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4 Barrel Conversion Question?


alabamaman882

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hello, I am a proud owner of a 78 280z coupe and i currently havce all the necessary parts to put the arizona 4 barrel manifold in place of my pooched efi, and the question that i had was whether or not it is alright to remove the efi fuel pump and put a lower pressure inline electric in its place, or......?

 

thanx for any suggestions, gets me one step closer to melting the rubber off from those dry rotted tires

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  • 2 weeks later...

alabamaman882 not to be biased, but why do you wanna go 4 barrel? For a Z, SU's IMO there alot easiler to work on and more reliable. You could probably get a set for about the same price of a four barrel and its intake. Also a lot of guys here would agree that Su's perform better and can be tuned to perfection. If your interested check Z theraphy out. They offer complete rebuild kits and even a 2 hour video on everthing about the carbs. Away good luck on your project.

 

ASA240Z aka Allen

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Guest beandip
hello' date=' I am a proud owner of a 78 280z coupe and i currently havce all the necessary parts to put the arizona 4 barrel manifold in place of my pooched efi, and the question that i had was whether or not it is alright to remove the efi fuel pump and put a lower pressure inline electric in its place, or......?

 

thanx for any suggestions, gets me one step closer to melting the rubber off from those dry rotted tires[/quote']

If you can find a '80s RX7 the pump from one of those will work great. I have been running one on my Z for 5 yrs. $15.00 at he bone yard. they pump at 4 to 5psi. and will feed a set of tripples on a stroker if needed. Quiet too. Just be sure it is not a injected RX . My 2¢

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I have used SU's and Holley four barrel carbs. Right now on my current Z after FI problems, I just installed the AZ zcar manifold, Holley Red fuel pump, FP regulator and a nice 390cfm. I did this all myself and I am what you could call an "amateur mechanic." This is an extremely easy setup, and the first time I turned the key it fired right up. The car runs great, and I am happy with the definite increase in hp. Just make sure to run a hot wire from the Holley red to a power wire somewhere else on the vehicle, (I almost hooked it up to the original wiring), as the FI pumps work totally different. I would recommend the 4-barrel set up, the SU setup is equally comparable though.

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