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Do you have identifying marks on the ECU? 454 Project Tow Beast - TBICHIPS | TBI To further improve power, we also upgraded the stock hydraulic roller camshaft with an XM284HR from COMP Cams that offered .547 lift, a 230/236-degree duration split and 112-degree lsa. In search of power, GM reverted to the big-block engine design, with a 454-cubic inch displacement. After installed Ultrapower GM/ Workhorse 1998 7.4l Vortec 454c. Though larger than the previous 7.4L models, the unique 8.1L could not utilize the amazing array of performance parts available for the previous three conventional big-block models. I just purchased your UltraPower GM / Workhorse 1998-2000 7.4L Vortec (454) Custom Tuning. 800-417-4559 Jay, https://www.ultrarvproducts.com/UltraPower-GM-Workhorse-7.4L-(454)-Custom-Tuning. The most important changes that are made have to do with spark advance, fueling, transmission shifting and torque management settings. During its five years on the market, the 7400 was employed in 26-foot U-Haul trucks for commercial purposes. This is a crew cab, 8 foot bed. I am doing a full engine swap from a damaged motorhome to my older motorhome. Even so, this engine was built primarily to provide huge towing power for CAFE-standard exempt vehicles, so there remains some room for improvement. 1998 k 3500 454 auto 4:10 Dually..What on earth can I do to get more out of my truck..without mortgaging the house. The Official Vortec 454 Info thread - GMT400 Yes, we can tune your ECM. We have no issues with tuning a higher mileage engine as long as it is in good running condition. Typical gains are 40-45 horsepower and 45-50 lb-ft torque, 4. Can i tell if my RV has this already? youll have to stick to a torque cam because of the computor needs vacuum (speed density) headers will help greatly. 1999 vortec 454 7.4 - HPTuners I called Banks Power last week to try and find out what they recommend. I have had a hard time finding much of anything for these engines. Engine is in stock configuration with no upgrades. 2. With our tuning, peak horsepower is at about 3500 RPM and peak torque is about 2500 RPM. The terms ECM, PCM, and VCM are all used to describe the engine computer by various manufacturers, yours is located above the radiator . How To Add 70 Percent More Power to A Chevy 454 V-8 - Top Speed Your vehicle is not compatible. The issue with your tachometer would only be fixed if there is an actual issue with your PCM. 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. I have a 1996 C3500 crew cab dually with a 7.4. The Vortec enhancements simply allowed GM to pass smog at a higher RPM. Hello I have 2000 GMC k3500 Truck. Is the pcm that is used a 411? How to Make a Chevy 454 Vortec More Efficient | It Still Runs Free shipping. We also took the liberty of installing a Race-Port blow-off valve from Turbo Smart. I just put the k&N system on my truck made a huge difference in sound and performance I would deffanitly recomend spending the $250. The batteries are fully charged and there is 12 volts to the distributor. BBK 1710 80mm Throttle Body - High Flow Power Plus Series GM Vortec 305