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Spread-Bore Carbutetor Performance Upgrade Options

Holley offers various options to replace your square-bore (Quadrajet) carburetor for a Holley spread-bore carburetor. You can also perform a spread-bore to square-bore swap.


 


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Carburetor vs Fuel Injection - Summit Racing 101
What is the difference between a carburetor and fuel injection? Listen as Dave guides you through 2 barrel carbs, spread bore carbs, race carbs and compares them to EFI. To check out Summit Racing's selection of carburetors, click here: http://www.summitracing.com/redirect?banner=SocialYT4540 For Fuel Injection EFI systems, click here: http://www.summitracing.com/redirect?banner=SocialYT4541





How to de-bog your Quadrajet part 2
The Rochester Quadrajet has gotten a bad rap over the years, but it's actually an excellent carburetor once you understand how they work. Often referred to as "Quadrabog" or "Quadrajunk", many of the issues these units suffer stem from neglect, or "modifications" that do more harm than good. Being a spreadbore, air-valve secondary design, the Quadrajet is capable of flowing 750 or 800 cfm of airflow, eliminating the need to buy different carburetors when your set-up changes. In addition, the small primaries make for great drivability and fuel economy. In this clip, I'll discuss theory of operation on the secondary side, since that's where most problems arise. So, leave your preconceived notions at the door and let's see what makes these carburetors tick.





Edelbrock Intake Manifold Dyno Test :: Single Vs Dual + Air-Gap Vs Regular
Edelbrock single plane (Victor Jr) vs dual plane (Air-Gap) intake manifolds on the same engine in a Dyno test at Westech Performance. Plus a test of the Air-Gap vs Regular dual plane intake manifolds. This is an episode I edited.





650 spreadbore Holley carb.
This is a Holley spreadbore double pumper carb that is being tested on a running engine. Tis was filmed on an ipad2.





Dual-Plane vs. Single-Plane Intake Manifolds - Summit Racing Quick Flicks
Learn the main advantages and performance expectations of the two main styles of automotive intake manifold: single-plane and dual-plane intakes. Single Plane Intake Manifold - http://www.summitracing.com/redirect?banner=SocialYT459 Dual Plane Intake Manifold http://www.summitracing.com/redirect?banner=SocialYT460 Edelbrock Performer Intake Manifold - http://www.summitracing.com/redirect?banner=SocialYT461 Edelbrock Victor Jr Intake Manifold - http://www.summitracing.com/redirect?banner=SocialYT462





Holley 4150 Street HP carb rebuild- Tear- Down-Part 1/3
here is a video i made when I rebuilt my Holley 4150 Street HP carburetor that I purchased at a swap meet. It turns out it was in very clean condition and would not have needed rebuilding but I wanted to make sure it was clean inside. It was a good experience doing the rebuild. It's always good to learn something new. I am not a pro and this is my first Carb teardown so those folks that feel compelled to say what is wrong with what they see, please don't bother. Remember what your Mom said, "if you can't say something nice..."





Vacuum Lines Connection
Footage taken from Holley Carburetor Installation & Tuning DVD





How to clean motorcycle carburetors
Longtime viewers will see this as a refresher, but it does have some new tips not included in my previous carb videos





Holley Carburetor Performance Tune - Summit Racing Quick Flicks
Norm covers all of the tips to get the most out of your Holley Performance Carburetor. He covers how to tune your Holley Carb for high horsepower and racing applications. He even goes over advanced power valve and jet tuning for the Holley Carburetor. http://www.summitracing.com/redirect?banner=SocialYT4536





How And When To Change The Jets On A Holley Carb
Holley explains how the main jets on a four-barrel carburetor operate. They also give instructions on changing the jets for increased performance. The video explains the various jet sizes, and how they affect engine performance.





How Motorcycle Carburetors work and how to tune and clean them
Here's a link to the kind of carb cleaner I like best (it IS the best) http://www.amazon.com/gp/product/B002ERT666/ref=as_li_qf_sp_asin_il_tl?ie=U TF8&camp=1789&creative=9325&creativeASIN=B002ERT666&linkCode=as2&tag=httpww wyou00f-20 hey... awesome video..nicely explained ! just one question. Please do tel me wts AIR NEEDLE and LOW JET used for again. ? i mean how and what do they work? thanx :) Reply · The air needle is like a transitional restriction to increase vacuum pressure and tapered to prime the main jet flow gradually to ramp up fuel flow from the idle/low circuit to the main circuit. Think of the circuits like gears or stairs. The needle covers transition between 3rd gear to about 5th gear on a six speed. It overlaps basically. Fuel is getting by it from the idle/low- on through to where it's completely out of the way of the main jet and the main jet fuel flow is roaring like the straw/compressor example. Without the needle the carb would work, but not as smoothly through middle throttle (where most people ride and have the most fine input or throttle roll back and forth. The low jet is like second gear on a transmission. You can shift from 1st to 3rd, but again you risk stalling and it won't be as smooth. Also there isn't really the mechanical inertia to carry the process on like you have with a rolling vehicle with a flywheel on the engine and the wheels turning. The pistons still create vacuum every other time they go down, but air just doesn't have the punch that steel does when in motion. The circuits in a carburetor have to be there or you would have a limit on RPM range. An idle jet can't deliver enough fuel to really scream, and the main jet couldn't go slow and would be VERY hard to start because the engine would have to be spun up really fast. So you have usually four or five circuits (I want to say jets, but their physically different) that get air flow like stairs as the throttle opens. They are typically 1. Starting circuit (choke on) 2. Idle circuit 3. low jet 4. Jet Needle 5. Main jet. How Motorcycle Carburetors work and how to tune and clean them Check out my other channel here http://www.youtube.com/watch?v=1KKvwMaIotA





Attaching Early GM Throttle Linkage To Holley Carbs
There are various types of throttle linkages on early GM cars that attach differently to a Holley carburetor. Here are some tips to attach a variety of GM model throttle cables with different transmission applications.





Edelbrock Carburetor Installation and Troubleshooting Part 3 - Installation 1
Edelbrock Performer Series and Thunder Series AVS carbs are the most reliable, trouble-free carbs available today, however proper installation and tuning will ensure that you get all the performance you want from your engine. Whether this is your first carb installation or you've been doing it for years, this video shows you how to install the carb on a variety of intake manifolds, how to check linkage and vacuum line hook-ups, set the idle speed and mixture, and help you diagnose any potential trouble spots. In some cases, additional tuning will be required to calibrate the carburetor for your unique requirements, and this video shows in detail just how easy it is to get the carb perfectly "dialed-in" for your combination. http://performanceparts.com/ http://www.edelbrock.com/automotive_new/misc/tech_center/install/tech_vids. shtml http://performanceparts.com/vendors.php?vendor=ELB





Motorcycle Mikuni CV Carburetor Cleaning for Suzuki, Honda, Yamaha Tutorial
Links below. Step by step instruction on how to disassemble, clean and assemble Mikuni CV Carburetors for Suzuki, Honda, Yamaha motorcycles... I hope you find this tutorial informative if long. For parts for your Vintage Japanese Motorcycle, please visit http://z1enterprises.com These guys always have the best prices and fastest shipping. Thank you for watching. Anti Seize Lubricant http://amzn.to/1bKe5HH





Carburetor Rebuild Basics (Part 1) -EricTheCarGuy
Carburetor Rebuild Basics covers the basics of rebuilding a carburetor. Now there are a LOT of different carburetors out there so this video won't apply to all of them, but it will give you a general idea of what you would be in for if you decided to rebuild one. Me, I like rebuilding carburetors. There's something about mechanical things like carburetors that interest me. How even the smallest part has a big effect on the overall operation of your engine. Since we've gone to fuel injection carburetors have become somewhat obsolete. I'm still a fan though. I may be a little rusty on this stuff since I haven't done this in some time but I hope this video helps you just the same. If nothing else, I hope you're entertained by it. Camera: Brian Kast The best place for answers to your automotive questions: http://www.ericthecarguy.com Related videos. Carburetor Rebuild Basics (Part 2): https://www.youtube.com/watch?v=dprLQcQrAqE If you want to see the full version of this video with additional footage now, become a Premium Member of EricTheCarGuy.com: http://www.ericthecarguy.com/premium-content-streaming-etcg-content The Basics of Carburetor Adjustment: To be added August 8, 2014 Cleaning Throttle Bodies: https://www.youtube.com/watch?v=41yFXjibtLY Solving Performance Problems 1: http://www.youtube.com/watch?v=rsGTeWayqIU Solving Performance Problems 2: http://www.youtube.com/watch?v=sAKwCzUE_9M Re Performance Problems: http://www.youtube.com/watch?v=_vAJi5rLMGY Related articles. Idle issues: http://www.ericthecarguy.com/faq/solving-automotive-idle-problems Performance issues: http://www.ericthecarguy.com/faq/solving-automotive-performance-issues Getting Better MPG: http://ericthecarguy.com/faq/finding-and-fixing-the-causes-of-poor-mpg Discussion about this Video: http://www.ericthecarguy.com/kunena/18-The-EricTheCarGuy-Video-Forum/52544- carburetor-rebuild-basics The best place for answers to your automotive questions: http://www.ericthecarguy.com ETCG FAQ Page: http://www.ericthecarguy.com/faq EricTheCarGuy code lookup: http://www.ericthecarguy.com/obd-code-lookup Facebook: https://www.facebook.com/EricTheCarGuy?fref=ts Twitter: https://twitter.com/EricTheCarGuy Google+: https://plus.google.com/100195180196698058780/posts Information on Premium Membership: http://www.ericthecarguy.com/premium-content-streaming-etcg-content Stay Dirty ETCG Due to factors beyond the control of EricTheCarGuy, it cannot guarantee against unauthorized modifications of this information, or improper use of this information.  EricTheCarGuy assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. EricTheCarGuy recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video.  Due to factors beyond the control of EricTheCarGuy, no information contained in this video shall create any express or implied warranty or guarantee of any particular result.  Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not EricTheCarGuy.





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