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.

few question before i go carb from TBI

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Old Mar 21, 2002 | 10:48 AM
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From: Barboursville, WV
few question before i go carb from TBI

what kind of carb do you guys recommend? i was thinking maybe a edelbrock performer 600cfm..this will be on a 305 that will soon hopefully have a lt1 (or bigger since i can with carb) and torquer 305 heads...how are the holley carbs? and the street avengers made by holley??
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Old Mar 21, 2002 | 11:05 AM
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I decided on the Carter 625CFM elec choke($199) Accel HEI Distrib($99) and Edelbrock Torqer II intake. All for about 500 bucks, Not bad... I am leaving the elec pump in the tank and just going to an adjustable fuel pressure reg(The pumps new so I am not going to go through the trouble again of dropping the tank to take it out.)
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Old Mar 21, 2002 | 11:14 AM
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From: Barboursville, WV
same here i just put a pump in mine a couple months ago...not fun at all...what about a FPR...your gonna need that to...other than that is it a hard swap at all? looks fairly easy...also can i do away with the EGR or will it still run like crap? i dont see why it would since the computer no longer has control of it...im gonna leave the computer there so it can still give me the torque convertor lockup and whatever else it can do which wont be much without all the sensors...everybody keeps telling me to stay TBI and burn my own chips...that sounds harder than turning a few screws to me...
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Old Mar 21, 2002 | 12:50 PM
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I had the HOlley S/A 770cfm on my stroker. Good carb, good throttle response, good choke, and looks good too.

Definetly a good carb for an everyday driver.
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Old Mar 21, 2002 | 01:30 PM
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From: Zeigler Illinois
Originally posted by TBI305Camaro
same here i just put a pump in mine a couple months ago...not fun at all...what about a FPR...your gonna need that to...other than that is it a hard swap at all? looks fairly easy...also can i do away with the EGR or will it still run like crap? i dont see why it would since the computer no longer has control of it...im gonna leave the computer there so it can still give me the torque convertor lockup and whatever else it can do which wont be much without all the sensors...everybody keeps telling me to stay TBI and burn my own chips...that sounds harder than turning a few screws to me...
I am getting an adjustable FPR, and set it to 6 at first. Then drive it and tune the jets/and fuel pressure a little. The EGR... HEHE DITCH IT. The TCC lock up? I am installing a switch. that way it's only on on the highway...
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Old Mar 21, 2002 | 10:44 PM
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From: Barboursville, WV
i guess i could do that...i saw the kit in summit to make the 700r4 run without the computer...maybe ill just do that...do you think 570cfm street avenger will be good? it says it good up to 300hp which would probably be the max id ever see with the 305 without juice...
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Old Mar 21, 2002 | 11:38 PM
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Car: 88 IROC-Z
Engine: 383 Stroker
Transmission: TH350
Originally posted by TBI305Camaro
everybody keeps telling me to stay TBI and burn my own chips...that sounds harder than turning a few screws to me...
Let me tell ya, I don't regret one bit going to carb from TBI. I wasted a sh*tload of time and money on trying to please the sensors and ecm. Looking back, it's like a nightmare.

:hail:IROC-Z
:hail:Carbs
To Hell with TBI
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Old Mar 22, 2002 | 12:09 PM
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From: Barboursville, WV
are the regular holley carbs any good? the S/A is pretty expensive but i guess if its alot better i should get it...did you have to modify the fuel lines alot when you went from tbi to carb? what did you need to do it?
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Old Mar 22, 2002 | 02:14 PM
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Car: 88 IROC-Z
Engine: 383 Stroker
Transmission: TH350
All I did was do away witht the metal tubes from the alternator to the TB and use rubber fuel line to the AFPR. Real easy.

:hail:IROC-Z
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Old Mar 22, 2002 | 02:21 PM
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From: Huntsville, AL
Car: '00 Chevrolet Corvette
Engine: LS1
Transmission: 4L60E
Axle/Gears: 2.73
I've got to agree with rocky. I wish that I had swapped as soon as the computer started giving me trouble. I feel like I wasted an insane amount of time and $$$$$$.
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Old Mar 22, 2002 | 04:13 PM
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camaro hunter d:i thought you had to flip the switch to lock up the TC anytime you were 3rd or 4th? please clear this up man, i REALLY dont want to switch to carb and find out i have to switch on my TC every 2 minutes.
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Old Mar 22, 2002 | 10:52 PM
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From: Zeigler Illinois
Originally posted by mattRS
camaro hunter d:i thought you had to flip the switch to lock up the TC anytime you were 3rd or 4th? please clear this up man, i REALLY dont want to switch to carb and find out i have to switch on my TC every 2 minutes.
No the switch is either on or off. Driving on the street and not "cruising' have it off. Highway or long slow cruise flip it on. The TCC is there to help get MPG. Thats it really. If your not racing and cruising at 30-40 MPH then go ahead and flip it on. Your just putting the switch in to take manual control of the TCC lock up is all.
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Old Mar 23, 2002 | 12:33 AM
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From: Barboursville, WV
do away with the metal tubes from the alternator to the TBI? what metal hose from the alternator to the tbi? huh? also what AFPR should i get?
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Old Mar 23, 2002 | 12:39 AM
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From: Huntsville, AL
Car: '00 Chevrolet Corvette
Engine: LS1
Transmission: 4L60E
Axle/Gears: 2.73
what metal tubes from the alternator to the TBI?
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Old Mar 23, 2002 | 01:31 AM
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Car: 88 IROC-Z
Engine: 383 Stroker
Transmission: TH350
The metal gas lines that run by the driver's side valve cover. Mine's an 88, your's may be different. The metal stock fuel pressure and return lines run from the rear of the car up to right by the alternator where rubber hoses connect those to two more metal lines and turn and go back to the TB. In the picture, the white line is where the fuel lines enter the engine bay. The red lines are where the stock metal fuel lines were going to the TB after curving at the alternator. The blue line is where the rubber fuel pressure line is now going to the Mallory 3 port return style AFPR. The yellow line is where the rubber return line is, going from the AFPR back to the tank.

:hail:IROC-Z
Attached Thumbnails few question before i go carb from TBI-fuel-lines.jpg  
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Old Mar 23, 2002 | 02:40 AM
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From: ***'s country, henry county,ohio
IMHO get yourself a Q-jet, and buy the book by Doug Roe, Rochester Carburators.
The Q-jet will flow enough cfm to feed almost any engine you can shoe horn into the car. And you can tune the **** out of it.
Excellent throttle response, and if you can keep your foot out of it , excellent milage too.
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Old Mar 25, 2002 | 11:14 AM
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From: Barboursville, WV
mine is an 88 also and i think i know what line your talking about now...i was wondering what that thing was...did you have to cut the fuel lines to make them fit into the carb? or are the hookups similar? ive only seen carbs that take the fuel line up front...can you get me a pic without the cleaner?
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Old Mar 25, 2002 | 11:36 AM
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From: Huntsville, AL
Car: '00 Chevrolet Corvette
Engine: LS1
Transmission: 4L60E
Axle/Gears: 2.73
When you said "metal line going from the alternator to the throttle body" I thought you meant literally...like a line that attached to the alternator ran over to the throttle body and plugged in there...I know what you mean now, though.

I cut the metal tubes and ran a rubber fuel line from the fuel pump line to the AFPR, from the AFPR to the return line, and another from the AFPR to the carb's dual feed line.
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