LSOUTLAW275
CLASSOVERVIEW
Thisclassisa1/8thmileheads-upsmall3reclassdesignedforLSpoweredvehicles.Enginesare
allowedtheuseofasinglepoweradderwhichisrestrictedinsizetomaintainclassparity.
Note:Thissetofclassrulesispresentedtoallcompe3torsundertheassump3onthatany
modifica3onsnotspecificallywriBenwithintheserulesshallbedeemedillegal,unlessthe
compe3torhastheexpressedwriBenconsentfromtheLSFestTechDirector.
RACINGFORMAT
Thisclasswillbeanallrunheads-upfield,NHRAProStyleLadderona.400ProTree.
POWERADDERBASEWEIGHT
Nitrous
Supercharger
TwinTurbo76mm
TwinTurbo88mm
SingleTurbo88mm
SingleTurbo106mm
SingleTurbo118mm
Unlimited
2950
3000
3300
2800
3000
3100
REQUIREMENTS&SPECIFICATIONS
ENGINE:1
BLOCK
AnyGMLSstyleblockpermiBed
HARMONICBALANCER
SFISpec18.1balancerisrequired.
ENGINEMOUNTS&LOCATION
Engine/motorplatesandmid-platesarepermiBed.Engineblockandcylinderheadscannotbe
incontactwiththefirewall.
ENGINECOATINGS
Theuseofenginecoa3ngsispermiBed.
CRANKSHAFT
AnyaZermarketsteelcrankshaZsarepermiBed.
CONNECTINGRODS
AnyaZermarketconnec3ngrodsarepermiBed.
PISTONS&PINS
AnyaZermarketpistonsandpinsarepermiBed.
PISTONSRINGS
AnyaZermarketpistonringsarepermiBed.
CAMSHAFTDRIVESYSTEM
AnycamshaZdrivesystemispermiBed.
CAMSHAFT
AnycamshaZispermiBed.
LIFTERS/LASHADJUSTERS
AnyliZers/lashadjusterspermiBed.
CYLINDERHEADS
FactoryOEMoraZermarketcastironoraluminumGMLSbasedinlinevalveheadsare
permiBed.Billetandone-offfabricatedheadsareprohibited.
INTAKEMANIFOLD
AnyaZermarketintakemanifoldpermiBed.Fabricated,sheetmetal,billet,andanytunnelram
intakemanifoldarepermiBed.
NITROUSOXIDE
Anynitroussystemallowed.PushsystemsarepermiBed.Theuseofwaterinjec3ononnitrous
assistedpoweraddercombina3onsispermiBed.Wateristheonlysubstancethatmaybeused
inwaterinjec3onsystems.Theuseofanyagentsotherthannitrousoxideinthenitroussystem
isprohibited.Nitroussystemsmustonlyusegasolineforthefuelenrichmentcircuit.Nitrous
systemsmustonlybeac3vatedbyawide-openthroBleswitch.Maximumoftwo15pound
nitrousboBlesareallowed.AllnitrousboBlesmustbestampedasmee3ngtheminimumDOT
1800poundra3ng.
CENTRIFUGALSUPERCHARGER
Superchargerimpellerwheelmustbeconstructedofonlyaluminum.Anyothermaterialusedin
theconstruc3onofthesuperchargerimpellerisprohibited.Theinjec3onofanysubstancein
thecompressorhousing/voluteairinletorthedischargesideofthesuperchargerisprohibited.
SINGLETURBOCHARGER
Acceptedsingleturbochargerswiththefollowcompressorimpellerinducerdiameterare:
118mm/4.645inches,106mm/4.173inchesand88mm/3.465inches.Compressorwheel/
impellermustonlybeconstructedofcastorbilletaluminum.TurbochargerispermiBedafresh
airsourcefromeitherthefrontbumperorgrilleareaofthevehicle.
TWINTURBOCHARGERS
Acceptedtwinturbochargerswiththefollowcompressorimpellerinducerdiameterare:76mm/
2.992inchesand88mm/3.465inches.Compressorwheel/impellermustonlybeconstructedof
castorbilletaluminum.TurbochargerispermiBedafreshairsourcefromeitherthefront
bumperorgrilleareaofthevehicle.
Turbochargersizewillbeverifiedbyoneorbothofthefollowingmethods:
1. Bymeasuringthehousingboreattheleadingedgeoftheimpellerwheel.Themaximum
diameterofthehousingboreattheleadingedgeoftheimpellerwheelmaynotexceed
2mmmorethanthemaximumallowableturbochargersizepermiBedinthisclass.
2. Bymeasuringtheimpellerinducerwheelwheretheleadingedgeoftheinducerwheel
meetsthehousing.Thewheel/bladecontourfromtheinducertotheexducermustbe
con3nuouswithoutsteps.
INTERCOOLING
AllboostedentriesarepermiBedtouseoneintercooler.Intercoolerscaneitherbeair-to-airor
air-to-water.Waterand/oricearetheonlyagentsallowedtobeusedwithintercoolers.Theuse
ofanyotheragenttoassistinthecoolingofdischargeand/orinletairforboostedapplica3ons
isprohibited.
OILINGSYSTEM
Anyoilpump/systempermiBed.
OILRETENTIONDEVICE
Allentriesarerequiredtohaveanoilreten3ondevice.Thedevicecaneitherbeacustombuilt
ballis3cblanketora‘’belly’’stylepan.Thepanmaybeconstructedfromcompositeormetal.It
musthavever3calwallsofatleast2inchesinheight.Panmustextendfromframerailtoframe
railandmustextendfromfrontoftheenginemoun3ngplatetotherearoftheengineblock.
PanmustbeaBachedwithaminimumofthreeaBachmentpointsperside.
COOLINGSYSTEM
AnycoolingsystempermiBed.Radiatorsarenotrequired.
EXHAUSTSYSTEM
AnyexhaustsystempermiBed.Allexhaustsystemsmustbedirectedoutofbodyandawayfrom
driverandfueltank.
FUELSYSTEM
Anyelectronic,mechanicalorbeltdrivenfuelpumpsareallowed.Electronicfuelpumpsmust
shutoffwiththemasterelectriccut-offswitch.Fuelcellmusthaveapressurecapandbe
ventedtotheoutsideofthebody.FrontmountedfuelcellsmustmeetSFISpec28.1andbe
mountedbetweentheframerailsorenclosedinaroundtubeframe.Aroundtubeframemust
beconstructedofaminimumof1¼-inchO.D.x.065-inchchromemolytubing.Ar3ficialcooling
orhea3ngoffuel(i.e.,coolcans,ice,Freon,etc.)prohibited.Circula3ngsystemsthatarenot
partofthenormalfuelpumpsystemareprohibited.
EFISYSTEM
AnyaZermarketelectronicormechanicalfuelinjec3onmaybeused.Fuelinjectorsizeandor
typeareunlimited.
THROTTLEBODY
AnyaZermarketthroBlebodypermiBed.Boostedapplica3onsarelimitedtoasinglethroBle
bodyandallotherentriesarepermiBedtwo.
CARBURETOR
AZermarketcarburetorsarepermiBedwithamaximumoftwocarburetors.Splitdominators
arepermiBed.
THROTTLELINKAGE
ThroBlecontrolmustbeoperatedbythedriver’sfoot
FUEL
Nitrousentriesaretousegasolineonly.Superchargedandturbochargedcombina3onsare
permiBedtousegasoline,Efuelsormethanol.Theuseofnitromethaneisprohibited.
DRIVETRAIN:2
CLUTCH,FLWHEEL&FLYWHEELSHIELD
Clutchandflywheelmee3ngSFISpec1.1or1.2uptoatwin-discmaximumismandatory.Steel
flywheelshieldmee3ngSFISpec6.1ismandatory.Flywheelshieldcannotbemodifiedfor
clutchadjustmentand/orcoolingholes
MANUALTRANSMISSION
AZermarkettransmissionswithamaximumof5forwardspeedsarepermiBed.Clutchless
transmissionsarepermiBed.Allgearchangesmustbeadirectac3onofthedriver.Pneuma3c,
electric,hydraulic,etc.shiZersareprohibited.
AUTOMATICTRANSMISSIONS
AnyOEMoraZermarketautoma3ctransmissionispermiBed.Anytorqueconvertoris
permiBed.Trans-brakesarepermiBed.Pneuma3c,electric,hydraulic,etc.shiZersare
permiBed.
DRIVELINE
AnydriveshaZispermiBed.
REAREND
AnyOEMautomo3vetyperearendpermiBed.
BRAKES,STERRING&SUSPENSION:3
BRAKES
Frontandrearhydraulicbrakesarerequired.Automatedbrakesareprohibited.Theapplica3on
andreleaseofthebrakesmustbeafunc3onofthedriver.Dualreservoirmastercylinderis
required.Line-lockispermiBedonlyonthefrontwheelsusingoneline-lockbuBonand
solenoid.Anyotherelectrical,pneuma3c,hydraulic,etc.switchinbrakingsystemisprohibited.
STEERING
AnyAmericanproduc3ontypesteeringsystempermiBed.
SHOCKS/STRUTS
AZermarketstock-typeshocks/strutspermiBed.Rearcoil-overshocksarepermiBed.
FRONTSUSPENSION
Post1978andNewerVehicles:Stock,aZermarketortubulartypeK-memberpermiBed.Kmembermustmountinitsoriginalloca3on.K-membermaybenotchedforoilpanclearance.
Factorystrut/shocktowersarerequired.Bolt-ontypecaster/camberplatesarepermiBed.
FactoryoraZermarketcontrolsarmsarepermiBed.
Pre-1978andOlderVehicles:TheuseofaZermarketbolt-onfrontsuspensionkitsforengine
fitmentispermiBed.Factorystrut/shocktowersareallowedtobemodifiedforenginefitment
andmustmaintainanOEMappearance.
REARSUSPENSION
Stock-type,ladderbar,andracing4-linkrearsuspensionsystemsarepermiBed.
WHEELIEBARS
TheuseofwheeliebarsispermiBed.
FRAME:4
FRAME
Frontframerailsarerequired.Tubingforwardofthestruttowerorforwardofthecontrolarm
moun3ngpointispermiBed.Back-halvedcarsarepermiBed.NitrousentriesarepermiBedto
havetubechassis/ProStockstylecars.
WHEELBASE
Entriesmustretainstockwheelbasedimensionsof+or–1inch.Maximumwheelbasevaria3on
fromleZtorightis1inch.
GROUNDCLEARANCE
Aminimumof3inchesfromthefrontofthevehicleto12inchesbehindfrontspindlecenterline
ismandatory.Aminimumof2inchesfortherestofthevehicleismandatory(exceptforoilpan
andexhaustheaders).
TIRES&WHEELS:5
TIRES
275mmradialor28x10.5nonWslickaretheonly3respermiBedforallboostedentries.
NitrousentriesarepermiBedtouseanysizedragradialorbias-plyslick.
WHEELS
AZermarketracingwheelspermiBed.
INTERIOR:6
UPHOLSTERY
AZermarketfiberglassorcarbonfiberdashispermiBed.Aremovabletransmissiontunnelis
permiBed.
STEERINGCOLUMN/WHEEL
AZermarketsteeringcolumnsandsteeringwheelsarepermiBed.
BODY:7
BODY
AllvehiclesmustmaintainaFactoryOEMappearanceforyear,makeandmodelbeingused.
Lightweightbodypartsarerestrictedtothefollowing:hood,fenders,bumpers,doors,and
trunk-lid/deck-lid.Hood,trunk-lid/deck-lid,anddoorsmustbehingedorbeliZoffmodels.
HOODSCOOPS
ForwardfacinghoodscoopsarepermiBedfornitrousassistedentriesandmaynotextend
abovetheroofline.VehiclesthatareequippedwithanEFIsystemarenotrequiredtoruna
hoodscoop.Carburetorsmustbecompletelycoveredbythehoodorhoodscoop.
WINDSHIELD&WINDOWS
OEMglassorNHRAapprovedLexanisrequired.
WING/SPOILERS
AllentriesarepermiBedtouserearwing/spoilers.Wing/spoilersareallowedamaximum
lengthof26inches.Anyadjustmentstothewing/spoilerduringarunareprohibited.
ELECTRICAL:8
BATTERIES
BaBerymayberelocatedandmustbeanautomo3vetype.
IGNITION
AnybaBeryoperatedigni3onsystempermiBed.Distributorlessigni3onsystemsarelimitedto
onecoilpercylinderonly.
MASTERCUTOFF
AmastercutoffswitchismandatoryonallvehicleswithabaBerylocatedinthetrunk.
STARTER
AZermarketstarters,instockloca3onpermiBed.
SUPPORTGROUPS:9
COMPUTER/DATARECORDERS
TheuseofdatarecordersispermiBed.
BRACKETRACINGAIDS
Theuseofanybracketracingsaidssuchasop3calsensors,delayboxes,shuBerboxes,throBle
stops,etc.areprohibited.Theuseofanydevice(electricalormechanical)thatallowsadriverto
ascertaintheposi3onoftheirvehicletothestar3nglineisprohibited.
PRESSURIZEDBOTTLES
AllpressurizedboBlesmustmeetD.O.T.1800lbminimumspecifica3on.
TOWVEHICLES
TheuseoftowvehiclesispermiBed.
CREWMEMBERS
Eachcrewmembermusthavetheproperstar3nglinecreden3alsandmustwerematching
aore.
DRIVER:10
DRIVER
Thedriverwheninthevehicle,fromthereadylineun3lthevehicleissafelystoppedonthe
returnroad,isrequiredtohaveallsafetyrestraintsystems(includingthehelmet)onandbe
securelyfastenedinthevehicleatallYmes
CRENDENTIALS
AValidstateorgovernmentissueddriver’slicensebeyondalearner/spermitlevelismandatory
forcarsrunning10.00orslower.AvalidNHRAcompe33onlicenseismandatoryforcarsrunning
9.99orquicker,ataNHRAMemberTrack.AvalidNHRAoranIHRAcompe33onlicenseis
mandatoryatanIHRAMemberTrack.
Note:Itisul3matelythecompe3tor’sresponsibilitytofamiliarizethemselveswiththeLSFest
classrequirementsaswellasallNHRAsafetyrequirements.Thecompe3toragreestheybear
theul3materesponsibilitywhenitcomestosafetyandhowitcomplieswiththeLSFestWest
event.Thecompe3toralsoagreesthatnooneelseotherthanthecompe3torisinthebest
posi3ontoknowabouthowtheirpar3cularracecarhasbeenconstructedandhowtosafely
operateit.