High compression pistons, a racing-profile solid-lifter camshaft and a pair of four-barrel carburetors made the impossible possible. Centrifugal supercharging is the only way to make a reliable 500, 600, 700+ horsepower on otherwise stock, daily driven V-8's. I had a 2v before the 4v. Even in the case of "perfect compression" (100% adiabatic efficiency, which is physically impossible without an intercooler - see chart), air temperature would increase by approximately 71° at only 8 psi, while the lower (40-80%) efficiencies of all non-intercooled superchargers produce substantially higher temperatures. roller, hookers, edelbrock air gap, and a Fast efi 2.0. The compression was high enough to help make power, but still low enough to run boost. LSXtv is going heads-up drag racing with the help of renowned LS builders Virginia Speed. To convert to gallons per hour, divide this figure by 5.87. Most ProCharger systems can be installed in 8-10 hours with simple hand tools. What is detonation, and how can it be controlled? With that real high compression using a blower and a wedge head, the power stroke starts on one side of the dome. The size of headers are dependent on whether you are wanting to create more low end torque or high rpm horsepower. Setup as a crate engine with 8.5:1 or 9:1 compression. I would take a procharged engine ANY DAY over a larger "high compression" engine. Running 25 psi of boost, the peak power checked in at 1,350 hp and 1,020 lb-ft of torque. Of the rip, Dynamic Compression Ratio (DCR) should have been mentioned, because this can completely affect the “so called” compression ratio the … More Toyota Supercharger Systems shipping: 2020-2016 Tacoma 3.5L. Greg Fielder (@american_iron_n_cycle) has created a short video on TikTok with music Ruff Ryders' Anthem (Re-Recorded / Remastered). Now that we have low- and medium-octane gasoline, and high-octane E85 ethanol plus racing fuels, it is more important than ever to match compression ratio to the intended application and the fuel that will be burned. Race-only products and ProCharger systems with certain higher-performance upgrades/options may require some minor vehicle modification. Most ProCharger systems are covered by a 1 year warranty, although a 3 year extended coverage policy is available for many automotive and truck applications. ⦠The compression was high enough to help make power, but still low enough to run boost. 11.5 compression, shaved, ported iron oval heads with 2.19/1.88 valves, mild hyd. The LS7 has a high, 11.0:1 compression ratioâway too much for a street-driven blower engine. Although roots superchargers have significant parasitic load and do dramatically decrease fuel economy, centrifugal superchargers will yield approximately the same fuel economy as normally aspirated engines, under normal throttle conditions. With a Centrifugal super charger, it is generally good to have a medium compression ratio. Today's pump gas will only tolerate a finite amount of heat before it pre-ignites and causes detonation. Being one of the first C7 Corvette Stingray systems on the market, we were eager to get our hands on the ProCharger kit to install it in our C7. Procharger Intercooled 1998-2001 Mercruiser 7.4 MPI System . Click Here to Learn More . You can have a 16-1 static compression engine that is really like a 10-1 compression engine, if the cam opens and closes at certain points. The following specifications are general guidelines offered to aide in building an engine for street use. Not only does the kit offer strong power gains, but it does so using only 7 psi of boost and high quality pump gas (91 octane or greater). Do you think a 4.625 stroke and 4.50 bore would be too ⦠Intercooling, on the other hand, actually removes the heat which causes detonation, and allows higher boost levels to be safely run with full timing on pump gas. What type of warranty is provided with ProCharger systems? Note how thick the transmission case is around the bearings to provide strength to these high-stress areas. Camshaft mechanical timing, & each of the timing events, then how the electrical ⦠First, an efficient supercharger system can produce yesterday's musclecar performance using today's low-octane gasoline, with exceptional reliability and minimal impact upon fuel economy. Depending on how hard you want to get at it, I would personally keep the compression at or tad below 11 on methanol. The results speak for themselvesâ550 RWHP to 750 RWHP on stock 4V engines. Let's say the "P1" is some low pressure, approximately 15 psia (standard sea-level pressure is 14.69 psia). Most ProCharger systems are 50 state legal. Build my wife says I don’t need- looking to build an all aluminum 555 motor. Setup as a crate engine with 8.5:1 or 9:1 compression. For information on the warranty coverage for a specific ProCharger system, please consult the price list which is supplied with every product literature mailing. Of the rip, Dynamic Compression Ratio (DCR) should have been mentioned, because this can completely affect the âso calledâ compression ratio the engine sees at specific points thru rpm powerband. Holley blue, Comp 140 or similar). May style combustion chambers were used in the Jaguar XJS HE, 5.3 litre V12. Look at it this way- with a procharged engine you have all of the benefits of a high compression engine (power when you need it) and non of the dis-advantages (additional heat, no need to have high compression pistons when you are running a procharger) Second, superchargers have developed to the point that they are easy to install and simple to maintain, especially when compared to pulling, rebuilding and fine-tuning an engine. Today, the average high-performance street or strip turbocharged four-cylinder race engine sports a compression ratio of 9.5:1, with some even running compression ratios as high as 11.5:1 or more on alcohol or E85. After adjusting for thermal and mechanical energy transfer, if an efficient centrifugal supercharger is generating 7.5 psi (approx. 99 Dodge CTD dually. If you drive on boost more of the time then you might want a low comp engine. A rich alcohol fuel mixture also cools the cylinder away from auto-ignition temperatures. Will a supercharger shorten the life of my engine or drivetrain? At higher boost levels, the heat generated by compressing air will produce diminishing returns as the boost is increased, although the use of intercooling or racing fuel can avoid this scenario of diminishing returns. just switch it over to E85, not only will it really cool the boost charge down which will help you, it also is cheaper then regular gas and 105 octane. Engine would be built and a pro charger … Oct 3, 2020 #1 I have all the necessary parts except for the pistons to build my procharger engine. To determine maximum operating fuel pressure requirement, add your maximum boost pressure to your initial idle fuel pressure. In short, supercharging delivers exceptional performance with little of the hassles traditionally associated with high performance. How long does it take to install a ProCharger system? (8 psi idle fuel pressure) + (10 psi boost pressure) = 18 psi max fuel pressure, Multiplying this figure by 1.2 (20% safety factor) gives us 21.6 psi. Compression ratio. Harley-Davidson M8 Supercharger System: (Taking orders now). Higher compression with supercharger or procharger? MPR has not only developed a lot of ProCharger Coyote engine combinations, but they have also won several drag racing championships with similar combinations. For carbureted engines with compression ratios of 9:1 or less and boost levels in the 8-14 psi range, pump gasoline works very well. Although forced induction engines usually produce far less heat than comparable naturally aspirated high compression engines, the cylinder temperatures in intercooled engines are radically cooler yet. Read this entire manual before you attempt to install your ProCharger kit. any blower is a good blower to me but high compression is scary. Lobe separation: 112 to 116 degrees Split pattern: Exhaust duration and lift approximately 10 degrees and .010, respectively, greater than intake. Or by using a boost referenced mechanical fuel pump only (up to 500 hp) or a boost referenced mechanical fuel pump in conjunction with a low pressure electric pump (i.e. These rich air/fuel ratios can be run with a predominant alcohol fuel since alcohol does ⦠This is especially true of centrifugal supercharging, which generates boost in line with engine rpm, unlike roots and twin screw blowers, whose low rpm boost can place additional strain on the engine and drive train. BUILDING THE SHORT BLOCK . My AR 132 plugs are always brown to black. I run pump E85, but canât seem to get the timing figured out. It is very important to know or predict compression ratio with a high degree of certainty, so appropriate fuel choices can be made. To determine required fuel flow, multiply your total expected horsepower by a bsfc (brake specific fuel consumption) of .65. See all 26 photos The stock 6.4L was a perfect candidate for the ProCharger High Output (HO) Intercooled System, which works well with the Challenger's stock compression ratio and operates on ⦠Contact a cam manufacturer for lifts and durations that best suit your application. 5000-5500 stall isn't unheard of in that world.....same reason as #2 For those reasons 99% of the people ⦠(The compression ratio doesn't change but you've stuffed more ⦠Compression ratios of 10:1 and higher require lower boost levels, higher octane fuel, intercooling, or some combination of the above. If you have a high compression ratio, such 9.5:1 or 10:1, you will only be able to run a small amount of boost. It does work however. Last season, the engine was raced with 11.5:1 compression, ... ProChargerâs patented, high-speed compound bearing assembly, and precision-ground 9310 steel gears. Higher octane fuel will allow you to run higher boost levels, approximately 1 psi for every 2 points of octane. Big-block builds come in many shapes and sizes, or more accurately displacements, but this build offers something special. That would be a lambda of less than one in the EFI computer world. With that real high compression using a blower and a wedge head, the power stroke starts on one side of the dome. i have had good luck with holleys and blow throughs. The torque rush is addictive. I think that the compression of the engine is just simply too high to add boost reliably. For carbureted engines with compression ratios of 9:1 or less and boost levels in the 8-14 psi range, pump gasoline works very well. 20 pounds of boost. For carbureted engines with compression ratios of 9:1 or less and boost levels in the 8-14 psi range, pump gasoline works very well. Although some manufacturers claim a specific horsepower increase, superchargers actually add horsepower as a percentage gain (percentage of an atmosphere). Boost levels above 12 psi should generally be avoided even with racing fuel on a 9.5:1 motor. I went a point lower than ⦠Open to using efi or carb. Higher flowing heads will help generate more horsepower than stock heads. When racing, however, the additional torque provided by supercharging will place additional load on the transmission, especially when increased traction is present, such as with slicks. seeing how it is all race. However, the real killer for these engines is detonation. The compression ratio is now lower than the expansion ratio. Any turbo or supercharger kit should include 8.5:1 compression pistons and beefy rods. Carburetors deliver the vast majority of fuel in a liquid state, and as this raw fuel atomizes from liquid to gas, a chemical state change actually occurs. There are plenty of high compression (SCR) engines, 10.5:1, 11, 12, 13:1 SCR & higher, & are also boosted. On the high-compression short-block, the Kenne Bell supercharger pumped out 600 hp at 6,300 rpm and 539 lb-ft of torque at 4,400 rpm. LSXtv is going heads-up drag racing with the help of renowned LS builders Virginia Speed. Compression in the 8.5-9.5 seem to be the Best for the Heavily Boosted Modular Motors but there's also lots of 99-01 Cobra guys with bolt on ProCharger and Vortech Kits running the stock higher compression, it's in the Tune! This can be accomplished by an all electric high pressure-high flow fuel pump (i.e. Harley-Davidson M8 Supercharger System: (Taking orders now). 1/2 an atmosphere), you will see around a 35-40% gain in horsepower and torque at your non-supercharged maximum horsepower rpm. Cast and hypereutectic pistons can be used but should be limited to lower horsepower (approx 450-500 hp) applications. ProCharger uses billet impellers exclusively in its supercharger units, and the benefits are more than just superior strength. To determine the maximum boost level for your compression ratio (using pump gas), refer to the enclosed compression ratio chart. Probably the next year. | #stitch with @therealrevlaid high compression build with a procharger... #procharger #harleydavidson #dragspecialties #merica #rippintits Modern technology allows our racing generation to get the best of both worlds. It really depends on what motor the blower is attached to. For information on the regulatory status of a specific ProCharger system, please consult the price list which is supplied with every product literature mailing. Now with the addition of a ProCharger supercharger you can bolt-on an extra 110+ HP over stock with a Stage II Intercooled Tuner Kit at the factory boost of boost your effective compression would be between 14.1-15.4. Supercharging produces a percentage gain in horsepower; by starting with more base horsepower a modified motor will receive a larger total hp gain (from the same percentage gain). For more detailed specifications regarding your specific application or for "strip only" use, please consult a professional engine builder. See all 30 photos ProCharger's Stage II kit was selected for the Camaro, but the standard P-1SC-1 head unit was upgraded to the higher-output P-1X. But yes this is a good example for the OP. To give you an idea of this, an 11.5:1 compression motor may have cranking presures of 165 psi whereas another 10:1 motor may show 190 psi. LOTS of cam!!!! All Intercooled ProCharger systems for street applications are designed to allow the use of pump gas with full timing and will not affect daily drivability. Forged pistons recommended for all applications. 2. high compression and boost. Assuming a properly tuned system, proper oil change and engine maintenance, and similar driving, supercharging generally will not shorten the life of an engine, just as is the case with OEM turbocharging (with proper cooldown for turbochargers. Right now i'm going to get forged pistons 11:1 compression as one my set up so i could run with the NOS direct port but the thing i'm worried about is i might get supercharger in the future would i be able to run with this high compression and no problem at all.The thing that i know is if you run with force induction you need a low compression. Compression ratios of 10:1 and higher require lower boost levels, higher octane fuel, intercooling, or some combination of the above. 2001-1999 COBRA (4.6 4V) When compared with the meager 35-40% ⦠How will a supercharger affect my fuel economy? My car is a 68 Camaro, 3650 lbs. Compression in the 8.5-9.5 seem to be the Best for the Heavily Boosted Modular Motors but there's also lots of 99-01 Cobra guys with bolt on ProCharger and Vortech Kits running the stock higher compression, it's in the Tune! AFR is 9.5 cruising. The take-off by heavily loaded aircraft, the quicker rate of climb, and high altitude performance can be achieved to the same extent by supercharging. Bolt-on 70-75%+ more HP! Compression ratios of 10:1 and higher require lower boost levels, higher octane fuel, intercooling, or some combination of the above. This is a discussion on high compression and boost within the Forced Induction forums, part of the LSx Technical Help Section category; I have had a turbocharged car running approx. Detonation is generally caused by excessive heat, excessive cylinder pressure, improper ignition timing, inadequate fuel octane or a combination of these. Thermodynamics of Compression. However, Hall says, “The direct injection gave us the buffer and allowed us to still run seven pounds of boost and still have accurate and stable fuel and injection conditions.” (500 boosted hp) x (.65 lbs/hr/hp bsfc) = 325 lbs/hr fuel flow, 325 lbs/hr / 5.87 lbs/gal = 55.4 gals/hr fuel flow. Finally, unlike nitrous oxide, which requires frequent repurchase of fuel, once a supercharger is installed there is no more expense or hassle associated with performance. If detonation forces you to use an ignition/timing retard system, you will of course see less of a gain because backing off several degrees of timing will greatly reduce an engine's power output.
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