Project True SStreet, our in-house 2014 Chevrolet Camaro SS project car, has had a number of upgrades to nearly every part of the car during its tenure in our shop. In this project installment, we’re addressing the fuel system, which has had additional demands placed upon it to support recent increases in horsepower.
With a larger displacement engine and bigger power goals in mind, Project True Street needed an upgraded fuel system to meet the demands.Holley had just the right components in its VR brushless fuel system series to make it happen. Holley’s fabricated aluminum 10-gallon fuel cell will provide plenty of fuel, and it also features a flange that allows the Holley fuel pump module we chose to bolt right in.
This project began back in 2015, when the original 376 cubic-inch LSX engine was fitted with a 4.5-liter Whipple supercharger and bolted to an engine dynamometer. With a 4-inch-diameter pulley and 3.75-inch lower, the 376 churned out 1,079 horsepower at 24 psi of boost pressure while burning C16 racing gasoline.
The Camaro was outfitted with a fuel system that was designed to meet the needs of our nearly 1,100-horsepower engine combination when running on E85, which would require an even greater volume of fuel.
While the fuel system was ready to deliver what was needed for the 376 cubic-inch powerplant, the project was later upgraded with a 427 cubic-inch LSX bullet with Brodix BR7 cylinder heads before Project True SStreet ever hit the track. After a few passes and pulley changes to the Whipple supercharger, we knew the limit of the fuel system had been reached.
Starting out with the 5-inch pulley on the 4.5-liter Whipple blower, the 427 saw 11 psi of boost pressure and Project True SStreet clicked off a 5.90-second 1/8-mile time and went through the 1/4-mile clocks at 9.30 seconds.
Looking to turn up the wick, a 4.25-inch pulley was bolted on next. The 18 psi of boost pressure outpaced the fuel delivery, unfortunately, and the air/fuel ratio went too lean for our liking, and to be safe for the engine long-term. It was time to upgrade the fuel system once more.
Fattening Up The Fuel System
Obviously, we’re not talking about a fat air/fuel ratio, but we are talking about beefing up the fuel system components to ensure Project True Street has plenty of fuel to complete the quest for lower elapsed times.
To that end, we turned to Holley to better equip this Camaro and to help us extract the maximum performance available from the…
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