1982 280ZX Carb Conversion - Nissan : Datsun ZCar forum :Nissan Z Forum: 240Z to 370Z
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post #1 of 21 (permalink) Old 06-29-2018, 10:18 PM Thread Starter
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1982 280ZX Carb Conversion

Ok, I am wearing a bit thin on this 36 year old FI system. I think I'm going with a 4-Barrel Conversion kit. Thoughts on who currently makes the best/most complete one? Thoughts on 4BBL vs 3X2BBL?
I'm leaning toward the Motorsport/ZStore Kit, but Arizona Z Car has a nice looking manifold too.

Thanks

Orochi - 82 280ZX N/A
DD - 03 E39 530
RIP - 14 Focus ST

Last edited by demasoni; 06-29-2018 at 10:21 PM. Reason: update title with model year
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post #2 of 21 (permalink) Old 07-01-2018, 12:34 AM
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Originally Posted by demasoni View Post
Ok, I am wearing a bit thin on this 36 year old FI system. I think I'm going with a 4-Barrel Conversion kit. Thoughts on who currently makes the best/most complete one? Thoughts on 4BBL vs 3X2BBL?
I'm leaning toward the Motorsport/ZStore Kit, but Arizona Z Car has a nice looking manifold too.

Thanks
The L-Jetronic system on L28s is a fairly bulletproof system, what seems to be the issue/reason you want to ditch it?

1978 280z - stock L28 engine - Dallas, TX
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post #3 of 21 (permalink) Old 07-01-2018, 10:53 AM
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Age, corrosion are two reasons. Old wiring and connectors takes the EFI system out of spec and cause poor performance.

1975 280Z F54/N47 MSA 6-1 Header 2.5 Exhaust
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post #4 of 21 (permalink) Old 07-01-2018, 12:35 PM
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the fuel injection systems on these cars are old technology. old, but they are sound and simple. they last and they work. they are reliable.
like what was said above, they break down over time due to corroded, broken, and dirty connections. cleaning these up and replacing the broken and missing connections can bring life back in system. unless you just prefer carb systems over FI, you're just doing the car a disservice.


there's nothing wrong with carbs. all the early ones were carbs, and by design. the fuel injected L28 on your ZX is also by design, for good reason.
of course, nothing looks and sounds better than a clean carb setup on an L-series power plant. something the fuel injection setup will never match. but, for driving efficiency, nothing is going to beat FI setups on THESE cars.


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All the Gods, all the Heavens, all the Hells, are within you. - Joseph Campbell -

Pooja II ~ 1984 300ZXT 50th AE ~ 2018 - 2019
Pooja ~ 1987 300ZX 2+2 NA2T ~ 2012 - 2018
Suzanna ~ 1983 280ZX Coupe ~ 2010 - 2019
Alana ~ 1976 280z Coupe NA2T ~ 2008 - 2019
Dianna ~ 1980 280ZX Slick Top ~ 2001 - 2007

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post #5 of 21 (permalink) Old 07-01-2018, 01:13 PM Thread Starter
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Age, corrosion are two reasons. Old wiring and connectors takes the EFI system out of spec and cause poor performance.
what @bificus said + a previous owner who thought he could fix it. I would rather throw good money after a good upgrade then spend hours with electrical cleaner, a brush, and a multimeter trying to diagnose sketchy parts, trying to find replacements that are no longer made to make a fugly engine bay still fugly....

Orochi - 82 280ZX N/A
DD - 03 E39 530
RIP - 14 Focus ST
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post #6 of 21 (permalink) Old 07-01-2018, 05:41 PM
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Youíre gonna spend hours and hours removing the EFI. Then youíll spend MANY more hours and hours PROPERLY fitting a carburetor or carburetors to the motor. After that youíll likely spend more hours to dial the system in to POSSIBLY get reasonsbly close to the drivability, fuel mileage and power that the factory EFI has built into it. Then youíll likely have to use E0 gas bescause the E10 at your local gas station will boil in the fuel lines and float bowl on the carburator(s). 93 octane E10 wonít help either. Get a SBC installation kit. Pull the old motor and itís accessories. Buy a crate motor and save hours and hours chasing your tail. 18436572

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post #7 of 21 (permalink) Old 07-02-2018, 10:43 AM Thread Starter
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So, ok, and I acknowledge all ^^^ that, but back to my original question....thoughts on Clifford manifold vs Arizona Z Car manifold?

TIA

Orochi - 82 280ZX N/A
DD - 03 E39 530
RIP - 14 Focus ST
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post #8 of 21 (permalink) Old 07-02-2018, 11:07 AM
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Call the manufacturer. Go with your gut. Or figure out the EFI... it works great when itís dialed in.
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post #9 of 21 (permalink) Old 07-02-2018, 12:33 PM Thread Starter
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a bit of a salty group, no wonder these cars are all rusted out

Orochi - 82 280ZX N/A
DD - 03 E39 530
RIP - 14 Focus ST
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post #10 of 21 (permalink) Old 07-02-2018, 07:16 PM
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Go with the Arizona intake manifold. It's a dual plane and will help with low rpm torque for the street. The holley 390 carb works well with the exception of the electric choke.
I had this setup and it is simple to install. The only issue is the choke...pain in the a**
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