MW8.5RA RULES 2014
(Midwest 8.5 Racers Association)
"Crazy 8's"

FORMAT
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.

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

TIRES
26x8.5 slicks- May have Mickey Thompson(3052) or Hoosier (18115C11) only.

BODY
The car must retain its original appearance, profiles, and dimensions. Factory roof and quarter panels must be used. Aftermarket fiberglass and/or carbon fiber replacement panels are limited to hood, front fenders(no full body pro mod/funny car style front end's), doors, deck-lids, and bumpers only. All front ends must be of factory dimensions and cannot be stretched. Aftermarket wings and spoilers are permitted. Complete stock appearing front and rear bumpers are required. A hood must be used. Forward facing hood scoops/turbo or supercharger inlets are permitted. Beam trippers, extenders prohibited.

INTERIOR
Factory appearing dash, door panels, and driver seat in stock location required. Carpet may be omitted for safety. Factory floor pan on driver and passenger side required. Must have factory transmission tunnel(no removable transmission tunnel) Aftermarket steering column permitted.

WINDSHIELD/WINDOWS
OEM glass or lexan windows are permitted.

CHASSIS
Complete stock chassis and frame rails must be retained from shock tower to behind the rear wheel opening. 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. Smith racecraft bolt in style front ends allowed(must have approval).  Factory wheelbase must be maintained.  Coil spring on upper a-arm vehicles may install aftermarket Mustang a-arm or strut type front suspension (must have approval). Pre 48 model cars allowed to replace frame and suspension with typical street rod type replacement suspensions, no round tube frames or race car 4-links allowed.

EXHAUST
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.

SUSPENSION
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.

ELECTRONICS
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.

TRANSMISSION – any automatic or manual transmission allowed

FUEL – Any race fuel, ethanol or alcohol.  No Nitro

WEIGHTS

Base weights

SBNA 2500

BBNA 3000

SBN20 3000

BBN20 3250

SB BOOST

Blower(single blower limited to F1R or equivalent)

F1A/YSI/6-71 or equivalent  3100

F1C/8-71 or equivalent 3200

F1R/F1C 10.5/XI/10-71 or equivalent 3300


Turbo(single turbo limited to 88mm)

67mm and below 2900

68-72mm 3000

73-76mm 3100

77-82mm 3200

83-88mm (no billet wheels) 3350

** No billet wheels on any turbo larger than 82mm
Turbocharger size will be verified by measuring the impeller wheel tip to tip or by go no go gauge.  Stepped or clipped compressor wheel prohibited.  Surge holes/slots are ok.

GENERAL WEIGHT RULES

-50 Mickey Thompson (3052)

-50 Air to Air or Non Intercooled (Race gas only)

-50 Blow through carb

-50 Belt driven centrifugal supercharger

+100 Billet wheel turbo(No billet wheels allowed above 82mm)

-50 for small block Boosted factory valve angle heads(20*Ford, 23*Chevy, 15*LS  18*Mopar, Modular, BOP/AMC) (No raised runner or high port SR20 –FT1 or T1RI or equivalent )

-50 Iron headed combos (NA or N20)

-50 Small block under 380 CI (NA or N20)

-50 Big block under 555 CI (NA or N20)

-50 4150 Carb (NA or N20)

-150 Big block BOP/AMC

-150 for small block NA and N20 factory valve angle heads(20*Ford, 23*Chevy, 15*LS  18*Mopar, Modular, BOP/AMC)(No raised runner or high port SR20 –FT1 or T1RI or equivalent)  

-200 6 cylinder

-800 4 cylinder


SMALL BLOCKS—N2O/BIG BLOCKS-N20

Any single carb or throttle body allowed

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

Any engine with more than 440 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)

No sheet metal intakes allowed, only cast, commercially available

Allowed any single stage plate system including crossbar and diffuser style. May have one fuel and one N2O solenoid max on carb applications. EFI allowed dry 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

Single line only from N20 bottle to N20 solenoid and must have a single reduced 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.

-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)

Single carb or throttle body allowed

No sheet metal intakes allowed, only cast commercially available. Custom elbow ok

Methanol injection legal

Forward facing turbo/blower legal

Gear drive for blower legal

No reducers

Any Intercooler allowed


SMALL BLOCK-NA

Must be naturally aspirated

Aftermarket cast iron/aluminum blocks ok (no billet)

No CI limit

Any heads

Sheet metal intakes allowed

Multiple carb/throttle body legal


BIG BLOCKS–NA

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

Sheet metal intakes allowed

Multiple carb/throttle body legal

 

Car tech will be done randomly at races. 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.

PARITY – OFFICIALS MAY IMPOSE RESTRICTIONS TO ANY PARTICIPANT DISPLAYING ADVANTAGEOUS PERFORMANCE.

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

MW8.5RA RESERVES THE RIGHT TO CHANGE OR MODIFY RULES IF NECESSARY NO LESS THAN 14 DAYS BEFORE NEXT SCHEDULED RACE

EMAIL MW85RA@YAHOO.COM FOR QUESTIONS OR CONCERNS

 

Website Builder