Radical Sportscars SR5 User manual

SR5
RadicalSportscars
SR5
RadicalOwnersManual

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RadicalMotorsportLtd
24IvattWayBusinessPark
Westwood
Peterborough
PE37PG
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[e-mail]
www.RadicalSportscars.com
DearRadicalOwner
ManythanksforpurchasingaRadicalSR5sportscar.
Whetheryouintendrunningyourcarattrackdays,enteringitinsprintsandhillclimbs,orcompetinginthe
widerangeofcircuitracingavailabletoyou,onethingremainsconstant.Awell‐maintainedandprepared
sportscarwillensurethatyougetthemaximumperformanceandreliabilitythatRadicalisrenownedfor
theworldover.
Radicalshavecoveredhundredsofthousandsoftrackday,testdayandracingmiles.Thismanualhighlights
manyofthelessonsandtipswehavelearned.Donotstartyourcaruntilyouhavereadit.
YourRadicalhasbeendesignedwithoneobjective–togiveyoutheultimatedrivingpleasure!
Happydriving
Mick Hyde
MickHyde
ForRadicalMotorsportLtd
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Sales
T:+44(0)1733331616
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[e-mail]
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TechnicalSupport/Parts
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Powertec(Engine)
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Figure1‐RadicalSR5atDubaiAutodrome(September2007)
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SR52007RadicalOwnersManual.docx–issue1‐22/11/07‐2‐Issued:21/09/06

SR52007RadicalOwnersManual.docx–issue1‐22/11/07‐3‐Issued:21/09/06
CONTENTS
PREPARATIONFORSHAKE‐DOWN..........................................................................................................................................4
DRIVINGPOSITION..............................................................................................................................................................4
CHECKALLFLUIDLEVELS.......................................................................................................................................................5
STARTINGTHEENGINE.........................................................................................................................................................5
RUNNINGTHEENGINE..........................................................................................................................................................5
GEARBOX...........................................................................................................................................................................7
STANDARDSR5GEARRATIOS...............................................................................................................................................7
FLAT‐SHIFT........................................................................................................................................................................8
PNEUMATICPOWERSHIFT....................................................................................................................................................8
BEDDING‐INBRAKES............................................................................................................................................................8
FUEL.................................................................................................................................................................................8
DASHBOARD.......................................................................................................................................................................9
REVINDICATOR...................................................................................................................................................................9
CENTRE‐LOCKHUBNUTS.....................................................................................................................................................9
AIRJACKS..........................................................................................................................................................................9
GENERALSETUPPROCEDURE–FLATPATCH...........................................................................................................................10
SUSPENSIONGUIDE–DRYSETUP........................................................................................................................................10
STEERINGRACKSETUPPROCEDURE....................................................................................................................................11
RIDEHEIGHT....................................................................................................................................................................11
CORNERWEIGHTS..............................................................................................................................................................11
BRAKEBIASSETTINGS........................................................................................................................................................12
GENERALCARPREPARATION...............................................................................................................................................12
DRIVINGTECHNIQUE.........................................................................................................................................................12
SR5DECALDESIGNSHEET..................................................................................................................................................13
RACE/TESTHISTORY........................................................................................................................................................14
COMPONENT‘LIFING’CHART–...........................................................................................................................................15
INTRAXDAMPERINFORMATION..........................................................................................................................................16
3wayadjustabledamperInformation.....................................................................................................................16
Compressionadjustment:.........................................................................................................................................16
Reboundadjustment:................................................................................................................................................16
InTraxdampers‐springchart...................................................................................................................................17



PREPARATIONFORSHAKE‐DOWN
Beforetakingtothetrack,itisimportantthatyoucarryoutathoroughspannercheck,payingparticular
attentiontoallhoses,connectionsandsuspensionfixings,brakebiasetc.
Theoillevelmustbecheckedusingthedipsticksupplied.Thelevelmustbemaintained
betweenthetoptwomarkswhenhot,andbetweenthebottomtwo
markswhencold.ThelevelshouldbecheckedAFTERrunningthe
engine,andholdingtherevsat3,000rpmfortenseconds,toallow
theoiltobescavengedback.Theengineshouldbeturnedoff,to
checkthelevel.
RadicalrecommendSilkoleneProRsynthetic‐basedracingoil(or
similarifthisbrandisnotavailable).
Warning
Donotrevtheenginemorethan3,000rpm(oneyellowlightonthe
dash)untiltheoiliswarm.Whencoldtheoilcanrunat100psi,which
maydamagetheoilcooler.
Inthebrakeandclutchmastercylinders,useonlyhightemperatureracingbrakefluid.
Theenginecoolingsystemusesa50:50anti‐freeze/watermixture.Thelevelshouldbetothetopofthe
swirlpot.
DRIVINGPOSITION
Thecombineddriverandpassengerseatmaybeadjustedforwardandbackwardtosuitindividualdrivers.
Pleasenote:Theseatbeltcrutchstrapwillalsoneedadjusting.
Thepositionofthepedalscanalsobeadjustedbya)adjustingthepedalface,b)adjustingthepedalangle
andc)bymovingthepedalpivotshaft.Pleasenotethatc)willrequirechangingthemastercylinderpush‐
rods.
IfyourSR5isfittedwithaPowertecPS2pneumaticpowershifter,pleaserefertotheseparate
manufacturersoperatinginstructions.

SR52007RadicalOwnersManual.docx–issue1‐22/11/07‐4‐Issued:21/09/06

SR52007RadicalOwnersManual.docx–issue1‐22/11/07‐5‐Issued:21/09/06
CHECKALLFLUIDLEVELS
•Checkthatoilisvisibleintheoiltank.(Theexactlevelcanonlybecheckedoncetheengineiswarm–
seestartingprocedure.)
•Checkthebrakeandclutchreservoir.
•Checkthatcoolantlevelistothetopoftheswirlpot.
RECOMMENDEDLUBRICANTS&FLUIDS
Engineoil:SilkoleneProR15/50(orsimilar)
Gearbox:useSilkoleneBOA90LSlimited‐slipgearoil
MasterCylinders:SilkoleneProrace2000brakefluid(DOT4orsimilar)
Fuel:98octaneunleadedor100octaneracefuel(CAM2or108octaneintheUS)
Coolant:50/50mixtureofwater/anti‐freeze
STARTINGTHEENGINE
1. AlwaysstarttheenginewithalaptopconnectedtotheECUsothatallengineparameterscanbe
monitoredduringwarm‐up.
2. Checkoilisvisibleinoiltank.Checkwaterlevelinswirlpot.Theactualoilleveldoesnotmatteratthis
point,becauseanamountofoilhasdrainedbackintotheengine–thisreturnstothetankwhenthe
engineisstarted.
3. Crankenginetogetoilpressurewithignitioncoilsdisconnected.
4. Connectcoilsandturnignitionon.Startenginewithnothrottle,letengineidleatapproximately2,000‐
3,000rpm.Checkoilpressureisat60psiminimum.
5. Whenenginewatertemperaturereaches50°C,revengineseveraltimestoover3,000rpmandturnoff.
6. Immediatelycheckoillevelwithdipstick.
RESTARTINGPROCEDURE
1. Ideally,theengineisstarted45minutespriortogoingontrack.Turnoffwhenthewatertemp.reaches
85°Candallowheattosoakintotheengine.Restart10minutesbeforegoingontrackandgetthe
temperatureto75°C.
2. Theoillevelshouldbecheckedeveryhourofrunninganditshouldbetoppeduptothelevelindicated
above.
RUNNINGTHEENGINE
Donotruntheengineunderloadif:‐
a) oiltemperatureisbelow60°C
b) oiltemperatureisabove120°C
c) watertemperatureisbelow60°C
d) watertemperatureisabove100°C
e) oilpressurewhenuptotemperatureat4,000rpmisunder50psi.

Theoilpressurewhentheengineisstartedfromcoldshouldrunat90psiat4,000rpm.Whenupto
temperaturetheoilpressureshouldread60psiat4,000rpm.
Maximumenginerevs:‐8,600rpm
Therevlimiterissetto8,600rpm.Persistentuseoftherevlimiterwilldamagetheengine.
Theengineoilandfiltershouldbechangedeverysix(6)hoursofrunning.
Donotattempttoadjustslowrunningspeed,oranyotherengineparameterwithoutalaptopconnectedto
theECUrunningthecustomerversionofLIFESystemssoftware(availablefromPowertec).
Itisimportanttologthenumberofhourstheengineisrun.Theengineshouldrunfornomorethan30
racinghoursbeforebeingreturnedtothefactoryforarebuild.Iftheengineisstressedless(i.e.trackday
orroaduse)thecarshouldbereturnedtothefactoryevery30hoursforarollingroaddynamometertest.
Engineswhicharenotraced,regularlycover90hourswithoutrequiringattention(providingtheyarenot
over‐revved.Particularcareandattentionshouldbepaidtothedown‐shifts).
Note:Intheeventthattheenginestalls,theignitionmasterswitchmustbeturnedoffandthenonagain
(afteratwoseconddelay)toresettheECU.
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
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Figure2RadicalSR5atMagnyCours

SR52007RadicalOwnersManual.docx–issue1‐22/11/07‐6‐Issued:21/09/06

SR52007RadicalOwnersManual.docx–issue1‐22/11/07‐7‐Issued:21/09/06
GEARBOX
GEARBOXMAINTENANCE
TheSR5issuppliedwithaHewlandJFRsix‐speedsequentialtransaxle.Hewlandtransaxlesshouldhavethe
crownwheel/pinionandgeardogsinspectedforsignsofwearaftereveryevent.(Refertothe
manufacturersmanualforinspectionandrepairprocedures.)
Crownwheeel&pinion:12:34
Crownwheel&pinionratio:2.833:1
GEARING
RatiosintheSR5arenotcontrolled,socananmaybechangedtosuitdifferentcircuits.The‘short’set
listedbelowisanoptionfortightertracks(i.e.BrandsHatch).Agearratiochartforcalculatingsuitable
ratiosisavailableat:www.hewland.com.PleaserefertoHewlandgearboxmanualor
website:www.hewland.comforchanginggearratios.
STANDARDSR5GEARRATIOS
FORCARSBUILTBEFORE16/11/2007

GearPartno.:Ratio
1stCS‐1608‐12:352.917
2ndFTR‐15:33‐HUB2.200
3rdFTR‐17:31‐STD1.824
4thFTR‐15:25‐STD1.667
5thFTR‐17:25‐STD1.471
6thFTR‐18:24‐STD1.333

FORCARSBUILTAFTER16/11/2007
SR5Ratios–16”rearwheels1
GearShort
(optionfortighttracks)
Long
(fittedasstandard)
1st12:38
68mph
12:38
68mph
2nd14:33
91mph
14:33
91mph
3rd15:29
111mph
16:30
108mph
4th15:26
122mph
17:27
135mph
5th17:27
136mph
17:25
147mph
6th16:24
143mph
18:25
154mph






1Revlimitsetto8,500rpm



SR5Ratios–13”rearwheels2
GearShort
(optionfortighttracks)
Long
(fittedasstandard)
1st12:35
65mph
12:35
65mph
2nd15:34
84mph
15:33
87mph
3rd15:27
106mph
17:30
108mph
4th16:25
121mph
16:24
128mph
5th19:27
134mph
18:24
144mph
6th18:24
142mph
21:26
153mph


2Revlimitsetto8,200

SEQUENTIALGEARCHANGE–HEWLANDJFR
TheSR5issuppliedwiththegearselectionsetto“pullleverbacktoshiftupthebox”and“pushlever
forwardtoshiftdownthebox”.Toengageneutralfrom1stgearliftthelevergentlyontherighthandside
oftheseatandpushthegearleverforwardonce,tofindreversepushforwardagainwiththesmalllever
stilllifted.TheorderisR,N,1,2,3,4,5,6.
GEARBOXOIL
Withoilcooler:2.2litres
Withoutoilcooler1.7litres
FLAT‐SHIFT
IfyourSR5isfittedwithaflat‐shiftsystem,theclutchneednotbeoperatedgoingupthegearbox.
PNEUMATICPOWERSHIFT
IfyourSR5isfittedwithaPowertecpneumaticpaddle‐actuatedpowershiftsystem,pleaserefertothe
manufacturersoperatinginstructions.
BEDDING‐INBRAKES
Thecarcomesfittedwithcarbonmetallicbrakepads.Tobedinthebrakesandachievemaximumstopping
power,afilmofcarbonmustbetransferredtothediscs
Gentlyapplybrakes6to8timesatmediumspeed.Increasespeedtosimulateraceconditions,andapply
brakeshardafurther6to8times.
Allowbrakestocoolfor15minutes.Donotapplybrakeswhilststationaryduringcoolingdownperiod.
UseonlyRadicalrecommendedbrakepads.
FUEL
TunedenginesintheUSAshouldonlyberunonracingfuelsuchascam2,oraminimumof108octane.We
doNOTrecommendmixingoctaneboosterswithpumpfuel.
WARNING
Thefuelfilterwillrequirechangingaftertheinitialrun.Itislocatedtotheleftoftheengine.

DASHBOARD
REVINDICATOR
Yellow3‐4–5,Green6‐7–8,Red8.2–8.5
*Temperaturesarenotdisplayeduntilthefluidsreach45°C.
Whenignitionisswitchedon,thedashrunsthroughatestdisplay.
Hightemperaturesorlowpressureswilltriggeralargewarninglightadjacenttothegaugeitisindicating.
Withignitionon,pressthedatabuttontoshowmaximumrevstodate(lasttwodigitsnotshown).The
maximumrecordedrevsdisplaymayberesetbythefactory,orbyanapprovedRadicaldistributor.
CENTRE‐LOCKHUBNUTS
AnodisedREDforleft‐handside,
AnodisedBLUEforright‐handside.
TorqueSetting–200ftlbs
AIRJACKS
Carsfittedwithairjacksaresuppliedwithanairlance,whichisinsertedintoavalveattherearofthecar.The
lancerequiresconnectiontoabottledairsupply,andthepressureshouldberegulatedto250‐300lb

SR52007RadicalOwnersManual.docx–issue1‐22/11/07‐9‐Issued:21/09/06

SR52007RadicalOwnersManual.docx–issue1‐22/11/07‐10‐Issued:21/09/06
GENERALSETUPPROCEDURE–FLATPATCH
1. checkscalesareflatandzeroed
2. disconnectanti‐rollbars
3. reset(zero)shocksabsorbers
4. settyrepressures
5. checkfrontpushrodsareequallength
6. checkfrontspringpre‐loadissetcorrectly
7. ballastcarfordriver
8. setrideheight(procedurebelow)
9. setcambers
10. settoes
11. setcornerweightsbyadjustingrearspringplatforms(ensuretheyarenotpre‐loaded).
12. re‐connectanti‐rollbars,ensuringtheyhavenopre‐load
13. resetshockabsorberstocentresettings
14. removeballast
15. checkthatfrontdiffuserislevel,bothfront‐to‐rearandleft‐to‐right,andissettothecorrectground
clearance
SUSPENSIONGUIDE–DRYSETUP
Thecarissetupatthefactorybut,thefinalsettingsshouldbearrivedatbytestingfortheparticular
driver’spreferenceandtheparticularcircuit.Trytocheckthetyretemperaturesforbalanceacrossthe
contactpatchwithinoneminuteofafastlap.Theinsideedgecanbe10°‐15°higherthantheouteredge
onradialplyslicktyres.
Front:
RideHeight:85mm 
Diffuserheight:55mm
(min)
Pre‐load(no.ofturns):6 
Shocksettings:Avo:6
Intrax:centreofrange
Tyrepressure(Dunlop):Hot:24‐28psi
Cold:16‐18psi
Springrate:7”×300lb
Camber: ‐2½°to‐3½°
Toein:2mm‐3mm
overall
Nik‐link:Medium

Rear:
RideHeight:75mm
Pre‐load(no.ofturns):0
Shocksettings:Avo:8
Intrax:centreofrange
Tyrepressure(Dunlop):Hot:24‐28psi
Cold:16‐18psi
Springrate:7”×350lb
Camber:‐2°to‐3°
Toein:2mm‐3mm
Nik‐link:medium

Note:Measuretherideheightatfrontofthechassisandattheseatbackbulkhead,(belowrolloverbar)
withthedriverseatedandthreegallonsoffuelinthetank.
