mile heads-up class run on a .400 pro tree with a pro ladder.
Class  is designed for rear wheel drive small block and big block vehicles  with single stage plate systems, boosted small blocks and naturally  aspirated small/big blocks.

All NHRA/IHRA and local track safety rules apply for driver and car.

26x8.5  slicks or 235 radial- May have Mickey Thompson (3052) ET Street 235  Radial (3752R)  or Hoosier (18115C11) only. Pro allowed on 2018 legal  combo.

The car must retain its original appearance,  profiles, and dimensions.  Aftermarket fiberglass and/or carbon fiber  replacement panels are allowed.  All body panels must be factory style.   No 1 piece bodies or full composite front ends.  Must have  separate detachable hood and hood must be used.   Aftermarket wings and  spoilers are permitted.   Forward facing hood scoops/turbo or  supercharger inlets are permitted. Beam trippers, extenders prohibited.

Must  have factory style dash and door panels. (Aftermarket  replacement fiberglass, aluminum, carbon fiber allowed). Carpet may be  omitted for safety. Factory floor pan on driver and passenger side  required. Must have factory transmission tunnel.  Aftermarket steering  column permitted.

OEM glass or lexan windows are permitted.

Stock  chassis and frame rails must be retained from shock tower to the rear  wheel opening (notching permitted). Back halved cars are not permitted.  Front core support may be modified or removed. Aftermarket bolt-on  replacement front K-members/sub frames are allowed. Front shocks must be  in factory location.  Shock tower can be notched or trimmed but must be  in factory location.  Firewall may be modified but must be factory.   Bolt in style front ends allowed.  Factory wheelbase must be  maintained.  No round tube frames or race car 4-links allowed.

Mufflers  or inserts are required on all cars except for turbo cars. Exhaust may  exit underneath car or out the front fenders but must not affect timing  or staging beams.

Stock style, ladder bar or torque  arm suspension cars only. Aftermarket four links are prohibited on all  cars. Aftermarket replacement components such as: front control arms,  rear control arms, front coil over shocks, and rear coil over shocks are  permitted. Rear suspension may be moved to accommodate tire clearance  and does not need to be mounted in stock location. Wheelie bars  prohibited.

Any ignition or efi system on all  combos. Boost controller legal. N2O controllers legal.  Traction control  legal. Data logging allowed.   No optical devices. Must have working  headlights and taillights. Any charging system legal.


Any automatic or manual transmission allowed


Any race fuel, ethanol or alcohol.  No Nitro

WEIGHTS There are no weights....

Blower(single blower limited to F1R or equivalent)

F1R/F1C 10.5/XI/10-71 or equivalent

Small block Turbo(single turbo limited to cast 88mm)(Twin turbo limited to 62mm max)

Billet 82 allowed on Pro tire


***CID limits are same  BB 598 for pro tire


Foggers allowed on small blocks  Not allowed on BOP/M and BB if you want Pro 8.5 tire

Small block Nitrous allowed Pro8.5/235 tires

***Can’t have a fogger and a plate both in use.

Any single carb or throttle body allowed. Sheetmetal intake allowed on Small block Nitrous

Aftermarket cast iron/aluminum blocks ok(No billet), any cast heads ok on small blocks(No billet)

Any engine with more than 456 ci will run under big block rules

Big  blocks MAX deck height(10.2 Chevy, 10.3 Ford, 10.7 Mopar, Any BOP  No  billet) 599 MAX CI and conventional heads only(We will refer to X275  accepted list of heads for reference of acceptable heads)

Big blocks no sheet metal intakes allowed, only cast, commercially available(may be modified runners must be cast)

Big  blocks allowed any single stage plate system (If in question must have  approval)  May have one fuel and one N2O solenoid max on carb  applications. EFI allowed dry/wet plate kit or 2 nozzles with 1 N20  solenoid max.  Foggers can be installed on car but must be capped before  tech.

May have an inline single purge solenoid which must exit away from intake

Nitrous controllers allowed.  Water injection legal.  No cold boxes etc.

Single  line only from N20 bottle to N20 solenoid and must have a single line  that's 12" MINIMUM of -4an line with -4an fittings MAX entering N20  solenoid. Nano or other pressure regulating systems are allowed. Only a  single N20 bottle may be mounted and hooked to n20 feed line.

-4 line I.D. of  .230 max
-4 fitting I.D. of .160 max  ***A spec line can be purchased from MW8.5RA

BOOSTED(SMALL BLOCK ONLY)(No N20 any boosted combo except 4cyl)

Aftermarket cast iron/aluminum blocks ok (No billet/exception 4cy), any cast heads ok (No billet/exception 4cy)

Budget sheet metal intakes allowed on boosted combos example Holley Sniper, Symbol ect.

Max ci 440

Single carb or throttle body allowed

No sheet metal intakes allowed, only cast commercially available(may be modified runners must be cast). Custom elbow ok

Methanol injection legal

Forward facing turbo/blower legal

Gear drive for blower legal

No reducers

Any Intercooler allowed


Must be naturally aspirated

Aftermarket cast iron/aluminum blocks ok (no billet)

No CI limit

Any heads

Any intake

Multiple carb/throttle body legal


Must be naturally aspirated

Aftermarket cast iron/aluminum blocks ok (no billet)(Max 10.2 deck Chevy, 10.3 Ford, 10.7 for Mopar, any BOP)

632 MAX CI

Any heads

Any intake

Multiple carb/throttle body legal

*****All  cars will be teched at their first race appearance. After, cars will be  teched randomly to ensure compliance with the rules. 

 If found  in violation of rules(that are considered to gain an unfair advantage) a  one race suspension will be put in place. 2nd offense removal from  series for rest of season.

******The second chance ladder will be created by drawing names from a hat for simplicity and excitement! 


LEGALITY  OF ANY CAR IS THE DECISION OF THE RACE/TECH  DIRECTOR.                                                                               



 Points payout is as followed(You must be a MW8.5RA member to receive points)
1st $1000
2nd $500
3rd $300
4th $200
5th $100
Points Rules:
-We  will use your top 7 out of 9 race totals.  If a race is cancelled we  will use that as one of your dropped races.  If you make it to all the  races you will be allowed to drop your 2 lowest point totals
-You must be an MW8.5RA member to receive points.  If you do not already have a permanent number one will be assigned to you.
You  must run the same car number in each points race. Car numbers are how  we keep track of who has earned how many points. If you don’t have the  same car number you signed up with, you won’t get the points. If there  is another car with the same number at a points race and a track  official changes your number, please see the race director or points  person to ensure you will still get your points for that race.
Either  the driver or the car must match the MW8.5RA registered number in order  for points to be awarded.  A member can drive a different car in a race  other than the one registered as long as that other car meets MW8.5RA  rules.  A different driver may race a member’s car and registered  number.  A different driver may not race a different car using a  member’s number.
There can be no switching drivers or switching cars once a racer has made their first qualifying pass.   

IS Induction Solutions Points

How Points are awarded:
5 points for tech card purchase
5 points for each round win
2 points for ET record(Only at end of each race) 
2 points for MPH record(Only at end of each race)
1  point for each completed pass during qualifying (this point will not be  given if the qualifying session is interrupted and not completed)
5 points for #1 qualifier for the weekend
4 points for #2 qualifier for the weekend
3 points for #3 qualifier for the weekend
2 points for #4 qualifier for the weekend
1 point for #5 qualifier for the weekend

Tile and Stone Warehouse 2nd Chance

2nd Chance Points

2.5 points each round win

Protest for CID $300. (If racer is illegal $100 to MW8.5RA and $200 to protester if legal $100 to MW8.5RA and $200 to racer)

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