WILMOTNONWINGSPRINTRULES2017
ENGINES
Option1.:RecommendedengineisaGMsealed19318604or88958604cratemotor.Enginecannotbe
modifiedandthemaximumHPis450.EnginewillhaveamaximumRPMof6700.Enginesmayhave
camdrilledforreardrives.Maximum13/8"carbspacer,including3/8linkageclearingadapter.Below
isalistofpartnumbers.ThesepartnumberswereprovidedcourtesyofLaneAutomotive/MotorState
Dist.(theyarealsoaWilmottracksponsor)andareeverythingneededtoputthisapplicationintoa
sprintcar.
SCH1052LVCM-3SchoenfeldHeaders(thisisonlyheaderthatfitsthe604)
QFTQ-750-CTAQuickFuel750cfmalcoholcarborQuickFuelIRA650carb
JRP1004-S-CEJonesSerpentineDriveKit
SWE305-80830SWEETpowersteeringpump
ALL31105AllStarwaterpump
ALL81200AllStarGMHEIDistributorw/cap
ALL27503AllStardistholddown
FEL1900FelProHolleycarbgasket
FEL1901FelProcarbplategasket
ARP200-2402carbstudkit
NGKR5724-8sparkplugs(race)
Anysteelharmonicbalancer
BER372-NC-EXTBertExternalDriveKit
WIN65856Wintersyoke-flange-short
ALL26156AllStarfuellinekit
Techprocedures,whetherpreviouslysealedengineornot,wewillbedoingvisualinspectionsonthe
604andteamswillberequestedtoremovevalvecovers.Failuretodosouponrequestisautomatic
disqualification.Itemswe'llbelookingforaspartofourvisualare;
-MustbeGM604block,head,andintakecastings#10243880,#12367712,#12486574.
-ExternalBalanceCrankshaft,musthavetheboltonweightoncrankshaftadapter.Mustbeexternally
balanced604crank.(NoStrokers).
-OEMor604replacement4-ValveReliefFlatTopPiston.(NoDomes),canbe.020or.030overboreas
604replacementpistonsareavailableforthose.355cubicinchmaximum.
-Stockrockerarms,1.5ratio,selfalligning...noguideplatesallowed.
-Stockliftcamshaft,willchecklifts;intake.475,lobelift.316.Exhaust.510lobelift.340
-OEMhydraulicrollerlifters(Nolinkbarlifters).
-ValveSprings;1.BeehiveMaxOD1.2852.SingleSpringMaxOD1.270
-Musthaveaworkingrevlimiter.Wereservetherighttosupplytherevlimiterifcompetitor'sappears
tobequestionable.RevLimiterneedstobemountedonenginesideofthefirewall(Notinthecockpit).
-Wereservetherighttoimpoundrevlimiters,tachs,wiring,etcforfurtherinspection.
Option2.:WilmotSpecEngine(buildyourengine).Thisenginewillbechippedat6800RPM'sandthe
maximumHPis450.STRONGLYsuggestedtohaveenginedynotestedPRIORtocompetition.
Block:
A)AnyChevrolet305,307,327,or350CIstockironblockthatwasavailableinapassengercarortruck.
Maxoverbore-.060”
B)Nointerchangeofcrankshaftsorrodstoblocksallowed.
C)Absolutelynolighteningofanykind.Allmountsmustremain,fuelpump,motoretc.
D)Factory2or4boltmainblocksONLY(canNOTaltera2boltblocktoa4boltblock).Nospladecaps.
Crankshaft:
A)AnystockGMproductioncrankshaftallowed.ThefollowingScat9000Seriescrankshaftsareallowed:
Chevrolet350-Scat(Part#9-10442)
B)Strokemustmatchblock.
C)Nolighteningorpolishingallowed.Balancingallowed.
D)Crankshaftflangemaybemachinedtofitrearmotorplateandtorqueballhousing.
Rods:
A)Anystocksteelproductionrod,ScatOEMreplacementI-Beamrod#35700orEagleOEMI-Beamrod
#5700BBLWallowed.
B)Rodlengthmustmatchblock.Chevy5.7”lengthpowderedmetalrodsallowed.
C)Nogrindingorpolishingallowed.Balancingallowed.
D)NocapscrewsallowedexceptonEaglerod#5700BBLW,Max3/8”bolts.
Pistons:
A)Anyforgedalluminumpistonallowed.
B)Enginesmustnotexceed9.5to1compressionratio.
Camshaft:
A)Hydrauliccamandliftersonly.
B)Liftersmustcollapse.100”min.
C)Onlyliftersofenginemakecanbeused
D)Liftersmustrotatefreelyandbeofmagneticmaterial.
E)Timingchainonly,nobeltdrivenorgeardrivesallowed.
F)Cammaybedrilledforrearspud.
CylinderHeads:
A)Stockcastironproductioncylinderheadsonly.Noaftermarketheadsallowed.ExceptGMEQheads.
B)Chevrolet1987-1995Swirlportheadsareallowed.
C)NoVortex,Bowtie,SVO,W-2,Magnum,GenII,orangleplugheadsallowed.
D)ThefollowingChevroletcastingnumbersarenotallowed.040,041,186,187,291,370,414,432,461,
461X,462,492,1012532,10208890,10239906,12554290,14011083,or14096217.
E)Portingorpolishingofanykindisnotallowed
F)Noanglemilling,onlystandardreconditioningallowed
G)Carbidecutterreliefcutsallowedbelowthevalveseatbutnottoexceedmorethan¼inchbelowthe
topofthevalveseat.
H)Valvespringdiametercanonlybestockproduction.
I)Steelstocktypestampedrockerarms,rollerorrollertippedrockerarmsareallowed.
J)Studgirdlesarenotallowed.
IntakeManifolds:
A)Allenginesmustusethefollowingintakemanifoldpartnumbers.
Edelbrock(Part#2701)
Weiand(Part#7546,7467,or7547-1).
B)HVHSS4150-1ALW1″alumlightweightsupersuckercarbspacer
C)Porting,polishing,gasketmatchingofanykindisnotallowed.
D)Bottomofcarburetormaybenomorethan1-3/8inchesfromtopofmanifold.
OilingSystem:
A)Wetsumponly,oilpumpmustbeinoilpan.
B)Paninspectionplugisrequired,locatedsocrankshaft&rodsarevisiblewithborescope.1”pipe
or#12ANsizeonplug.Removingthepanmayberequirediffurtherinspectionisnecessary.
Exhaust:
A)Headertube:1¾inchmaximumoutsidediameterontheprimarytubes,+or-.030.
B)Onecollectorperside.
WaterPump&Radiator:
A)Anystocktypewaterpumpallowed.
B)Radiatormustbeinfrontofengine.
Option3.:For2015Only
Therearefournon604orbuildyourownenginesthatwereallowedtoraceinthisclassin2015.These
engineshavebeengrandfatheredintotheclass.TheseenginesmustrunaquickfuelQ-500-CTA2barrel
carb.Alloftheseengineswillberunonthedynoandsealedpriortocompetition.Ifsealsareremoved
foranyreasonenginemustreturntodynoandbetestedandresealed.Ifanyofthesefourengineshave
amajorenginefailure,theywillnotbeallowedtoberepairedandreturntocompetitioninthisclass.
EngineProtest:
Engineprotestfeeis$450andmustbepaidtodesignatedracedirectornomorethan15minutesafter
thecompletionoffeature.Ifanengineisprotested,themoneywonbythatcarthatnightwillbeheld
untiltestresultsarecompleted.Ifengineisfoundlegal,theprotesterforfeitshis$450protestfee,and
theengineownerthenreceiveshiswinnings(whichwerebeinghelduntildynoresults),plus$100for
inconvenience.Ifengineisfoundillegal,theprotestfeeisreturnedtoprotester,andwinningsfrom
illegal(engine)carfromthatnightwillforfeitwinningswhichwillbeusedtopaydynofee.Theillegal
enginewillbemarked&taggedillegalandnotallowedtocompeteuntilrepaired,retestedand
approved.
AllenginedynotestingwillbeperformedbyAntiochAutomotiveMachine/TARacing,locatedat:40854
NRt.83,Antioch,IL60002,phone:847-395-9820.
GeneralRulesforALLCars:
Carburetor:
A)Aminimumoftwo(2)returnspringsmustbeconnectedtothrottle.
B)Musthavetoestraponthrottlepedal.
C)QuickfuelIRAcarbQ-650-CTAorQ-750-CTAalcoholcarb.
D)13/8”maxcarbspacerincludingthelinkageadapter.
FuelPump:
A)Amechanical,beltdriven,orcamdrivenfuelpumpisallowed.Camdrivenrecommended.
B)NoElectricfuelpumpsallowed.
IgnitionSystem:
A)GMHEItypedistributor.MSDdist#8365isallowed
B)Internalcoilvertexmagneto.
C)Noelectronicmonitoringdevicescapableofstoringortransmittinginformationexcepttach.
D)Noelectronictractioncontroldevices.
E)NoMSDtypeMagsallowed.
F)MandatoryMSDsofttouchboxP/N8728orP/N8727CT.
Fuel:Methanol(orEthanol)basedfuelonly.Noperformanceenhancingadditives
allowed.Fuelcanbecheckedatanytime.FuelBladdersaremandatory.Nocarbonfiber
orcompositematerialshellsallowed.Wilmotreservestherighttosendsamplesoutformore
comprehensivetestingifdeemednecessary.Ifillegal,penaltywillresultindisqualificationandforfeiture
ofpointsandmoneyearned.
Tires:Hoosier4cornerrule,16"H15,H20,orMedRR,and15"H12,H15SC-98andSC-100LR.Nopreps
orsofteners.CarswillnotbeallowedtoracewithflatLR,RR,RF.(orLFifoffthebead).
Wheels:Aluminumorsteelonly.Maxwidthis18"RR,15"LR.
WheelCovers:BeginningJuly1,2017wheelcoverswithonly3attachmentpoints,mustbeboltedatall
3pointsutilizing5/16flangedsteelboltandapprovedfasteningsystem.Wheelscoversutilizinga
minimumof5attachmentpointsmaycontinuetousedzusfasteners,thoughdzusfastenersmustbe
steelonly.AoneweekendgraceperiodwillbeprovidedtofirsttimeparticipantsafterJuly1.
Cars:Mustresembletraditionalsprintcardesign.Anythingdifferent(includingbodypanels,bumpers,
nerfs,etc)mustmeetpre-approvalfromWilmotofficialspriortocompetition,orriskdisqualification.
AnycardeemedunsafebyWilmotofficialswillbedeniedcompetitionatanytime,includingattempting
tore-enterthetrackfromtheworkarea.
Chassis:Rollcagemustbeof4postdesign.Wheelbasenolessthan83"andnomorethan90".Noless
than39"setbackonmotor.Noellipticaltubingusedonoraspartofmainstructure.Thefollowing
measurementsareminimumsuggestedmaterial:4130normalized.TopRails:1½x.095,BottomRails:1
3/8x.095or1½x.083.RollCageUprights:13/8x.083,RollCageTopCrossMember:1½x.095.
UpperRails:13/8x.083,RearEndSafetyBar(mandatory):1x.083or1¼x.065Brace.
WeightRules:Carsmustweighaminimumof1500lbs,includingthedriver.Carscanbeweighedatany
time.Ifacarfailstomeetthatrequirementitwillbeconsideredlastinthatspecificeventwithno
furtherpenalty.Acarcancrossthescalesnomorethantwicetodetermineweight,unlessrequestedby
WilmotOfficial.Anyboltonweightorballastmustbepaintedwhitewithcarnumberdisplayedonit.
Boltonweightmustbesecurelyfastened(tothesatisfactionofWilmotOfficials)betweenthebottom
framerailsandaxlesbutmountednohigherthantheupperrails.
Brakes:Allcarsmustbeequippedwiththeminimumof2brakes,onefrontandonerear.Onlysteel,
aluminum,titanium,orcarbonfiberbrakerotorsallowed.Carsknowinglywithoutworkingbrakeswill
notbeallowedtorace,orresumeracing.
Shocks:Nocockpitadjustableshocks.
Mufflers:WilmotwinglessclassdoesnotrequireMufflers,ifteamschoosetorunmufflerstheymust
useshoenfeldadaptor3530&muffler14272735-78or112535.Mufflersneedtobewelded,thru
bolted,orattachedbyapprovedclampsystem(King).Lossofmufflerwillresultinablackflagor
disqualification(tolastplace)forthatevent.
FrontAxle:Steelonly.Minimumsizes2"x.156,2¼x.120,23/8x.095.Note,frontaxletethersystems
notrequiredbutarestronglysuggested.
DragLink:Draglinksmustbetetheredtotheframe.Capturedsteelheimendsanda1"diametersteel
constructionwith.058sidewallsaresuggestedfordraglinksandtierods.
RearEnds:Traditionaltypesprintcarquickchangerearendwith10"ringgearrequired
Drivelines:Drivelinesmustbecompletelyenclosedandmustutilizeatorquetubeand/orstrap
restraint.Carbonfibertorquetubesarelegal.WilmotSTRONGLYurgestheuseofadriveline
containmentsystem.Drivelineu-jointscattershields,steeltorqueballhousingsminimum.120thick
and/ortorqueballu-jointcontainmentblanketsareagainSTRONGLYencouragedandsuggested.
FloorPan:Steeloraluminumonly.Wedgesand/orfoilsunderneaththeracecarwillnotbepermitted.
TorsionBar:Nocockpitadjustability.Stop&armlocksarerequiredonfront.
Bumpers&Nerfs:Allrearbumpersmustbesteel,minimum1"diameterandminimum.065thick.The
frontbumpermustnotextendmorethan8"fromtheframeand/orthemeasurementfromthecenter
ofthefrontaxletothefrontbumpermustnotexceed23½”.NOTE,anythingdesignedbeyond“chassis
mfgnormal”mustbepre-approvedpriortocompetition.
BodySidePanel:Rightsidepanelmusthaveaminimumopeningof10"x21".Maximumdistancefrom
theframeis7".Radiusrodprotectorsarepermitted,themaximumprotectorverticalopeningwillbe
10"inheightby24"longanditmustNOTextendmorethan3½”fromtheoutsideedgeofthebottom
framerails.A11/2"wideby20"longexhaustfumedeflector,locatedonthebottomside-bodypanelat
therearedgewillbepermitted.Theturnoutanglemustnotexceed90degrees.Elbowroomalterations
mustbelimitedtotheareabetweentherollcageandnotbedesignedtotrapordeflectairinorderto
gainacompetitiveadvantage.Allothersidepanelingmustbefabricatedflatandmustnotextendpast
theoutsideedgeoftheframerailsmorethanthethicknessofthepanelingmaterial.Wesuggestany
panel,hood,radiusrodprotectors,fumedeflectors,etc.beyondthenormalappearancebepreapprovedbyWilmotOfficials.Carnumberneedstobedisplayedontriangularsidepanelsandnose
pieceinadditiontotailtank
Seats:FIAand/orSFIratingSTRONGLYRECOMMENDED.Seatmountingtobedonepermanufacturer’s
recommendations.AllseatsareSTRONGLYSUGGESTEDtomeetSFI39.2specifications.Thedriver’sleft
sideheadrestmustextendatleast4"forwardfromthebackoftheheadrest(wherethehelmetcontacts
thebackoftheheadrest).Allareassurroundingtheheadshouldhavepadding.Aapproveddriver’s
cockpitnet,STRONGLYRECOMMENDEDfortheleftsideifthehelmetheadrest/helmetsurroundisless
than7"forwardfromthebackoftheseat.Thenetshouldbeaminimumof3ribbonsandmeetSFI37.1
specifications,installedperthemanufacturer’sspecifications.
Head&NeckRestraintSystems:STRONGLYSUGGESTED.DevicesshouldmeetSFI3.3specs,andbe
installedpermanufacturer’sinstructions.
SeatBelts:EachcarwillbeequippedwithaminimumofanSFI16.5orSFI16.1approvedrestraint
system,andbewithinthe2yearexpirationdatefrommanufacturer.Seatbeltrestraintsystemsshallbe
installedandusedinaccordancewithmanufacturer’sinstructions.Seatbeltmaterialshouldnotbe
allowedtocomeincontactwithanysharpormetaledge,includingwhenthebeltpassesthroughthe
seat.
DrivingSuit:Thedriver’ssuitshouldbeconstructedofmulti-layeredfireretardantmaterialofSFIrating
3.2A/5orabove.Fireretardantglovesandshoesaremandatory.Nomex(orequivalent)underwear,
socks,headsockand/orheadskirtarealsoSTRONGLYRECOMMENDED.Armrestraintsarealso
STRONGLYRECOMMENDED,asarekneepadsand/orprotectionaroundornearsteeringbox.
Helmets:AlldriversAREREQUIREDtowearafullfacehelmetwithaminimumsafetyratingofFIA
8860-2010,SnellSA2005,SnellSA2010,SnellSAH2010and/orvalidSFI31,1/2005/2010label.Or
newer
RockScreens:STRONGLYSUGGESTED
RaceCeiverRadio:AWORKINGRaceCeiverRadioismandatory,channel454.000.Failingtohavea
workingradio,ordisobeyingaWilmotOfficial’svoicecommandcanleadtodisqualificationand
forfeitureofmoneyearned.
•NOMIRRORS,radios(otherthanRaceCeiver)orcommunicationequipmentallowed.
•Nohollowordrilledoutbolts
UNSPORTSMAN-LIKECONDUCT:Whileweunderstandthatautoracingisahighlyemotionalsport,we
understandthatgoodsportsmanshipisthecornerstoneofanyraceprogram.Thismustincluderespect
forallparticipants,WilmotOfficials,trackownership&staff,pushtruck&wreckercrews,fans,and
sponsors.Whileweunderstandtheemotion,Wilmotwillnottoleratepublicdisplaysofpoor
sportsmanship,stoppingyourracecaronthetracktodisputeacallorscoringplacement,fighting,
harassment,orverbalabuse.Threateningorobscenegesturesand/orlanguageaimedatanofficialor
competitor,roughdriving,fighting,pushingorassaultinganofficial,ordestroyingWilmotpropertycan
resultindisqualification,forfeitureofmoney,banishmentfrompremises,probation,and/orsuspension.
Incaseofsuspension,ifanumberofracedatesarehandedout,rain-outsdonotcount.Ifmoneyhas
beenpaidpriortoaninfractionofanykindandapenaltyassessed,themoneyMUSTBEreturnedto
Wilmotpriortoanyfurthercompetitionattheraceway.Driversandownersareresponsibleforthe
actionsoftheircrews.Enteringanotherracer’spitstallinanaggressivemannerisalreadyafaultandin
situationswhereproblemsescalatebecauseofitwillhavethattakenintoconsideration,thusstayoutof
othercompetitor’spitstalls.Itshouldbenotedthatteammemberswhosecarisnotonthescales,orin
theworkarea….HAVENOBUSINESSBEINGINTHOSEAREAS!Inclosing,sportsmanshipdoesnotjust
pertaintoactivitiesatthetrack.Rememberwhatyousay,ortype,hasmeaningandwhatyoudohas
consequences,sopleasethinkbeforeyoulashout.
•Noalcohol,orillegaldrugsmaybeconsumedbyadriverbeforeorduringanevent.Wereservethe
righttohavethetrackmedicalstaffdetermineifadriver,whowemaysuspectofdoingeither,befitfor
competition.
•Parentsareresponsiblefortheirminorchildren’sactionsandsafetywhomtheysignareleaseforto
gainentrytothepitarea.Thepitareaisconsideredarestrictedarea.
SPIRITOFTHERULE
Althougheveryefforthasbeendirectedtowardscomplete,understandable,andcorrect
rules,Wilmotcan’tpossiblyanticipateeverysituation,circumstance,orinterpretation.With
thisinmind,wemustrefertotheSPIRITOFTHERULE.SpiritoftheRulemeansvery
simply,theintentofeveryruleandclassification.Additionaladjustments,alterations,
modifications,and/orreplacementsnotcoveredbywrittenrulesshouldNOTbeassumed
tobelegalundertheSPIRITOFTHERULE.SPIRITOFTHERULEwillbethefinal
criteriabywhichruleswillbeinterpretedandenforced.
RULEBOOKDISCLAIMER
Therulesand/orregulationssetforthhereinaredesignedtoprovidefororderlyconduct
ofracingeventsandtoestablishminimumacceptablerequirementsforsuchevents.These
rulesshallgoverntheconditionofallevents,andbyparticipatingintheseevents,all
participantsaredeemedtohavecompliedwiththeserules.NOEXPRESSEDOR
IMPLIEDWARRANTYOFSAFETYSHALLRESULTFROMPUBLICATION
OFORACOMPLIANCEWITHTHESERULESAND/ORREGULATIONS.They
areintendedasaguidefortheconductofthesportandareinnowayaguaranteeagainst
injuryordeathtoaparticipant,spectator,orofficial.
TheWilmotRacewayshallbeempoweredtopermitminordeviationfromanyofthe
specificationshereinorimposeanyfurtherrestrictionsthatinhisopiniondonotalterthe
minimumacceptablerequirements.NOEXPRESSORIMPLIEDWARRANTYOF
SAFETYSHALLRESULTFROMSUCHALTERATIONOFSPECIFICATIONS.
AnyinterpretationordeviationoftheserulesislefttothediscretionoftheWilmotOfficials.