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#1
08-29-2008, 06:57 AM
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Re: ZL1 correct carburetor
Is it old and crusty or new and shiny?
Jason 
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#2
08-30-2008, 05:13 AM
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Re: ZL1 correct carburetor
[ QUOTE ]
Is it old and crusty or new and shiny? Jason [/ QUOTE ] new and shiny
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1969 9566AA COPO Chevelle M-22 1969 Malibu 489 ZL-1 T-56/4.56 1969 Beaumont 540 th400 3.70 1969 Chevelle 300 Deluxe 427 ZL-1 M 22W 1970 Olds 442 W 30 2 door post 1969 Ply. GTX 426 hemi auto. Blue. 1940 Dodge pick up Durango 4X4 1968 Camaro ragtop LSA ZL1
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#3
08-30-2008, 05:17 AM
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Re: ZL1 correct carburetor
There are plenty of guys stamping the new ones that do not come with a date. Either way, it should work great for your application.
Jason
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#4
08-31-2008, 01:47 AM
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Re: ZL1 correct carburetor
Thats what I figured, but its a new ZL-1 carb and thats OK with me
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1969 9566AA COPO Chevelle M-22 1969 Malibu 489 ZL-1 T-56/4.56 1969 Beaumont 540 th400 3.70 1969 Chevelle 300 Deluxe 427 ZL-1 M 22W 1970 Olds 442 W 30 2 door post 1969 Ply. GTX 426 hemi auto. Blue. 1940 Dodge pick up Durango 4X4 1968 Camaro ragtop LSA ZL1
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#5
09-02-2008, 05:02 AM
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Re: ZL1 correct carburetor
When discussing ZL-1 Camaro carbs "correct" and "how they were built" are different.
Perhaps due to the ducted hood air cleaner interfering with the rear pump on the #4296 many if not all were built with the L72/L78 #4346 carb. Fred Gibb stated this in an interview many years ago and photos of the #3 Berger ZL-1 confirm it. The #1 ZL-1 flunked Tech at the Phoenix AHRA meet because the AMA specs listed the #4296 and the car still had the OE carb. Which carb should a properly restored ZL-1 Camaro have? You decide.
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Learning more and more about less and less...
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#6
09-02-2008, 05:25 AM
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Re: ZL1 correct carburetor
The ones build with the 4346 carbs has the correct 4296 carbs serviced installed on them.
Jason
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#7
09-08-2008, 12:11 AM
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Re: ZL1 correct carburetor
[ QUOTE ]
When discussing ZL-1 Camaro carbs "correct" and "how they were built" are different. Perhaps due to the ducted hood air cleaner interfering with the rear pump on the #4296 many if not all were built with the L72/L78 #4346 carb. Fred Gibb stated this in an interview many years ago and photos of the #3 Berger ZL-1 confirm it. The #1 ZL-1 flunked Tech at the Phoenix AHRA meet because the AMA specs listed the #4296 and the car still had the OE carb. Which carb should a properly restored ZL-1 Camaro have? You decide. [/ QUOTE ] This brings about a great point. I remember hearing this 4346 vs. 4296 carb controversy here on this site years ago. I was amazed! Why would GM spec a carb ( i.e 4296 ) that clearly did not operate with the ZL/2 induction system for the reason you mentioned. For the purists here ( I'm one too ), I'd have to go with the 4346 because that is the carb the engines came factory equipped with. What have the ZL-1 owners done to their air cleaner bases to allow the secondary pump assembly to operate properly? I'd like to hear from some owners.....  Nuch
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#8
09-08-2008, 12:32 AM
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Re: ZL1 correct carburetor
Using a thick gasket on the carb is one solution.
The problem is not all that obvious. The 90º tube may compress the rear pump lever somewhat resulting in a constant trickle of fuel. The poor idle and fouled plugs are written off to "that's how they were." Another ZL-1 restoration error is to run a heat riser. We ran the #4296 with the 2nd design air cleaner and the car started right up and idled smoothly.
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Learning more and more about less and less...
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