I just purchased your UltraPower GM / Workhorse 1998-2000 7.4L Vortec (454) Custom Tuning. high flow intake elbow, filter and MAF In addition to the powerful YSI supercharger, the kit included a cog-drive system to eliminate belt slippage under boost. A/T Flywheel, Hedman TEMS headers, and all the other good stuff that goes with a long block. Yes our tuning does work for trucks as well. All above engines equipped wit Hydraulic Roller Lifters. 2. If you want to send your PCM in that you know is functional, that is the best way to do it. I am in a non emissions state My 98 GMC K2500 L29 7.4 litre has 2.5" true dual exhaust with pro Flowmax mufflers an X-Pipe, cat delete but still has both upstream and both downstream o2 sensors. See listing details. If you can supply me with your VIN and any part #'s that are on the ECM I can do some research. Also known as the Vortec 7400 (7.4L, Regular Production Option designation L29), Chevrolet's Vortec 454 was a modern-day evolution of the company's most legendary big block. Yes, this would be the compatible ECM with your VIN and part #. 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. I have a 98 C-3500 dually with a Vortec 454. Windage trays are thin, sheet metal plates that bolt to the bottom of the main caps and act as a barrier between the oil in the pan and the crankshaft counterweights. Check out their web sight Bankspower.com You can definitely hold on to your PCM, that is not an issue. That said, the main internal differences between the L29 and L21 is that the L21 has forged pistons and crankshaft. I sprayed starter fluid in the tbi and it fired up for a few second. You can pretty easily get 400+ horses out of that thing and it be streetable. Is there any way I could send you that one as a core in return for one to work in my 2000? Yes - We can definitely take advantage of the current modifications done to the truck and really help it out. Without going into the engine, they make a supercharger kit for it, I know whipple use to. 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 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. That just won't do. 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. We can tune it if you can build it :). It is a redesigned Chevrolet Big-Block engine and was introduced with the 2001 full-size pickup trucks. 496 cubic inches. my ecm has to be replaced. After selecting a motor, we set about making the necessary changes for our test. A restrictive or clogged air filter makes the engine work harder to breathe, which reduces efficiency. 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. Thank you. 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. If product is incorrect for the provided VIN we will contact you to revise order. I am of the same opinion that the UltraPower programming is going to be by far your best "bang for the buck". This camshaft provides more lift and longer duration using the 10-12 Manifold vacuum. All other modifications are going to be expensive, labor intensive and still not necessarily yield the same results. The bill: $3,699.96 for all but the carb. 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. 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. All rights reserved. Give me some idea as to what this product does exactly, and how I will benefit from spending $$ on it. Power & Performance News is the source for news, tech and products that help you get more performance from your vehicle. 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. It was utilized in both performance automobiles and trucks, as well as maritime and industrial applications in various combinations. I recently ordered an ecm for a 7.4 vortec and was very impressed. will your new part ecm work on this motorhome. It specs out at 265 HP@4500 RPM and 340 ft/lbs of torque@3500 RPM. Hello! Thanks. Yes, we can tune your ECM. Can you reprogram and net me the same HP & TQ numbers as the L29? This engine series was utilized on Chevrolet and GMC large truck models such as the Suburban from 1996 through 2001. Turn around time is 1-2 business days. Also I dont have either downstream 02 sensors. The peak numbers jumped from 791 hp and 713 lb-ft with no intercooler to 847 hp and 761 lb-ft with the intercooler. Reasons to buy: It is unlikely that the Vortec 454 accessories will clear the hood. K&N fuel injection performance kit. Roller Cam, .483 Lift . It was known as the Vortec 7.4 (7400, Regular Production Option designation L29) in North America and across other markets. The Chevrolet 454s of the 1970s were the most powerful, with the LS5 producing approximately 360 horsepower and the LS6 generating around 450 horsepower. Does this computer hav egr delete programmed into it. watch out for chips as they just bump the fuel curve. K&N Performance Fuel Filters are built for high flow rates and capacity while they provide outstanding filtration. I have Bosch Gen III injectors; Volant Air intake; and 3 exhaust. It is a re-programmed ECM, either you send yours in or we send you one on a core exchange. The 8.1 Vortec was produced to compete with Dodge's 8.1 Magnum V10, and Ford's V10 Triton engines of the time. Truck has k&n air filter, 2.5 inch exhaust (no cats), e3 spark plugs and 8.5mm plug wires. What type of gains could I expect with a tune for this? Sequential-Port Fuel Injection (454 only had 2 Throttle Body Injectors) 3. The 454 Vortec is the last in a line of one of the most successful classic engines in GM history. 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. Is this enough information to create a tune or will you need more information? Is there anything to be gained within my parameters? I am considering your tune for my motorhome. Right now I have a CAI, 2" full length headers, 3" dual exhaust and EGR delete. For a better experience, please enable JavaScript in your browser before proceeding. Seems like it's lacking power towing my boat. . Using 3.5-inch aluminum tubing from CXRacing, we configured the intercooler between the YSI supercharger and the blow-through carburetor bonnet. 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. Chevrolet 7.4 Vortec was a modern-day improvement of the firms most legendary big block. Our typical turn around time is 2-3 business days. We gain on average 45-50 horsepower and 50 ft. lb. 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. Although Chevrolet doesn't specifically recommend it for this engine, the extreme slipperiness of a full synthetic will allow you to run a thinner weight oil without worrying about undue engine wear. 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. (454 used only MAP) 2. 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. 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. I own a 1998 Safari Trek 2830 P32 chassis with an L29 28'7" Class A RV Drivetrain it s completely OEM.. It may not display this or other websites correctly. The greater the power gains, the bigger the budget. If I order a ecm reprogram will this fix my speedometer error too?? I am ready to pull the trigger if I continue to run 87 octane fuel. 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. Precision Auto Injectors Set of 8 Genuine OEM 1996-2000 GMC Chevy 7.4L 454CID Vortec Rochester Fuel Injectors. 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? Would the retuned ECM provide any performance gains above what are present now? Both Vortec 7400 heads (the '98-'01 12560241 and the '96-'01 10141279) have about 100cc chambers. The UltraPower ECM performs very well on both stock engines and ones that have been upgraded with other modifications. Steel Camshaft 4. I was interested in your tune for this engine and was wondering what your best guess on the horse power / toque gains would be. 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. Technical Specifications: No filter cleaning required for up to 100,000 miles. Mfg Performance Parts www.straubtechnologies.com www.distributorgears.com When it shows 55 MPH your actually going about 57 to 58 MPH. Will the UltraPower tune, give me the "best bang for my buck" performance increase? I plan on the injector and ignition work done in march. Hot Rod decided to bolt up some typical speed parts. 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? Weve seen a few 1996-1997 PCMs with this issue. 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. A few weeks ago I bought a very low milage 454 Gen. VI L29 Vortec engine with hydraulic roller. Im also trying to get more out of this engine without tearing into it so I was just hoping this fixed my gauge as well. It was produced as a gas alternative to the new Duramax LB7 diesel, offering a high-torque gas engine capable of towing just about anything. Body Diameter: 16 mm. 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. Change to a synthetic oil that is light-weight. I want to install a cam while you have the ECU. will i notice anything? 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. Alright Jay! If it does work what would do for pulling and climbing hills? It can be done fairly cheap , power for days and 15-20mpg, I repeat. Yes we modify the shift patterns to hold the upper gears longer, your shift kit would not interfere or cause issues. Parts overview- James L29 Vortec 454 build Ep2 - YouTube 0:00 / 19:37 Parts overview- James L29 Vortec 454 build Ep2 20,387 views Oct 10, 2019 391 Dislike Share Save Dick Hamm 4.68K. Thinner oils allow the internal engine components to spin more freely and effectively, which improves their function. Is it actually running at that RPM or just showing that? I've made several performance upgrades myself, but are always looking for something better. Install a high flow air filter and cold air induction intake. The 4300 was GMs first Vortec-engine V6, released in 1986 and designed for trucks. 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!). 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. 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. 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. Programmers. We don't however specialize in forced induction applications so we would not be able to help you with that. There is a small red wire that has never been connected to anything. 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. This is not an automatic check, it is performed manually by a parts specialist once the order is placed.