TXDRL Rules

TXDRL Class Rules

Battle of the Backhalves | Tuff Street | Evil Street | Pro Index Class

ALL DRIVERS, PIT CREW AND FAMILY MEMBERS WILL BE EXPECTED TO ACT IN A PROFESSIONAL MANNER. IT IS THE DRIVERS RESPONSIBILITY TO ENSURE THAT ALL PIT CREW MEMBERS AS WELL AS FAMILY MEMBERS ADHERE TO THIS RULE, ANY VIOLATION WILL RESULT IN DISQUALIFICATION AND LOSS OF ENTRY FEES, IF DEEMED SERIOUS ENOUGH OR IT BECOMES A PROBLEM AT LATER RACES IT IS UP TO THE DISCRETION OF TXDRL TO BAN THE INDIVIDUAL FROM FUTURE RACES.

BATTLE OF THE BACKHALVES

OLD SCHOOL BACK HALVES ONLY.
- 70% STOCK FIREWALL AND FLOOR PAN TO BEHIND THE DRIVERS SEAT
- IF FLOOR HAS BEEN REMOVED OR REPLACED MUST BE *WELDED BACK* IN STOCK LOCATION WITH FACTORY REPLACEMENT PANELS
- MINOR MODS FOR EXHAUST SYSTEM AND ROLL CAGE BARS ALLOWED
- REMOVABLE TRANS TUNNEL OK (just over the trans for removal -not all the way back to the rear)
REAR SUSPENSION
- 4 LINKS AND LADDER BARS ALLOWED
- WHEELIE BARS ALLOWED
FRONT SUSPENSION
- MUST BOLTED IN STOCK MOUNTING HOLES
- AFTERMARKET K MEMBERS AND SUB FRAMES ALLOWED AS LONG AS BOLTED IN STOCK LOCATION
INTERIOR
- DRIVER SEAT MUST BE IN STOCK LOCATION.
- ALUMINUM . DASH AND DOOR PANELS OK
- LEXAN ALLOWED
EXTERIOR
- MUST BE STOCK APPEARING
- FACTORY APPEARING HEADLIGHTS AND TAILLIGHTS, HEADLIGHT DECALS OK
- FIBERGLASS BODY PARTS ALLOWED
- FORWARD OR REAR FACING HOODS SCOOPS ALLOWED
MOTOR, TRANSMISSION AND POWER ADDERS
- NO BLOWERS OR TURBOS
- MAX CUBIC INCHES: 10.2 deck max deck height... a 640inch max rule.. a 4.75 stroke with a 4.63 bore is 639.79cid..
- ANY OEM TRANSMISSION
WEIGHTS
- BIG BLOCKS #3000
- SMALL BLOCKS #2700
- 100 LB WEIGHT BREAK FOR CONVENTIONAL HEADS
- 100 LB WEIGHT BREAK FOR NO WHEELIE BARS
- 100 LB WEIGHT BREAK FOR SINGLE CARB AND CAST INTAKE
- 200 LB WEIGHT BREAK FOR ALL MOTOR NO POWER ADDERS

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TUFF STREET

Chassis
- Stock Front frame rails (must be in stock location).
- Aftermarket control arms and bushings allowed as long as they bolt in stock locations.
- Rack and Pinion steering allowed.
- Aftermarket strut is allowed but must follow the following guidelines:
  - Full on race strut prohibited ( ie. Lamb or equivalent type )
  - Bolt in stock location with the exception of aftermarket K-Member
  - Strut must be comparable to QA1 or Strange style (adjustable)
  - Struts that changes caster and camber are prohibited
- Aftermarket Coil shocks allowed
- ALL replacement parts must be in stock location
- K-Members allowed (late model Mustangs, Camaros and Firebirds)
- K-Members must feature stock attachment locations
- No part of the K-Member may be permanently attached to the chassis
- Rear Frame rails must be in original stock location (minor notching allowed for tire clearance)
- Mini Tubs allowed
- Any rear suspension allowed, 4-links, ladder bars, etc.
- Motor Plate and Mid Plate allowed
- Motor must be in stock location
- No traction compound spraying devices allowed.
Body
- Firewall must be in stock location, minor modifications for trans, etc is OK.
- Floor pan may be patched or repaired with welded in factory replacement panels. May be altered for thru the floor sub-frame connectors, etc.
- No body alterations.
- Factory headlights and taillights
- Fiberglass ok. No one piece fiberglass front ends. Fiberglass replacement parts must look factory.
- Forward facing hood scoops limited to 6" tall.
- Drilling/cutting holes in hood for air inlet prohibited
- No Pro Mod style wings. Max Wing 15" from leading edge
- Lexan allowed
Interior
- Two Front seats, turbo/supercharger cars may remove passenger seat for plumbing. Nitrous cars may remove passenger seat if bottles mounted in area.
- Driver Seat must be mounted in front of Door Jamb
- Carpeted interior
- Door panels (aluminum door panels allowed)
- Stock Dash (aftermarket gauges allowed)
Tires
- 10.9 Tread width only, NO W's. Hoosier part # 18192D05 will not be allowed. MT 28 x 10.5 W are allowed.
- 12.5 sidewall designation DOT Tires max not to exceed 10.9 inches of tread
- Max P295/65R15 drag radial. 10.9 Tread width max
Power Adders
- Only ONE type power adder allowed
- Timers and controllers are allowed.
- Progressive nitrous controllers and data recorders allowed.
- Conventional headed small blocks limited to two single stage systems.
- Big blocks and non-conventional headed small blocks limited to one single stage nitrous system.
- Dual entry plates are allowed 1 nitrous solenoid -1 entry point and 1 fuel solenoid 1 entry point allowed. Additional nitrous systems must be capped off at the solenoids.
- Dual stage, single nozzle foggers are not allowed.
- Push systems prohibited.
- Maximum nitrous supply line from bottles to solenoid is a single #6 line. Multiple nitrous bottles must be "Y" together at the bottles and a single #6 line from the "Y" to solenoids.
- Max 91 MM turbo inlet. Air to liquid intercooler allowed. Measurement will be a 1/16th of an inch away from the compressor wheel. If it measures more that 91 MM or if the leading edge is more than a 1/16th away from the compressor wheel then the turbo is illegal. NOTE: All turbo entries must have measuring tool and demonstrate all measurements are legal, do not show up without it or you will not be allowed to run.
- No aftermarket fabricated turbo inlets.
Transmission
- Automatic or factory equipped manual.
- NO Brunos, Lencos etc.
Engines
- NO Sheet metal Intakes
- Must use mass produced cast aluminum intakes (no tunnel rams)
- Single Carburetors only
- EFI max 90 MM throttle body. 1250 CFM max
- All cars must run gasoline (no alcohol or methanol)
- Dry Sumps Not allowed
- All big block engines limited to 10.2" deck height.
Heads
- Billet or custom fabricated heads prohibited.
- Internal port areas of cylinder heads may be welded or epoxied for repairing, but heads must maintain standard "as produced" valve/port layout design, valve cant, and valve spacing. (no substituting canted valve for inline head, etc.)
- Big Block cylinder heads must be conventional style and retain 24* style port/valve configurations. No BBC 18* heads allowed.
- Small Block cylinder heads must be conventional style with a minimum 15 degree valve angle .
- All valve angles will be + or - 1 deg.
- No Big Chief, Big chief style or SB2 or SB2 style heads.
- Porting allowed.
- Yates heads will be allowed on nitrous entries, see weight breaks.
Exhaust
- Mufflers Required.
- No Insert or Collector mufflers.
Weight Breaks
- Small Block
  - TRUE 23* headed SBC or 20* SBF 1 KIT - 2800 lbs
  - Inline valve angle 15 to 20 degrees, Single nitrous stage - 2900 lbs
  - Second nitrous stage - 3000 lbs
  - Non conventional style heads, Yates ect. - 3100 lbs (only single nitrous system)
  - 88 mm turbo - 3200 lbs
  - 91 mm turbo - 3400 lbs
  - F1 and 6-71 - 3200 lbs
  - Over 450" will be considered a big block
- Big Block
  - 450-500 3100 (with the 1% a 502 would still be legal)
  - 500-550 3200 (with the 1% a 555 would still be legal)
  - 551-599 3300 (with the 1% a 605 would still be legal)
  - 600-632 3400 (with the 1% a 638 would still be legal)

**TENATIVE -IF ONE DRIVER/CAR WINS 2 RACES IN A SINGLE SEASON, #100 POUNDS WILL BE ADDED FOR THE REST OF THE SEASON**

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EVIL STREET

Revision 9-19-10

TIRES
- 28X10.5 OR 275/60 Radial max tire size. Smaller tires allowed.
ENGINE
- 1 carb – cast intake, or EFI 1 throttle body cast intake only.
- Gasoline only
- Conventional heads only, no canted valve or changed valve angles
- Any ignition allowed, but #50 weight break given to those with non-programmable ignitions
POWER ADDERS
- SINGLE POWER ADDERS ONLY
- Nitrous: Nitrous carb: Single stage plate, 2 solenoids only, 2 entry points only. No diffuser or perimeter style plates. Dual stage plate must have 2nd stage capped off prior to tech inspection and prior to qualifying.
- Nitrous EFI: Single stage plate or single EFI nozzle. 2 solenoids only, 2 entry points only. No dual entry nozzles and no dual entry plates.
- No coke can solenoids, max NOS solenoid orifice .120
- Nitrous Controllers allowed
- Nitrous Jet Limits:
  - SB Nitrous Jet limited to 85
  - BB Nitrous Jet Limited to 78
  - No BB larger than 540ci
- Turbo Small Blocks limited to 76mm inlet size and air/air inner coolers only. No meth injection and no nitrous.
- Supercharged Small Blocks limited to max Procharger F1a, Vortec Ysi, Novi 2000, or smaller, and air/air inner cooler only. No meth injection and no nitrous. No roots style blowers unless factory equipped.
- No turbo or supercharged big blocks
EXHAUST
- Mufflers required, any length, any size.
WEIGHT AND WEIGHT BREAKS
- Power Adder Weights:
  - Nitrous Small Block Conventional Heads 3100 lbs
  - Nitrous Big Block Conventional Heads 3400 lbs
  - Turbo Small Block Conventional Heads 3200 lbs
  - Supercharged Small Block Conventional Heads 3200 lbs
- Naturally Aspirated Weights:
  - Small Block Conventional heads with cast intake 2700 lbs
  - Small Block Non-conventional heads with cast intake 2900 lbs
  - Small Block Non-conv Heads with sheet metal intake 3000 lbs (Slater Rule)
  - Big Block Conventional heads with cast intake 3100 lbs
GENERAL RULES
- Part number must be visible on cylinder heads to prove conventional style.
- NO WHEELIE BARS
- Any Suspension allowed, front must be bolted in stock location.
- Stock firewall must be in place with only minor modification to trans tunnel for clearance.
- Stock looking appearance: all light fixtures must be in place, but do not have to work. Lexan allowed if you cannot see the frame work holding it in (trim covers rivets). No big wings, no big forward facing scoops (stock style ram air scoop allowed similar to trans am or small boss mustang).
- *QUALIFIED CARS "**MUST BE CAPABLE OF**" RUNNING 6.30 OR FASTER FOR EVIL STREET

Back half cars OK, but don’t get mad if everyone bitches that your back half car should be running with the big boys.

Cars must hit the scale and be teched by Evil Street tech prior to first round qualifying. If you win the round and the other driver requests you must hit the scale to prove your weight. Loser not required to scale.

Cars must be driven to the staging lanes, driven from the end of the track back to the pits, and to the scales. Cars must be driven under their own power. No pushing, pulling, or tow/support vehicles allowed. The only time pushing the car is allowed is to advance while in the staging lanes.

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PRO INDEX CLASS

Door Cars Only

No Throttle Stops Allowed in Car

No Delay Boxes Allowed in Car or must be set to zero

No Deep Staging

.400 Pro Tree for All Index Classes

Times Will Be Posted

Two Qualifying Rounds

All Racers Required to Make at Least One Qualifying Pass

There are No Time Trials once qualifying begins

Eliminations are All Run

#1 Qualifier to Receive Bye Run if Odd # of Cars in 1st Round

If Double Breakout - Car Breaking Out the Least Wins

No street tires

Red light, cross center line or contact wall loses

Competitors will be paired up with lane assignments by card draw

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