The tbi throttle body injection is basically a big carb with two big injectors inside that inject fuel. Many grand prix from these years use the g4 adapter. If you have access to a scan tool use a hook up for a 1990 350 cu. Preoptispark small block chevy v8s with tpi or tbi injection and hei ignition with electronic spark timing seven or eight pin hei module much of this article will apply to other 1980s era gm cars including injected big blocks and even fire v6s. Fuel injection conversion using a gm tbi efi system. How to diy prom chip tuning for obd1 chevy gm throttle. Each unit is completely flow bench tested and ready for easy installation. Ok so i have a 94 sierra with a 350 cubic inch tbi.
I could never get it to run right and when i called affordable fuel injection the guy told me my new motor gm 350290 crate was a terrible motor and his system would not work well. Throttle body spacer helix bore tbi 8795 chevy gmc 1500 5. Were allocating dedicated blocks of time for product development. Tbi chips has a good rep and you only other option is to learn to burn chips yourself.
I have a 94 siverado 4x4 do they make aftermarket headers for these. Basic connections are standard but it is easy to customize one for your needs. In this video i will show the equipment needed for do it yourself prom chip tuning. A rule of thumb is to stay away from those off the shelf stage1 and stage 2 chips.
The block learn feature will help tune it as you drive it. Edelbrock performer small block chevy intake manifold for 198795 cast iron heads. Therefore,since it is not reading the af ratio you may need more or less fuel for maximum power. Pictured is afis optimum series tbi complete system for a chevy v8. This smallblock v8 is one of gm s most modifiable motors and can be altered to provide extra horsepower without having to undergo a major overhaul or rebuild.
We have designed a custom cnc adaptor that bolts on the tbi intake so we can bolt on. New tbi controller flash memoryno more chips laptop programable. Hello, my name is brian harris and i have been modifying fuel injected vehicles since 1995 and moved to programming the fuel injection since 1999. Chevrolet optimum series tbi kit affordable fuel injection. The process for tuning obd1 gm products is pretty much the same for all 8693 model years. New tbi controller flash memoryno more chips laptop. Then you need to either buy a tbi intake for vortec heads, or an adapter plate holley makes one to fit the stock tbi onto the vortec intake.
The tbi unit used for the project is simply a salvageyard part scavenged from any of the millions of gm trucks built from the mid1980s through the. There are a variety of aftermarket parts available to. Most tbi s are in stock and ready for quick delivery. This tbi adjustable regulator is needed for stock and modified gm tbi engines. Werent all the gm tbi manifolds staggered center bolts. There are several options on doing this, they do have ways to view info on the fly with them. Most screws have a t25 torx head, but they also can be an allen head screw. Initial calibration of the tbi disclaimer the author of this presentation assumes no responsibility for information provided causing the owner to modify or alter their motorhome which shall result in. This will give the best build up procedure for a significant. One of the most popular efi conversions to older chevy engines or any engine for that matter is the gm tbi system using the 1227747 ecm. First, you need to ask yourself if you are planning on keeping your current powertrain configuration. Tuning, troubleshooting and modifying your chevy fuel injection system has never been. Throttle body injection chevy gmc tbi trucks gm tbi.
Set of two hiflow tbi police special fuel injectors for. Jegs performance products 19871995 chevy truck tbi 350ci. There is a lot more to tuning tbi, however is your best bet for that education. Some of the components shown above may look different from what will be included with your kit. Performance chips for chevrolet c1500 for sale ebay. There are even reasonably priced offtheshelf harnesses available if you dont want to. If you decide to go with tbi, look for a gm tbi setup from any engine similar in. Read on as jeff smith help a reader resolve an issue with his 1989 chevy k2500 engine concerning the installation of tbi heads. Self tuning fueling strategy tunes while you drive designed for the user that wants ease of use without having to be a tuning expert requires no laptop computer to set up or tune includes full color oled handheld tuner that offers simple setup and easy tuning of basic parameters such as engine idle speed. I dont tow anything with the truck, and i only drive it on the weekend. I was in the process of troubleshooting a gm tbi engine in a hot rod.
Read the tech article on latemodel tbi trucks power upgrades, brought to you by the experts at chevy high performance magazine. Hardware for tuning g1 chip adapter and c2 27sf512 chip required to reprogram. Tbs 10330 remanufactured gm tbi injector pod bottom casting tbi 220 systems 198690. There are many others that will do the same thing but the 1227747 is most well known and documented and will be the basis for this article. New tbi controller flash memoryno more chips laptop programable read 19268 times blue 82. And if i install a cam or maybe even a set of decent heads, will the tbi system deal with these mods ok. Consult a service manual or see below for any check engine light code definitions. The fuel injectors are located in the middle of the throttle body.
It is located on the left front corner of the tbi body, just ahead of the throttle arm. The g1 adapter bypasses your factory tuning, and lets you insert your own custom programmed chip without tearing up your stock memcal. Harris custom fuel injection programming information on. Ill likely follow cfm techs recommended tweaks for the gm tbi.
A tbi engine is a standard engine with throttle body fuel injection. This is a basic tbi harness for all engines using ecm 1227747 and 1228746 type ecmmany others can be used. A combination of unusual and off the shelf ecmselectronic components make for. How to tune and modify chevrolet fuel injection by ben watson. That means this engine can be real ready to run out of the box if you choose our our fast track startup, which includes break in, super tuning with a house carburetor and distributor. Ive already replaced the thermostat, spark plugs, clutch and had the oil changed. Not only do they show up in many trucks such as the c1500 pickup, but also camaros, firebirds, and corvettes, and other cars as well. We also stock general motors rebushed throttle body housings and have an inventory of multi port injectors. Anyone have any history with modifications to this setup. Lotta full size jeep guys401,360 amc wagoneers and cherokees and j trucks love gm tbi retrofit kits, they work great. I really like the gm tbi idea and would also go with one 2bbl direct mounted. This computer is from a 1989 full size chevy blazer that had a 5.
Gm issued a few different oe part numbers over the years for this injector. This update has also allowed us to put together some complete tuning packages obd1tune kits for the gm eprom based obdi vehicles providing a complete tuning solution for your vehicle much like the lt1tunekits for the 9495 lt1 cars. Tbi custom chip tuning for stock, transplant, conversion or high performance. What are my options on performance upgrades with the tbi setup. I had replied that its a major pita to get em to run right not impossible, just a royal pita i think with this setup there may be hope for the tbi. Jet 29205s 92 chevy truck 350 tbi 4l60 auto performance gm computer chip stage 2 fits. One of the members here asked about tuning a sbc400 tbi. After the car has received a full tune up you can start to consider your first modifications. Black bear performance offers inperson and mail order computer tuning for your gm car, truck, or suv with a twist.
By now, most of the tbi bodies have the plug removed that covered the throttle adjusting screw. However, since this should only be a temporary situation for tuning purposes. Controlled cortical impact model brain neurotrauma ncbi. The best tbi cam chevy message forum restoration and. Offtheshelf cam selection is pretty thin, and those available are fairly mild. If your chevy gm tbi is running rich this will help you trouble shoot it and fix it dont forget to subscribe today for more fact or fiction, diy,how to car repair,spooky or funny videos uploaded. For the more common engines, off the shelf adapters and intakes abound. Still allows for users to change other parameters to further fine tune base. Although just a small number of cars were equipped with tbi in 1987, this changed very rapidly in 1988 when it was introduced on the f bodies camaro and. In this episode i install the new computer for project super 10 in hope to get the truck running better. Typically, technical support is limited to the customer with only a harness purchase due to the complexity of. First, a chip adapter is used to convert whatever the ecm in question needs into a form that accepts a 28 pin eprom. Welcome to tbi chips throttle body injection services.
I drive about 140 miles a day, so increased mpg would be nice. How to build a high performance tbi engine it still runs. The tpi tuned port injection is a sequential injection that injects fuel into each cylinder allowing better tuning providing a good ecu, and allowing you to inject more fuel more precisely. Greetings, i have owned tbi powered rigs 91 suburban, 94 g20 van for a decade and while i have loved the dependability i have only rally partaken in basic troubleshooting and maintenance and i seek to know more and to better understand the system and, modifytune it myself. There exists a handy spread sheet for our trucks that allows quick and easy adjustment of the fuel tables. Im in the process of building a mild 350 tbi for a 1989 swb 4x4 gmc. More than one vehicle 1 out of 5 stars 1 product rating 1 product ratings jet 29205s 92 chevy truck 350 tbi 4l60 auto performance gm computer chip stage 2. We are dedicated to tuning your vehicles engine computer to attain maximum performance and the best drivability possible while keeping the. Every vehicle performs differently, and we realize that a standard cookiecutter tune or handheld programmer wont always work well for everybody. How to diy prom chip tuning for obd1 chevy gm throttle body. Factory tuning also has a tendency for retarded timing over 4k.
I have been posting recommended engine modifications for good streetable fuel injected engine since 2003. Our new contentrich platform now features a blog with updated tech information, tips for successful stressfree installation, in addition to sharing customer experiences and the latest industry news. Black bear performance custom tuning solutions for 96. You can use a late 80s or early 90s gm tbi definition. The early systems from 19821986 are just too old to do much with.
Thats really only needed in full on race conditions or tuning a motor for. Tbi fuel injection conversion using a gm tbi efi system. We chose a 1977 chevy nova with a 350 small block as our subject, but. You really have to be creative with used parts on port efi since typical off the shelf. At 34 to wot the computer uses a fixed program for max power. You have to tap off the exhaust manifoldheader for the egr with vortec heads.
How to tune and modify chevrolet fuel injection book. The complete tbi system comes with all components needed for a closed loop system except for. All tbi s, throttle body assemblies, and multi port injectors come with a complete one year warranty. This kits includes the tuner program, ecm definition file, burn2 programmer, flash memory, and required.