All above engines equipped wit Hydraulic Roller Lifters. Do you folks know of cam upgrades along with tuning that would give power upgrades on a l21 with a manual transmission ? However, this engine was intended to provide significant towing power for CAFE-exempt vehicles, so there is still room for improvement. The state of California requires that this warning be posted for people purchasing products that reside in California. Check if this part fits . A restrictive or clogged air filter will force the engine to work harder to breathe, which makes it less efficient. The 1993-or-so design FEAD has been shown the clear the factory hood. CHEVROLET 7.4L/454 - Free Shipping on Orders Over $99 at Summit Racing Departments Restoration Stock Replacement Street Rod Shop Departments Air & Fuel Delivery Books/Videos/Software Brake Systems Chassis & Suspension Cooling & Heating Engines & Components Exhaust Exterior & Accessories Fasteners & Hardware Fittings & Hoses Gaskets & Seals 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. Howards, Hydraulic Roller Camshaft, Chev BB Gen 6 454-502, GM, Chev BB Billet Steel Hyd. It is $495 if your sending your core/pcm in first. If they were cheap enough, sure. Thanks. Cats have been removed as well as smog pump. Best, least expensive way to get more power out of this engine is with our custom tune. 90 and older is particularly bad and that is largely due to NO OVERDRIVE. Chevrolet 7.4 Vortec was a modern-day improvement of the firms most legendary big block. It was utilized in the Chevrolet Silverado, GMC Sierra, Chevrolet Suburban, and Chevrolet Express. Most generic tuners only change very basic parameters within the computer, whereas UltraPower Tuning changes approximately 400 parameters including both engine AND transmission settings. We can tune stock or modified, not a problem. Yes, it definitely will. I am considering your tune for my motorhome. The tuning alone will be the single biggest change you can make to improve power and throttle response. Nothing I was finding really listed ACTUAL upgrades. During its five years on the market, the 7400 was employed in 26-foot U-Haul trucks for commercial purposes. No where near diesel power my ass. way stronger than a stock 12v, 6.5, & 7.3 powerstroke by far!!!! Install a high flow air filter and cold air induction intake. Yes, you can pay the $100 up front core charge and be refunded when you send your original back to us. 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 If you don't mind a "dirty" PCM case then we can take care of an order for you. Always a big complaint with 454 TBI trucks. We CAN tune the engine computer with our UltraPower tuning to get more performance but we MUST have you send your PCM in to us for programming as it has a unique PCM that we don't have cores for. Yes, this would be the compatible ECM with your VIN and part #. But like any stock engine, there was tons of power left to be squeezed out. Originally Posted by PonyKiller87 Ok, sounds just like swapping over the 96-00 vortec 350 to the 0411 as far as the wiring goes. I am of the same opinion that the UltraPower programming is going to be by far your best "bang for the buck". The Vortec 8100 (RPO L18) is a V8 truck engine. 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. Some of which are going with an upgraded ignition, headers, removing the cats and having the computer flashed to shut down the secondary O2 sensors. The 8th digit of your VIN is the letter "D" which designates your engine as a 7.4L LP4 which is different from a normal L29 7.4L. 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. Precision Auto Injectors Set of 8 Genuine OEM 1996-2000 GMC Chevy 7.4L 454CID Vortec Rochester Fuel Injectors. I just purchased your UltraPower GM / Workhorse 1998-2000 7.4L Vortec (454) Custom Tuning. We appreciate it but we only specialize in the big block engines. Would you be able to tune this on a new computer so I can keep the original? Do you have any videos of how to locate and remove my ECM? TQ with those modifications done. What is the difference between a Duramax 6.6-liter and a Chevrolet 7.4-liter engine? Dyno-tested with up to 50% more airflow than restrictive factory box air filter and intake tube. Every horsepower subtracted as a result of parasitic drag is one less horsepower that wont help your truck travel down the road. That extra air entering your engine must go somewhere; a full aftermarket exhaust system like this is always beneficial to fuel efficiency, especially when combined with a freer-flowing intake. So, I am contemplating upgrading this thing for more power, or selling and buying a Dmax. With the 454, putting in Vortec 350 code and chaning the displacement and enter in the tables/constants/switches appropriate to the 454 is all that is needed. A/T Flywheel, Hedman TEMS headers, and all the other good stuff that goes with a long block. 7.3 is 250-275/505-525 stock. If I order a ecm reprogram will this fix my speedometer error too?? and will it improve my over all power? What type of gains could I expect with a tune for this? Vehicle Monitoring and data-logging like no other! Don't worry about what a camshaft may produce at 4000-5000 rpms in truck engines like this - YOU DON"T DRIVE THERE! Programmers. 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. The performance chip is fully compatible with your Chevrolet Silverado 1500 in all trims, including the 2.7L, 3.0L, 4.3L, 4.8L, 5.0L, 5.3L, 5.7L, 6.0L, 6.2L and 7.4L engines. Can I reprogram on the fly as conditions change and performance needs warrant a change?? Rowe studied engineering, philosophy and American literature at Central Florida Community College. A few weeks ago I bought a very low milage 454 Gen. VI L29 Vortec engine with hydraulic roller. The ignition timing was dropped to 21 degrees and after adding a few jets to the carburetor, we were rewarded with some serious power. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. Buy your Big Autoparts Ignition Distributor Set DR474 DR331 at Amazon! For GM vehicles, the Vortec variant increased power by 60 horses. It is bone stock except for tow mirrors and Kodiak door handles on all 4. If you send us your PCM, our turn around is usually 1-2 days. 454 Vortec Reliability and Ownership Guide, Pre-Purchase Inspection: What to look out for, crate version of the 454 big block from Chevy, 1996-2000 Chevrolet/GMC C/K GMT-400 platform trucks 2500/3500, 1996-1999 Chevrolet Suburban 2500/GMC Suburban 2500, 1996-2000 Chevrolet Express ( & 1 ton versions), 19982001 Chevrolet Kodiak/GMC TopKick/Isuzu H-Series 4500 5500, Larger Fuel Injectors and Fuel Pump Regulator. PART NO. 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. performance, modifications, classifieds, troubleshooting, maintenance, and more! All other modifications are going to be expensive, labor intensive and still not necessarily yield the same results. I heard these trucks have a torque management system does this computer give my truck back all its power? Typical turn around is 3-4 days, sometimes quicker. I wish we could say for sure that you will be able to see a nice gain but we try not to over-promise on that. merci. I have a 1998 Winnebago Brave on a p30 chassis with the 7.4 with a Banks Power Pack. A restrictive or clogged air filter will force the engine to work harder to breathe, which makes it less efficient. So, what are the most common problems with the Chevy 454 Vortec? The Chevrolet 454 was phased out in most passenger vehicles by 1975, but it remained a viable power plant in heavy-duty Chevrolets until 1996. This is only 1 of the many changes that we make with our programming to achieve great power gains. 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. Is it possible to get the newer 0411 with your tune for my truck. $199.95. Growing up, Mark always had a mind for tinkering on random items throughout his home and dads garage, including a 1953 Ford Mainline and 1971 Corvette Stingray. 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". It was the same size as the outgoing 7.4 L V8, but got a boost in power and more towing capacity. My next upgrade is going to be exhaust. You may also like. 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. These 454 7.4L engines tend to respond pretty well to camshaft changes with good grinds that are designed to produce low and mid-range rpm torque increases. That is the difference between cookie-cutter and custom! Thinner oil drags less on internal engine parts, helping the engine to spin more freely and run more efficiently. Probably cause no cats. I've noticed a significant performance uptick, but it seems to fall flat in the upper mid-range, almost seems like it could use a MSD multi spark discharge, I don't know, but I'm considering having a dyno test to see what is happening. Switch to a lightweight synthetic oil. Thank you. Oct 25, 2004 Do you guys know anything about the L29 Vortec motor. Choose FORTEC 4x4 for Jeep Wrangler JL and Jeep Gladiator JT Customizing - Highly trained Specialists Since 1991 Each Jeep we touch brings you the greatest quality, functionality and performance We offer Jeep Turn Key Solutions, Jeep Parts and Jeep Accessories in Partnership with Jeep Dealerships in Atlanta and Florida After selecting a motor, we set about making the necessary changes for our test. Check for Availability: $349.95. I replaced the relay to no avail. 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. from your CUSTOM TUNING,ECM, J'ai l'intention d'amliorer l'ordinateur de mon VR, par un model ULTRAPOWER mais avant d'acheter, j'ai besoin de savoir quels fuel injecteurs seront le mieux adapts ( conomie et rendement ) avec le nouveau module? as much as possible im going to do a cam exhaust and injectors and intake so my questions are what do you think my gain would be with your pcm and can it be piggy backed with a plug in tuner thanks matt, would i be able to get a retune if i add a cam after, and what is the turn around time, thanks. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. 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. Hi Warren, that is definitely something we can tune for. 496 MAG Performance Parts Performance Applications Chevy / GM Trucks Banks iDash: SuperGauge & DataMonster. The UltraPower ECM performs very well on both stock engines and ones that have been upgraded with other modifications. Another popular upgrade is changing to Bosch 4 hole injectors. Performance Street, great low to mid-range. In an effort to further drop the inlet air temps, we installed a makeshift air-to-water intercooler. Install an aftermarket windage tray in your engine. Would the retuned ECM provide any performance gains above what are present now? The greater the power gains, the bigger the budget. . 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. You claim 40-55hp gains is that something that I will notice drastically or is it more of a subtle power increase? I'm interested in the available upgrades for the vortec 454. We will set the tune up based on your modifications and requests. I have a few questions so bear with me here. My goal is to improve torque and trans efficiency then MPG. Although Chevrolet does not explicitly recommend it, because a full synthetic is so slippery, you can use a lighter weight oil without risk of excessive engine wear. The 7400 was essentially the same big block 454 that carried Chevy through the muscle car years, but a hydraulic roller camshaft and revised cylinder heads helped to make it far more efficient than the old LS6 could ever dream of being. My question is what cam you would recommend for towing? Forget the typical race-motor build up, Boneyard Boost was all about force feeding some tired, high-mileage workhorse we purchased for the paltry sum of $500 ($250 on half price sale weekend!). 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). HotCars covers all things automotive: the latest auto news and informative reviews on the car, pickup truck and motorcycle industries. Not sure if you have any other issues causing low power though because it should outperform the 5.7L, especially towing. He eventually figured it out. 16238212. 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). Apr 10, 2008 #5 M MyBoTy Veteran Member We have no issues with tuning a higher mileage engine as long as it is in good running condition. I was interested in your tune for this engine and was wondering what your best guess on the horse power / toque gains would be. Fuel pump doesn't run. So if I have your tune done what is the turn around time sending my PCM to you? 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. It specs out at 265 HP@4500 RPM and 340 ft/lbs of torque@3500 RPM. We set it for the best performance in all conditions, it is not user adjustable. See listing details. Following up from previous question, here is the VIN 1GDG6H1BXYJ907917 and #s off the ECM, 09384681, sev. The Muscle Automobile Period had come and gone before the 7400 series debuted. I would think that u-haul did not use their own ECM. Your email address will not be published. Is the pcm that is used a 411? We gain on average 45-50 horsepower and 50 ft. lb. Full Forum Listing. 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. The great thing about using a blow-though carburetor combination is the intercooling effect you get from the introduction of fuel. Their high performance cellulose glass media traps contaminants such as rust, dirt, scale and other foreign materials. 4 Bolt Main GM Factory Vortec, Edelbrock's Performer Multi-Point EFI. It may not display this or other websites correctly. There are a lot of variables that play into the exact gains we can achieve but I would say somewhere around 45-50 HP and 60 Ft Lb. Thinner oils allow the internal engine components to spin more freely and effectively, which improves their function. what does this do at emission inspections?? The previous owner had the engine rebuilt in 2012 and tells me they installed an RV cam but I am not sure which one. Yes, we can tune your engine for more power, doesn't matter what type of transmission. The air filter is easily removed, cleaned, and reused. will your new part ecm work on this motorhome. The results: 567 horsepower and 537 pound-feet of torque on 89-octane pump gas! 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? We can send a pre-programmed ECU on core exchange. I use the truck for towing and it is quite weak, If this ecm has to be reprogrammed in the future do I go to GM Dealer or have to send back to you?? It is an all-iron engine (block and heads . It can be done fairly cheap , power for days and 15-20mpg, I repeat. Maybe I need to go by the dealer and test drive a diesel or another gasser so I have a comparison. Whether your power boat is running boost or naturally aspirated, we have the correct performance parts for your application. I have a 2000 gmc k2500 with the l29 454. Don't know how tuning would work. The compression was plenty low for use with the blower, but the extra power it provided would eventually be multiplied by the boost. From my experience, the HyperTech programmer for those engines is pretty generic and does not make very many changes in the programming. 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. Install a high-flow air filter and a cold air intake. Makes NO permanent changes to your vehicle's computer! When reliability and performance can't be compromised, you want TXL Wire - not the inexpensive primary wire you find in other harnesses; High strand count copper and high-quality insulation makes for high abrasion resistance and easy routing. Is the Vehicle Control Module an ECM by another name? Painless Performance 60211 Standard Length MPFI Harness for 1996-2000 GM Vortec 7.4L V8, Innovative Performance Chip/Power Programmer, Big Autoparts Ignition Distributor Set DR474 DR331, ELGIN Industries HL-7003S Hydraulic Roller Valve Lifters set, Painless fuel injection wiring utilizes all new TXL wire, OEM fitment connectors and grouped harness breakouts making for an easy install and saving you from using old re-worked wiring; Machine crimped terminals match OE quality. 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 won't change the exhaust or add a ring eating K&N. Could you do a downstream 02 sensor delete? Marks spare time was heavily consumed by reading automotive magazines and wondering how in the heck people could land a job testing cars all day. It gets you an EGR blockoff plate for the Vortec 4.3/305/350 engines. Seems like it's lacking power towing my boat. That said, the main internal differences between the L29 and L21 is that the L21 has forged pistons and crankshaft. To find out just how much the 30-year-old behemoth could muster, they took it to Westech Performances dyno room. I own a 1998 Safari Trek 2830 P32 chassis with an L29 28'7" Class A RV Drivetrain it s completely OEM.. Explore Our Forums. I called Banks Power last week to try and find out what they recommend. 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*. I installed a K&N replacement are filter in the stock air box. I am upgrading the fuel injectors with the new Bosch III's and the plugs and wires. It may or may not have a decal on the ECM depending on if they did a mail order tune or came in to our shop. We can accommodate your requests for the oxygen sensors, speedometer adjustment and increased HP/TQ. Anything that will help the performance. The main improvements will be improved shifting and overall more torque to pull hills. I have the parts list and see one item called 01-412-8 hyd roller cam for $315. We have a complete Banks Power System and Banks Air Flow. Use a set of long-tube headers (exhaust manifolds) and an aftermarket exhaust system. The tire are one size larger than stock to the speedometer is off a little. Reference core exchange, what is the time limit for you to receive the exchange? If you can supply me with your VIN and any part #'s that are on the ECM I can do some research. A restrictive or clogged air filter makes the engine work harder to breathe, which reduces efficiency. I've always heard that they were a good upgrade to the TBI 454 and earlier 454 heads. 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. If you can find this PCM in a salvage yard or from a different type of vehicle that uses the same, we can likely program it to your vehicle for you. It was bone stock 2x4 extended cab dually. The intercooler did indeed drop the inlet air temps before the carburetor from 248 degrees to 111 degrees and the cooler charge dramatically improved the power output. Have you plugged an OBD2 reader into the truck to see what it is displaying for RPM? BBK Performance Parts 1710-XD GM VORTEC 305/350/454 80MM POWER PLUS THROTTLE BOD. Yes we modify the shift patterns to hold the upper gears longer, your shift kit would not interfere or cause issues.