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Tbi ?

This is a discussion on Tbi ? within the General Help forums, part of the LSx Technical Help Section category; Hello i just got my new car. It is a 1992 Firebird with the 5.0 305. Its bone stock TBI. ...

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    Tbi ?

    Hello i just got my new car. It is a 1992 Firebird with the 5.0 305. Its bone stock TBI. I was told it is fuel injected but it sure didnt look like it once I pulled the air box off. Is it or was that the carb.? Im trying to figure this out so i know what to do with it. Thanks in advance.

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    Teh Combustinator MarkuzLS1's Avatar
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    Yeah, they're fuel injected...unless somebody swapped it for a carb. When you remove all the air cleaner shit, you should see the throttle body sitting on top of an intake manifold that looks alot like a carbureted intake. On top of the throttle body there will be two injectors firing down into it.

    Should look alot like this:

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    Well im at school right now .. and im goin to auto shop next. lol I will look again when I go down there and check it out. Thanks alot. Im pretty sure its stock. Does anyone make an aftermarket Throttle body or intake manifold for these cars.

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    Well it is fuel injected. My shop teacher was tellin me to put a carb on top and do away with the fuel injection. What do you Experts think? Thanks

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    Here for entertainment 502ci's Avatar
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    TBI...Throttle body injection. I would keep the throttle body, unless you want to start messing with the computer.

    I had a camaro 305 TBI, an absolute dog that ran 16.5 in the quarter. But with simple external bolt ons I got it to 14.8 keeping the TBI, still slow but big improvement.

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    yes i know my car is a dog. And i know it will never be "fast" but i just want something i can go out have some fun in and have some "balls" cause right now its nothin.

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    Here for entertainment 502ci's Avatar
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    Just so you know I wasn`t knocking your car saying it was slow, I`m saying it responds well to mods. Okay I did mention mine was slow comparing it to yours. My camaro was fun, drove the hell out of it and it never let me down. Ran it at the dragstrip over 300 runs no problem.




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    no lol its cool. I know you didnt. But im not one of those kids that say oh dude my car is so fast blah blah blah. im not gunna say somin that cant back up. I know my car isnt very fast, O well not many kids get a car like that as there first. Its somin for me to have fun with. So some day it will ok but right now its nothin special.

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    Teh Combustinator MarkuzLS1's Avatar
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    I put a carburetor on mine, but I wished I'd stuck with the fuel injection. They've both got their pros and cons.

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    Ya im gunna stick with the fuel injection... I just need to find an intake manifold and throttle body I've been on the hunt.

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    Teh Combustinator MarkuzLS1's Avatar
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    Quote Originally Posted by Hooked On Birds
    Ya im gunna stick with the fuel injection... I just need to find an intake manifold and throttle body I've been on the hunt.
    You can use any square bore 4-bbl carb manifold with Holley's adapter. Holley makes 2" TBI units, too.

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    Really! Thats awsome now it wont be so hard lookin for my manifold. Thanks alot.

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    Teh Combustinator MarkuzLS1's Avatar
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    One thing to watch out for, though. You've probably got centerbolt valve covers, so make sure the intake manifold you get specifies that it'll work for 87+.

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    Ok thats what my dad told me i need to find a manifold that fits 87+. I forgot about that. cool

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    The pic that markuz posted is of a holley TB, they probably make the intake manifold also...if not I know edelbrock does for sure. I had a 92 silverado with a 350 tbi and it was a great motor....wasn't fast but it did have a lot of low-end torque and never gave me any probs at all. Plus the motor is extrmemly easy to work on and mod.

    I'd definitely stay with the tbi...the everyday driving characteristics are a lot better than a carb IMO

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    Senior Member INMY01TA's Avatar
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    I had a 91 Camaro RS w/305 tbi. It was slow but bueatiful car. I got compliments on it all the time.

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    ya people always smile and give me thumbs up when im out cruising around. And it seems to be a hit with every one at school. And the deans love all the black lines in the parking lot now!

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    For future inquires about TBI check out thirdgen.org not that this isn't a great site it's just on thirdgen there is a complete message board for TBI. Congrats on your car, I have a 92 Camaro 305TBI and it is a blast. I agree with 502CI the 305 responds well to some simple bolt ons. Its were I learned how to modify. Have fun!

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