When did Chevy switch to TBI?

TBI was started in 1987, but some 87’s registered as 86’s had them. Up to 92/93 the engines were the same.

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.

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.

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’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.

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 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”.

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.

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.