Nws yuav tau ntxim hlub thiab txias hais tias 20 xyoo dhau los, BMW tau tsim ib txoj hauv kev los tsoo Porsche's GT class dominance, tsuas yog siv lawv cov wits thiab ib qho inline-rau, tab sis qhov ntawd yuav tsis yog tag nrho.Lub cav S54B32 tsuas yog ua si thib ob-fiddle rau ntau qhov kev tawm tsam 4.0L V8, tab sis qhov ntawd yog lwm zaj dab neeg.Ib nqe lus tseeb ntau yuav yog tias S54 tau hais txog qhov kawg ntawm txoj kab rau lub shrieking, ib txwm xav tau M50 / S50 tsev neeg ntawm BMW inline sixes.
Nws yog tus qauv tsim los ntawm qhov pib kub-rodding ib txwm: ntxiv bore thiab mob stroke rau lub qub cav thiab ntxiv cov cuab yeej tshiab muaj nyob rau hauv daim ntawv ntawm Double VANOS (BMW hais lus rau qhov sib txawv cam phasing ntawm ob qho tib si ntawm ob qho tib si overhead camshafts, muaj peev xwm kho tau. qhov kev noj haus centerline ntawm 70-130 ° thiab lub tso pa centerline ntawm 83-128 °).Ntxiv cov pob me me hauv compression (rau 11.5: 1), ib tus neeg lub cev throttle, ntiv tes-follower rocker cam followers, yav tas los tau hais Ob Chav VANOS, thiab ib qho khoom siv sab hauv ob-theem ntub-siv roj lauj kaub, thiab qhov no high-feature rau- Lub tog raj kheej ua ib yam dab tsi tshwj xeeb heev rov qab rau xyoo 2001 thiab tseem niaj hnub no.
Muaj qhov tso zis tshwj xeeb ntawm 104 horsepower-ib-liter thiab stratospheric 8,000-rpm redline tsis hnov txog sab nraud ntawm nruab nrab lub cav Italian ob-seaters lossis Japanese ob-wheelers.Qhov zoo nkauj tiag tiag ntawm lub cav no pom meej thaum koj rhuav tshem cov tsiaj nyaum no.CNC-profileed intake runners, CNC-milled combustion chambers, loj alloy li qub, bronze valve qhia, thiab ib tug huv-dense alloy casting tag nrho zoo li ntau nyob rau hauv tsev ntawm ib tug sib tw cav tshaj ib yam dab tsi uas tawm ntawm cov kab ntau lawm.
Daim ntawv teev npe no nyeem zoo li kev npau suav rau feem ntau cov hav txwv yeem-carving, Ultimate Tsav Tsheb purists.Hmoov zoo, rau lwm tus ntawm peb, tom qab kev muag khoom pub ib qho kev xav tau rau peb cov uas hlub txhawb nqa.Drifters, luag racers, thiab lub sij hawm tawm tsam junkies zoo siab nyob rau hauv loj ib leeg-turbo cov khoom los yog centrifugal-blower koob meej.Qhov kev zoo nkauj tiag tiag ntawm kev hloov kho cav yog qhov khoom plig uas koj sau, thaum cov mills high-volumetric-efficiency mills tau txais qhov kev xav tsis zoo thiab kev txhawb nqa tsim nyog.Cov khoom no yuav coj koj, qhov kawg lub zog fiends, los ntawm cov txheej txheem ntawm kev npaj lub sab saum toj kawg rau lub hwj chim loj ntawm boost.
Thaum pib, peb yuav disassemble thiab tshuaj xyuas peb cov tub ntxhais casting.Ib qho kev tiv thaiv yog ib phaus kho ntawm no.Muab lub sijhawm thiab nyiaj txiag zoo li no rau hauv kev ua haujlwm uas tsis siv tau yuav yog qhov yuam kev loj heev.Thaum S54 tsis muaj lub koob npe nrov rau cov kab nrib pleb, siv sij hawm los ntxuav, pom qhov muag, thiab ntsuas qhov ntsuas lub tsho dej yog qhov tsim nyog.
Qhov koj tsis paub tuaj yeem ua rau koj thiab koj lub hnab nyiaj.Nws yog ib qho tseem ceeb heev rau kev sim tag nrho koj lub tog raj kheej lub taub hau casting kom paub tseeb tias nws tsim nyog tau txais cov nqi kim, ua haujlwm hnyav ua ntej.
Thaum koj tuaj yeem hu rau qhov tseem ceeb siv tau, nws yog lub sijhawm los ntsuas koj lub hom phiaj.Qhov kev tsim no muaj xws li E36-chassis drift tsheb, siv lub Tshuag BMW luv-block, tag nrho pub los ntawm lub centrifugal Rotrex supercharger.Kev siv cov khoom luv luv-thaiv tsim ib qho kev tsis txaus siab me me vim tias qhov qub piston tsis zoo txaus rau kev ua haujlwm VVT tag nrho thaum muaj cov khoom siv loj dua siv rau ntawm kev noj mov.
Rau qhov tsim no peb xaiv OEM loj (35mm) nitrided stainless intake li qub thiab 31.5mm (1mm oversize) Inconel tso li qub;ob leeg nyob rau hauv ib tug keeper groove conversion ntau yam.Ob qhov loj dua VAC Motorsports-sourced Schrick "Forced Induction" camshafts thiab qhov yuav tshwm sim ntawm rev limiter-hnia hauv cov neeg sib tw skid yuav tsum muaj kev tswj xyuas kom zoo.Ib txheej ruaj khov ntawm dual-tus nqi siab valvesprings los ntawm Supertech Performance nrog rau kev sib txuam featherweight titanium retainers tau siv.
Lub S54 siv lub cim-rau-BMW, ntiv tes-follower rocker caj npab mounted ntawm lub rocker ncej.Qhov no muab lub valve qhib acceleration thiab rocker ratio multiplication, tab sis, raws li ib co, tuaj yeem yog ib qho teeb meem hnav.Peb tau pom kev vam meej hauv kev siv WPC Kev Kho Mob ntawm OEM rocker followers, txawm tias qee tus tuaj yeem xaiv rau DLC txheej.
Nrog rau cov khoom nteg tawm, tam sim no peb tuaj yeem mus rau cov npe ntawm cov txheej txheem peb yuav npog hauv lub khw muag khoom.Txawm hais tias tus neeg khiav dej num ntawm S54 yog tag nrho CNC-profileed, muaj cov chaw me me rau kev txhim kho, xws li lub rooj zaum profile thiab lub hnab tsho- caj pas.Qhov chaw nres nkoj tso tawm yog qhov siab tshaj plaws, muab faib, D-shaped venturi, txhais tau tias rau kev tshem tawm ib txwm muaj aspirated, high-RPM siv roj.Profile ua hauj lwm, xws li straightening tus khiav, yuav muaj profits ntawm no.Cov neeg kho tshuab ib txwm muaj kev sib txuas ntawm lub valve los qhia tseem siv tau rau kev hloov hluav taws xob, valve sealing, thiab kev ua haujlwm ntev.S54s valve qhia yuav tsum tau hais raws li xav tau.
Tom qab qhov chaw nres nkoj profileing thiab hnav khaub ncaws, peb saib kom yooj yim du lub combustion chambers 's ntse tooling marks.Peb kuj txheeb xyuas volumetric uniformity nrog ib tug burette.Kev saib xyuas zoo yog yuav tsum tau them rau lub rooj zaum profile, muab qhov nce ntawm qhov loj ntawm lub qhov tso pa tawm.Lub rooj zaum valve ua haujlwm rau ob lub hom phiaj tseem ceeb: txhawm rau tso cua sov tawm ntawm lub valve rau hauv lub tsho dej, thiab muab qhov chaw nres nkoj hloov mus rau lub combustion chamber peb muaj nuj nqis compressed (thiab feem ntau intercooled) cua.
Lub rooj zaum profile tuaj yeem ua raws li nrog tes lapping kom paub tseeb tias lub rooj sib txuas zoo-rau-valve interface.Thaum cov haujlwm valve raug tshuaj xyuas thiab kuaj, cov kauj ruam tom ntej yog deck-milling thiab flange tshuaj xyuas qhov twg cov teb PCD curls "rau thiab cuaj" rau qhov ua kom du thiab tiaj tus.Kev tshuaj xyuas qhov kawg tshwm sim ntawm qhov no ua ntej ntaus lub tshuab ntxhua khaub ncaws.Thaum peb muaj qhov huv thiab tsim nyog, peb lub rooj zaum-kho cov li qub.Peb ua raws li cov chaw tsim khoom cam qhov tshwj xeeb thiab xaus kev sib dhos zaum kawg nrog kev tshuaj xyuas zaum kawg.
Ua ntej peb txiav ib lub nti, peb yuav tsum tau nteg tawm thiab ntsuas tag nrho peb lub hom phiaj.Qhov ntau thiab tsawg ntawm qhov nqus valve yog 35mm thiab 31.5mm feem.Peb lub hom phiaj noj tsawg kawg yog 85-feem pua ntawm qhov 35mm - lossis tsawg kawg yog 29.75mm caj pas txoj kab uas hla hauv hnab tshos ntawm lub rooj zaum thiab qhov chaw nres nkoj.Lub hom phiaj tso tawm yog ze rau 90-feem pua ntawm 31.5mm - lossis 28.35mm - caj pas txoj kab uas hla.
Ntau tus tuaj yeem pom qhov sib txawv ntawm kev saib xyuas rau qhov tso pa tawm hauv daim ntawv thov no;cia qhov no hais txog nws qhov tseem ceeb rau kev ua haujlwm volumetric.Nco ntsoov tias cov engineers hauv Munich tau siv sijhawm feem ntau ntawm kev noj.Peb mounted lub tog raj kheej lub taub hau nyob rau hauv lub Serdi valve lub rooj zaum tshuab thiab siv ib tug convex-radius insert mus nrhiav tau tus ntxhib caj pas txoj kab uas hla.Peb xav tau qhov ntsuas no ua ntej peb xa cov neeg khiav tawm.Nws muab peb lub peev xwm los muab tes sib xyaw cov cim machining lossis seams sab laug los ntawm lub caj pas rotary ntxig ib yam.
Ib qho kev tshawb nrhiav lub rooj txiav pab layout lub caj pas hnab tshos.Txawm hais tias lub caj pas zoo meej yog tseem sib cav, tsis muaj kev sib cav hais tias kev txhim kho nws qhov sib piv yog qhov tseem ceeb hauv kev txhim kho tag nrho cov dej ntws.
Cov theem tom ntej yuav tsum tsis muaj layout kua los yog scribing.Cov chaw nres nkoj nkag tau nteg tawm nrog O-ring groove thiab cov pa tawm yuav tsuas yog cartoonishly loj rau sau ntawv thiab chaw nres nkoj sib tw.Yog li, kev paub thiab kev txiav txim siab yog ob qho txuj ci uas ua rau lub siab khov kho-tes tuag-grinder.
Qhov loj tshaj plaws ntawm chip-making yog D-zoo li ib nrab-lub hli ntawm qhov chaw nres nkoj.Peb zom, ncaj, thiab exaggerate tus D zoo.Tsis pub ntau tshaj li 2 hli ntawm cov khoom tshem tawm ntawm cov phab ntsa chaw nres nkoj yuav tsum txaus rau feem ntau cov ntawv thov tsawg tshaj li 1,100 whp.Cov npoo ntse thiab cov khoom sib faib hauv cov khoom noj tau txais kev sib tw thiab bull-nosing nrog ib qho yooj yim 80-grit cartridge yob.
Thaum profiled, cov pa tau txais 80-grit ua raws li 120-grit.Peb ua raws li nrog qee lub teeb hla-buffing los tsoo qhov kev ntxhib los mos rau kev tswj cov pa roj carbon.Lub combustion chamber tau txais tib qhov ua tiav-massaging raws li qhov tso pa tawm, khob qhov chaw siab thiab cov cuab yeej burrs kom tsis txhob muaj teeb meem ua ntej lossis ci ntsa iab.
Kev nce qib ntawm qhov chaw nres nkoj tso tawm los ntawm chippy mus rau nplua.Qhov chaw nres nkoj tau txais cov khoom siv feem ntau tshem tawm thiab rov ua haujlwm ntawm S54 lub taub hau destined kom pom kev txhawb nqa.
Profiling lub rooj zaum valve yog lwm cov txheej txheem ntau xav txog "kev kos duab tsaus".Nws yog tiag tiag tsis muaj dab tsi ntau tshaj physics thiab geometry.Lub S54's compact 33cc combustion chamber siv 12 hli qhov hluav taws xob feem ntau pom hauv cov maus taus kom haum rau cov lus hais saum toj no.
Nyob rau hauv kev ua raws li cov lus cog tseg, tseem muaj cov ntsiab lus siab-airflow, peb tau xaiv rau ob qho tib si 5-lub kaum sab xis thiab lub rooj zaum radiused cutters, muaj los ntawm Goodson Machine mov.Ob lub cutters muab rau peb nrog kev ua tau zoo 1 hli, 45-degree lub rooj, sib xyaw kom zoo hloov pauv, hauv thiab tawm ntawm lub tais.
Yog tias koj siv cov titanium li qub los yog khiav cov qib siab horsepower, koj yuav tsum xav txog lub rooj zaum tooj liab zoo li Moldstar90 lossis zoo sib xws (ceev faj ntawm carcinogenic, beryllium alloys).Peb ua tiav QC nrog txoj haujlwm txhais tes, siv cov qauv qub, zoo clover compound los xyuas peb lub nplhaib cuam tshuam.Nws kuj tseem muab lub ntsej muag zoo nkauj tawg-hauv lub ntsej muag kom tsis txhob muaj kev hloov pauv loj hauv lub pob valve.
Cov txheej txheem no tsuas yog excel nrog puag ncig thiab tsim nyog clearanced valve qhia.Qhov no yog hais raws li qhov xav tau, feem ntau los ntawm qhov chaw siab heev thiab kev saib xyuas tsis zoo.Daim ntawv qhia hloov tsim nyog yog chav tsev tooj liab-manganese muaj los ntawm Supertech Performance.Nco ntsoov, nyob rau hauv qhov teeb meem no, concentricity yog huab tais.
Yog tsis muaj manifold flange fasteners nyob rau hauv txoj kev, peb muaj peev xwm mus ncaj-ntug thiab board profile qhov kom tsawg thiab tso manifold flanges los ntawm tes.Nws muab ib tug du thiab tiaj tus mating-nto rau lub gasket tshiab ntawm lub tog raj kheej taub hau thiab manifold.Lub tog raj kheej lub taub hau ces tau jigged thiab precision leveled ua ntej peb tshem tawm .002-.003 nti ib-dhau ntawm lub Rottler zeb nrog ib tug PCD ntxig.Qhov no tawm tom qab tus du, MLS- lossis tooj liab-lub taub hau gasket tus phooj ywg, nruab nrab-30s (Ra) tiav.Lub chambers, chaw nres nkoj ntug, thiab sab nraum lawj ntug yog deburred nrog cov ntaub ntawv roj-flute rotary ua ntej tshuab cov chips tawm.
Lub Rottler surfacing tshuab nrog polycrystalline pob zeb diamond tooling tawm ib daim iav-zaj duab xis tiav ntawm lub tog raj kheej taub hau nto.
Lub sijhawm no, cov chip-making ua tiav thiab nws yog lub sijhawm los ntxuav peb cov khoom siv tes ua thiab swarf.Nres huv lossis hnyav - noj los ntawm cov quav cab - thiab cov cua compressed tuaj yeem tshem cov khib nyiab pesky los ntawm qhov chaw nruj.Thaum koj xav tias muaj kev nyab xeeb ntawm cov chaw kaw ntom nti, nws yog lub sijhawm los khiav peb cov ntawv ci txhuas los ntawm lub tshuab ntxhua khaub ncaws.
Ob hom tshuab muab kev tu kom zoo tshaj plaws: kub aqueous high-pressure spray txee los yog ultra-sonic submersion.Hauv peb cov ntaub ntawv nws yog qhov qub uas nws txoj haujlwm zoo li lub tshuab ntxuav tais diav loj heev ntawm steroids.Thaum txhuam los ntawm kev kub siab, kub, thiab me ntsis caustic detergent, cov khoom siv casting tau txais cov dej yaug los ntawm cov hose thiab lub nozzle kom txog thaum cov xab npum seem tau so.Cov kauj ruam no yog ua raws li cov cua compressed kom qhuav cov dej seem seem.
Kev tu kom huv si ua raws li kev soj ntsuam kom pom tseeb ua ntej mock-up yog ib kauj ruam tseem ceeb uas yuav tsum tsis txhob saib xyuas.
Lub taub hau S54 ces raug coj mus rau lub rooj sib txoos huv si nrog lub rooj muag roj hmab muag kom tiv thaiv cov milling zoo los ntawm khawb.Qhov no yog qhov uas ob qho tib si phau ntawv thiab kev paub ua rau peb ntawm txoj kev ncaj thiab nqaim ntawm mise en qhov chaw precision.Peb nyiam nteg lub li qub, lub rooj zaum lub caij nplooj ntoos hlav, lub caij nplooj ntoos hlav, cov khoom tuav, thiab ib qho kev hloov pauv hloov cov xauv uas tau teem rau ntawm lub rooj ntev zaum zoo li qib kev sib ntaus sib tua.Thaum txhua yam nyob hauv nws qhov chaw, nws yooj yim pom dab tsi, yog tias muaj dab tsi, ploj lawm.
Ntawm no koj tuaj yeem pom OEM-qhov loj me ntawm cov khoom siv nrog lawv cov nitride txheej, nrog rau 1 hli loj loj Inconel tso li qub.Tus yuam sij rau cov txiaj ntsig loj ntawm daim ntawv thov tshwj xeeb no yog tau txais cov pa roj tawm sai thiab ua tau zoo li sai tau.
Lub tog raj kheej taub hau mock-up rau kev teeb tsa valve tshem tawm yog kauj ruam tom ntej;koj tuaj yeem kho cov li qub ntawm lub cav yog tias nws haum rau koj.Peb pom tias nws tsis tshua muaj qab haus huv-wracking los hu lub lash nyob rau hauv ua ntej kev cog lus ntawm ib tug clamped taub hau gasket.Nyob rau hauv cov kauj ruam no, peb siv lub teeb yuag kuaj springs nyob rau hauv qhov chaw ntawm tus nqi siab dual springs kom yooj yim ntawm mock-up.Nco ntsoov tias tsis ua raws li cov txheej txheem hloov kho kom zoo yuav ua rau koj hlawv li qub, tsis muaj zog, lub suab nrov valve, lossis lwm yam kev txaj muag.
Schrick Camshafts hu rau lub valve clearance ntawm .25mm (.010 nti) kom tsawg thiab tso pa tawm rau siv nrog lawv cov grinds.BMW hu rau .18-.23mm (.007-.009 inch) thiab .28-.33mm (.011-.013 inch) clearance, nyob rau hauv kom tsawg thiab tso pa raws.Nyob rau hauv haum nrog lub ntsiab lus maus taus, Wiseco ua 8.9mm OD shim cov khoom siv rau Husqvarna, KTM, thiab Husaberg uas kuj haum rau S54: P / N: VSK4.Koj purists tawm muaj tej zaum yuav zoo dua haum rau BMW P/N: 11340031525. Yog hais tias koj (los yog koj tus kws kho tshuab) nyob rau hauv lub pob thaum lub rooj txiav, pib nyob rau hauv nruab nrab ntau yam ntawm shim thickness yuav ua hauj lwm zoo rau koj.
Tsim nyog torque ntawm lub kaus mom cam yog qhov tseem ceeb rau kev teeb tsa lub lash kom raug.Ua qhov no tawm ntawm lub cav tuaj yeem ua rau lub neej yooj yim dua lub cev, thiab thaum ntsib teeb meem, nws tsis xav kom koj tshem lub tog raj kheej lub taub hau los ntawm qhov thaiv.
Lub valve stems tau txais Torco los ua ke lub roj rau ntawm lawv cov stems thiab lawv yog, rov kuaj xyuas kom haum raws li lawv tau swb rau hauv cov lus qhia valve.Lub rooj zaum valve tau ntim rau ntawm sab saum toj ua ntej lub caij nplooj ntoos hlav thiab lub tshuab pneumatic compressor leans rau hauv titanium retainer.Qhov no tshwm sim 23 zaug ntxiv kom txog rau thaum tag nrho cov valves, springs, retainers, thiab locks raug ntsia.
Rocker ncej installation yog tom ntej no, thiab nws yuav tsum tau muab sau tseg tias nyob rau hauv lub S54, lub tso pa rocker ncej muaj ib tug oiling qhov txhais tau tias yuav tsum tau noj los ntawm lub ntsiab roj chav tsev nyob rau hauv lub taub hau.Tsis ua raws li lub qhov kom zoo yuav ua rau lub camshaft tiaj tus thiab cov thwjtim.Cov ntiv tes ua raws li cov ntsiab lus ntawm kev sib cav rau qee qhov uas nquag siv internet;Kuv yuav zam tsis muaj kev sib cav los ntawm qhov yooj yim taw qhia tias muaj peb qhov kev lees paub ntawm tus ntiv tes rau siv nrog cov camshafts loj dua thiab kev ua haujlwm siab RPM: Schrick Performance DLC cov thwjtim (P / N: SCH-CF-S54-DLC), DLC coated OEM BMW followers (P/N: 11337833259, hu rau Calico Coatings) los yog WPC kho OEM BMW raws (P/N: 11337833259, hu rau WPC Kev Kho Mob).
Cov WPC-kho cov ntiv tes no yog microtextured rau cov roj tuav thiab impregnated nrog WPC cov khoom sib xyaw ntawm cov hlau-kho qhov chaw.
Tsav Lubricants ua ib qho zoo heev, tacky camshaft thiab lifter roj;nco ntsoov siv qhov no liberally rau lub lobes thiab ntiv tes ua raws lub ntsej muag.Nco ntsoov siv lub tshuab sib xyaw ua ke rau lub camshaft bearing nto thiab cov ntawv sau ua ntej txhim kho lub kaus mom thiab txiv ntseej.Lub torque specs thiab kev txiav txim yog nyob ntawm koj, vim tias yog tias koj ua qhov no, koj yuav tsum muaj phau ntawv nrog cov ntaub ntawv ntawd.
Cov lej lej qhia tias peb yuav nce 2-2.5 psi rov qab los ntawm kev hloov pauv ua pa rau lub tog raj kheej lub taub hau.Nyob rau hauv kev npaj rau kev nce volumetric efficiency, peb muaj loj rau-rib lub ntsiab pulleys txiav tawm ntawm hlau thiab ces zinc coated rau oxidation kuj.
Thaum kawg, MAP sensor tau qhia tias muaj zog 3 psi nce, ua rau Rotrex blower nce siab ntawm 14.5 thiab 17 psi, nyob ntawm qhov chaw txhua hnub.Kev mus ncig rau Rotrex Impeller ceev lub laij lej qhia tias peb yuav tau tsav me ntsis dhau peb C38-92 impeller.Kev txhim kho ua pa ua ke nrog lub ntsiab rub tawm tau txais txiaj ntsig ntawm 156whp thiab 119 lb-ft ntawm torque.
Muaj ntau lub zog horsepower yuav tsum tau paub nyob rau hauv feem ntau cov cav tov, txawm tias cov uas pom tau tias nyuaj heev los yog kim.Qhov tseeb kos duab yog nyob rau hauv kev nrhiav qhov pib ntawm kev txo qis rov qab rau hauv txhua qhov system, ua ntej ntsib cov phab ntsa nrog cov sijhawm thiab nyiaj txiag.Kuv vam tias yuav rov qab mus rau lub ntsiab lus ntawm airflow thiab yuam induction nyob rau hauv cov ntsiab lus ntawm niaj hnub inline sixes nyob rau hauv lub neej yav tom ntej.Thaum lub sijhawm ntawd los, nws yuav nrog cov ntaub ntawv ntau ntxiv los qhia rau koj.
Ua pa zoo ua rau cov nees loj dua.Qhov ntawd yog radically txhim kho lub zog nkhaus rau me ntsis ntxiv boost thiab ntau npaum li cas lub tog raj kheej taub hau.
Tsim koj tus kheej cov ntawv xov xwm kev cai nrog cov ntsiab lus koj nyiam los ntawm Turnology, ncaj qha rau koj lub inbox, DAWB kiag li!
Peb cog lus tias yuav tsis siv koj qhov chaw nyob email rau txhua yam tab sis tshwj xeeb hloov tshiab los ntawm Power Automedia Network.
Post lub sij hawm: Jun-12-2020