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. The problem is that the engine starts to sound REALLY good and owners find themselves wanting to go faster. The base estimate number of 1.25 lb/ft per cubic inch is a generic estimate. equals 432 lbs./hr. You may also see injectors rated in cubic centimeters per minute (cc/min). We know this would technically be a roadblock for all 01-16 Duramax mills, but the fact that these engines didnt leave the factory with a lift pump supplying fuel to the CP3 injection pump is a definite drawbackand one that leaves horsepower on the table. Determining injector size for a supercharged engine makes both the BSFC and duty cycle numbers doubly important to ensure the injectors are adequately sized. Some very high flowing applications require each injector to be driven in a 8:2 Amp mode. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more! The stock heads can be CNC ported for more airflow and milled up to .030 in. They have stronger wristpins, thicker ring lands, and the added valve reliefs allow you to run big cams. Thank you for any input. The cookies is used to store the user consent for the cookies in the category "Necessary". The blueprint deck height of the block is 9.240 in., but its common to find them in the 9.230-in. This is one reason why using 70 percent duty cycle in injector estimating is important so that the ECU does not operate the injector in an area where it may not be able to deliver 100 percent of its rated fuel volume. Along with proper sizing you also need to take into consideration the height of the injector along with its electrical connector. Engine, Goal: 500 HP Normally Aspirated with a V8 Engine, (HP x BSFC) / 8 = Individual Injector Size in lbs/hr, (500 x 0.50) / 8 = 31.25 lb/hr at rated pressure. wall pushrods. As weve seen from our previous fuel pressure math, this is worth 15 percent additional flow. Unfortunately, the realities of internal combustion engines are not quite that simple. [] LQ4 LS engine swap is a smart way to make a Jaguar fast and reliable. Come join the discussion about reviews, drivetrain swaps, turbos, modifications, classifieds, builds, troubleshooting, maintenance, and more! I also am former USAF and again, thank you. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. How To: Properly Size Fuel Injectors For Your Engine So for a 900 boosted engine, a 95 to 100 lb/hr injector would be a good starting point. Any power will put you well past the limitations of the stock injectors and pump. Need the best pistion crank and rods to use that wont break the bank. for more compression. The most popular are EV1, EV6 (USCAR), and Multec 2 connectors but there are also several import styles as well. ???? I have a 2003 2500HD 6.0, I bought an engine out of 2000 cast iron engine. Dont have a lot of money basically want to do cheap salvage yard upgrades/swaps. 238cc 80% nozzle 450-520HP. Does it have floating pins and better rods? Dynomite Diesel 100 Horsepower Injector Set 98.5-02 Cummins You can not run an injector at over 100% dutycycle. from a budget point of view, I would find someone to tune the ecm with something like HP tuners . A "100HP" injector is usually around the area of 40% over. This simplified calculation does not allow room for additional fuel flow or other potential errors. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. At the bottom, the software will reveal injector output with the given pressure. That is why I'm not too concerned with rod danger zone hp, I am not trying to bend one but if it happens, it happens and ill deal with it then. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Daniel Defense firearms, parts and accessories. 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. Also if its na, I wouldnt mind going with a carb either but trying to get a path to head down. It gets sketchy above that number due to the other variables that are involved with HP levels much above 550. 45's are enough for 800hp. By clicking Accept All, you consent to the use of ALL the cookies. These trade a little bit of torque down low for more up highand nothing looks cooler. Looking for some opinions on what size injectors I should run. There are some aftermarket manifolds that are high rise and will clear the accessory drive but then you run into hood issues. Im doing a LS swap in my 57 Chevy bel air. Once again, its the Dmaxs old foe: the airflow-squandering factory Y-bridge. Engine aspiration, {Turbocharged, Supercharged, and Naturally Aspirated engines have different BSFC's (see Glossary of Terms for definitions)} Below is a outline of some basic information regarding injector sizes. injectors only support about 390 hp. Most LBZ owners opt to upgrade to a full 4-inch or 5-inch exhaust system at the same time the 3-inch downpipe goes in, which provides further EGT reduction. Thanks 2005 LLY Crew Cab Short Bed, Red. Can a peak and hold ECU control a fuel injector? [] [Looking to upgrade your LQ4 engine? I went with a Brian Tooley Racing Stage 1 cam in my LQ4. I actually like it. You can read about them here: https://www.onallcylinders.com/2019/02/01/pro-ls-profile-summit-racing-makes-choosing-forged-piston-ls-engine-easy/, Daniel, it is likely a gen. 3 engine. We are not responsible for unlawful use of this product.*. Injector flow size - make sure you select cc/min or lb/hr in the drop down, (The amount of fuel you can supply your engine directly affects the amount of power that engine is capable of producing.) I never said I didn't like smoke! 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. And I fear above a 93 octane. Yes, I would like to receive communications including news, special offers. Go there and search LS engines for a comprehensive collection of LS engine tech information.). Are The New Terminator X 220 Lb/Hr Injectors Right For Your - Holley The 6.0L iron blocks had short cylinder sleeves (5.430 in. The burnt C3s pictured above came out of a stock six-speed, which had only been exposed to additional horsepower for 11,000 miles. Not sure that's why I'm asking. FEATURES & BENEFITS: Brand New. There are three popular electrical connectors that are not interchangeable so its important that if you already have a wiring harness that the injector you choose should sport the correct connectors. Iron heads, small cam and the old SBC crank rear flange thickness. With advances in engine combustion efficiency and reduced friction this number often drops to 0.45 or lower. Running six injectors at 72 lbs./hr. So stage 2 made 950 but stage 3 is only good for 1080 (tested) but stage 4s would be good for over 1200? Boiling Point, Part 1: How Far Can You Push Your Ford Diesels Transmission? This makes it easy to calculate injector sizing based on fuel pressure. Custom tune Eden Automotive Tucson, Arizona / Evan (5700+ tunes to date). Low impedance injectors require a peak-and-hold injector driver. A forum community dedicated to all things Cummins Diesel! Duramax Diesel Owner. How much HP is 100 over injectors? Maximum injector duty cycle (IDC) (In order to be conservative, Fuel Injector Clinic recommends a maximum duty cycle of 90%.). TheLQ4 served in anything from bread-vans and boats to SUVs between 1999 and 07. Which is engine management system control fuel injectors? The cookie is used to store the user consent for the cookies in the category "Other. Apr 5, 2013 Looking for some opinions on what size injectors I should run. This differs greatly across all injectors. Dynomite Diesel New No Core 180 Horsepower Injectors 03-04 Cummins Im looking at tick flow for heads. 7522(A)(3))*, *This product is ONLY designed for closed course racing where it is legal to do so. Converter recommended. What do you prefer on cam size and should I use truck flow for heads n cam or do you have any suggestions?i dont have tons of money I just want a good product. At wide-open throttle, the engine is at 100 percent volumetric efficiency, and the system says there is full airflow, 50 cubic inches to fill, and 13.0:1 commanded air/fuel ratio. If the injectors are on the small side, adding fuel pressure will help. 250cc 30% not much gain over 238cc with 30%. Richard Holdener has some good YouTube videos on the LQ4 and its sisters. Has heads work, studs, fuel system, water meth, ats trans, after market cooler, 5" exhaust, 4.88 gears 40" tires. INJECTORS: 60% over = ??HP | Cummins Diesel Forum If you are not sure how much horsepower your engine can potentially make, there is a simple formula that is easy to use. For nearly all street applications the high impedance injectors are the far more common selection. Will sense i will be diving into motor what can I do for a little more power and still pass smog. But even though the six-speed Allison is tougher than the five-speed unit it replaced, its still not strong enough to handle that 500rwhp tune in your arsenal. FuelTech FT600, FT550, FT550LITE, and FT450 engine management systems are capable of controlling any fuel injector sizing, even the massive 850 lb/hr injectors found in super-high horsepower applications. That means we have to multiply 432 x 0.85 = 367 lbs./hr. Chad White 2006 GMC Sierra 2500 CCSB LBZ 4wd Gen 3 dont have a cam sensor in the front cover gen 4 has a cam sensor, [] [Note:To learn about effectively upgrading the LQ4 engine, read:LQ4/LQ9 Engine Upgrade Guide: Expert Advice for LQ4 & LQ9 Mods to Maximize Performance.] I expected it to blow 100k miles ago and it keeps on going. Did 420hp with predator programmer, 190cc injectors and stock turbo. Although most EFI systems have tables to correct this non-linearity, it is best to avoid operating the injector in these ranges. I would like to turn my 350/5.7 vortec into a LS motor (if possible). We always recommend the addition of a lift pump, but at this level isnt required. Lightweight hollow stem LS3 valves can be cut to 2.000 in. Would be good to actually know. I keep looking for an engine combo with good compression height for nitrous\blower application. Weaker engines may drop to perhaps 1.2 or lower while others are capable of 1.35 and better. of total fuel. 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. It also makes it easier tune for a bigger cam and injectors later on. This means ethanol requires approximately 30 percent more fuel in order to produce the same amount of heat which equates directly to cylinder pressure and horsepower. 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. What size injector should I be looking at? Displacement x 1.25 lb/ft /ci = Peak Torque, Peak Torque x 0.9 = Torque at Horsepower Peak RPM / 5,252 = Peak HP, 393.7 x 6,000 rpm / 5,252 = 449.8 rounds up to 450 horsepower. All injectors are rated to deliver a specific amount of fuel at a rated pressure. I know a 45 over injector can drain a 40 over pump down at a 2500 rail(seen this on 2 different trucks both running II 45 overs with there 40 over pump), so a modified stock pump will probably only like to hold about a 2100-2200 with a set of 40 overs. Check outLQ4/LQ9 Engine Upgrade Guide: Expert Advice for LQ4 & LQ9 Mods to Maximize Performance.] A rotating LS assembly kit from Summit Racing would be my recommendation. Hint #1: the downpipe fitment is the same on all 04.5-10 engines (LLY, LBZ and LMM, respectively). The addition of a Peak & Hold driver box to any ECU allows ultimate control of low impedance fuel injectors. In this case, its indicating 36 lb/hr at 43 psi. 07 5.9 3500MC;SRW: billet trans, triple disk, AD2 165, H11,Coolant bypass,Pipe Plugs,103# springs,Manton S5 PR, 60% sticks ,10mm CP3,Stocker Under S475,EFI Live,Edge CTS, Auto meter boostx2,1 piece-shaft, 6" TGC long arm, Toyo MT 35x22 Fuels. The problem quickly becomes a matter of fuel pump capacity. 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 . Wanting to do cam swap and possibly LS3 heads. So what does all of the above mean? 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. For example, a naturally aspirated, 300 hp engine (BSFC 0.5), with 8 injectors will need 23.4 lbs./hr. The Fora platform includes forum software by XenForo. More power/torque would be nice, but better fuel economy would make me really happy. Driving Line Accelerating Automotive Passion by providing a fresh angle of what fuels us. Their customer service was very knowledgeable and a big help. Peak and hold drivers allow for a higher opening current (peak) and then drop and maintain a lower current (hold) after the injector is open. What this means is that 70 percent would present a much wider safety margin for computing injector use. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. The factory truck-style manifold has long runners for better low-end torque. Fuel Injectors: The standard 28lb. Everyday driver averaging 15.8 to and from work . They flow great and the cross-sections are great for boost. We recommend a dedicated truck cam. 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. 2 Year Unlimited Warranty. Long tube headers with 3 inch mandrel bend back cat . Before you go, make sure to install a colder thermostat to open up the tuning window. Build a stroked version of what you have now and it will be bullet proof using forged internals. Maybe it was really a quadruple-demic. Beyond the size of the injector, there are also the physical dimensions of the injector to consider as well as its electrical connections. Have a 2005 Yukon xl Denali with the LQ4 6.0L what other factory parts will give me a little more hp and torque? Slower spool and not make as much peak power. Upgrading to larger injectors is needed for more. Necessary cookies are absolutely essential for the website to function properly. However, you can Fine-Tune Flow Rate by adjusting fuel pressure. That is the route I would go. Either way is nice, but would love to know for fact. Duty cycles higher than 85 to 90 percent risk running into inconsistent fuel delivery issues. 2017 RCSB F150 5.0 - On3 Twin Turbo, Fore Fuel System, Boss 302, FIC 1300's, E85, Oh no not the dreaded BBI thread again lol, 06 laramie mega debadged 5'' tbe, s&b cai, gdp 5.9 airboss, ats arcflow, airdogII 165/w beans sump, isspro gauges,arp 625's, firepunk comp2, hamilton 103's,extreme duty push tubes,ED/S&S 100%overs,ats duel pumps, efi by Gordon, SD 5 blade compounds on the way, I guess I can only wait and see when I have it in the dyno. As an example, lets say we need a slight increase in flow from our 42 lb/hr injectors rated at 43 psi. This cookie is set by GDPR Cookie Consent plugin. Fuel pumps: The factory pump becomes a limitation at 450 hp. They come in versions for Gen. 3, Gen. 4 and Aftermarket 6.125 rods. Trucks often come with mechanical fans that sap horsepower. I want to send out a big thank you to Brian for this information. There big enough to need twins/big singe, twin pumps or a stg. Lets calculate how an increase in fuel pressure to 58 psi will increase flow. open. 8 x ExergyLML 30% over New Injector Set, Part# E02 10506. Check outPart 1andPart 2of our LS Spotters Guide.]. To avoid burning up the injectors, the maximum duty cycle should be closer to 85 percent. Especally 60 overs. Please point me in the right direction if I am wrong. 60's would be better. What kind of HP gains with 40% injectors and a lift pump? When combined with a 4.000-inch stroke, this will increase c.i.d. injectors work great in stock trucks as well as trucks with upgraded turbos and/or tuning. Nobody likes to invest hard cash in a product only to discover it wont work due to an oversight or a lack of knowledge. If you know a little bit about alternative fuels then you may already be aware that while E85 has much going for it with regard to higher octane number performance, it also demands a much larger injector because this fuel commands a roughly 30 percent higher BSFC number. Aftermarket tensioners and pulleys may be necessary. Most Holley injectors are rated at 43 psi unless otherwise specified. If an injector is operating at an 85 percent duty cycle you will likely end up injecting fuel during valve overlap, leaving no ability to optimize injector timing. Unlike Google+ Facebook is for Every Phone! Things are going good. Valve angles are typically laid over to 13.5 degrees and 2.100 in. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Bored block 030 over forged pistons went with cam valve lift intake 515 ex 522 duration intake 259 ex 265 its LS 1 XR 259 HR -12. 100% over is roughly 200 hp stix from what most have said over the years. Like 40hp or something. Exergy LML 30% over New Injector Set | DMAX Store Nearly all of Holleys injectors are rated at 43 psi unless otherwise specified. Oct 11, 2011 I dont know how much you will gain with just 40's but once you add twins and 40's you will be looking at around 650rwhp. With a 220 lb/hr rating (at 43 PSI base fuel pressure), this injector is well suited for V8 engines making upwards of 2,500 horsepower on gasoline. That is the only reason I considered going smaller, Hate to run a massive injector and go backwards in hp from not having enough fuel pressure. Drop-in dual pumps are a common upgrade. We changed the fuel system pressure (in the Fuel System box) to 58 psi and the number on the lower right changed from 36 lb/hr to 41.8 lb/hr. 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 . The smart move in this case is to size the injectors much larger by perhaps 20 to 30 percent in anticipation of adding more power while not requiring a large increase in fuel pressure. rod will ensure enough piston-to-head clearance. However, you may visit "Cookie Settings" to provide a controlled consent. This can be accommodated by changing the BSFC curve. As mentioned before, the pistons are a weak point and you probably know a guy thats popped one. I need to know what combo to buy that will get me 700-750hp thanks fir your help. Batch fire mode commands each injector twice in the cycle. So sizing an injector for use with E85 automatically will demand an injector that is at least 30 percent larger. How much rwhp can 19lb injectors make - Ford Mustang Forums If youre looking for more power and torque, the Trailblazer SS intake is a step up and a larger 90mm 4-bolt throttle body can be fitted. Calculating Individual Injector Size from a HP Goal 8 Cyl. The stock rockers are good to 175 lbs. As an example, lets assume our 900 horsepower engine with a supercharger making 15 psi of boost. These cookies ensure basic functionalities and security features of the website, anonymously. 100hp injector vs 100% over injector - Chevy and GMC Duramax Diesel Forum (Information for this article originally appeared in thisUpgrading the Gen. 3, 6.0L, Iron Block, LS Truck Enginesarticle atSummit Racings searchable database of FAQ tech info. Not unlike the LLY, the LBZ Duramax left the factory with a highly restrictive downpipe hanging off the back of the Garrett GT3788VA variable geometry turbocharger (VGT). These engines are some of the most popular GM LS engines for several reasons: Do they have a downside? They just dont make the power that they claim they do. How about our 1120cc low-z injectors? Truck engine bays also accommodate Tunnel Rams. Hint #2: exhaust systems for the 01-04 LB7 will fit all 01-10 Duramax trucks, minus a few subtle tweaks. Another aspect of selecting injectors involves the two-prong electrical connector at the top of the injector. No Core Charge. Built Allison = The Only Way to Enjoy Added Horsepower Theyve been known to handle over 1000 whp. Hi Kevin, Our focus in these paragraphs will be on normally aspirated street engines with some additional information regarding boosted engines and alternative fuels such as E85. When building a normally aspirated performance engine, like this 5.7L LS swapped into a 1967 Chevelle, there are some simple steps you can take to properly size the injector to the specific application. 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. Go beyond that and youre playing with fire. The 1000cc Injectors can support 650+whp. With these categories established, we can look at some basic specs that are common to all fuel injectors. We invite you to get behind the wheel with us, it's certain to be an interesting drive. Max hp from 100% over injectors - Dodge Cummins Diesel Forum Head and main studs are advised if youre making more than 850 whp. But I use as my daily driver and pull a inclosed trailer on occasions. I have an lq4 and an LAS supercharger. 1995 K2500 SUBURBAN, LB7 DURAMAX/ALISON powered. This cookie is set by GDPR Cookie Consent plugin. After a stint in the U.S. Air Force, Brian Nutter studied at the Houston, TX-based School of Automotive Machinists in 1997. Just one. Horsepower Calculator - Fuel Injector Clinic Injectors are rated at 100% duty cycle (static flow). The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Are you dreaming of upgrading to our 2150cc or 1100 high-z injectors? Being upset, he got in touch with Exergy and they said to send them in and they would see about upping the nozzle size if they could. To maximize torque in the mid-range, manufactures close the intake valve at about 40 degrees (@.050 in.) The LQ4 and LQ9 cranks were cast but strong. The factory injectors are only rated at 25 lbs. The smart move is to carefully choose your injector size based on realistic estimates of power and how the system will be used. To increase the air volume rushing into the cylinder heads, a 3-inch diameter Y-bridge is the way to go. I don't know how, but I have seen with my own eyes 2 different EFI 351 setups with vortech S-trims making around 600rwhp running 30lb injectors. It had floating wristpins, the better rods. 2006 RCLB 4x4. If it has two it is a Gen 4. Utilizing the same turbo platform as the LLY (the aforementioned Garrett GT3788VA), the same 3-inch aftermarket downpipe is used. This is a lot to demand from the fuel delivery system. to 408 cubic inches or 6.7L. As an example, lets take a typical high impedance Holley injector rated at 42 pounds of fuel per hour (lbs/hr). 60's from exergy tuned properly will not smoke more than stock injectors. The stroked LM7\383 and both LQ7\LQ9 402cid solutions suffer this issue. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Of course, an even larger injector would be a good idea for several reasons. 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. For fun, he runs his 427-powered C5 Z06 in ECTA land-speed racing, at OPTIMA street car events, and at a mix of autocross, drag racing, and track days. After that, the familiar problem of addressing the squished turbo downpipe should be addressed with a larger diameter alternative. 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. Still can drive daily. The injectors must now work against that 15 psi pressure in the intake manifold which effectively reduces the fuel pressure in the fuel rail from 43 psi down to 28 psi, which is extremely low. LQ4/LQ9 Engine Upgrade Guide: Expert Advice for LQ4 - OnAllCylinders Originally he was running flux 4.5's and bought into the bbi hype of the stage 3's making 1200 hp as they claimed. Originally founded for owners and enthusiasts of Cummins powered Dodge pickups, the Cummins Forum has expanded to include ALL Cummins Engine applications! Fuel Rails: Factory rails need to be addressed around 700 hp. How much HP do fuel injectors add? - FastAdvices A set offorged pistonsshould be high on your priority list. I have a 2013 LQ4 that I would like to add a little power and cleaner look for the injection. The best piston manufacturers have compensated for this by eliminating skirt taper until a point well above where it meets the bottom of the cylinder sleeve at BDC. Basically have the same setup you listed. The 30% over Injectors come brand newand then are honed and balanced to the desirable flow rate. Running twin CP3s or a least a modified injection pump is recommended for ideal performance. What percentage is 100 hp injectors? How To Add 300HP to Ford 6.0 Powerstroke Diesel Engine Thats engineering speak that means the injector no longer can be trusted to deliver exactly the fuel that is commanded to flow. Well there seems to a fair amount of opinions on this, I do plan to build a bottom end at some point, I was just hoping to get another year or so without doing rods. This 42 lb/hr rating may not necessarily mean very much unless you work with injectors every day. The simple formula is horsepower times BSFC or 500 horsepower x 0.5 = 250 lbs/hr of fuel. If youre getting forged pistons, its best to also get forged connecting rods with 7/16 rod bolts. An LS3 or LS9 cam makes good power, but not where you want it. The early part of his automotive career included working for engine builders Scott Shafiroff and C.J. 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. By checking this box, you agree to Nitto Tires, Find out why the LBZ is our favorite Duramax of all time right, To Smoke A Muscle CarLBZ Duramax Edition, Performance Roadblocks of the L5P Duramax, To Smoke A Muscle CarLB7 Duramax Edition, Dominating The Dirt: An Inside Look At A Duramax-Powered, Pro Street Diesel Sled Puller, Yes, I would like to receive emails from Nitto Tire and Driving Line. The systems are proven in NHRA championship and record-holding racecars and even in 5,000hp twin turbocharged applications. Now I know this is not true, but was wondering if anyone could post flow charts or other info I could show him to prove him wrong. At 216 pounds, the block is 100 lbs. We always recommend contacting us directly so we can go over your build with you and come up with the ideal setup. Thoughts ? Using 500 normally aspirated horsepower as our goal, the first thing we need to address is something called Brake Specific Fuel Consumption (BSFC). Regardless of what some calculators may say, healthy 750cc injectors will easily and safely support over 800BHP all day long on gasoline.