Today we tackle the age-old question: What's better, carburetors or EFI? Electronic fuel injection has many advantages when it comes to producing great driving quality in all conditions, but what can the engine dyno tell us about horsepower?

Here's a link to view the full build with the carburetor:    • Easy 550-Plus Horsepower Chevy Build ...  

We test a couple of Holley four barrel carburetors on an Edelbrock Victor Jr. single-plane intake against a custom setup utilizing four dual-injector units from Borla Induction. Both are on 400 cubic inch small block Chevrolets with Molnar crank and rods, Mahle pistons, AFR heads, and a Crane Cams valvetrain. The stack injection EFI is run by a FAST electronics system.

Keith Dorton and Automotive Specialists did all the work and dyno testing. You can check them out at http://www.automotivespecialists.com/

Also, this is a working engine shop, so please excuse the background noise in the first minute of the video.

Here are some of the major components used in the builds:
Dart SHP block: https://amzn.to/2RiI7yq
Mahle Forged piston set: https://amzn.to/2Rkeqgf
AFR Eliminator cylinder heads: https://amzn.to/36nafEE
Edelbrock Victor Jr intake: https://amzn.to/2RGHjSQ
MSD Pro Billet distributor: https://amzn.to/2vhZXJh
Brawler Carburetor: https://amzn.to/2sW709O


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TIMESTAMPS:
0:00 - Introduction
1:00 - Dart SHP block, Molnar crank and connecting rods & Mahle pistons
1:33 - Crane Cams hydraulic roller valvetrain
2:04 - AFR Eliminator Street aluminum cylinder heads
2:50 - Carbureted setup w/ Holley carbs and Edelbrock Victor Jr single-plane intake
4:07 - Holley 750 Brawler carburetor vs Holley 830 cfm double pumper
4:43 - Borla Induction fuel injection setup
5:00 - MSD Cam Sync
5:23 - FAST (Fuel Air Spark Technologies) ECU, Ignition controls and coils
8:16 - Carb vs EFI dyno test