GMC 7.4L/454 JET Performance Parts and Accessories I've made several performance upgrades myself, but are always looking for something better. Learn more. Topping the engine is a borrowed four-barrel Holley XP carburetor. However, Chevy still offers the 454 big block V8 as a crate engine. UltraPower 7.4L ECM Benefits: Gains of 40-45 HP and 45-50 lb-ft torque depending on existing upgrades Gains of 1/2 - 1 MPG Maintains speed and higher gears when climbing hills Is there a way you could tune that out completely or as much out as you possibly can? 454 L29 Vortec Engine Performance | Team Chevelle merci. 7.4 Vortec Vehicles Applications The Vortec 7400 had two variants, the L29 and L21, and they appeared in the following vehicles: I am of the same opinion that the UltraPower programming is going to be by far your best "bang for the buck". Pindar GM 7.4 Vortec Ultimate Engine Guide - Specs, Problems, Performance Yes we modify the shift patterns to hold the upper gears longer, your shift kit would not interfere or cause issues. Free shipping. PART NO. I've installed hypertech power programmer, lower thermostat, gale banks torque tube headers and full exhaust, with hi-flow catalytic converters, shift-kit for tranny and larger external cooler. Change to a synthetic oil that is light-weight. As long as the engine is well maintained, reliability is not affected. How To Add 70 Percent More Power to A Chevy 454 V-8. It is quite a noticeable difference! If you can supply me with your VIN and any part #'s that are on the ECM I can do some research. It was only designed for Chevrolets high-performance vehicles, such as the Chevelle and Corvette, and there were claims that engine horsepower output was actually underreported by Chevrolet during the muscle car wars. Surprisingly, the 454 laid down an impressive 330 horsepower and 475 pound-feet of torque. I have now disassembled the entire engine (except the crank and pistons) to check that everything looks good, remove all the dirt and grease and to prepare it for a rebuild. If they were cheap enough, sure. I was interested in your tune for this engine and was wondering what your best guess on the horse power / toque gains would be. This left us with Mark 4, Gen V and Gen VI big blocks to choose from, any of which would work for this project. I just purchased your UltraPower GM / Workhorse 1998-2000 7.4L Vortec (454) Custom Tuning. Is this doable? 2000 Chevy Truck 454 Specs | It Still Runs Temperature measurements taken before and after the carburetor revealed that the fuel cooling dropped the intake charge temperature from 235 degrees (before the carb) down to 120 degrees (after). You are using an out of date browser. as far as the cam, make sure that year didnt have the core support going down the center of the rad (pretty sure it didnt). I'm sure there are other differences that would need to be addressed but you should still be able to re-use the original key and ignition harness. It won't hurt anything to run like that. Any "recalibration" would require sending your ECM to us for programming changes. Can you reprogram and net me the same HP & TQ numbers as the L29? I am certain we can get more power and overall better drivability with our tuning versus your current setup. 7.4 and 8.1 vortec hp and tq ratings | Diesel Place What are your recommendations?? At this point the engine run well, with no code problems. 12568774 438 HP @5300 RPM 500 LB/FT @3500 RPM 1 2 Updated Design The 454 HO features an all-forged rotating assembly for great strength and durability. Explore Our Forums. Project Boneyard Boost was one of those rare occasions where we got to apply a massive infusion of power to a motor that cost next to nothing. Apr 14, 2016. Opinions On the 7.4 / 454 Suburbans and engine - Expedition Portal no. . 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. If powertrain performance projects and hardcore technical content are your interest, Power & Performance News is the publication designed for you. Engine Hotrodders' Lounge Body - Exterior Transmission - Rearend . This is a stock style setup, featuring a 4.000" stroke and bore sizes ranging from 4.250" (standard) to 4.375". I bought this truck brand new. JavaScript is disabled. We appreciate it but we only specialize in the big block engines. Steel Camshaft 4. The truck does not need to be emissions compliant. I have a 2000 7.4 engine transmission and full wire harness and ECM from one motorhome and want to put it in my 1995 motorhome. And what is the final cost of your ECM. We immediately checked the latest 8.1L off the list due to lack of availability and parts cross over. All rights reserved. Mark McNabb was a contributor at TopSpeed from 2013 to 2018. Vortech supplied a pulley combination that included an 80-tooth crank pulley and 32-tooth blower pulley which provided a drive ratio of 2.5:1. We don't however specialize in forced induction applications so we would not be able to help you with that. We can also adjust your speedometer to be correct. Sequential-Port Fuel Injection (454 only had 2 Throttle Body Injectors) 3. You can either pay $100 for the core and then be refunded when we receive back yours or you can send in your ECM for reprogram. The Vortec 7400 was based on Chevrolets 1995 7.4-liter 454-cubic inch V8 big block, which produced 230 horsepower. The L29 454 was originally rated at 290 hp and 440 lb-ft of torque thanks to a combination of fuel injection, large oval-port heads (to replace the peanut ports used in the previous Gen V motors) and a slightly higher static compression ratio. If I order a ecm reprogram will this fix my speedometer error too?? Its amazing what some bolt-on parts can do! Switched to Mass-Air Flow. The Vortec 454 was touted as having substantially more power. 3. Can I tune it myself later with my own tuner or is it still a black box like the oem? In addition to the powerful YSI supercharger, the kit included a cog-drive system to eliminate belt slippage under boost. Can you tune my new 2000 ECM and will it work without the original key and ignition harness. Jump to Latest Follow . The issue with your tachometer would only be fixed if there is an actual issue with your PCM. Roller Lifters 5. I am considering your tune for my motorhome. $360.56. I am considering some performance upgrades to my 2000 Winnebago Brave with the 7.4 liter engine. Buy your ELGIN Industries HL-7003S Hydraulic Roller Valve Lifters set at Amazon. Find many great new & used options and get the best deals for BBK Performance Parts 1710-XC GM VORTEC 305/350/454 80MM POWER PLUS THROTTLE BOD at the best online prices at eBay! Dont buy a camshaft because someone claims its fantastic; instead, purchase one because you know it will fit your vehicle and give you the performance look you desire. A cold air induction setup will feed the engine cooler and more oxygen-dense air. The Gray, the green with white strip and the black test grounded. Based on experience, we have had good results with Comp Cams 212/218 hydraulic roller camshaft. My question is you claim 40-55 hp gain on the 7.4l , and all the other tuners on the internet only claim 20-25hp gain, will I really see 40-55hp gain with stock engine, exhaust, and air filter? Build your own custom newsletter with the content you love from Street Muscle, directly to your inbox, absolutely FREE! Even stock we see impressive gains but even more so with the Banks PowerPack installed. See listing details. These fit: 1966-1998 Chevrolet & GMC 6.0L, 1970-2000 Chevrolet, GMC, Pontiac & Mercruiser Marine 7.4L 454, 2001-2009 Chevrolet & GMC 8.1L , Also fits Mercury Marine Big Block 7.4L, 8.1L & 8.2L Engines. I have a few questions so bear with me here. Best of all, this engine will make that power all day long without the threat of grenading under the stress of a turbo or supercharger. my ecm has to be replaced. 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. Thanks. $399.99. 1999 Crew cab dually, 454 vortec, AUTOMATIC. Subtract the standard .050-inch clearance, this leaves only enough room for a .420-inch lift cam. It was also noted to have more power for gasoline engines. Parts overview- James L29 Vortec 454 build Ep2 - YouTube My next upgrade is going to be exhaust. Do you offer anything for the 5.3? Chevrolet BB Gen 6 454-502, '96-'00 Camshafts - Competition Products I filled out a form and sent to COMP Cams to see what they recommend and sent an e-mail to Blackbear to see what cams they had experience with since I will need to PCM tune redone. Both Vortec 7400 heads (the '98-'01 12560241 and the '96-'01 10141279) have about 100cc chambers. Also how much benefit do you think I would gain by going aftermarket catback exhaust. BBK 1710 80mm Throttle Body - High Flow Power Plus Series GM Vortec 305 It would be a good idea to re-tune for the Banks and injection systems. Free shipping. Even so, this engine was built primarily to provide huge towing power for CAFE-standard exempt vehicles, so there remains some room for improvement. Prices increase after 2/28. It was utilized in the Chevrolet Silverado, GMC Sierra, Chevrolet Suburban, and Chevrolet Express. Is it worth tuning a black box or worth changing to 411, I have headers ,cat delete, 19.5 five 0 injectors, and Pulling cam swap. You claim 40-55hp gains is that something that I will notice drastically or is it more of a subtle power increase? Right now I have a CAI, 2" full length headers, 3" dual exhaust and EGR delete. Interested, but don't want to buy one to find out i've already got it :D (my unit has 2 previous owners i think). It is bone stock except for tow mirrors and Kodiak door handles on all 4. Chevy 8.1 Vortec Ultimate Engine Guide - Specs, Performance, Problems I have a 1998 Winnebago Brave on a p30 chassis with the 7.4 with a Banks Power Pack. Gains will be on par with what we achieve with the RV's so it will very well suited for towing. 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 installed a K&N replacement are filter in the stock air box. The valve train is OHV with two valves per cylinder and multi-port fuel injection for fuel induction. Distributors cap and rotor kit features brass inserts and stainless steel rotor springs,designed to provide the best possible fit to ensure maximum conductivity between the distributor towers and spark plug wires,prevents arc through and crossfire. Boneyard Boost: Vortech 454 - Street Muscle I read in earlier questions asked that you had stopped doing the earlier ones. Apr 9, 2008 #4 7 70SSman Veteran Member Aug 11, 2005 134 Amston, CT, USA 100$ with low miles. I have a 2000 OBS Chevy quad cab with a 454 Vortec. 496 cubic inches. The great thing about using a blow-though carburetor combination is the intercooling effect you get from the introduction of fuel. Make use of long-tube headers (exhaust manifolds) and an aftermarket exhaust system. L29 454 Vortec | Team Chevelle It was the same size as the outgoing 7.4 L V8, but got a boost in power and more towing capacity. I have a 2000 GMC school bus with the L21 7400 motor.
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