hemi
Heat Winner
Posts: 300
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Post by hemi on Jun 12, 2013 17:45:06 GMT -5
Have used both in the past 21 years of derbying,both have treated me good.
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cp87
Future Icon
Posts: 149
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Post by cp87 on Jun 12, 2013 18:26:21 GMT -5
Holley 500,plenty of carb!!
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rad1
Heat Winner
Posts: 297
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Post by rad1 on Jun 16, 2013 10:49:26 GMT -5
wondering this myself. mmm? i just finished a sweet sbc solid roller engine. i bought a holley 770 truck avenger carb and had engine dynoed with it. i don't know yet how it will do in the derby but dailed in on dyno its impressive!
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Post by sonsteby31 on Jun 19, 2013 22:05:41 GMT -5
He's asking why do you guys choose one over the other. So can anyone answer WHY they choose one over the other?
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Post by bigblocker17x on Jun 21, 2013 3:22:19 GMT -5
better throttle response from a 2 barrel carb in derby application and less moving parts and easier to rebuild quickly or replace parts on if needed at the track, and ive heard and talked to guys that say that the 4 barrels have more problems with dieing when getting hit, most of your time is spent in the lower rpms in derbying so do you really need the secondarys to open up?
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Post by C4 on Jun 21, 2013 14:24:30 GMT -5
^^^^^^Same reasons I mentioned on page 1...with our application, who care what it will do when you punch it at 80 mph? 0-40 is everything for us.
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Post by clong527 on Aug 10, 2013 12:19:12 GMT -5
IMO a 2bbl has better response plus I have seen 4 bbls flood when the car starts to horn up. Stick to the basics this is not NASCAR!
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leadfoot455
Heat Winner
I drive this way on purpose!
Posts: 604
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Post by leadfoot455 on Aug 10, 2013 12:28:12 GMT -5
This will be my first year running a 2bbl. I'll letya know what i think
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Post by fordpower111 on Aug 10, 2013 21:00:05 GMT -5
I'll stick with the 4 barrels.
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Post by blackmopar21 on Aug 10, 2013 22:24:45 GMT -5
Quick fuel= no flooding, dieing when hitting, $$$$ yes but a phenomenal 4 barrel that's reliable. You can't go out with a stock 4 barrel and expect it to perform at high standards, won't happen. So therefore when people do they try to give them a bad name.
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Post by fordpower111 on Aug 10, 2013 22:43:07 GMT -5
Hell! i never had a problem with a stock 4 barrel that i can remember. One motorcraft and the rest are Holley. The Quick fuels are nice and are holley based.
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improse
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Post by improse on Aug 10, 2013 22:48:53 GMT -5
Been running a 2 barrel for 27 yrs.Same gm 2 barrel for 10+ yrs with no problem.4's load up to much for me,i like my motor to fire up right now,if it even stalls.But i've seen guys run 4's with great results,if they are tuned right.Will stay with my trusty gm 2 barrel.
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dm440c
Feature Winner
derby drivers against drama- there's no crying in demo derby!
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Post by dm440c on Aug 21, 2013 16:27:12 GMT -5
the question is not "2 bbl vs. 4 bbl" , the question is about a particular model of carb vs. a different model. By that I mean you can debate Holley 4412 vs. Rochester Quadrajet or Holley double pumper vs. Edelbrock Performer etc etc etc but to debate general 2 bbl vs. 4 bbl is silly. Tuning and reliability matter so much more than whether it is a 2 bbl or a 4 bbl, so just go with a carb that you are familiar with so that you can tune it and make it reliable, the rest doesn't matter near as much as most people think it does.
So many times a topic like this comes up and what you get is a bunch of guys who don't know how or why, they just know that so-and-so runs these parts so they must be the best, and even though they have no idea what they are talking about they will tell you that this particular thing is what you have to have. At best they can tell you that they have run a certain item and it has worked for them but the rest of their opinion is unqualified because quite frankly they do not know why something works or why or if something else doesn't work.
A sure way to sniff out the BS on the topic of carbs is when someone starts talking about the CFM... it's amazing how few people understand how this works, most assume that CFM is directly proportional to horsepower but that is myopic to put it kindly. If you tried to explain volumetric efficiency to them their eyes would roll around in their heads and they would go right back to assuming a carb with a higher CFM rating will make more power. Debating 2 bbl vs 4 bbl is similarly useless.
Let's start over, do you have a type of carb that you are familiar with and satisfied with? My advice is to stay with that and figure out how to tune it to your engine.
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Post by kemble on Aug 21, 2013 16:35:56 GMT -5
yeah the cam is mild the motor has a lot of things done to it but still just wondering about putting a 2bbl on it That adds up to 250 hp, But to add to the thread any carb is capable of performing well. Its about being tuned for the engine and setup correctly.
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Post by STROMI 121 on Aug 21, 2013 19:31:32 GMT -5
the question is not "2 bbl vs. 4 bbl" , the question is about a particular model of carb vs. a different model. By that I mean you can debate Holley 4412 vs. Rochester Quadrajet or Holley double pumper vs. Edelbrock Performer etc etc etc but to debate general 2 bbl vs. 4 bbl is silly. Tuning and reliability matter so much more than whether it is a 2 bbl or a 4 bbl, so just go with a carb that you are familiar with so that you can tune it and make it reliable, the rest doesn't matter near as much as most people think it does. So many times a topic like this comes up and what you get is a bunch of guys who don't know how or why, they just know that so-and-so runs these parts so they must be the best, and even though they have no idea what they are talking about they will tell you that this particular thing is what you have to have. At best they can tell you that they have run a certain item and it has worked for them but the rest of their opinion is unqualified because quite frankly they do not know why something works or why or if something else doesn't work. A sure way to sniff out the BS on the topic of carbs is when someone starts talking about the CFM... it's amazing how few people understand how this works, most assume that CFM is directly proportional to horsepower but that is myopic to put it kindly. If you tried to explain volumetric efficiency to them their eyes would roll around in their heads and they would go right back to assuming a carb with a higher CFM rating will make more power. Debating 2 bbl vs 4 bbl is similarly useless. Let's start over, do you have a type of carb that you are familiar with and satisfied with? My advice is to stay with that and figure out how to tune it to your engine. What is volumetric efficiency...LOL I agree 100% with Dan on this one. Use whatever works best for you and your setup. Personally, I have had great luck with Eldelbrock 4bbls and Rochester and Holly 2bbls. What matters most is knowing how to properly set up, tune, and jet whichever carburetor you are running.
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