All technical documents contained here are the sole property and copyright of Jim Wolf Technology, Inc. They are expressly and solely provided for use by JWT customers who have been specifically advised by JWT to access this material as part of an installation or tech support issue with thier JWT products. This material is incomplete and may contain errors or out of date information and should not be used without first contacting JWT's tech support department.

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Spreadsheet showing the injector pulse width vs fuel pressure for the JWT TT FMU.

JWT G35 TWIN TURBO KIT INSTALLATION MANUAL (5 MEG FILE)

JWT 350Z TT INSTALLATION MANUAL (5MEG FILE)

Z32 JWT BB530 TURBOCHARGER UPGRADE INSTALLATION

A SIMPLE TEE BLEED BOOST CONTROL TO RAISE BOOST A FEW POUNDS.

How to install a manual high/low boost switch on a Z32

GARRETT TURBO CAT. JWT IS AN AUTHORIZED GARRETT ENGINEERING HOUSE.

Z32 SPORT 600 & 650 TURBOCHARGER UPGRADE INSTALLATION

JWT ADJUSTABLE CAM SPROCKETS SR20 INSTRUCTIONS

CAMSHAFT INSTALLATION FOR QR25DE

VK56 CAMSHAFT INSTALLATION ADDENDUM TO FACTORY MANUAL.

This worksheet can be used to calculate which bucket followers you may need during a cam change or head modification. Also included is a fairly complete survey of all Nissan & Infiniti follower part numbers that will fit most VQ, VK, & QR engines. It is strongly advised to choose followers with a DLC (Diamond-like carbon) wear surface in all performance applications. DLC followers are denoted with an * and are available in all thickness.

JWT adjustable VQ exhaust sprockets can be used by engine builders to acheive precise exhaust cam timing or eliminate exhaust cam phaser if needed. These instructions show only a basic understanding of how to position them, it is up to the engine builder to position them correctly for the intended end result.

VQ37 JWT SPRING COMPRESSOR ADAPTOR - FOR

USE WITH JWT AVQ35-SPCOMP SPRING COMPRESSOR : INSTRUCTION SHEET

Clearancing the cylinder head for clearance of the #1 intake lobe is required for JWT C1 Cams on QR25DE engines. Here is how to do this if the head is assembled.

What a lot of very good engine builders unfortunetly  learn the hard way. A must read for all serious engine builders!

JWT VK56 Camshaft profiles for both intake cam phaser (2007+) and non-phaser (pre-'07) engines.

QR25DE CAM SPEC CHART

JWT SR20 Camshaft Spec. includes FWD, RWD, hydlaulic & mechanical cams.

VIDEO: This is the 1st dyno run on a stock internals VK56 with JWT C8 Cams and ECU. 400+ WHP on 91octane. Very fun car!

VQ Heads must be clearanced to allow the cam lobes to clear when running the high lift JWT C9, C10, C11, C12 Cams

This worksheet details some of the variables to be aware of when combining VQ30 and VQ35 engine parts for various reasons

JWT VQ CAM SPECS CARDS

USE THIS TO IDENTIFY VQ35 CAMS BY THE REAR ENCODER.

For VQ35HR race engines running higher than original rev limiters, it is highly recommended to use the longer 75mm sprocket bolt 13012-9N00A. This modification eliminates the torsional shear forces on the front journel by locating the bolt threads aft of the oil groove. This was also a production update in 2010. If your bolt has a "N" on the head it already has the long bolt update.

VG30DE AND VG30DETT JWT CAMSHAFT SPEC. CARDS

Hardware kits required to use JWT RWD VQ cams in FWD engines.

INSTALL MANUAL FOR AVQ35-IPLOC VQ35DE INTAKE CAM PHASER LOCK KIT. ALSO INCLUDES INSTALL MAN. FOR OPTIONAL VG30DE CAS ADAPTOR FOR VQ35DE

If you have Codes P0021 or P0011 after assembling your engine, you need to recheck the cam timing. This template set must be printed without any rescaling, check your print driver and Acrobat for any rescaling options and turn them off. Cut out the templates and place them on the intake gears as instructed.

VG30DE(TT) VALVE SPRING COMPRESSOR TOOL - INSTRUCTIONS

To determine if a lack of clutch disengagment is caused by the hydraulic system (pedal, master & conentric slave) or a problem with the clutch itself, you must first determine if the release bearing has enough movement to disengage the clutch as expected.

INSTRUCTIONS TO SETUP A JWT CONCENTRIC SLAVE CYLINDER WITH A JWT 6 SPD ADAPTOR KIT

INSTALLATION MANUAL FOR JWT CONCENTRIC SLAVE CYL. L3507-CSC00

VQ RWD vehicles with C.S.C. must have a clutch finger to crankshaft distance of no less than 80mm to avoid over extenting the C.S.C.

350Z - G35 CONFIRMING CORRECT FLYWHEEL CLOCKING TO CRANKSHAFT

VQ RWD vehicles with C.S.C. must have a clutch finger to crankshaft distance of no less than 80mm to avoid over extenting the C.S.C.

JWT QR25DE FLYWHEEL INSTALL INSTRUCTIONS

VQ RWD vehicles with C.S.C. must have a clutch finger to crankshaft distance of no less than 80mm to avoid over extenting the C.S.C.

JWT 350Z, G35, 02+MAXIMA, ALTIMA FLYWHEEL INSTALL

To identify a replacement heat shield for older JWT Flywheels, use this dimension chart for the critical dimensions. Try to be as accurate as possible.

If you are installing an aftermarket release arm Pin-Ball (pivot ball) with your new clutch, be sure to use the correct part for your car. Installing a pin-ball of the wrong height can cause damage to the clutch. This sheet shows the production dates, lengths and Nissan part numbers along with associated parts to confirm the correct parts are being used.

Nissan M6 6-speed transmissions used on 350Z, 370Z, G35 & G37 look similar externally but have 3 diameter changes in the input bearing, making cases non-interchangable between the 3 types (CD0, CD5 & CD8).

280Z and Z31 550HP ECU /injector/ MAF upgrade inst.
Instructions for upgrading to the JWT 550HP+ control system.

The stock fuel rail is capable of very high flow (600HP+) in either dead head or return setups, provided the restrictors are opened to 6mm.

300ZX TT 90-94 and non-turbo 90-93 fuel injectors have a high failure rate as explained here.

Drilling out stock injectors to cause a higher flow rate is a great idea in theory, but when done poorly, can cause the lose of an expensive performance engine. We do not recommend these over new manufactured injectors, based on the large number of drilled injectors we receive for testing that are not even close to the precision required in an expensive performance engine. We have included here a few examples of injectors that had been drilled and sold to customers that had sent them in for flow testing. View the samples and if you still choose to go this route, do your own visual inspection and flow test before betting your engine! The state of this process is evolving and we will continue to revisit the subject, if thing improve.

When more than 1 data logger is recording at differant sample rates, time syncing the data can be done in Excel this way.

Consult data logging format for test data being reviewed by JWT.

All fuel injectors take a certain amount of time to open and close. The opening and closing time of an injector must be known before a tuner can properly program the ECU. Using a Nissan detonation sensor mounted to an injector on a flow test bench, and a dual channel scope with channel 1 monitoring the injector current and channel 2 monitoring the detonation sensor, you can be easily determined.the injector latency or invalid time.

WIRING A 90-96 300ZX MASS AIR SENSOR INTO OTHER NISSAN CONTROL SYSTEMS.

WIRING A FORD 93 COBRA MUSTANG OR 2001+ LIGHTNING MAF SENSOR INTO NISSAN VEHICLES

350Z ECU WIRING DIAGRAM FOR 2003-04

GUIDE FOR BORING CYLINDERS TO FIT SPECIFIC JWT PISTONS.

350Z / G35 (AND OTHER VQ35DE ENGINES) OIL PAN SPACER KIT TO INCREASE OIL CAPACITY TO 6 QT

VQ35 / VQ37 coolant flow and head gaskets had not been optimized until the VQ35HR in 2007. The 3rd gen. HR head gaskets & head bolts are an excellent choice for boosted and race VQ35DE engines. Flash boiling in head on boost and head lifting due to poor circulation paths in 1st and 2nd gen gaskets are signifigantly improved with the 3rd gen HR gasket design. 3rd gen. gaskets also incorperate a .1mm thick fire ring preload shim in between the gasket plys, for additional combustion sealing. Also recommended on sleeved engines with flushed (not .002-.003" proud) sleeves to avoid lose of combustion seal as sleeves settle. Use HR high tension TTY bolts in DE builds to increase clamping force and avoid cylinder destortion and uneven clamp loads associated with some non-TTY stud options.

Sensors and devices designed to sense detonation need to be calibrated around the natural frequency of the engine assembly being sensed. This is an FFT of the dominate frequencies for a VQ35DE. Depending on external noise, one may be cleaner than the others, but this is the starting point.

If you have a VQ37 that has a coded with DTC P0340 or P0345, it is possable that the encoder ring on the cam gear slipped. This is hard to discover as there is no specs for this in the factory manual.

JWT  MSER1-10000 MOTOR MOUNT KIT 91-99 5SPD SR FWD

QUICK LOOKUP CHART SORTED BY MODEL VS. CHASSIS AND CHASSIS VS MODEL

G37 & 07+ G35(HR) Dual Pop-Charger Intake Syst. installation instructions.

POP-CHARGER CALIFORNIA AIR RESOURCE BOARD EXECUTIVE ORDER

POP-CHARGER G35 INSTALLATION INSTRUCTIONS

POP-CHARGER AIR FILTER CLEANING INSTRUCTIONS

INSTALLATION MANUAL FOR THE 2007+ 350Z POP-CHARGER DUAL INTAKE

Pop-Charger CARB EO D-244-7 replaces all older EOs upto model year 2008 and some 2009

370Z DUAL POP-CHARGER INSTALL MANUAL

This is CARB E.O. for JWT Pop-Charger Air Filter Systems to 2010.