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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.

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Old 08-16-2009, 12:42 AM   #1
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Car: '88 Iroc-Z z28 Camaro
Engine: Carb 355
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Getting the carb ich
Ive been wanting to swap over my tpi setup to a carb setup soo badly for quit some time now. my question is that do i have to have my electric fuel pump wit a regulator or can i run a mechanical pump and get rid of my electric in take one? i got a '69 chevy block under the hood so idk if that means anything special, i kno some newer blocks have the oil cooler lines but i dont.
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Old 08-16-2009, 06:30 PM   #2
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Re: Getting the carb ich
You can do it either way. Using a mechanical pump will require dropping the tank, removing the electric pump, and installing a carb pickup line, but using the electric pump will require a $80 RETURN STYLE fuel pressure regulator such as the Mallory 4309 - owners choice.
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Last edited by camaronewbie; 08-16-2009 at 06:34 PM.
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Old 08-16-2009, 08:04 PM   #3
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Car: '88 Iroc-Z z28 Camaro
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Re: Getting the carb ich
Ok cool well i think i'll go wit the regulator, i dropped the tank once and aint gonna do it again. wat psi should the regulator be set at?
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Old 08-16-2009, 08:09 PM   #4
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Re: Getting the carb ich
5-7 psi for carb. If you get the mallory, do not hook up a vacuum line to it - it makes tuning impossible - it's strictly for a blower or something.
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350 Carb 10:1 Dometops Mild Cam
Hedmann Headers Hi-Flo Cat/Aerochamber Muffler
700R4 B&M Shift Kit LS1 Disc Rear w/3.42 Posi
Poly Bushings Eibach Prokit Bilstein Shocks/Struts
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Old 08-16-2009, 08:13 PM   #5
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Re: Getting the carb ich
Ok thanks for the info. How would i wire up the fuel pump relay and all tht good stuff when im taking out the harness and everything?
Last edited by Black Z28; 08-16-2009 at 09:19 PM.
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Old 08-17-2009, 08:46 AM   #6
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Re: Getting the carb ich
If I were to do mine again... I would have got the regulator and used the stock electric fuel pump to avoid the need to re route fuel lines and mount a new pump. Also! I dont think I would have went for the carb with the vacuum secondaries or electric choke. These two features seem to cause me nothing but prooooblems. I like the simple stuff, less things to go wrong.
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Old 08-17-2009, 11:01 AM   #7
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Re: Getting the carb ich
IIRC you are the one with the Painless wiring harness and issues, right? You can put a relay under hood, with one side going to pump, other side going to battery, then add a ground and a hot-in-run on the other prongs - thus when key is turned on, relay gets energized, sending battery poer to the pump, and pump only gets juice whrn key is on.
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Old 08-18-2009, 12:19 PM   #8
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Car: '88 Iroc-Z z28 Camaro
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Re: Getting the carb ich
Wow tht seems pretty dang simple, gonna have to do some research an hunt down the rite wires for the pump and everything
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Old 08-18-2009, 12:19 PM
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