Thread: Question on rules for 10.5 class

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Extreme Street 10.5



Chassis



1. Stock Front frame rails (must be in stock location)

2. Aftermarket control arms and bushings allowed as long

as they bolt in stock locations

3. Rack and Pinion steering allowed

4. 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

5. Aftermarket Coil shocks allowed

6. ALL replacement parts must be in stock location

7. K-Members allowed (late model Mustangs, Camaros and

Firebirds)

8. K-Members must feature stock attachment locations

9. No part of the K-Member may be permanently attached

to the chassis

10. Rear Frame rails must be in original stock location (minor

notching allowed for tire clearance)

11. Mini Tubs allowed

12. Any rear suspension allowed, 4-links, ladder bars, etc.

13. Motor Plate and Mid Plate allowed

14. Motor must be in stock location

15. No traction compound spraying devices allowed.

16. Max 82 MM turbo. Air to liquid intercooler allowed. Measurement will be a

1/16th of an inch away from the compressor wheel. If it measures more that

82 MM or if the leading edge is more than a 1/16th away from the

compressor wheel then the turbo is illegal.

17. Maximum supercharger F2 and D3 air to air.







Body

1. Firewall must be in stock location, minor modifications for trans,

etc is OK.

2. Unaltered floor pan. May be altered for thru the floor sub-frame connectors, etc.

3. No body alterations (must have front and rear bumpers)

4. Headlights and taillights must be in working condition

5. Fiberglass limited to Hood, Bumpers, Deck Lid, front

fenders or doors, limited to doors or fenders, not both. No one piece

fiberglass front ends.

6. Forward facing hood scoops not allowed.

7. Drilling/cutting holes in hood for air inlet prohibited

8. No Pro Mod style wings

9. Max Wing 15" from leading edge

10. Lexan allowed





Interior

1. Two Front seats, turbo/supercharger cars may remove passenger seat for plumbing.

2. Driver Seat must be mounted in front of Door Jamb

3. Carpeted interior

4. Door panels (aluminum door panels allowed)

5. Stock Dash (aftermarket gauges allowed)





Tires

1. 10.9 Tread width only, NO W's. Hoosier part # 18192D05 will not be allowed.

2. 12.5 sidewall designation DOT Tires max





Power Adders

1. Only ONE type power adder allowed

2. Timers and controllers are allowed.

3. Progressive nitrous controllers and data recorders allowed.

4. Only one fogger or Dual stage plate allowed - If a second fogger system is on car it must

be capped off at the n2o solenoids. Only 2 nitrous solenoids and 2 fuel solenoids

allowed to be uncapped. If more that 2 nitrous solenoids are on the car they must

be capped off. NO EXCEPTIONS. Dual stage, single nozzle foggers are not

allowed.





Transmission

1. Automatic or factory equipped manual

2. NO Brunos, Lencos etc





Engines





1. NO Sheet metal Intakes

2. Must use mass produced cast aluminum intakes (no tunnel rams)

3. Single Carburetors only

4. EFI max 90 MM throttle body. 1250 CFM max

5. V6 Turbo may use air to liquid intercooler

6. F2, D3R blowers allowed air to air intercoolers only. F1’s or smaller can have liquid intercoolers

7. Max 6-71 Blower allowed

8. All cars must run gasoline (no alcohol or methanol)

9. Dry Sumps Not allowed





Heads



1. Billet or custom fabricated heads prohibited.

2. 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,& valve spacing.(no substituting canted valve for inline head, etc.)

3. Big Block cylinder heads must retain 24* style port/valve
configurations.No BBC 18* heads allowed.

4. Minimum valve angle for small blocks is 15 degrees.

5. No Big Chief, Big chief style or SB2 heads.

6. Porting allowed.

7. If you are not sure if a particular head is allowed, contact TTT5 for clarification

8. Yates heads are allowed with a mass produced cast intake (nitrous cars only), must weigh 3200 lbs.









Exhaust

1. Mufflers Required

2. No Insert or Collector mufflers





Weight Breaks

1. 3200 lbs. Base weight

2. 200 lb deduction for all n2o small block heads except Yates style heads.

3. Big Block nitrous cars 3200 lbs

4. 300 lb addition to aftermarket big block tall deck chevy and aftermarket Ford big blocks.

5. Yates heads allowed on n2o cars at 3200 base weight with cast type intake only.

6. Blower and turbo cars add 100 lbs.

Double Frame Rail does indeed refer to a tube chassis race car. More specifically when one speaks of double frame rail it refers to the pipe running down the middle of the car (either side of the driveshaft, main frame rails) and a double frame rail cars has sets of rails one on top of each other spaced 6"-8" apart. Oh yeah, everyone has their own opinion, but bracket racing isn't boring if you're good at it. Unless you call running for $10,000+ and racing decided by .000-.010 boring. Hope this answers your question.