Carburetors Carb discussion and questions. Upgrading your Third Gen's carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.

TBI Issues, going carb!

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Old Dec 1, 2008 | 11:58 AM
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LS1IrocZ's Avatar
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TBI Issues, going carb!

Hey guys. I just picked up another project car and got some questions. It was originally a 305TBI and the old owner swapped out the 305 for a complete LO5 blazer 350. He also swapped the blazer computer. It is running open headers. The car completely falls on it's face and is tons slower than a stock tbi 305 car. I don't even want to deal with it (even though I am curious what is wrong) so I am going to swap to a carb.



I see lots of threads and questions here on the swap topic. I have been searching and just wondering if there are any complete write up threads on the swap? I know I need a vac HEI distributor and a return style regulator, new intake and carb. What else is needed? What fittings, what can I get rid of, and what are the little problems involved with it.



I just want to get it running reliable for a daily driver before I tear it down for a real stroker and fuel system. Since I am eventually going to go 434 dual stage powerglide etc etc I want to invest the least amount of cash possible. Thanks guys.
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Old Dec 1, 2008 | 12:04 PM
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Engine: 350 TBI W/all Ultimate TBI Mods
Transmission: 700R4 Stage 4
Axle/Gears: 9 Bolt 3.27
Re: TBI Issues, going carb!

I know a lot on here are not "carb" fans, lol. It may be worth your while to fix the TBI setup you have. Yes, they are a little more work than carb, but the performance can be better if done correctly.

This is just my opinion and I know a lot of guys on here who might comment like me.

Dig in a little deeper on the threads and you will find a ton on swapping a TBI for a carb and carb to TBI.
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Old Dec 1, 2008 | 12:27 PM
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Re: TBI Issues, going carb!

Originally Posted by dctrumpet
I know a lot on here are not "carb" fans, lol. It may be worth your while to fix the TBI setup you have. Yes, they are a little more work than carb, but the performance can be better if done correctly.

This is just my opinion and I know a lot of guys on here who might comment like me.

Dig in a little deeper on the threads and you will find a ton on swapping a TBI for a carb and carb to TBI.

I grew up with carbs, have one laying around, and have a few nitrous plate systems laying around. I know I can tune out any problem with a carb, and thats the direction the car is going in the winter anyways. I just do not want to be bothered with the TBI since i am only going to rip it out anyways. 8's on a TBI set up is not going to happen

I would like to fix it before I rip it out anyways. I hate feeling like I gave up on something.
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Old Dec 1, 2008 | 12:31 PM
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Engine: 350 TBI W/all Ultimate TBI Mods
Transmission: 700R4 Stage 4
Axle/Gears: 9 Bolt 3.27
Re: TBI Issues, going carb!

Cool! Go for it. 8's is a nice goal to accomplish.
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Old Dec 2, 2008 | 01:03 PM
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Re: TBI Issues, going carb!

Anyone? I could have swore I seen a nice write up on it in here a long time ago. I just can't seem to find it now.
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Old Dec 2, 2008 | 02:08 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Look in the welcome sticky in the top section of this forum. There's a link in there.
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Old Dec 3, 2008 | 01:36 PM
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Re: TBI Issues, going carb!

Originally Posted by five7kid
Look in the welcome sticky in the top section of this forum. There's a link in there.

Thanks man. I knew that article was out in plain sight and I was just looking past it. I hate when I do that.
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Old Dec 4, 2008 | 03:56 PM
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Re: TBI Issues, going carb!

another quick question... In that write up it says to use a certain distributor. I can ignore that part, get a regular vacume advance HEI and use my MSD digital 6 I have laying around right?
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Old Dec 4, 2008 | 05:43 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Right.
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Old Dec 4, 2008 | 05:47 PM
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Re: TBI Issues, going carb!

I've done the TPI to carb swap. Simple stuff but lots of parts.
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