Our 1251bhp 6 speed MKIV Supra still has a bit of a strange issue but can we get to the bottom of it?

We chase a boost leak on numerous parts and replace and improve another few items on the car.

#suprabuild #mkivsupra #6speedmanual

1994 Toyota Supra MkIV 6 Speed Manual J-Spec RZ,1251bhp-Racecal Tuned

Syvecs S6GP ECU,antilag, boost by gear, flatshift,Syvecs traction,Syvecs port expander, custom Racecal/Syvecs Raychem loom, Syvecs individual cylinder knock control, Syvecs 4 bar map sensor, Syvecs wideband sensor, Syvecs oil pressure sensor, Syvecs fuel sensor, Syvecs Bluetooth module,R35 GTR coilpacks,Canton 4L Accusump Kit with remote low oil pressure sensing operation, Tomei gated sump, Real Street Performance Billet Main caps with ARP CA625+ main bolts, 10:1 c/r, Induction Performance custom Diamond HD+ forged pistons (86.5mm)9.3:1 with Uprated 0.225” H13 HD wrist pins and diamond moly coated skirts, BC ProH625+ Con Rods+uprated ARP CA625+ rod bolts, New crankshaft+micro polishing, PHR 2JZ Timing Belt Drive Gear,ARP CA625+ head studs,ACL bearings,PHR modified oil pump,PHR oil feed kit,PHR oil drain kit,Syvecs oil pressure sensor,Syvecs IAT sensor,Syvecs fuel pressure sensor,Syvecs water temp sensor,PHR shifter bushings,PHR Power Steering Res Kit,ATI super damper crank pulley,PHR V3 Billet Power Steering pump fitting,Mishimoto power steering cooler,Whifbitz Billet Race Port Intake Manifold +90mm Bosch drive by wire Throttle Body,
Xcessive Manufacturing JZA80 Power Steering Pump Brace/Air Con Delete,Gates small belt,Real street billet timing belt tensioner,PHR Modified 2JZ Timing Belt Drive Gear,PHR Billet race valve covers with-12AN ports,OEM MLS steel head gasket,OEM Timing belt,Gas flowed Cylinder head with pocket port/5 Angle valve job and exhaust side race port,Ferrea Competition Plus in/ex valves,GSC Beehive springs & titanium retainers,Brian Crower Stage 3+ race spec cams, Ferrea race valve guides,Ferrea valve seat locators,Supertech Viton valve stem seals,Titan Motorsport custom adjustable cam gears,BC ARP Cam gear bolts(exhaust and inlet),Custom 3-inch exhaust system(with 3” stubby race bonnet vented exhaust for VMAX/Half mile/race runs),K&N filter,custom intercooler piping,Tial 60mm blow-off valve,ETS (6”) intercooler,PHR Uprated waterpump,Mishimoto X series 3 row radiator with TRD 1.5 bar rad cap,TRD race thermostat,Uprated Scmitz 130amp Alternator, Whifbitz Carbon fibre bits-carbon fibre cooling plates,Carbon fibre coilpack covers,Carbon fibre upper and lower engine end covers,Greddy clear lexan cam gear cover,Billet greddy oil cap, Greddy Lightweight accessory pulley set,Greddy Kevlar timing belt,PHR Kelvar accessory belt, Solid PHR engine mounts,Mishimoto 32 row oil cooler,PTE 6870 GEN 2 Comp spec Forged Billet wheel Dbb turbo with Zircotec heat coated exhaust housing 0.97 AR, PHR exhaust coat,SP F1 V2 twin gated T4 heat-coated exhaust manifold,2 x Tial MVR 44mm wastegates,Twin Walbro “Hellcat” E85 Walbro 480LPH Fuel pumps in PHR Triple pump hanger,AN10 fuel feed lines,AN10 return Custom PHR dual feed Fuel Rail,6x ID1300 injectors,Aeromotive fuel pressure regulator,Aeromotive fuel filter with high flow filter medium,Funk Motorsports Reflecta-gold anti heat tape and various anti heat covers throughout

Driveline
Factory Getrag V160 6-speed gearbox with PHR Billet shifter bushings,Os Giken lightweight flywheel,OS GIKEN R3C triple plate Clutch, OS GIKEN push/pull converter kit,Clutch switch valve controlled by engine management for launch control and anti-lag,PHR single piece driveshaft, TRD 2 way limited slip differential with TRD Diff fitting kit,TRD Transmission mount,PHR Solid diff mounts,Superpro Poly diff Ear mounts,PHR solid subframe mounts

Suspension/Brakes
Specially Made/modified Robispec KW V3 with stiffer aftermarket bespoke Fawkner custom springs, Fawkner uprated metal collar seats, custom Tein pillow ball upper mounts, Full R2 Poly bushes all round, Whiteline adjustable heavy duty sway bar end links, Cusco Carbon fibre front upper strut brace, Cusco Rear upper Aluminium Strut brace, Cusco 32mm front anti roll bar with poly bushes and rear ARB , Stoptec 338mm front BBK with Carbotech XP-10 brake pads, K sport 332mm BBK with Ferrodo Race pads


Wheels/Tyres
Enkei Tuning Raijin ultra-lightweight alloys, 18×9-inch front and 18x10rear, Nankang AR1

Exterior
Whifbitz Carbon Fibre Intake light, Standard front bumper with RMM front lip, TRD side skirts, TRD rear spats with stock rear bumper, factory JZA80 rear wing, custom indicators integrated, APR carbon fibre wing mirrors
Ridox V5 race front aero undertray, Do-Luck lower Carbon fibre rear diffuser

Interior
Cusco Safety 21 FIA 8 point roll-cage, Passenger and Drivers Sparco Pro Club racer FIA 4 point harnesses, Sparco FIA sprint 5 seats, Momo trec steering wheel, Sparco seat belt pads, Carbon3 Port Pod

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