I have a 2005 H2T with 6.0 AWD. A set offorged pistonsshould be high on your priority list. However they are still gen3 engines. There are limits to this move, however. At a 50 percent duty cycle, the injector is flowing fuel only half the time. Disable the wastegate on the turbo (increasing boost production by 10-to-15 psi) and you could find another 10 to 20 hp. So, introducing 10psi of boost results in the loss of 10psi of fuel pressure at full boost. To maximize torque in the mid-range, manufactures close the intake valve at about 40 degrees (@.050 in.) However, for some car owners, that minimal difference does not offset the increased cost and complexity of switching to fuel injectors or upgrading the existing stock fuel injectors. How much HP do fuel injectors add? - FastAdvices Or is that even possible? When properly tuned, engine longevity will be increased due to the reduction in pulse width and timing. working a 2004 GMC 2500 HD With LQ4 turn out at 70,000 mile the lifters starting to fail on Number #4 cylinder causing a miss at idle . I need to know what combo to buy that will get me 700-750hp thanks fir your help. Care to share what their actual hp or % over stock was? Holleys Terminator-X EFI system is an affordable way to use a self-tuning aftermarket EFI system on your existing Gen III and IV LS engines. If i were you i would get a lift pump for now and do your sticks when you put twins on. Supercharged engines on gasoline will be represented by far less efficient numbers, meaning the BSFC number will be numerically larger. Somebody probably ran it without oil. Can a 2004 SS Lq9 6.0 plug and play into a 2005 Ls Lq4 model truck without modifications? of fuel per injector at an 80% (0.8) duty cycle. How To Choose A Digital Camera Of Your Choice? This is an important specification because fuel pressure has a direct impact on fuel flow. But before you do all of that, you need to begin considering the installation of head studs. Sizing a fuel injector on the larger side offers a benefit should you decide to boost the power at some point because the larger injector offers enough additional fuel flow to offset the minor power increase. 2005 Cadillac Escalade Lq9 ECM and harness, Im not 100% but i think at the pedal you have to swap couple wires. Thank you for any input. Thats roughly a 33 percent increase in the amount of fuel required. More power/torque would be nice, but better fuel economy would make me really happy. Truck engine bays also accommodate Tunnel Rams. 45's are enough for 800hp. from a budget point of view, I would find someone to tune the ecm with something like HP tuners . I was thinking 45's or 60's just didn't want to have any regrets Please no rod comments, I know I am getting into the danger zone, I will cross that bridge when I get to it. Aluminum cathedral port heads Conventional wisdom states that it is wise to choose a larger injector for boosted applications in order to have sufficient fuel flow beyond that required for the engines expected power level. A forum community dedicated to all things Cummins Diesel! Flow Rate Definition, Calculating Horsepower Range. These will fit the newer style injector for your 2003-2004 5.9L Cummins. 5 spd 97-up block with intake off/ IP off the 93, IP turned up, timing advanced slightly, manual waste gate running about 14psi through a gm-8, 3 inch exhaust straight through from the turbo to the 5 inch stacks behind the cab. That changed in 2001 when GM threw in the bigger cam and aluminum heads designed for the LQ9. and won't support much more than 380 hp. And just like the LLY, a tuned LBZs exhaust gas temperature can drop as much as 150 degrees F by installing one. The bigger the engine, the smoother it will idle for any given cam, which is why youll see the 6.0L LQ4 and LQ9 engines getting slightly bigger cams than the 5.3L engines. Feb 20, 2009. Thoughts ? Doing so removes the MAF restriction and will give you a bit more power. [Trying to find an LS engine for a swap or build? We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. However, there are multiple reasons for choosing a larger injector. If we divide that volume by eight injectors (for a V8 engine), this comes to 31.25 lbs/hr necessary to feed the engine. But a tuner might be tempted to bump the fuel pressure from 43 psi to 58 psi. This means if we were sizing an injector for 500 horsepower, wed add 30 percent to the 31.25 lbs/hr (31.25 x 1.3 = 40.6) and then rounding that result up to a 42 lb/hr injector. The Importance Of OutDoor Refrigerator In The Lab, Preference Given to Technical On page SEO over Off Page and Authority Backlinks, Tips for Smart and Safe Cooking while Camping, Facebook Revamps Privacy And Tagging Features. Do you have our 1000cc high-z injectors? With these categories established, we can look at some basic specs that are common to all fuel injectors. Aside from the performance hinderance, the absence of a lift pump can force the CP3 to live its life without ever seeing adequate low-pressure fuel supply. What Im banging head on is,the throttle body and intake.so I purchased a sheet metal intake and a 102mm tbody. Spring life isnt a problem because trucks generally dont spend a lot of time at high rpm. Comparable to the LLY and even the LB7, much of the piping here measures 2-inches and change in diameter, which proves to be a major bottleneck when the VGT is producing 10 to 15 psi more boost than stock. The systems are proven in NHRA championship and record-holding racecars and even in 5,000hp twin turbocharged applications. As for whether its Gen. 3 or not, the cam sensor is behind the intake on a gen. 3 and the knock sensors are in the valley. I suggest starting there. Now lets address the first question which was How much power can I make with a 42 lb/hr injector? This is a little easier since all we have to do is multiply the flow rate times the number of injectors and then divide that by the engines BSFC number. Any other use will be in violation of local, state, and federal laws. rod will ensure enough piston-to-head clearance. This is a generic graph representing injector flow in lbs/hr of flow in the vertical scale and duty cycle across the bottom of the scale. to fit the seats. Basically have the same setup you listed. Driving Line Accelerating Automotive Passion by providing a fresh angle of what fuels us. You can not run an injector at over 100% dutycycle. As you move into the 530rwhp range, youll discover that the LBZs performance potential is virtually identical to the LLYs, which also means the stock turbo, injectors and CP3 will all have to be upgraded in order to take things to the next level. We would be remiss if we failed to warn you about the LBZs biggest weak link. Horsepower Calculator - Fuel Injector Clinic Analytical cookies are used to understand how visitors interact with the website. I expected it to blow 100k miles ago and it keeps on going. The conventional BSFC number for a gasoline engine has been 0.50 which means the engine would burn a half a pound of gasoline per hour to make one horsepower. This would normally demand a 105 lb/hr injector using our previous equation. Toward the top end of the scale in the higher end portion of the duty cycle its not uncommon for an injector to lose performance relative to the straight line curve in the injector. 7522(A)(3))*, *This product is ONLY designed for closed course racing where it is legal to do so. For a stock CP3 I would go with 30 overs myself. GM made a bazillion of them which helps keep prices down. [], Has anyone ever installed 706 head on the LQ4. Typically, a supercharged engine will demand a 0.65 BSFC for gasoline. Has heads work, studs, fuel system, water meth, ats trans, after market cooler, 5" exhaust, 4.88 gears 40" tires. Just when you think youre on the path to 530rwhp or a little more, a pesky intake side restriction kills some of the fun. We will not delve deeply down the rabbit hole on this but one important aspect of injector performance has to do with how well the injector delivers fuel at both the top and bottom ends of its flow scale. Regardless of what some calculators may say, healthy 750cc injectors will easily and safely support over 800BHP all day long on gasoline. 60's from exergy tuned properly will not smoke more than stock injectors. For this discussion well use 0.50 as the BSFC number. There are some aftermarket manifolds that are high rise and will clear the accessory drive but then you run into hood issues. Boosted engines, especially belt-driven supercharged engines consume a significant amount of crankshaft power merely to drive the supercharger and the larger the supercharger, the more horsepower it takes to spin the blower under boost. Custom tuning will be required to properly adjust the fuel and ignition timing. If it has two it is a Gen 4. Dmax Store | Privacy Policy | Terms & Conditions | Leave A Review, We are not responsible for unlawful use of this product. The most popular are EV1, EV6 (USCAR), and Multec 2 connectors but there are also several import styles as well. From the Holley fuel pump lineup, this will demand one of Holleys twin fuel Dominator EFI fuel pumps that would have the capacity to meet this kind of demand. Injectors are to small for a 75 as a single IMO. Thanks for your question. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Including a maximum 70 percent duty cycle, this would put the injector size at 57 to 60 lbs/hr compared to gasolines 42 lb/hr size. This differs greatly across all injectors. When running boost, you can use a water-methanol system to supply extra fuel and lower charge air temps. [] [Looking to upgrade your LQ4 engine? Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. The factory injectors are only rated at 25 lbs. If the pump is not capable, the tuner may unfortunately discover this after the engine runs lean and burns a piston. ). I also am former USAF and again, thank you. 250cc 30% not much gain over 238cc with 30%. However, this allows for the opening and closing of the injector to be adjusted by the tuner such that it occurs ideally in conjunction with valve opening events. Which is engine management system control fuel injectors? The truck, an 06 Chevrolet Silverado 2500 HD, was making 460rwhp and 850 lb-ft of torque (and the driver was definitely enjoying himself), but the damage had already begun. The factory pump is good to about 430 whp. 250cc 100% nozzle 470-575HP. Another aspect of selecting injectors involves the two-prong electrical connector at the top of the injector. Slower spool and not make as much peak power. The Dynomite Diesel line of High Flow ISB Injectors for your 98.5-02 Dodge 5.9L Cummins are hailed as the benchmark in 24 valve performance, DDP B series Injectors rule competitions internationally. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. What size injectors do I need? - Summit Racing To avoid burning up the injectors, the maximum duty cycle should be closer to 85 percent. However, this also raises the base fuel pressure to 58 psi but then with 15 psi of boost-referenced pressure, the fuel pressure increases to 73 psi. salvage yard upgrades to be hadswapping a bunch of stock parts for a few hp.thats why i think the best route in this case is a good non stock ecm tune. on average). lift cams are popular, but LS6 springs allow you to run .550 in. Richard Holdener has some good YouTube videos on the LQ4 and its sisters. Whereas you can send roughly 90 hp over stock through the five-speed Allison, long-term , the six-speed version can handle 120 hp over the factory rating, long-term. No Core Charge. How about our 1120cc low-z injectors? When I went to Danville Performance after install to have the injectors tuned down Mark told me that a 40% over on a lb7 was like a 60% over on an LBZ. Truck engine bays make fitting turbos easy. (300 X 0.5) (8 X 0.8) = 23.4 lbs./hr. 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. Lightweight hollow stem LS3 valves can be cut to 2.000 in. Losses everywhere below 5500 rpm. No plugs on the front cover. Also if its na, I wouldnt mind going with a carb either but trying to get a path to head down. lift and extend the rpm range. Since they are BBi are we sure they are even 100%? These 30% over injectors work great in stock trucks as well as trucks with upgraded turbos and/or tuning. It started off life like any normal truck engine. This cookie is set by GDPR Cookie Consent plugin. 1.110 compressions heights can not support 0.40+ ring distances. They come in versions for Gen. 3, Gen. 4 and Aftermarket 6.125 rods. The stroked LM7\383 and both LQ7\LQ9 402cid solutions suffer this issue. These cookies ensure basic functionalities and security features of the website, anonymously. Top 10 Games Like Clash Royale and Best Alternatives to Play on Android. With a BSFC of 0.65 and a projected 900 horsepower this would mean 900 x 0.65 = 585 / 8 = 73 lb/hr. electric fans are generally better for driving in traffic and provide great performance without the hp loss of a convential hydro fan or fixed blade. In our time spent around chassis dynos, weve seen more than our fair share of Duramax-powered GMswith built transmissions, quality EFI Live tuning, but no lift pumplay down 490 to 499rwhp. Both of these ECUs contain 8:2 Amp injector drivers. He installed the 3's and power actually went down from his previous best. It is a ton of fuel. This number represents the amount of fuel an engine will require to produce one horsepower in one hour expressed in pounds of fuel per horsepower per hour (lbs/hp/hr which is commonly abbreviated to lbs/hr). These stroked solutions recommended do not seem to be conducive to proper ring pack distancing from the crown of the piston. Even small centrifugal superchargers generally demand upwards of 50 to 60 horsepower to spin. However, you can Fine-Tune Flow Rate by adjusting fuel pressure. But now we must reduce that power to our 70 percent duty cycle safety margin and now those 42 lb/hr injectors can be counted on to safely make 470 horsepower on a normally aspirated engine (672 x 0.7 = 470.4). At 60 psi, the Holley Dominator 12-1200 is rated to feed a supercharged 1,000 hp. These 30% over. Looking to get 500 whp through a t-56 In a c10 pickup and an lq4. Exergy LML 30% over New Injector Set | DMAX Store This simplified calculation does not allow room for additional fuel flow or other potential errors. Maximum injector duty cycle (IDC) (In order to be conservative, Fuel Injector Clinic recommends a maximum duty cycle of 90%.). At the bottom, the software will reveal injector output with the given pressure. At this point, we recommend you talk to your chassis dyno tuner and decide on a computer programmer. While 01-10 Duramax engines share a lot of things in common and experience many of the same hurdles in making horsepower, these power plants are all a tad different in their own ways. Tuners are often tempted to boost fuel pressure when faced with adding power to an existing package. What you need is a cam that delivers a gut-punch right where the converter hits. In this case, its indicating 36 lb/hr at 43 psi. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more! This is an EV6 style connector (also called a USCAR) but there are also EV1 and at least a few other connectors so its best to know the connector style before you order. Fuel Rails: Factory rails need to be addressed around 700 hp. The point to remember is that when sizing injectors, its crucial to also include the fuel pump needed to feed the injectors at the appropriate fuel pressure. Im looking at tick flow for heads. How To Add 300HP to Ford 6.0 Powerstroke Diesel Engine IIRC there is a guy on one of the forums with 60 or 65's that made a bit over 700HP. When using injectors in this size range, you should have a lift pump setup on your truck. For boosted engines with the injector located in the intake manifold, the injectors are forced to open against much higher pressures than with a normally aspirated engine. I want to send out a big thank you to Brian for this information. 100% over is roughly 200 hp stix from what most have said over the years. Are The New Terminator X 220 Lb/Hr Injectors Right For Your - Holley This also dangerously assumes that the entire fuel delivery system is capable of minimizing restrictions to be able to deliver this large amount of fuel at this higher pressure. Thx. Its best to measure deck height before ordering your rotating assembly. . If you are using Holleys ECU software, if you click on system ICF (individual configuration file) and then click on engine parameters, this screen will appear. It had floating wristpins, the better rods. For a better experience, please enable JavaScript in your browser before proceeding. Batten, followed by several years developing performance pistons at Wiseco Piston Co. Today, Brian develops performance parts for Summit Racing Equipment and is a regular OnAllCylinders contributor. I actually like it. So what does all of the above mean? Its two-piece design is also prone to boost leaks and even blowing apart under elevated boost pressure. You may have seen horsepower estimates for EFI systems or injectors where the peak horsepower potential changes between normally aspirated and supercharged or turbocharged applications. The reason for this conservative duty cycle is, again that injectors do not typically operate the same at the extreme ends of the output cycle as well as they do in the middle of the flow curve. You also have the option to opt-out of these cookies. Although, I noticed today that the head gasket is likely blown, hence the research on rebuilding. The fuel flow numbers will change mainly due to the BSFC number applied to that particular supercharger or turbocharger. Comparing these two injector sizes, you can see that the E85 injector comes out to 42 percent larger injector. Generally used in drag racing or sled pulling applications but can be streetable with proper tuning. If youre getting forged pistons, its best to also get forged connecting rods with 7/16 rod bolts. It made peak power at 3,200 RPM, which is about 500 higher than most other diesel V8's. To keep the airflow up, its design included four valves per cylinder . call them they will help u take about a month for delivery. As an example, lets say we need a slight increase in flow from our 42 lb/hr injectors rated at 43 psi. Because of their strength, these engines are likely to see a power-adder sooner than later.
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