Ultimate Street is a heads up class designed for
any passenger vehicle from any major manufacturer.
Fiberglass/Carbon body panels are allowed. No one piece front
ends. Cowl hoods may not be taller than half way point of the
windshield. OPEN Forward facing scoops are prohibited.
Racers may have forward scoop if completely sealed/plugged.
Aftermarket steering columns are allowed.
all entries must have operational head lights and tail lights.
SMALL BLOCKS ONLY
Aftermarket blocks and cylinder heads are allowed. Entries may
utilize a single carburetor or single throttle body (4150, 4500
mounted) Motor plates and solid mounts are allowed. Engine must be
in stock location. Mufflers are required on all vehicles except
turbo entries. Entries must utilize a single stage nitrous plate
with one nitrous, one fuel and one redundant purge solenoid.
Foggers must be disconnected and all solenoids must be capped off.
Nitrous plates using fogger nozzles are not allowed. All engines
are limited to 470 cubic inches EXCEPT B.O.P. Any engine in
question will be measured with a P&G gauge. A correction factor of
1.5% will be used. Competitors may be asked to remove a cylinder
head for bore and stroke measurements should any discrepancies
Nitrous - Progressive nitrous controllers are allowed.
SUPERCHARGERS AND TURBO ENTRIES MUST BE STOCK VALVE ANGLE ENGINES
ONLY. NO ENTRY MAY HAVE ANY DEVICE TO DIRECT AIR INTO TURBO OR
SUPERCHARGER PERIOD. NO CUTTING OF ANY HOLES ON FRONT END. STOCK
FRONT ENDS WITH GRILLS/SLOTS ETC. ARE ALLOWED
Turbocharged (mid frame turbo only see list below) and
supercharged (must be unmodified from manufacturer) entries are
limited to stock valve angle SB combos only. (SB CHEVY 23 DEGREE -
SB FORD 20 DEGREE – 18 DEGREE MOPAR - FACTORY HEADED SMALL BLOCK
FORD MOD MOTOR - LS CHEVY 15 DEGREE)
** NOTE: SB Chevy 23 degree Raised Runner – SB Ford 20 degree
(SR20 –FT1 or T1RI or equivalent) not permitted with boosted combo
ALL SUPER CHARGERS AND TURBOS MUST BE ORIGINAL FROM FACTORY AND
TRUE SIZE and not altered.
NO REDUCERS OR BILLET WHEELS
SB CHEVY STANDARD 23 DEGREE(NO RAISED RUNNER)
SB FORD 20 DEGREE(NO SR20-FT1 OR T1RI OR EQUIVALENT)
FACTORY HEADED SMALL BLOCK FORD MOD MOTOR
- 50 # FOR ANY SUPERCHARGED ENTRY THAT IS BELT DRIVEN
- 50 # FOR NON INTERCOOLED
F1C - 3200 #
YSI - 3200 #
*******T-76 3150 # NO REDUCERS
No Billet wheels on 80mm turbo combo (add 50lbs for 76 w/billet
*******T-80 (47 based turbos only 3250 # NO REDUCERS
N/A Inline head – 2550 on M/T TIRE PART # 3754R ONLY
N/A Non-Inline head – 2650 on M/T TIRE PART # 3754R ONLY
N/A (big block with standard deck height and conventional head)
2850 lbs on M/T TIRE PART # 3754R ONLY
N/A (big block with tall deck height and conventional head)
2900lbs on M/T TIRE PART # 3754R ONLY
N/A (big block with standard height and big chief head) 2950lbs on
M/T TIRE PART # 3754R ONLY
N/A (big block with tall deck height and big chief head) 3000lbs
over 589 add 100lbs on M/T TIRE PART # 3754R ONLY
4 cycl. or 6 cyl. only - may direct air :
add 50 lbs.
ALL COMBOS MUST RUN ON 3754R TIRES ONLY
Any OEM style automatic or OEM manual transmission is allowed.
Manual transmissions must utilize an SFI approved bell housing.
Stock type rear suspension only. Coil over shocks are allowed.
Aftermarket replacement control arms are allowed.
BOLT IN SUSPENSION ALLOWED
M/T TIRE PART # 3754R ONLY
N/A SB 2700 lbs
Base weight - 3200 lbs
Any canted valve head - 3250 lbs
STANDARD 23 degree combo - 3050 lbs
Any 23 RAISED RUNNER- 3150 lbs
BLUE THUNDER HEADS - 4.3 -3250 lbs
STANDARD 20 degree ford - 3100 lbs
ANY 20 DEGREE SR20-FT1 OR T1RI OR EQUIVALENT -3150 lbs
C3 OLD STYLE YATES,C302,C302B - 3100
******Mopar BB conventional B1 head/BOP combo - 3350Nitrous
limited to SB and BOP/Mopar BB entries
Progressive nitrous controllers are allowed. Entries must utilize
a single stage nitrous plate with one nitrous, one fuel and one
redundant purge solenoid. Cross bar plate on BB Mopar (BOP
permitted #6 from bottle to solenoid) entry limited to #4 single
line from #4 bottle nut to #4 fitting @ solenoid. BB Mopar/BOP
entry permitted single stage, single bar plate with #6 single
lines from bottle to solenoid. Foggers must be disconnected and
all solenoids must be capped off. Nitrous plates using fogger
nozzles are not allowed.
*******+ 75 LBS FOR ANY COMBO OVER 440 CU IN WITH A MAX OF
*******470 EXCEPT B.O.P.
NO BILLET CYLINDER HEADS
*******Leaf springs -50#
Alcohol/E85 legal (meth injection legal on non-intercooled combo
- All turbochargers (mid frame GT47 or S400 chassis only) must be
as manufactured from factory (GT47-76/S400/GT47-80/S480 w/cast
wheel - GT47/S400-76 w/billet wheel)
- Cast compressor inducer cannot exceed 80.7 mm and the compressor
exducer cannot exceed 116 mm
- 80.7/76.5 mm compressor wheels must be "as-cast" (billet
permitted on 76 mm with weight penalty)
- Turbine wheel must not exceed 96.2 mm x 88.3 mm
- All turbochargers will have the compressor cover removed for
- No muffler required on turbo entry, required on all other combos
- No bull horns - front exit exhaust permitted but must not effect
- Boosted LS 15* add 50 lbs
- 8.2 deck nitrous combo deduct 100 lbs.V-6 -200 #
4150 CARB – 50LBS
Ladder Bars Add 25#