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Pro-Flo EFI  Installation  Instructions

©2008 Edelbrock Corporation

Brochure No. 63-3527

Catalog #3527, #3528
Rev. 8/08 - AJ/mc

TABLE OF CONTENTS

Part #3527 and #3528

Introduction.................................................................................................................................................1

Components................................................................................................................................................2

Preliminaries...............................................................................................................................................3

Fuel System ................................................................................................................................................6

Induction System ......................................................................................................................................10

Sensors ....................................................................................................................................................13

O2 Sensor Installation ...............................................................................................................................15

Main System Harness ...............................................................................................................................16

Ignition System .........................................................................................................................................25

Other Applications.................................................................................................................................... 26

Software Installation .................................................................................................................................28

Calibration Selection .................................................................................................................................29

System Start-Up........................................................................................................................................30

Electronic Engine Management .................................................................................................................33

Pro-Flo Quick Tuning Guide.......................................................................................................................34

Calibration Module Flowchart ....................................................................................................................36

Parts and Part Numbers ............................................................................................................................37

Service & Warranty ...................................................................................................................................39

INTRODUCTION

Thank you for selecting the Edelbrock Pro-Flo XT Fuel Injection System.  This Multi-Point Fuel Injection System has been designed for 350 c.i.d.
small-block Chevrolet engines, and is designed to provide excellent performance, fuel economy, and maintenance-free operation.  Installation of
the Edelbrock Pro-Flo XT Fuel Injection System involves modifications to the fuel system, ignition system, induction system, and possibly the
valve train.  Although there are steps that must take place before others, the modifications do not necessarily have to be performed in a particular
order.  Each modification is described in a separate section in this manual.  Please study these instructions carefully before beginning installation
of any part of the Pro-Flo XT system.

If you have any questions, do not hesitate to call our 

EFI Technical Hotline at (800) 416-8628, 7am-5pm PST, Monday-Friday

E-mail:  [email protected]

Summary of Contents for PRO-FLO XT 3527

Page 1: ...em This Multi Point Fuel Injection System has been designed for 350 c i d small block Chevrolet engines and is designed to provide excellent performance fuel economy and maintenance free operation Installation of the Edelbrock Pro Flo XT Fuel Injection System involves modifications to the fuel system ignition system induction system and possibly the valve train Although there are steps that must t...

Page 2: ...air valve Coolant Temperature Sensor CTS Main system harness Throttle Position Sensor TPS integrated with air valve Fuel pump harness Oxygen O2 sensor Installation package USB Serial Converter Ignition Harness Software CD MSD Blaster Coil Mallory Distributor Many Pro Flo XT components including the Manifold Absolute Pressure sensor fuel pressure regulator Coolant Temperature sensor and the fuel fi...

Page 3: ... Block Chevy V8 firing order 4 Check all threaded manifold holes 5 Check all internal manifold passages with a light and wire making sure they are clean and unobstructed 6 Check automatic transmission shift points before removal of your stock manifold and adjust linkage after Edelbrock manifold installation for same shift points if needed NOTE We recommend that you refer to this checklist again af...

Page 4: ...od clearance figure to determine new hood clearance CAUTION You must maintain at least 1 2 inch clearance between the hood and manifold because of engine torque If you have insufficient clearance a hood scoop may solve the problem EMISSION CONTROLS The Edelbrock Pro Flo XT system will not accept stock emissions control systems Check local laws for requirements before installing the Pro Flo system ...

Page 5: ...ed Incorrect shift points can result in transmission damage ENGINE CLEANING Edelbrock recommends that the Pro Flo XT system be installed on a clean engine in order to prevent dirt from falling into the engine lifter valley or intake ports 1 Cover ignition Use engine degreaser and a brush to thoroughly clean the manifold and the area between the manifold and valve covers 2 Rinse with water and blow...

Page 6: ...d the fuel pump to allow fuel to be pushed through the filter rather than drawn through Electrical connectors should face the front of vehicle Make sure the fuel pump is mounted at or below the bottom of your fuel tank If the pump is mounted above this point fuel pump failure will occur FUEL PRESSURE REGULATOR AND FUEL SUPPLY LINE Fuel pressure is as important as fuel volume particularly in fuel i...

Page 7: ...o 63 3527 Catalog 3527 3528 Rev 8 08 AJ mc BULKHEAD FITTING METHOD Drill a 9 16 inch hole in the sending unit plate adjacent to where the main line enters the tank This will be the hole for your return line Insert a 6 AN bulkhead fitting available at most radiator shops into the hole the narrow end of the fitting on the inside of the plate Apply a rubber washer or RTV sealant and fasten the fittin...

Page 8: ...he hard line should extend through the hole 1 to 2 inches on the outside of the plate On the inside of the plate the hard line should follow the contours of the fuel pickup line Bend the end of the return line away from the sock on the end of the fuel pickup line Solder or weld the return hard line to the fuel pickup line 8 Pro Flo EFI Installation Instructions 2008 Edelbrock Corporation Brochure ...

Page 9: ...een the tank and the fuel filter as low and as close to the fuel tank as possible The pump is directional Electrical connectors should face the front of vehicle The fuel pump needs to be at or below the bottom of the fuel tank 8 Mount the fuel filter between the fuel pump and the engine 9 Re install the modified sending unit plate to the clean fuel tank 10 Reinstall the fuel tank 11 Attach the pri...

Page 10: ...pable of flowing 29 lbs hr at 50 psi The injectors mount directly onto the manifold one at each port for fuel delivery that is precisely controlled and instantaneously injected FUEL RAILS The extruded aluminum rail assembly routes the high pressure fuel to the injectors Aluminum rails have an advantage over soft rails both in terms of style and safety ASSEMBLING PRO CLASSIC HOSE Step One Cut hose ...

Page 11: ...alve cover bolts for manifold removal and replacement It may be necessary to replace valve cover gaskets if broken to prevent oil leakage PORT SURFACE CLEANING When cleaning old gaskets from head surfaces lay rags in the lifter valley and stuff paper into the ports to prevent pieces of the old gasket from falling into ports and combustion chambers When clean remove paper making sure that all parti...

Page 12: ...ilicone Gasket instead of end seal gaskets Apply a 1 4 inch thick bead of sealant across each end seal surface overlapping the intake gasket at the four corners NOTE Use the recommended silicon sealer Others may damage the O2 sensor This method eliminates end seal slippage and deterioration For ease of installation we recommend using Edelbrock Manifold Bolt and Washer Kit 8564 6 Apply Edelbrock Ga...

Page 13: ...sensor mounted on the intake plenum converts air pressure load in the manifold to an analog signal sent to the ECU For more information on Manifold Absolute Pressure refer to the section on Speed Density Electronic Engine Management MANIFOLD AIR TEMPERATURE SENSOR The Manifold Air Temperature sensor is a thermistor device which measures air temperature This sensor must be installed in the air inta...

Page 14: ... sensor is the range over which the sensor is accurate A narrow band sensor is basically a switch that only tells the ECU if the air fuel ratio AFR is richer or leaner than 14 7 to 1 A wide band sensor controller typically has a linear voltage output that is accurate over a range of 10 to 20 1 AFR The included wideband sensor calibration is for use with the Dynojet Wide Band Commander Air Fuel Rat...

Page 15: ...nd within reach of the harness connector Check to ensure adequate clearance for the sensor taking into consideration engine movement 3 Fit the provided fitting into the hole in the exhaust pipe and weld into place 4 Once it has been welded into place clean the threads in the center of the fitting If your exhaust is coated tap bung threads to ensure a good ground for the 0 2 sensor 5 Thread the O2 ...

Page 16: ...16 Pro Flo EFI Installation Instructions 2008 Edelbrock Corporation Brochure No 63 3527 Catalog 3527 3528 Rev 8 08 AJ mc ENGINE HARNESS LAYOUT ...

Page 17: ...o EFI Installation Instructions 2008 Edelbrock Corporation Brochure No 63 3527 Catalog 3527 3528 Rev 8 08 AJ mc MAIN SYSTEM HARNESS This diagram illustrates the chassis side of the Pro Flo XT Main System Harness ...

Page 18: ...18 Pro Flo EFI Installation Instructions 2008 Edelbrock Corporation Brochure No 63 3527 Catalog 3527 3528 Rev 8 08 AJ mc ...

Page 19: ...o EFI Installation Instructions 2008 Edelbrock Corporation Brochure No 63 3527 Catalog 3527 3528 Rev 8 08 AJ mc MAIN SYSTEM HARNESS This diagram illustrates the engine side of the Pro Flo XT Main System Harness ...

Page 20: ...20 Pro Flo EFI Installation Instructions 2008 Edelbrock Corporation Brochure No 63 3527 Catalog 3527 3528 Rev 8 08 AJ mc ...

Page 21: ...cient clearance from any exhaust piping or other hardware is available BEFORE drilling NOTE Start the screw holes with a pointed punch or small drill 3 Mount the plate so that the large coarse threads protrude through the hole in the firewall into the engine compartment The square mounting pad should be on the cabin side of the firewall Use RTV to seal the plate to the firewall 4 The engine harnes...

Page 22: ...rness J2 Customer Interface O2 Sensor Select J4 Distributor RT2 12v Starter Permanent Power J1 Firewall Bulkhead Connector J6 Ignition Coil CHASSIS HARNESS J3 Firewall Bulkhead Connector J7 Calibration Module J8 PC Interface Main Relay Fuses J1 Main ECU Connector J2 Main ECU Connector BULKHEAD CONNECTOR Engine Harness Chassis Harness Mount plate to cabin side of firewall 12v Switched Power ...

Page 23: ... sensor attaches to the harness with Connector J16 The Throttle Position sensor attaches to the harness with Connector J5 The Idle Air Control solenoid attaches to the harness with Connector J20 THROTTLE CABLE INSTALLATION The Pro Flo XT manifold includes a universal throttle cable bracket that will simplify many installations The Pro Flo XT system is only compatible with throttle cables applicati...

Page 24: ...connector on left end as drawn of this 10 foot fuel pump wiring harness attaches to the Main System Harness The two connectors on the right connect to the positive and negative terminals on the fuel pump A sleeve and tie wrap are provided to fit over the positive terminal once the connector is installed This sleeve prevents the clamp from shorting the fuel pump terminals BLK ORN 10 BLK ORN B A The...

Page 25: ...there is power with the key on and also while cranking REFER TO VEHICLE REPAIR MANUAL FOR WIRING DIAGRAM IF NECESSARY ELECTRONIC CONTROL UNIT SYSTEM ECU The Electronic Control Unit ECU must be mounted away from moisture excessive heat or vibration Underneath the dashboard on the passenger side or behind the glove box are recommended locations Use the supplied bulkhead connector to connect the engi...

Page 26: ...ro Flo XT system is installed will match this baseline combination The system can be used with similar applications as long as the necessary fuel calibration adjustments are made If your Small block is not a 350 does not have headers and uses small valve style cylinder heads such as Chevrolet aluminum HO heads with 1 94 inch valves it may require additional tuning adjustments For further informati...

Page 27: ...s G Oil Press Oil pressure sensor input to ECU Use with VRef and Sensor Gnd Recommend Edelbrock P N 36011 0 100 psig pressure sensor H Fuel Press Fuel pressure sensor input to ECU Use with VRef and Sensor Gnd Recommend Edelbrock P N 36011 0 100 psig pressure sensor I Batt Pos Fused switched power source 1 amp max J TPS Throttle position sensor signal Can be used with aftermarket automatic transmis...

Page 28: ... programmed with the 3560 calibration file If your application uses the 3560 calibration according to the table on the next page you do not need to load a new calibration To install the software load the supplied CD into your PC s CD drive The installation routine should auto run Follow the onscreen prompts to install the software eFlash is a stand alone system that can be used to load calibration...

Page 29: ...tarting with the correct calibration file will reduce the amount of tuning needed NOTE Edelbrock recommends a minimum of 112 for intake lobe seperation angle on all Pro Flo EFI applications A value less than this may make tuning more difficult depending on the intake duration The calibration files are saved in folders identified by kit part number Double click on the folder with your kit part numb...

Page 30: ... ARROW key once to display NOTE The water and air temperatures displayed will vary depending on ambient conditions The system voltage will vary depending on the condition of the battery 3 Move the throttle to test the Throttle Position Sensor TPS The TPS reading should vary depending on throttle angle 4 If the calibration module goes blank while cranking the system is losing power Check the Pink B...

Page 31: ...wrong Setting Base Spark Advance Use a timing light and the Pro Flo Calibration Module to accurately set timing 1 Start the engine 2 The Calibration Module screen will display this screen 3 Press the DOWN ARROW key once to reach this screen 4 Press the ENTER key to display this screen 5 Press the UP ARROW key six 6 times until the module displays this screen 6 Press the ENTER key Press either ARRO...

Page 32: ...hanical stop screw so that idle speed in park neutral is 50 100 RPM higher than you want the engine to actually idle in gear with the idle control turned on Typically 600 1000 RPM depending on the installed camshaft We find 650 RPM a good idle for our 3512 with Performer Plus camshaft calibration Set Idle Fuel Modifier and Idle Spark Modifier Using the calibration module Select MISC MODIFIERS and ...

Page 33: ... engine operating point RPM and Load factor it uses tables programmed into it to instantly calculate correct spark advance and injector pulse width The Pro Flo system displays vacuum rather than the less familiar manifold pressure This vacuum reading is based on the following SAE standard atmosphere Barometer 29 5 in Hg Temperature 77 F Because of this the vacuum figures displayed on the Calibrati...

Page 34: ...een noted and the amount of fuel required to achieve smooth operation has been noted at each problem area you may now do each adjustment one at a time to achieve a complete tune up To input this information you will need to make sure the Closed Loop Fuel is in the OFF position Go to each area and enter the information If you have found a problem that is not exactly in the center of one of the fuel...

Page 35: ...itor can only be used to edit the calibration file loaded in the software You cannot directly edit the calibration file loaded into the ECU When you make changes to a calibration file it must be saved and flashed into your ECU s memory before those changes take effect For additional information on using System Editor to edit your calibration files refer to the online help by selecting the Help men...

Page 36: ...36 Pro Flo EFI Installation Instructions 2008 Edelbrock Corporation Brochure No 63 3527 Catalog 3527 3528 Rev 8 08 AJ mc CALIBRATION MODULE DIAGRAM ...

Page 37: ...nsor Edelbrock 36013 High pressure fuel pump Edelbrock 3594 Fuel filter Edelbrock 3596 GM 25055065 Fuel pressure regulator Edelbrock 3584 GM 17107010 Fuel injectors set of eight Edelbrock 3853 Fuel injectors one Edelbrock 3583 Calibration Module Edelbrock 3519 Calibration Module Cord Plug Edelbrock 3571 Idle air control solenoid Edelbrock 36015 Throttle Cable Bracket Edelbrock 38 0121 Many of the ...

Page 38: ...il 1 1 4 pipe plug 1 3 8 pipe plug 4 1 4 washer 15 6 fuel return line 5 6 hose end 1 90 elbow fitting 1 Fuel crossover line 1 Fuel filter clamp 1 1 4 pipe to 3 8 hose fitting 1 Return line adapter 1 Throttle body gasket 15 6 fuel line 15 11 32 PCV hose 1 PCV valve 1 Std 1 4 inch Schrader valve 5 1 4 20 x 1 25 socket head capscrew 4 1 4 20 x 1 socket head capscrew 1 AC adapter 1 ECU 1 Calibration m...

Page 39: ...d at 2700 California Street Torrance CA 90503 Customers requiring warranty assistance should contact the dealer from whom they purchased the product In turn the dealer will contact Edelbrock and we will determine the method of satisfying the warranty Should Edelbrock determine that the product be returned to the factory it should be accompanied by proof of purchase and a clear description of the e...

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