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Pure Stock 2020

2020 Pure Stock

Pure Stock 2020

Rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern all events, and by participating in these events, all participants are deemed to have complied with these rules. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM PUBLICATIONS OF OR COMPLIANCE WITH THESE RULES and REGULATIONS. They are a guide and are in no way a guarantee against injury or death to a participant, spectator, or official. Harris Speedway retains the right to make all decisions and reserves the right to make any rule changes/amendments with dispute or appeal.

ALL VEHICLES, COMPETITORS, AND TEAMS SUBJECT TO 2020 HARRIS GENERAL RULES AVAILABLE AT THIS LINK: http://harrisspeedway.com/hms/rules.asp?TOPIC_ID=%2011350

GENERAL -
STOCK UNLESS OTHER WISE STATED
tech man has right to check this every week
· No nitrous or traction control
· may run engine fan, no electric fan
· may run air breather, aftermarket ok. Cannot protrude though hood. No air box
· Ford solenoid, radiator, and fan shroud can be made from aluminum
· All 14" or 15" rims. Battle bands allowed on Stock wheels only. Mud covers are allowed on any wheels.
· 7" racing wheels legal - must have 3" OR 4" backspacing but all wheels must be the same - no spacers - may run beadlocks on right side
· No dot racing tires
· tires - any 70, 75, or 78 series street legal D.O.T. Tires - doesn't have to be same size
· no truck, mud grips, high performance, directional, special order, snow, trick gumball, fancy, or exotic tires of any kind
· large 1" lugnuts are ok
· battery may be moved to inside driver’s compartment but must be enclosed and securely mounted
· All vehicles must have seamless tubing 4-point roll cage with X braced hoop behind driver and a minimum of three door bars with vertical bracing from top to bottom. Where bars connect to frame must be a minimum 1/4-inch steel plate welded to frame in a secure and safe manner. Main components of 4-point cage and driver's door bars must be at minimum 1.5”x.095” tubing.
· may run bars to radiator but may not protrude through radiator support
· may run bars to back but no bumper bars protruding outside
· fuel cell mandatory with 22 gallon max - hole in trunk may have 3" clearance cut around cell
· must have steel firewall where back seat was
· no lead or any weight may be added to car
· exhaust must be stock cast iron. No center dump manifolds. No x pipes or h pipes. Factory y ok
· aluminum radiator ok
· fuel cell must be mounted inside of trunk with firewall between driver and fuel cell
· cars must have number on sides and top and able to be read by score tower
· stock unless otherwise stated
· stock brakes

BODY - visual protest only
· stock unless otherwise stated
· 1968 or newer American made car
· complete stock body must be retained. Can cut 2" below factory crease
to replace body panels
· may use steel 2" below factory crease for quarter panels but must look
stock and 20 gage steel
· may use steel doors but must look stock and I do mean stock 20 gauge steel
· may run rubber nose - top and bottom OK
· no cutting, chopping, channeling, shortening
· hood hinges may be removed
· all chrome, plastic and glass must be removed
· steering column must remain stock but may use quick release steering wheel
· may use hood pins to hold hood down
· all firewall holes must be covered
· must have stock firewall in original location
· may replace dash with sheet metal
- throttle rod and racing gas pedal may be used

WHEELBASE / FRAME
· stock only

ENGINE - BOTTOM END
· engine must be strictly stock for that make and model and in original mounts NO MORE THAN 358 cubic inch
· repaired engine parts must be approved
stock type oil pans only, no baffles
· 1-piece rear seal block ok
· no high-performance engines or special order parts
· .060 over bore max.
· stock blocks only
· must be stock replacement low compression piston
· no flat top 4 eyebrow piston - must be dished
- no cutting tops of pistons
· speedpro H423 NCP replacement piston ok
· pistons must be at least .009" in block
· no bottoming of lifters
· stock crankshaft
· no knife edging or lightening, etc
· cast crank must weigh 48 lbs.
· no stroking or de-stroking
· no balancing
· journals may be turned no more than .060"
· rod width may not be less than .940
· stock timing chain gear set only no offset keyways
- no offset woodruff keyways
· balancer 6 3/4 by 1" no machining
- no powder rods in any engine

HEADS
· heads for make and model
· heads can't vary more than 4cc's from stock
· no angle milling
· stock size of valve for make and model
- no under-cut or cutting of valves
· valve springs can be z28 springs
· shims can be used under valve springs with a limit of .60 per spring
· may use off set locks but not with shims
- any stock steel replacement retainers or equivalent or heavier than stock
· rocker arms must be stock, no long slotted rockers
· no porting or polishing
· steel valves only
· stock stem diameter
· cannot run 993 or 441 heads
· no cutting under 45- no competition valve job - no 3 angle valve jobs allowed


INTAKES
· stock cast iron
· no Holley pattern factory intakes
· aluminum intakes on factory original cars must remain unpainted
· Can block off exhaust gas crossover
CARBURETOR
· must be a stock 2 or 4 barrel only
· no modifications except choke flap removal
· no removal of choke horn
· No spacer of any kind 1/4 inch gasket only

CAM
· stock timing chain only
· or Cloyes C-3023X adjustable timing chain ok
· .390 - .410 lift
· 112 lobe separation +/- 1 degree
· advancing or retarding the cam in car with adjustable timing ok
· Cloyes C-3023X only - no cam buttons
· stock cam or stock replacement cam only
· duration for intake + a 2 degrees variance
· .006 - 256 degrees
· .050 - 195 degrees
· .200 - 95 degrees
· duration for exhaust + a 2 degrees variance
· .006 - 261 degrees
· .050 - 202 degrees
· .200 - 106 degrees
· must have 18" vacuum at 1000 rpm
· hydraulic cam and lifters only
· Cams CS-274 Sealed Power and CCS-2 Melling are a stock
produced cam and will be looked at with a little more
variance. All custom ground cams will be required to meet the
above specifications.

TRANSMISSIONS
· automatic transmission torque converter stock type and 11" minimum
· may have a cooler mounted in the driver’s compartment
· automatic transmission only - no power glide
· may run an aftermarket shifter.

DRIVE SHAFT
· has to be stock for model of car
· no carbon fiber
· a "U" or square type safety loop on front of drive shaft assembly is
required

IGNITION
· stock type ignition
· stock type distributor only
· no high performance distributors or high performance parts
· no altering firing order

REAR ENDS
. NO SWAY BARS ON REAR END
· must be stock for make and model
· no gear lower than 3.73
· may weld spider gears
· positraction rear ok
· shocks must be in stock location
· no lightening of any parts
· all components must be made of steel

SUSPENSION
. NO SWAY BARS ON REAR END
· Shocks must be O.E. or O.E. replacement type only, no improved performance shock of any type including but not limited to Bilstein, QA1, etc. No modifications to shocks whatsoever including painting. Shocks must have visible manufacturer part number or identifying manufacturer mark.
· 10" maximum arch height on rear springs
· 1/2" tolerance on front springs on stock height

PROTEST AND CLAIM RULE
· Bottom end protest $600, acceptance fee $200, track retains $200. Pick one of the following:
1) remove crank weigh and inspect crank and journal, visual rod and piston from bottom not removing. crank will be weighed with gear and pilot bushing
2) remove 1 rod and piston from engine. visual crank and journals in place
· protest any 3 items - $300
- acceptance fee - $100
- protest cam $300
· acceptance fee - $100
· track retains $100
· claimer rule on transmission - $400 - may buy torque converter for
additional $100
· Can use transmission for one of the three protested items but it is a visual
inspection only to check for type, will not be removed from car
· Can protest head for one of the three protested items, but can buy both
heads for $500 and intake $100
-Shock buy rule $50 per corner
· Tech man has final say
Posted by Wayne Clayton

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This web site was created for Travelers Rest Speedway by Wayne Clayton. All materials, both visual and written, are property of Travelers Rest Speedway and Wayne Clayton. Duplication, replication, or other un-authorized use of this web site, or materials within are strictly prohibited. Where applicable, violations will be prosecuted to the fullest extent possible under law.