Per the feedback in a previous thread, it seems like the consensus is that the Carter 4028 AVS was likely the original carb for a '66 Beaumont 275hp 327. As I know nothing about carb's, my question is... Any thoughts on how the performance of the Carter 4028 would compare to that of a Carter 9625? Feedback is appreciated. thx gw
-- Edited by 03cts sport on Monday 20th of December 2010 07:35:52 PM
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"So when you spot violence, or bigotry, or intolerance or fear or just garden-variety hatred or ignorance, just look it in the eye and think... The good outnumber you, and we always will." Patton Oswalt
looks like the 4028 is around 500cfm and 9625 is 625 cfm On a stock or close to stock, both would work well... My 427 runs a 650 Holley and doen't run out of fuel until 150mph.
Thanks for the feedback Carl. As I'm in need of a rebuild for my carb (the 9625 which replaced the factory 4028), I'm thinking that I should probably source a rebuilt 4028. Would you agree with this rationale?...
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"So when you spot violence, or bigotry, or intolerance or fear or just garden-variety hatred or ignorance, just look it in the eye and think... The good outnumber you, and we always will." Patton Oswalt
yes!! I had never seen a 327-275 with anything but a Quad..
I owned a 69 Z28 in 1979 I had bought it rolling, and put a almost new 79 350 in it It had a Quad... When i bought it back in 1984 it had a Carter on it off a Ford and it was a great carb...
Thanks for the feedback Carl and Carl! I'm glad you chimed in 65sssd. Out of curiousity, does your '66 327 SD have the original carb? If so, is it a Carter 4028?
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"So when you spot violence, or bigotry, or intolerance or fear or just garden-variety hatred or ignorance, just look it in the eye and think... The good outnumber you, and we always will." Patton Oswalt
Ahh, good point. It was a different number. I'm curious though as to what the number is (providing it's the original carb) and if it is indeed an AVS?...
4027 for the standard and 4028 for the PG (according to the book. Interesting that in some areas they refer to them as 4027S and 4028S?)
-- Edited by 03cts sport on Tuesday 21st of December 2010 12:16:03 AM
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"So when you spot violence, or bigotry, or intolerance or fear or just garden-variety hatred or ignorance, just look it in the eye and think... The good outnumber you, and we always will." Patton Oswalt
The 4028 AVS carb was 575 CFM . The early AFB carb flowed around 500 CFM the secound design AFB was larger had a 5.5 in air cleaner base and flowed close to 600 CFM. The AVS used in 66 flowed around the same 575 to 600 CFM .
"So when you spot violence, or bigotry, or intolerance or fear or just garden-variety hatred or ignorance, just look it in the eye and think... The good outnumber you, and we always will." Patton Oswalt
Any tips on what I should be looking for to ensure that I get the right 4028 AVS carb?
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"So when you spot violence, or bigotry, or intolerance or fear or just garden-variety hatred or ignorance, just look it in the eye and think... The good outnumber you, and we always will." Patton Oswalt
The 4028 AVS carb was 575 CFM . The early AFB carb flowed around 500 CFM the secound design AFB was larger had a 5.5 in air cleaner base and flowed close to 600 CFM. The AVS used in 66 flowed around the same 575 to 600 CFM .
Interesting info. Thanks for sharing! I do recall once the 9625 was installed that the car had to be in the higher RPM's before it would take off. I guess this makes sense considering the larger size...
-- Edited by 03cts sport on Tuesday 21st of December 2010 12:39:02 AM
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"So when you spot violence, or bigotry, or intolerance or fear or just garden-variety hatred or ignorance, just look it in the eye and think... The good outnumber you, and we always will." Patton Oswalt
My chevy by the numbers book says that the four digit number is always followed by the S and sometimes SA and SB. There not sure what the S stands for but if it has the A it means the first level of engineering revision the B designates the secound level of revision.
If your lucky and the carb still has its tringular metal ID tag still on it. The GM part number should be on it and under that the four digit carb number. Shows 4027 as GM 3876749 and 4028 as GM 3875966.
-- Edited by Beaumont4008 on Tuesday 21st of December 2010 12:48:25 AM
Thanks again for the info Ian. I'll be looking for a 4028SA or 4028SB. Thanks muchly guys!
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"So when you spot violence, or bigotry, or intolerance or fear or just garden-variety hatred or ignorance, just look it in the eye and think... The good outnumber you, and we always will." Patton Oswalt
Not sure if it's the same as 65 as far as how they mark the numbers but my 300 horse 65 carb has the number stamped in the base. Seems to me it's a 3721SA for that one. Easy to spot on the front of the base.
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
Not sure if it's the same as 65 as far as how they mark the numbers but my 300 horse 65 carb has the number stamped in the base. Seems to me it's a 3721SA for that one. Easy to spot on the front of the base.
My book shows the SA suffix was added in Nov.of 64 and used until late model year of 65 when it was replaced with SB. Looks like your carb is spot on to what you needed for you car.
It's been a few years since I bought it but I remember checking it and thinking it was bang on. And now it sits on the shelf cause I ended up putting on the 69 Z28 intake and a 600 Holley!
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
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