Tuning Dual Carbs on my Big Block Chevy With Science! @FinnegansGarage

Uploaded July 2025 | Updated September 2026, 1 hour ago

Episode 362 of Finnegan's Garage is full of super nerd engine tuning information. We used a Racepak IQ3 data-logging dashboard to record the information from 10 different O2 sensors mounted in our headers to find out how each individual cylinder of the 632ci Big Block Chevy was running. We then used the info to make adjustments to a pair of Holley Gen 3 1,250cfm Dominator carburetors mounted atop a tunnel ram intake manifold. The results were stunning!

Want more info about Gen 3 Dominator Carbs? Go here:
holley.com/products/fuel_systems/carburetors/dominator/1_x_4_gen_iii_ultra_dominator/parts/0-80908HB

Want more info about the Racepak IQ3 Data Logger Dash? Go here:
holley.com/products/data_acquisition/digital_dashes/digital_dashes/parts/250-DS-IQ3LD

Want to a Racepak dash mount like the one that Ralls Precision Machine made for us? Go here: rallsprecision.com

Want to support the channel? Buy our apparel here: fsmgarage.com

Thanks for watching!

-Finnegan

Tuning Dual Carbs on my Big Block Chevy With Science!

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$WILL IT RUN? WILL IT DRIVE? This is episode 320 of Finnegans Garage and its the big reveal of our 1998 GMC Sierra work truck. With hours to spare we got it running, driving, and looking minty fresh before the huge SEMA show in Las Vegas, Nevada. Now its time to fly to Sin City to check out the show and see our 13,341 mile truck under the lights. Thanks to everyone who helped restore this OBS truck in a short amount of time including David Williams, Joe Cole, Chastin Brand, and Derek Peyton. If youd like more info on any of the cool parts we installed onto our 1998 GMC Sierra truck in this video then go here: Fuel Pump: https://aeromotiveinc.com/products/fuel-pump-intank-dual-340-88-97-chevy-truck-1500-2500 Fuel Tank:https://www.summitracing.com/parts/RNB-576-343 Supercharger: https://www.harrop-usa.com Engine Accessories: https://www.cvfracing.com Suspension: https://ridetech.com Wheels: https://www.billetspecialties.com/store/wheels/tec-series-wheels/item/tec-5/ Tires: https://www.falkentire.com/azenis/fk510 MSD Sold State Relays: https://www.holley.com/products/electrical/wiring_and_relays/parts/7564 Eastwood fender rolling tool:https://www.eastwood.com/ew-fender-roller-w-instruction.html Dogfab bead roller: https://furickcup.com/product/k2-bead-roller/ Paint Correction: Concept Collision of Acworth, Georgia Grille: https://www.autometaldirect.com Snap-on Radiator hose clamp pliers: See your local Snap-On rep$

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