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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 |
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Maximum cubic inches for all turbo and centrifugal
supercharged combinations - 560 CI
Maximum cubic inches for all roots supercharged
combinations - 530 CI |
|
Weight Adders:
Clutch-equipped
transmissions add 100 lbs unless NOS small block or N/A Combo
Turbo alcohol combos add 50 lbs
Any turbo 101 to 106 add 50 lbs
Any turbo above 106 add 100 lbs
Not having fun add 50 lbs
No pro stock car 2000 and newer
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 OSCA 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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