How big of a bore does a 305 TBI have?

The stock 305 and 350 TBI unit has 2 (1 11/16″) bores which flow 450 cfm of air. Up to 230hp engines that air flow is fine. you can do the ultimate TBI mods to the stock 42mm TBI unit and get that air flow up to 500cfm without increasing that bore diameter which is plenty for any 305 engine that you can run with TBI.

What is the TBI code on a 1990 Chevy truck?

Consult a service manual or see below for any check engine light code definitions. You can use a late 80’s or early 90’s GM TBI definition. If you have access to a scan tool use a hook up for a 1990 350 cu. in. 5.7L Chevrolet truck. For some scan tools enter VIN 10th“L” 3rd“C” 8th“K”.

What kind of Cam do I need for a 305 TBI?

You can snag a used vortec L31 cam (same thing as 350 B Body LT1 cam) or even better is a used 1994-1997 LT1 Z28 cam. All can be bought used for under $100 and with a nice stage 2 chip can get you to 200hp or a bit better.

What’s the casting number on a TBI 305 head?

Those are the last 3 digits of the casting number on top of that head under the valve cover. These heads flow as well as pretty much any other 305 compatible head out there and respond very well to some porting and good for nearly 30hp over the TBI 305 heads.

When did the Chevrolet 305 V8 engine come out?

As America faced an energy crisis and the government began to regulate a car’s emissions, General Motors made adjustments to many of their small block, V8 engines. GM introduced the Chevrolet 305 engine in 1976 to provide a smooth driving performance while allowing for lower octane fuels and lower emissions.

What kind of engine does a Camaro 305 have?

Enginetech ES336 is the cheapest I have found and I have a customer using one in a Camaro TBI 305 with exhaust and air filter upgrades and making 225hp at flywheel. 178 rear wheel horsepower.

What can I do to my 305 TBI engine?

Easiest fix is to replace it with a 3″ tall 14″ diameter open element filter with a flat base. You can drill a hole in the base to put your IAT sensor in. Also toss the choke collar that is between the TBI and the air cleaner assembly. Good for around 5hp on a 305 car and again mandatory for any decent engine upgrade.

How much air flow does a 305 TBI have?

The TBI unit. The stock 305 and 350 TBI unit has 2 (1 11/16″) bores which flow 450 cfm of air. Up to 230hp engines that air flow is fine. you can do the ultimate TBI mods to the stock 42mm TBI unit and get that air flow up to 500cfm without increasing that bore diameter which is plenty for any 305 engine that you can run with TBI. 7. Injectors.

What kind of EFI system do I need for a TBI engine?

TBI Fuel Injection Conversion using a GM TBI EFI system! 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.

Can a IAT sensor be installed in a 305?

You can drill a hole in the base to put your IAT sensor in. Also toss the choke collar that is between the TBI and the air cleaner assembly. Good for around 5hp on a 305 car and again mandatory for any decent engine upgrade. Another nice setup can be seen here http://91rsramair.tripod.com/ for colder air input.

What kind of injectors does a Camaro 305 use?

Really don’t mess with changing injectors much on the 305 engines but have lots of customers that run the LT1 Z28 cams in the Camaro 305 engines and like to use the 350 truck injectors and I program the chip to run with those injectors.

Can a 305 Camaro be upgraded to 350?

Your car had engine options from the factory but only the 305 was available with TBI, when your car was optioned with a 5.7L 350 it came with MPI. So the problem we have here is that there is no prom made to go into your PCM from GM for an upgrade that is compatible with a 350.

Is there a TBI option on a 1989 Camaro 305?

If I recall correctly, The TBI option was only available on the 305 itself which was only in the all new 1989 RS Camaro. In 1988 you could get a plain jane V8 Camaro and it was not an RS, just a Camaro only not an IROC either.

Is there a TBI on a 1989 IROC-Z?

In my years in the auto service industry (1989 – 1998) I never saw a TBI in a 1989 IROC-Z. They were always TPI. If I recall correctly, The TBI option was only available on the 305 itself which was only in the all new 1989 RS Camaro.

When did the Camaro RS option become available?

In 1989 the RS option became available and many of the RS’s were cloned into IROC’s. The TBI engine has one large injector squiritng down into the intake manifold.

How to troubleshoot your TBI fuel injection system?

Troubleshooting your TBI Fuel Injection System Most of the problems encountered while installing your fuel injection system or after a time of operation are very simple. If your check engine light is on you more than likely have a hard fault meaning something is grounded out, unplugged, operating out of range or has gone bad. See

What kind of car was the Chevy TBI in 1987?

Amazon.com: 1987 1988 1989 CHEVY GMC TBI THROTTLE BODY TRUCK / SUBURBAN w/7.4L / 454c.i. V8: Automotive

What was the year of the Chevy TBI throttle?

1987 1988 1989 CHEVY GMC TBI THROTTLE BODY TRUCK / SUBURBAN w/7.4L / 454c.i. V8. If you are not sure about your application please don’t hesitate to contact our sales/tech dept by emailing us and we will gladly help you.

Is the snorkel on a TBI Camaro too small?

The air cleaner. http://www.thirdgen.org/newdesign/tech/ultimatetbi.shtml The snorkel on the TBI camaro is too small for a 2.8L V6 much less a 5L V8. Easiest fix is to replace it with a 3″ tall 14″ diameter open element filter with a flat base.

When did the Chevy 400 small block engine come out?

Jupiterimages/Comstock/Getty Images The 400 CID Chevy small block engine was produced from 1970 until 1980 and was the largest displacement engine made in that platform. It was intended as a low performance, high-torque engine primarily used in Chevy’s heavier passenger cars and light-duty trucks.

What kind of engine does a 305 Chevy have?

The Chevrolet 305 was the engine of choice for millions of full-sized GM cars and trucks that were too large for a V6 but didn’t require a 350 just to cruise around town. However, hot-rodders from the dawn of time have made a religion out of modifying just such pedestrian offerings and turning them into hard-core racers.

What should the TPI be on a Camaro?

THe 305 and t.p.i. is already out of the car, I yanked it last night. The 421 s.b. I have starts making the most of it’s power above 3000 and cranks out to about 7100. I have plans to streep/strip this car.

How big of a bore does a 305 TBI have?