What are your recommendations?? Only a set of dyno headers and an electric water pump were different. youll have to stick to a torque cam because of the computor needs vacuum (speed density) headers will help greatly. The UltraPower ECM performs very well on both stock engines and ones that have been upgraded with other modifications. 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 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. The valve train is OHV with two valves per cylinder and multi-port fuel injection for fuel induction. Cost would be $495. The Vortec 7400 as you know lays down 290 HP and 410 LbFt of Torque. If you send it to us you avoid paying the core charge. Is the pcm that is used a 411? Free shipping for many products! Stronger shift points for towing and power. Full Forum Listing. If i buy a tune do i need to send my ECU 1st or can you send me one then when i get the ECU from you send mine back to get my 100 back? How to Get More Horsepower From a 360 dragster engine image by Robert Young from, Copyright 2023 Leaf Group Ltd. / Leaf Group Media. I do some pulling but mainly driving with this truck I have a factory y pipe with no cats and dual 3 inch flowmaster mufflers. 90 and older is particularly bad and that is largely due to NO OVERDRIVE. The Vortec enhancements simply allowed GM to pass smog at a higher RPM. If you choose the core option we will program an ECM here and ship to you. If I send in a functional pcm for my Suburban mentioned in last question whats the average turn around for it? Even better than the big peak gains was the fact that the cam swap . However, this engine was developed mostly for large towing ability for CAFE-exempt passenger cars, so there is still room for improvement. Hi Warren, that is definitely something we can tune for. Whats the stock numbers on a Vortec 454? There was plenty of power left in the YSI, but at 847 hp we couldnt help but be amazed at the extra strength GM put into the design of their 290-hp big block. 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 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. We use the original black box PCM's. It went through different upgrades over the years finally ending with the 454 Vortek which stopped production in 2001. That extra air going into your engine needs to get out somehow; installing a full aftermarket exhaust system like this is always good for more fuel economy, especially when combined with a freer-flowing intake. UltraPower GM / Workhorse 7.4L (454) Custom Tuning - Ultra RV Products For more information, visit www.P65Warnings.ca.gov, NOTICE: Fororders outside of United States. Not sure if you have any other issues causing low power though because it should outperform the 5.7L, especially towing. Return shipping is included , you are responsible for shipping to us , however if you choose the "core charge" and order the ECM , we can provide a return shipping label for your core and deduct from the core refund. 1 cat is gone already and the other is gutted i am taking it off next week when i get a chance. The 7400 was essentially the same big block 454 that powered Chevy through the muscle car years, but with improved cylinder heads and a hydraulic roller camshaft, it was far more efficient than the old LS6 could ever hope to be. These modifications will improve net mileage without sacrificing power, resulting in better overall mpg. Feel free to call me with your vin # handy if you would like to get your order in. Thinner oils allow the internal engine components to spin more freely and effectively, which improves their function. This is perfect for an otherwise stock engine as the gains are the best bang for the buck by far. I THINK I want a diesel until I look at the prices. We are currently out of clean/painted cases for the PCM's. Our acclaimed editorial staff covers all aspects of engine and driveline upgrades with a mission of presenting information that is both interesting and achievable for the average car guy. I've always heard that they were a good upgrade to the TBI 454 and earlier 454 heads. TQ with those modifications done. This mod will not be inexpensive or simple to execute, but it will pay for itself if you do a lot of towing or drive a lot of miles. Yes you are correct that there is torque management which "pulls" back power when taking off from a stop. Vortec Big block performance upgrades. - GMT400 I have a 1998 Winnebago Brave on a p30 chassis with the 7.4 with a Banks Power Pack. http://www.cumminsdieselspecs.com/cummins_timeline.html, http://www.internationalpowerstroke.com/timeline.html, http://www.duramaxdieselspecs.com/compare_duramax.html, Tow rig Suspension and Axle upgrades questions (4th Gen Dodge). Et si je devrai faire recalibrer mon ecm? Unfortunately this is not something that we offer. Or if I pay to send in, is the return shipping included in the $495? The old camshaft came out, too, with a meatier hydraulic bump stick with 0.600 inches of lift taking its place. The guys over at Hot Rod magazine wanted to prove its possible to make big horsepower from a Chevrolet big-block V-8 lifted from a junk1986 motorhome. Also I have Thorley tri Y hearers on mine will that effect the tune? Oxygen sensor modifications can be done. Some parts are not legal for use in California or other . I will be sending you my ECU. We can easily do this with the specs you provide. Orders placed on the weekend or after cutoff on Friday, and orders placed on select holidaysareprocessed on thenext business day. If you want to send your PCM in that you know is functional, that is the best way to do it. cam with matching torque converter and headers would be easy. The upgraded Vortec 7400 is a 7.4L V8 OHV 16V-volt FI engine. My tech who does the programming is out of town this week so it would get done first thing next week if you wanted to go ahead with it. We can also adjust your speedometer to be correct. 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. Only a set of dyno headers and an electric water pump were different. Or is it what get is all you get? Yes, we can do that. It has an ohv configuration with two valves per cylinder and a bore and stroke of 4.24 inches x 3 on the intake side. Reference core exchange, what is the time limit for you to receive the exchange? Thanks. That being said, the threads on the net are pretty old. Other #s not sure what they are if theyre useful, 86DAFMM0017433PS, HDW # 16239740. I have a 2000 3500 454. Would the retuned ECM provide any performance gains above what are present now? 4 Bolt Main GM Factory Vortec, Edelbrock's Performer Multi-Point EFI. Are the tunes generic or do you change different things for different people? Anything that will help the performance. A few weeks ago I bought a very low milage 454 Gen. VI L29 Vortec engine with hydraulic roller. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. This thing is weak as water. Apr 10, 2008 #5 M MyBoTy Veteran Member Yes we modify the shift patterns to hold the upper gears longer, your shift kit would not interfere or cause issues. 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? The terms ECM, PCM, and VCM are all used to describe the engine computer by various manufacturers, yours is located above the radiator . In 1996, when all of GMs models received excellent reviews due to a new range of engines that added power, every one of its vehicles were praised by clients. To others, the 7.4 Vortec 454 big-block was the perfect engine at the wrong time. Edlebrok performance heads with factory Combustion chamber size 100-110cc, valves set for .700 lift, I-2.190 E-1.880, 3/8" guideplates : http://www.summitracing.com/parts/EDL-60499/ GM Vortec EGR blockoff plate p/n is 12554606. Some differences are: 1. Solenoid resistance: 12.5 Ohms. "SE" Special Edition Tuning Kit For MerCruiser 454 & 502 Magnum MPI Engines. 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. Check if this part fits . The tuning alone will be the single biggest change you can make to improve power and throttle response. We do not, however, have core PCM's for this engine so you would have to send your PCM in for the flash. It is an all-iron engine (block and heads . I know that my question is very reduntant but I need to ask it .I pull a trailer and want a little more tow po1wer. You might also want to consider a high voltage coil, high performance 8 mm spark plug wires and a set of quality aftermarket spark plugs to help your engine ignite more of the fuel that goes through it. Always a big complaint with 454 TBI trucks. Installed E3 spark plugs which seemed to help. The C/K 3500's standard engine is a 5.7-liter V8 OHV 16-volt FI engine, and the 454 engine comes as an optional upgrade. What sets us apart from the others? I replaced the relay to no avail. When you buy a single component or a complete kit, like a camshaft, you must ensure that it is suitable for your car. Is it actually running at that RPM or just showing that? Wiring is the same. We modify this so that it is still "safe" but definitely wakes the truck up. First off, I snagged a used 454 throttle body off ebay and sent it out to www.rvmorsemachine.com to get bored to 54mm for some decent air flow for this big block project. We would recommend speaking directly with a camshaft manufacturer to determine the best for your particular engine. Aftermarket hood are hit and miss, we did find that the integrated airbox arrangement of the Suncoast hood played havoc with clearances that were confirmed to fit within the factory underhood bracing. The 1993-or-so design FEAD has been shown the clear the factory hood. Any thoughts from you technical guys? Cats have been removed as well as smog pump. 7.4 and 8.1 vortec hp and tq ratings | Diesel Place But don't despair. I list that this RV was originally equipped with a 4.63 rear gear ratio and a tire size of 225/70R19.5. 454 VORTEC UPGRADES | HardlineCrawlers I think I am going to swap on a good set of aftermarket heads and change out to an Edelbrock Pro Flo EFI. We have no issues with tuning a higher mileage engine as long as it is in good running condition. We don't however specialize in forced induction applications so we would not be able to help you with that. In the end, we selected a 1999 Gen VI 454 and pulled it from its home in the engine bay of a 1-ton work truck. 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). Chevrolet 7.4 Vortec was a modern-day improvement of the firms most legendary big block. Based on experience, we have had good results with Comp Cams 212/218 hydraulic roller camshaft. JavaScript is disabled. If I order a ecm reprogram will this fix my speedometer error too?? 2019 Rodney W. Brazel Inc. - Ultra RV Products is a Division of Brazel's RV Performance, UltraPower GM / Workhorse 1998-2000 7.4L Vortec (454) Custom Tuning, within 24 hours from the order date. If you want to take full advantage of the cam swap then a custom tune will be needed to address that. You might be able to run an L29 cam, but you will need to consult an engine builder. It will be plug and play. If you send us your PCM, our turn around is usually 1-2 days. For this test, the motor was configured with an Edelbrock RPM Air Gap intake and Holley 750 carburetor. So, what are the most common problems with the Chevy 454 Vortec? I read in earlier questions asked that you had stopped doing the earlier ones. Will this correct my RPM gauge issue? These modifications will help to generate more horsepower without adversely affecting fuel efficiency, which will ultimately increase net mileage. Chevrolets Vortec 454 was a modern-day evolution of the firms most famous big block. The 7.4L was originally offered in three versions: the LS5, LS6, and LS7 (which was never offered as a factory option to the general public). I called Banks Power last week to try and find out what they recommend. I'm interested in the available upgrades for the vortec 454. He could even be found working on tractors or hay bailers while on vacation at his uncles farm. Maybe I need to go by the dealer and test drive a diesel or another gasser so I have a comparison. . The stock Vortec iron head will not tolerate more than .440-inch lift. will i notice anything? Most ordersare shippedwithin 24 hours from the order date. 7.4 Vortec Performance Upgrades - BOOST YOUR ENGINE In addition to the powerful YSI supercharger, the kit included a cog-drive system to eliminate belt slippage under boost. The cooler charge air (plus tubing length and bends) dropped the peak boost pressure from 19.1 psi down to 17.7 psi. A restrictive or clogged air filter makes the engine work harder to breathe, which reduces efficiency. How To Add 70 Percent More Power to A Chevy 454 V-8. Thank you for any information you could give me. This project will also let customers know if spendintg approx $2300 on all these upgrades is going to give them the results they need from their big block engines. Thank you. 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. Really? I have a GMC PCM service # 16238212 for a 99 Topkick w/7.4L 454 gas engine; and was wondering if you are able to repair these PCMs/ECMs or have an equivalent I can replace it with? And performance tune? WARNING: Products may contain one or more chemicals known in the State of California to cause cancer and/or birth defects or other reproductive harm. Technical Specifications: No filter cleaning required for up to 100,000 miles. It is a redesigned Chevrolet Big-Block engine and was introduced with the 2001 full-size pickup trucks. Alright Jay! Their high performance cellulose glass media traps contaminants such as rust, dirt, scale and other foreign materials. Thinner oil drags less on internal engine parts, helping the engine to spin more freely and run more efficiently. We set all the parameters in the PCM, so you will not have a way to make adjustments on your end. This is only 1 of the many changes that we make with our programming to achieve great power gains. Truth be told, Vortech offered a number of Maxflow Aftercooler systems but we selected an intercooler core we had on hand for testing. In 2001, production of the 7400 line was discontinued. I have been watching lots of posts and things get carried away very quickly about getting big big hp. Then, in 2001, GM dropped the 7400 and 454 combination in favor of the final powerful big block, the 8100 496-cubic inch engine with 340 horsepower at 4,200 rpm and 455 foot-pounds of torque at 3,200 rpm. They said they no longer support my RV and had no parts available. The most important changes that are made have to do with spark advance, fueling, transmission shifting and torque management settings. 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. It specs out at 265 HP@4500 RPM and 340 ft/lbs of torque@3500 RPM. I have a 1996 Suburban K2500 with the L29 engine and 4l80 trans. UltraPower GM / Workhorse 7.4L (454) Custom Tuning - Brazel's RV Raylar performance packages allow your 496 to produce massive amounts of power without sacrificing reliability. Our tuning is based off of extensive dyno testing of RV's, and while results may vary, our gains are generally higher than others due to our expertise in the tuning of the L29 7.4L. It is located on top of the radiator support and has 4 connectors going into the back of it. The 1970 Chevrolet 454 was the most powerful with outputs of 360 and 450 horsepower from the LS5 and LS6, respectively. 16238212. Thanks to a maximum impeller speed of 65,000 rpm (racers go even higher) and a peak efficiency rating of 78%, the Vortech YSI was capable of supporting over 1,200 hp at 30 psi. I am of the same opinion that the UltraPower programming is going to be by far your best "bang for the buck". It was utilized in both performance automobiles and trucks, as well as maritime and industrial applications in various combinations. Headers exhaust. Our typical turn around time is 2-3 business days. GMC 7.4L/454 JET Performance Parts and Accessories Brand: JET Performance Make: GMC Engine Size: 7.4L/454 Individual Parts Part Groups In-Store Pickup Results 1 - 25 of 117 25 Records Per Page Default Sort JET Performance Programmers 15024 Computer Programmer, Chevy, GMC/Cadillac, Fullsize Pickup/SUV, 4.3L/5.0L/5.7L/7.4L, V6/V8, Each The Vortec 7400 was based on Chevrolets 1995 7.4-liter 454-cubic inch V8 big block, which produced 230 horsepower. Yes, as long as it is a "J" (8th digit of the VIN) Vortec 7.4L, we can tune it. It was bone stock 2x4 extended cab dually. Naturally, the truck-based 454s were tuned for torque, so having nearly 500 pound-feet wasnt a big surprise. I would think that u-haul did not use their own ECM. Eric, we can program for EGR delete, cost would be $ 495.00 and would also include the performance tune . Free Shipping over $199* Same Day Shipping before 7pm* Price Match Guarantee Free Shipping over $199* Same Day Shipping before 7pm* I'm is Arizona and I'm planning a trip this month after Bonneville, to Aberdeen, home town, and Centralia, still have relatives there. I wouldn't mind an EGR delete for the part throttle improvement and a cleaner intake, but mostly I would like to keep everything else functioning, I am looking for more torque below 3,000 rpms, ideally in the 1500-2500 range, because almost all of my driving is in that range. The exhaust does not have CATS with dual to the muffler and single exit tailpipe. Headers suggested. We gain on average 45-50 horsepower and 50 ft. lb. Gains will be on par with what we achieve with the RV's so it will very well suited for towing. For this one, I would want you to send your PCM into us to be done. We are not able to assist in providing this PCM. Thanks for any help. This cam is designed specifically for the TBI 350 small-block and specs at 194/214 degrees of duration at .050-inch tappet lift with .398/.442-inch lift. We will set the tune up based on your modifications and requests. Have you plugged an OBD2 reader into the truck to see what it is displaying for RPM? and will it improve my over all power? Also I dont have either downstream 02 sensors. Can I tune it myself later with my own tuner or is it still a black box like the oem? From my experience, the HyperTech programmer for those engines is pretty generic and does not make very many changes in the programming. The 454 HO crate engine boasts 438 HP and 500 lb-ft of torque. If you would like to place your order feel free to give me a call at 800-417-4559. I dont have the 2000 VIN only the VIN from my 1995. No where near diesel power my ass. way stronger than a stock 12v, 6.5, & 7.3 powerstroke by far!!!! Yes, all gains listed are with 87 octane gas. A cold air induction setup will feed the engine cooler and more oxygen-dense air. Performance computer re-calibration and a Custom High flow Billet Flame Arrestor that increases the maximum power by more than 25 HP* and 30 pounds of torque*. Injector type: US-CAR, saturated. Do you offer anything for the 5.3? 98 Single Rear Wheel 3500 7.4 Vortec. no. A restrictive or clogged air filter will force the engine to work harder to breathe, which makes it less efficient. will your new part ecm work on this motorhome. It is a re-programmed ECM, either you send yours in or we send you one on a core exchange. The old cast-iron cylinder heads and low-rise intake manifold were dumped in favor of some aluminum PowerOval 280 heads from Trick-Flow with upgraded valvetrain and a Summit single-plane intake manifold. Our kits include camshaft, lifters, piston rings, pistons, both rod and main bearings, cam bearings, timing components, oil pump, frost plugs and gasket set, with an option to purchase a crankshaft as well. That said, the main internal differences between the L29 and L21 is that the L21 has forged pistons and crankshaft. Does this upgrade have a negative or positive impact on engine life? Chevrolet Performance's 454 HO crate engine is a Big-Block bargain - an affordable engine with performance specs that will make you think it's 1970 all over again. Obviously different, but I still think the 454 has more to offer. Truck runs great doesnt miss or anything just seems to not really have any power at all in 1st gear and alittle more in second gear. Install a high-flow air filter and a cold air intake. 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. Would we still get the good price when you get more control modules in stock? 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. Yes, we can resolve your issues. The GM 7.4L UltraPower ECM has long been the ultimate performance modification you can make to your GM 7.4L powered RV or truck with the highest power gains on the market! Prices increase after 2/28. Is this enough information to create a tune or will you need more information? I just bought this 97 suburban 4wd with the bbc. Are there any gains to be had by programing and adding headers to my truck? Also, is shipping included both ways? Chevrolet BB Gen 6 454-502, '96-'00 Camshafts - Competition Products Steel Camshaft 4. After selecting a motor, we set about making the necessary changes for our test. It was utilized in the Chevrolet Silverado, GMC Sierra, Chevrolet Suburban, and Chevrolet Express. To allow the motor to rev cleanly to 6,000 rpm under boost, the cam upgrade was teamed with a new set of beehive valve springs. Mfg Performance Parts www.straubtechnologies.com www.distributorgears.com At this point the engine run well, with no code problems. Hot Rod And remember, thats all without touching the bottom end. You can expect about 40-45 horsepower and 45-50 lb-ft torque increase with much better throttle response, crisp shifts and there is a reduction in the "TQ Management". I think they were made before Chevy started using real tornados. In our quest to locate a suitable 454, a typical rip to the wrecking yard revealed at least three of the four available big-block combinations. merci. Hello! Need advice: 454 VI L29 Build | Hot Rod Forum Precision Auto Injectors Set of 8 Genuine OEM 1996-2000 GMC Chevy 7.4L 454CID Vortec Rochester Fuel Injectors. Truck has k&n air filter, 2.5 inch exhaust (no cats), e3 spark plugs and 8.5mm plug wires. I straight wired it to test it and it will run. Dollar for Dollar, it is highly unlikely that the $2400 for a full blown Banks Power Package would yield the same cost/benefit as say the addition of the UltraPower GM / Workhorse 7.4L (454) Custom Tuning module. How to Pick Up Big Power On a Junkyard 454 With a Simple - MotorTrend