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Old 01-11-2007, 07:27 AM   #1 (permalink)
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Holley 4010/4011 good,bad,ugly?

Has anyone used one of these carbs? They dont seem very popular and couldn't have been built for very long. I have always liked the drivability factor of a spreadbore carb but have little experience or luck with q-jets. Do these holleys take standard holley jets and tuning theory? Thanks.
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Old 01-11-2007, 07:53 AM   #2 (permalink)
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Holley 4010/4011 good,bad,ugly?

IIRC the jets and most parts swap.....but I think the metering blocks are a bit different. They tune like holleys not q-jets, which makes them fun to mess with. I think they were mostly a factory carb on big chevy's. Your best info will be from a holley tuning manual.
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Old 01-11-2007, 09:30 AM   #3 (permalink)
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Holley 4010/4011 good,bad,ugly?

I've had good luck with them, though they're not that popular. The main problem I've seen with them is a vapor lock problem, that seems to be why they've gotten kinda a bad rep, and never caught on. That's a simple fix though, just run an insulating carb spacer. The only other issue with them, is that the squirter selection is limited to what came on the carb since the squirters, and the boosters are one piece. A person could drill out the squirters as needed though. These carbs take standard holley jets, and accelerator pumps, and power valves. It's based off of the ford/motorcraft 4bbl carb, has a lift off top.

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[ This Message was edited by: Matt on 1/12/07 4:40am ]
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Old 01-11-2007, 01:18 PM   #4 (permalink)
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Holley 4010/4011 good,bad,ugly?

Years ago I ran one on a 289. Good gas mileage and impressive when the secondaries open up. It's recommended that you don't use an adaptor to mate to your intake, but I did.
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Old 01-11-2007, 01:18 PM   #5 (permalink)
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Holley 4010/4011 good,bad,ugly?

I had a new 4011 vacuum secondary spread bore. It was a very responsive carb, but I could never keep the vacuum secondaries from sticking open when the motor got warm. It was a heat issue that I couldn't lick even using a thick gasket. I finally gave up on it and went with an old school 4175 which I still run 15 years later.
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Old 01-11-2007, 02:33 PM   #6 (permalink)
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Holley 4010/4011 good,bad,ugly?

I agree.I had good luck with 2 and 1 wasn't so good. They actually came with a thick insulating gasket to stop heat soak in my case...
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Old 01-11-2007, 03:31 PM   #7 (permalink)
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Holley 4010/4011 good,bad,ugly?

Quote:
On 2007-01-11 07:53, carsnguitars wrote:
IIRC the jets and most parts swap.....but I think the metering blocks are a bit different. They tune like holleys not q-jets, which makes them fun to mess with. I think they were mostly a factory carb on big chevy's. Your best info will be from a holley tuning manual.
Um - there are no metering blocks in a 4010/4011. And they were not a factory carb on anything that I know of. These were good carb, looking like 4100 knockoffs. I ran a 750 VS model (84011) and it always worked good. The big annular boosters make it a good street carb. I retired it due to lack of major parts availability. You can use the vacuum can, jets and accel pumps from regular Holleys. The accel pump shooter is an assembly and not serviced anywhere (even Holley Reman), so if you need to change your shooter size - get some drills and a pin vise.
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Old 01-11-2007, 05:59 PM   #8 (permalink)
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Holley 4010/4011 good,bad,ugly?

Thanks for all the feedback, thats what I was looking for. I've seen a few on ebay, 650 and 750 cfm. Did they make any other sizes?
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Old 01-11-2007, 06:30 PM   #9 (permalink)
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Holley 4010/4011 good,bad,ugly?

No, that is the only two sizes they made. I still run one of each. The 4011 has worked perfect since the first time I used it. I had trouble with the 4010 from day one, a terrible off idle flat spot and the motor would not pull past 5000. I tired it on a couple of motors ( a 427 and a 351 cleveland). I did not give up on it though since the 4011 worked so good, after trying every "trick in the book" I took the primary boosters off of an autolite 4100 and put them on the 4010. I put it on the 427 (which currently has a proform that works great) and the 351 and both motors pull harder through 6000 than with any other carb I have used, plus those big annular boosters give a great part response too, plus you don't have the warpage problems that occur over time with the conventional holleys. I like the 4010/4011 but you might get one that is a royal pain until you get it worked out. Probably not what you want at the strip on a motor pulling a lot of rpm but on the street the 4010 can be a monster (the 4010 is rated at 750cfm and the 4011 is rated at 650cfm).
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Old 01-12-2007, 07:01 AM   #10 (permalink)
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Holley 4010/4011 good,bad,ugly?

Quote:
On 2007-01-11 15:31, ckelly wrote:
Quote:
On 2007-01-11 07:53, carsnguitars wrote:
IIRC the jets and most parts swap.....but I think the metering blocks are a bit different. They tune like holleys not q-jets, which makes them fun to mess with. I think they were mostly a factory carb on big chevy's. Your best info will be from a holley tuning manual.
Um - there are no metering blocks in a 4010/4011. And they were not a factory carb on anything that I know of. These were good carb, looking like 4100 knockoffs. I ran a 750 VS model (84011) and it always worked good. The big annular boosters make it a good street carb. I retired it due to lack of major parts availability. You can use the vacuum can, jets and accel pumps from regular Holleys. The accel pump shooter is an assembly and not serviced anywhere (even Holley Reman), so if you need to change your shooter size - get some drills and a pin vise.
Sorry. Obviously, I need to get new glasses so I can look up the right numbers next time.
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Old 01-12-2007, 08:44 AM   #11 (permalink)
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Holley 4010/4011 good,bad,ugly?

I've got new glasses - and it doesn't always help LOL
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