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Super Street 10.5-Single power adder class for nitrous, blowers and turbos (rev. 1.1)

Body and chassis:
-Fabricated front frame permitted. Subject to 50# weight adder and vehicle must carry 55% of  vehicle base weight on front tires (53% if firewall has not been modified to facilitate large amounts of engine setback and vehicles with fabricated front frame are not eligible for any  weight breaks).
-Lexan/plexiglass window replacements permitted.
-Functional headlights and tail lights are required and must be in stock location. If vehicle is equipped with factory recessed headlights, fog lights in bumper or grill are allowed.    
-Light weight body panels allowed.
-Any type hood scoop allowed.
-Rear wing permitted. No molding of spill plates to quarters.
-Body must appear stock. Body modifications must receive prior approval from OSCA tech  official
-Must retain stock wheelbase with a maximum variation from front to back of 2 inches.

Exhaust:
-Mufflers required. NO insert style mufflers allowed.

Tires:
-Maximum rear tire size 33x10.5W as designated.
-Maximum tire tread width, regardless of temperature or wear, not to exceed 11.5” Maximum roll out (blower and turbo combos only) of 105”, regardless of temperature or wear, as measured with vehicle off of the ground at 8 lbs of air pressure. Manufacturer, model and size information must be clearly designated
-Entries using 31x10.5W or smaller tire receive 100# weight break
-Maximum inlet diameter for twin turbo entries 88mm each.
-Pre/inter/after coolers of any sort prohibited on alcohol burning entries.

Vehicle will never race under the minimum weight regardless of weight breaks.

Transmission:
-Any type transmission permitted

Safety:
-Engine Diaper Mandatory. Non SFI units OK.
-Fire System Mandatory                  
-HANS device mandatory

Fuel:
-Gasoline or alcohol only

Base Weights:

POWER ADDER

Engine Base CI

Weight

Naturally Aspirated

SB/BB

up to 650

2,400

Naturally Aspirated

SB/BB

650 to 740

2,500

Naturally Aspirated

SB/BB

740 to 830

2,600

Nitrous

SB

525

2,400

Nitrous

BB

500 up

2,500

Nitrous

BB

550 up

2,550

Nitrous

BB

600 up

2,600

Nitrous

BB

650 up

2,650

Nitrous

BB

700 up

2,750

Nitrous

BB

740 up

2,800

Nitrous

BB

800 up

2,900

Nitrous

BB

up to 850

3,000

Single Turbo/cent blower or 10/71

all

400 up

2,800

Single Turbo/cent blower or 10/71

all

500 up

2,900

Twin Turbo (88)

all

up to 450

3,075

Twin Turbo (88)

all

450 to 560

3,150

Roots Supercharged

all

up to 500

3,100

Roots Supercharged

all

500 to 530

3,150

Maximum cubic inches for all turbo and cent. supercharged combinations - 560 CI
Maximum cubic inches for all roots supercharged combinations - 530 CI

Weight Adders:
Clutch-equipped transmissions add 100 lbs unless SB or N/A Combo
Turbo alcohol combos add 50 lbs
Any turbo 106 to 114 add 50 lbs
Twin Turbo (91) add 50 lbs
Not having fun add 50 lbs
2000 and above pro stock car add 100 lbs

Race Format:
-.400 Pro tree start with a professional ladder

If you are building a race car and you are unclear about rules concerning your class, please contact us.

The CSCN reserves the right to impose penalties for rule infractions and on items which do not represent the intent of the class entered.

Rules subject to change without notice. If in doubt as to rule interpretation please contact us for final ruling.

 

 

 

 

 

 

 

 

 

 

 

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