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The 454 cubic-inch 7400 Vortec V-8 GM motor, which produced 290 horsepower at 4,000 rpm and had 410 pound-feet of torque at 3,200 rpm, was a smooth four cylinder without much difference between the top and bottom. the Vortec 7400 (454) that came in that suburban is one hell of an engine, there are also many things you can do to get more mileage and power out of it. Primary or Expansion Gauges And Upgrade Kits (52mm) For 2008+ OBDII CAN bus vehicles, Upgrading SIx-Gun, Economind, and SpeedBrake, or use with BBus Sensor Modules. Short tube headers won't do anything for you but long tube headers would he beneficial. The LS6 was discontinued after 1971 because of tighter emissions controls, and the LS5s power had dropped to about 245 horsepower by 1973 as a result of more stringent emission standards. Yes our tuning does work for trucks as well. The budget portion of the equation came from a 7.4L Gen VI big-block Chevy straight out of the local wrecking yard. Technical Specifications: No filter cleaning required for up to 100,000 miles. The General Motors 7400 is the name given to a 7.4-liter Vortec engine produced by GM from 1996 until 2001 as a truck engine. The Chevrolet 454s of the 1970s were the most powerful, with the LS5 producing approximately 360 horsepower and the LS6 generating around 450 horsepower. Safely gain up to +35 HP and up to +5 MPG in fuel mileage in your vehicle by safely optimizing your air/fuel ratio and timing curve for increased efficiency! Is the pcm that is used a 411? Apr 10, 2008 #5 M MyBoTy Veteran Member But like any stock engine, there was tons of power left to be squeezed out. So, what are the most common problems with the Chevy 454 Vortec? He could even be found working on tractors or hay bailers while on vacation at his uncles farm. Do you have identifying marks on the ECU? Always a big complaint with 454 TBI trucks. It was not a good moment to debut a big cubic-inch big block designed for performance vehicles, but the Chevy 7.4 made an impact nonetheless. Its amazing what some bolt-on parts can do! Purchase a Chevy 454 crate engine online from JEGS High Performance. This modification won't be cheap or easy to install, but will eventually pay for itself if you do a lot of towing or drive a lot of miles. Truth be told, Vortech offered a number of Maxflow Aftercooler systems but we selected an intercooler core we had on hand for testing. Step 2 Install a high flow air filter and cold air induction intake. Bosch p/n: 0280155884. Install a high flow air filter and cold air induction intake. When taken together, this fairly inexpensive approach can be good for noticeable gains in fuel economy. Mfg Performance Parts www.straubtechnologies.com www.distributorgears.com Weve seen a few 1996-1997 PCMs with this issue. FULL RESULTS-GEN 5 454 UPGRADE-STOCK PEANUT PORT HEADS. Also, is shipping included both ways? Vortech Superchargers Is it not the same motor from 96 to 2001. How to Make a Chevy 454 Vortec More Efficient | It Still Runs Installed E3 spark plugs which seemed to help. Install an aftermarket windage tray in your engine. Whats left, though, is a 454 cubic-inch big-block Chevy with huge potential. I recently ordered an ecm for a 7.4 vortec and was very impressed. We are running about 2-3 days on turnaround right now. "SE" Special Edition Tuning Kit For MerCruiser 454 & 502 Magnum MPI Engines.