Ok, I am going carb and I don't know to much about it. I know the parts I need (correct me if I am wrong) I am getting the ZZ4 from GMPP and I have TBI right now. I am converting it to a Speed Demon 750 vaccum secondary carb (I think its electrical) and then I have to get a aftermarket fuel pump (holley 7psi pump) and a Mallory Return line Fuel Pressure Regulator (not sure at what to set it at. Isn't it like 4-5psi?) Anyways, and I think that is it. Now is there anything I should know? Like I don't know what cable bracket will work with this speed demon and a ZZ4. Will I loose cruise control? Anything I should know about my 700r4 and this carb setup? The 700r4 is being rebuilt to handle the torque and hp from the ZZ4. Do I start a carbed engine differently then I do my old fuel injection? Just stuff like that I would need to know about. Thanks guys.

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Eric Natzke
91 Firebird 305 TBI (ZZ4 summer of "01")
ASCD Ram Air Hood-3" custom exaust-Flowmaster 80 Series-No Cat-Edelbrock TES Headers (coated)-March Pulleys-TBI Spacer-K&N Open ELement-TransGo Shift Kit-B&M Supercooler 28,000 GVW-Hypertech Thermomaster-160 Stat-3:42 GM Gears-Auburn Posi Unit-Edlebrock Strut Tower Brace-MSD Superconducters-Accel Cap & Rotor
-Rapidfire Plugs-265/50/R15 Tires-Emmison's all Gone

http://hometown.aol.com/J007Golden/index2.html

 

Use your TBI in-tank fuel pump with a 3-port (supply, carb, return) regulator. Set it at 5-7 psig.

I believe your TBI cables will work on a carb with proper brackets (a recent post showed an aftermarket piece). If not, get carb cables from the dealer for accelerator, TV, and cruise.

By "electric" carb, I assume you mean electric choke. Run a 12-volt ignition-switched wire (only has power when the ignition switch is on) to power it. Before you start the engine cold, depress the accelerator about 1/3, let it up - this sets the choke to the start position. After it starts, tap the pedal to bring the idle down some. It will come down all the way when the engine (choke) warms up and the accelerator is off idle (for instance, as you've been driving it). When hot, depress the pedal to bring the throttle blades slightly off idle while you crank the engine. Let it off when it starts.

The TH700 will do what you want except for the torque convertor clutch lock-up, which is controlled by the computer and won't know what to do without its old signals. Either wire a mechanical switch (see tech articles for how to), or get a lock-up kit from Summit or Jegs (or similar).

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82 Berlinetta, orig V-6 car. Rescued w/86 LG4/TH700R with all harnesses, sensors, ECM, etc. 2.73 open. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LB9 w/ZZ3 cam, exhaust, paint, etc.).
57 Bel Air, my 1st car. Currently 396 .030 over, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & shift kit, 3.08 10-bolt, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.

 

Sweet, that is really helpful. Thanks guys. Anyone else have anything to add?

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Eric Natzke
91 Firebird 305 TBI (ZZ4 summer of "01")
ASCD Ram Air Hood-3" custom exaust-Flowmaster 80 Series-No Cat-Edelbrock TES Headers (coated)-March Pulleys-TBI Spacer-K&N Open ELement-TransGo Shift Kit-B&M Supercooler 28,000 GVW-Hypertech Thermomaster-160 Stat-3:42 GM Gears-Auburn Posi Unit-Edlebrock Strut Tower Brace-MSD Superconducters-Accel Cap & Rotor
-Rapidfire Plugs-265/50/R15 Tires-Emmison's all Gone

http://hometown.aol.com/J007Golden/index2.html

 

No flame intended just a Question how did you decide on a 750 cfm seems a little large for a 305 cid unless you are spinning 8,000 rpm .You may want to try a 600cfm Just my .02 let us know how it works out always willing to learn.

 

Its not for my 305 man. Its for the ZZ4.

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Eric Natzke
91 Firebird 305 TBI (ZZ4 summer of "01")
ASCD Ram Air Hood-3" custom exaust-Flowmaster 80 Series-No Cat-Edelbrock TES Headers (coated)-March Pulleys-TBI Spacer-K&N Open ELement-TransGo Shift Kit-B&M Supercooler 28,000 GVW-Hypertech Thermomaster-160 Stat-3:42 GM Gears-Auburn Posi Unit-Edlebrock Strut Tower Brace-MSD Superconducters-Accel Cap & Rotor
-Rapidfire Plugs-265/50/R15 Tires-Emmison's all Gone

http://hometown.aol.com/J007Golden/index2.html

 

sorry just responding to the tag.

 

Thats ok man.