Combustion chamber design plays a part equally important as both geometric compression ratio and fuel octane rating. Most CI and Compression to build a Procharger engine. LSXtv is going heads-up drag racing with the help of renowned LS builders Virginia Speed. What is detonation, and how can it be controlled? The compression was high enough to help make power, but still low enough to run boost. 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. 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. Forged pistons recommended for all applications. For pump gas the compression is way too high. 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. Harley-Davidson M8 Supercharger System: (Taking orders now). You don’t have to worry about making brackets, fabricating mounts, rerouting the exhaust, or any of the other headaches associated with some of the power adder options out there. The size of headers are dependent on whether you are wanting to create more low end torque or high rpm horsepower. Of the rip, Dynamic Compression Ratio (DCR) should have been mentioned, because this can completely affect the “so called” compression ratio the … i am trying my luck with propane now. Of the rip, Dynamic Compression Ratio (DCR) should have been mentioned, because this can completely affect the “so called” compression ratio the engine sees at specific points thru rpm powerband. The Bullet rods were equally stout, being manufactured from 4330 modified forgings with … Please call to speak with a technician if you have any questions about your specific application. 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.” Click Here to Learn More . 2. Boost levels above 12 psi should generally be avoided even with racing fuel on a 9.5:1 motor. The F-3 series supercharger redesign was completed on the NMRA Super Street … 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). Depending on how hard you want to get at it, I would personally keep the compression at or tad below 11 on methanol. 400, Magna-Flow 250 or similar type fuel pump) and a return style, boost sensitive fuel pressure regulator (Mallory #4309 or similar). Procharger could've made 950hp on a high compression alcohol motor for all we know. Note how thick the transmission case is around the bearings to provide strength to these high-stress areas. Most ProCharger systems can be installed in 8-10 hours with simple hand tools. I’m currently at 20 initial and 37 total, all in @ 3200, but have bounced all over. Holley double pumper w/ mechanical secondaries. Superchargers can be used with automatic or manual transmissions and will not increase transmission wear under normal driving. It is a good idea to actually reduce the compression ratio of an engine prior to adding a blower or turbo unit, either by replacing the pistons with dished ones or by adding combustion chamber volume to the head. ProCharger racers making news in NoPrep scene! Compression ratios of 10:1 and higher require lower boost levels, higher octane fuel, intercooling, or some combination of the above. 99 Dodge CTD dually. The compression ratio that is built into your engine is called "static compression." Thermodynamics of Compression. ProCharger’s P-1X Is A Powerful Match For High-Revving Coyotes By Steve Turner April 07, 2017 Since the early days of the S197, MAK Performance in Hialeah, Florida, forged a close relationship with ProCharger. The final test of the day was to run the ProCharger on the high-compression motor. Compression ratio. 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. With a Centrifugal super charger, it is generally good to have a medium compression ratio. High compression engines need premium, since the higher compression causes fuel to explode more rapidly. For pump gas (91-93 octane) applications, a compression ratio of 8.5:1 to 9:1 is recommended for boost levels of 8-10 psi. Aluminum heads will allow you to run approximately 1 psi more boost than cast iron heads due to their ability to dissipate heat. Assuming the use of intercooling to run higher boost levels while maintaining reliability, a 100% increase can generally be achieved at around 17 psi on an engine with 9:1 compression running pump gas. Do you think a 4.625 stroke and 4.50 bore would be too … Eichorn’s plan of attack was to utilize the Coyote’s OEM block and heads and build a high compression, high RPM mill to compete with the LS. My car is a 68 Camaro, 3650 lbs. high compression and boost. To determine required fuel flow, multiply your total expected horsepower by a bsfc (brake specific fuel consumption) of .65. 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. Higher compression with supercharger or procharger? Setup as a crate engine with 8.5:1 or 9:1 compression. High compression stroker with supercharger. 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. nice engines fellas. How much horsepower will a supercharger add to my engine? Greg Fielder (@american_iron_n_cycle) has created a short video on TikTok with music Ruff Ryders' Anthem (Re-Recorded / Remastered). 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. Compression ratios of 10:1 and higher require lower boost levels, higher octane fuel, intercooling, or some combination of the above. It is very important to know or predict compression ratio with a high degree of certainty, so appropriate fuel choices can be made. If you rarely drive on boost then you want a high compression atmo engine with a fast burn and low boost. While ignition retard systems can be helpful in certain situations, they can also greatly reduce the horsepower output of an engine, as any reduction in timing will reduce horsepower. Let's turn things up a notch and introduce a little more science. Higher octane fuel will allow you to run higher boost levels, approximately 1 psi for every 2 points of octane. The higher static compression makes it easy to build torque and the not so high static also makes it easier to ramp up boost and tune. The primary issues that determine the type of fuel needed are whether the engine is fuel-injected or carbureted, the compression ratio of the engine, and whether or not the supercharger system is intercooled. Supercharging reduces weight per horsepower of the engines as required in aero engines. Let's say the "P1" is some low pressure, approximately 15 psia (standard sea-level pressure is 14.69 psia). Cast up to 450 horsepower, forged for higher horsepower or for rpm levels above 6,000 rpm. seeing how it is all race. This combination is based on a Dart Little M iron cylinder block capable of accommodating the large 4.155-inch bore and lengthy 3.875-inch stroke to achieve 421 cubic inches. It takes high compression to make it work and you probably won't get the greatest MPG as it simply takes more fuel to burn properly. I run pump E85, but can’t seem to get the timing figured out. Higher octane fuel will allow you to run higher boost levels, approximately 1 psi for every 2 points of octane. 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. Although some manufacturers claim a specific horsepower increase, superchargers actually add horsepower as a percentage gain (percentage of an atmosphere). There are plenty of high compression (SCR) engines, 10.5:1, 11, 12, 13:1 SCR & higher, & are also boosted. Open to using efi or carb. The same rules for normally aspirated engines apply to supercharged motors. If the barn door is open the horses are going to get out. High compression pistons, a racing-profile solid-lifter camshaft and a pair of four-barrel carburetors made the impossible possible. 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. 5000-5500 stall isn't unheard of in that world.....same reason as #2 For those reasons 99% of the people … On the other hand, with a low compression motor, you can throw more boost at it, and have a safer tuning experience. i am going 8.3-1 on my turbocharged 360. yep 360. i cant help but put in my picture. (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. To reduce the space occupied by the engine … ProCharger racers making news in NoPrep scene! With the engine set up at a very high compression ratio, Bruce went as far as 17:1 which raises the expansion ration. Camshaft mechanical timing, & each of the timing events, then how the electrical … edited to add: I have a friend that was making 1200+ rwhp with a supercharged 408 on E85 so I'll ask him what compression ratio he was running the next time I talk to him. It is rarely boost that causes detonation, just unnecessary heat. Of the previous, excessive heat is usually the culprit. The new impeller design has taken the x275 racing world by storm this season. It had a 13.1:1 compression ratio. For information on the warranty coverage for a specific ProCharger system, please consult the price list which is supplied with every product literature mailing. Therefore, a fuel pump capable of providing a minimum fuel flow of 55.4 gals/hr at a pressure of 21.6 psi is required. | #stitch with @therealrevlaid high compression build with a procharger... #procharger #harleydavidson #dragspecialties #merica #rippintits 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. I've heard 14 to 1 with E85 naturally aspirated so maybe 11 to 1 or so would work well with a procharger running E85. Procharger Intercooled 1998-2001 Mercruiser 7.4 MPI System . To convert to gallons per hour, divide this figure by 5.87. ProCharger® Ford Mustang GT 1999-2004 High Output or Stage II Intercooled System. 600 cfm (#4776) for up to 500 hp 650 cfm (#4777) for up to 650 hp 700 cfm (#4778) for up to 750 hp 750 cfm (#4779) for up to 900 hp All carburetor’s will require removal of the choke assembly and choke horn, replacement of the floats with the solid nitrophyl floats and jetted to suit your motor.
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