TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

TBI to carb

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Old Mar 20, 2009 | 08:07 AM
  #1  
Antoneal's Avatar
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From: Grand Rapids, MI
Car: 1969 Camaro SS
Engine: 396 bbc Berger built
Transmission: 4 spd stick
Axle/Gears: 4.11 posi
TBI to carb

So i kno i am going to bring get told "search for this, its a common thing" Well i have spent the last 2 hours searching this on this site and have yet to find exactly what i am looking for.

I have a 91 Camaro RS (VIN shows E for the L03 motor) Original owner told me he had swapped the motor for a 350 with a two barrel carb, but looks like a 305 with TBI to me. But moving on to the real question here.

Would it be worth it to swap TBI for a Carb? If so, what does it involve? Costs? Would it be better to buy upgrades etc for a TBI or Carb? I have a Holley 4 barrel Single Pumper (was told 650, havent investigated this one either yet lol) and possibly an manifold for a 4 barrel carb, but i kno it cant be as easy as i am thinking. Please enlighten me with some more information on this situation.

Thanks,
Troy

Last edited by Antoneal; May 18, 2009 at 11:45 AM. Reason: l05 to l03
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Old Mar 20, 2009 | 08:59 AM
  #2  
Ca[maro]88's Avatar
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From: Peoria, IL
Car: 1988 Camaro Sport Coupe
Engine: 5.0 305 Carb'd
Transmission: 700R4
Axle/Gears: 3.23
Re: TBI to carb

go to the carb board and look at the sticky that says EFI to carb. everything you wanna know.
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Old Mar 20, 2009 | 12:54 PM
  #3  
Antoneal's Avatar
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From: Grand Rapids, MI
Car: 1969 Camaro SS
Engine: 396 bbc Berger built
Transmission: 4 spd stick
Axle/Gears: 4.11 posi
Re: TBI to carb

So either i am completely blind, or i cannot find it. But i did go to the carb board and cannot seem to locate EFI to Carb sticky.. and i went to search and only found a few other posts, but ones i've already been through
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Old Mar 20, 2009 | 01:24 PM
  #4  
Ca[maro]88's Avatar
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From: Peoria, IL
Car: 1988 Camaro Sport Coupe
Engine: 5.0 305 Carb'd
Transmission: 700R4
Axle/Gears: 3.23
Re: TBI to carb

hmm i tried looking for it to and its not there anymore.. i used that as a source when i first wanted to learn about the carb swap.

basically your only going to need a couple things.
1 a carburator intake manifold get a used edelbrock performer intake for around 70 bucks
2 a non computer controlled distributer 100 bucks
3 a carburator 250 bucks get a holley 600 if you dont already have a carb
4 an AFPR (adjustable fuel pressure regulator) i prefer the Mallory 4309 80 bucks
5 a bracket for your throttle cable and your passing gear linkage (if its automatic tranny) free
6 a way to lock up your torque converter. you can get one from summit for like 70 bucks.

getting used things is much cheaper, but if you buy new from summit your get a warrenty. those are pretty much all the things your going to need. oh and an open weekend a couple cases of beer and a friend or two. if you need anything you can pm me.
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Old Mar 26, 2009 | 07:45 PM
  #5  
eschevyrda's Avatar
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Joined: Aug 2006
Posts: 234
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From: new york
Car: 89camaro rs
Engine: 350tbi (needs carb!)
Transmission: 700r4
Axle/Gears: 32x in process
Re: TBI to carb

im up next with the swap,

question , What was the first thing you notice going from TBI to CARB?
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Old Mar 30, 2009 | 01:09 PM
  #6  
davidglanza's Avatar
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Joined: Feb 2009
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From: ireland...
Car: camaro 5litre v8..
Engine: 305
Transmission: manual..
Re: TBI to carb

is it actually worth the swap..............
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Old Mar 31, 2009 | 02:40 PM
  #7  
1ADan's Avatar
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From: Pepperell, MA
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: TBI to carb

carb is easier to tweak if you're not computer savvy, but not necessarily as optimized throughout the full power band as a good tuning would do.

i also liked that making changes were not limited to what the computer would allow.

both setups have their pros and cons. I went carbed because I swapped in a 400ci/th350, had all the parts lying around, and didnt have the time to get the computer going with a setup that never came computerized
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Old Mar 31, 2009 | 04:40 PM
  #8  
thomas1976's Avatar
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Joined: Jun 2006
Posts: 2,199
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From: West-Central
Car: 91 Trans am
Engine: built 360 TBI
Transmission: built 700r4
Axle/Gears: 10bolt/3.23
Re: TBI to carb

If you are posting here on tgo you have anough skills to handel the computer part involved in tuning EFI with the nice and powerful EBL flash.

Tuninig a carb is very limited compared to what EBL "the beast" will allow you to do.

Definally plug in an EBL flash if you have EFI, before you swap to carb, to know what you are missing.
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