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Username Post: l79 holly carb        (Topic#349313)
otis3 
Forum Newbie
Posts: 67

Reg: 04-29-14
01-24-18 06:30 PM - Post#2722017    

is there anyway to get this carb to flow more air?



 




IgnitionMan 
Valued Contributor
Posts: 3257

Reg: 04-15-05
01-25-18 06:51 AM - Post#2722068    
    In response to otis3

The only way to get the carb to "flow" to its total potential is to get the entire intake system to it's full 'suction' potential for any and all RPM areas of operation.

A lot more engine and drive train info is needed, whatcha runnin'?



 
otis3 
Forum Newbie
Posts: 67

Reg: 04-29-14
01-25-18 01:41 PM - Post#2722114    
    In response to IgnitionMan

it is a 1965 chevelle with327,350 hp.motor is factory stock.have been told by several owners that bigger carb really makes this engine come alive.so was wondering if could do something to increase air flow and still retain stock carb.thanks.331 gears with 4 speed.



 
jdk 
"9th Year" Gold Supporting Member
Posts: 425
jdk
Age: 68
Loc: columbus, ohio
Reg: 02-15-10
01-25-18 04:05 PM - Post#2722123    
    In response to otis3

didn't they come with a 585 cfm holley?
they ran great out of the factory. jim



 
IgnitionMan 
Valued Contributor
Posts: 3257

Reg: 04-15-05
01-25-18 05:58 PM - Post#2722139    
    In response to otis3

If the stock Holley is still in place, lift the air filter off the carb. On the front of the choke housing, driver side, read the LIST number off the, please, and post it for us.

Those 327/350's were nice runners, and I think they had a larger carb than people realized they had.

Examples:

LIST - 1850 is a 600 cfm

LIST - 4776 is an aftermarket 600 cfm double pumper

Some LIST numbers have suffixes, such as LIST - 4776 - 2, - 3, etc.

There is also a number/letter code as well, please post that, and we might be able to tell you the build date of the carb.

The LIST number will identify just what carb it is.



 
otis3 
Forum Newbie
Posts: 67

Reg: 04-29-14
01-25-18 07:35 PM - Post#2722153    
    In response to IgnitionMan

the no. on my carb is 1850-2



 
IgnitionMan 
Valued Contributor
Posts: 3257

Reg: 04-15-05
01-26-18 04:23 AM - Post#2722163    
    In response to otis3

That carb is an aftermarket 600 cfm. It is derived from the original LIST-1850 carb that was the OEM carb for a 430 Lincoln engine from the early 1960's.

The -2 indicates the second redesign, possibly small changes to make it more universal.

That carb is a good one, but too small for the 327/350 engine. That engine would work better with a Holley of 730 cfm, or one of the -2, -3 LIST -3310 750 cfm.

The LIST-3310 was also an OEM carb for the first 396/375 engines, the dash made them aftermarket ready. LIST-3310 and -1 were rated at 780 cfm, the -2 and above we're flow tested at a different air speed, and re-rated down to 750 cfm.

Please remember, both the engines mentioned here were fairly serious performance designed, with compromises to low end efficiency, in favor of higher RPM operation.

The LIST-1850 was more than likely installed for one or both reasons, to attempt to gain better low end efficiency and drive ability, and/or, someone couldn't get the stock Holley to work. Many people create more problems than can be overcome, literally listening to "super tuning inside info" that really never worked in the first place.

The stock larger carbs worked well for both engines mentioned, usually right up to being "super tuned" to failure.



 




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