Your effective boost compression ratio, reflecting static c.r., cam timing, altitude, and boost of 0 PSI is 8.89 :1. Your dynamic cranking pressure is 183.23 PSI. Of the variables, the most important is cam timing which has a dramatic effect on your 'dynamic' as opposed to your static compression. Use this calculator to see what the effect of bore, stroke, rod length, cam timing, compression ratio, boost pressure and altitude is on your dynamic compression ratio. Your dynamic compression ratio is 8.89:1. Calculate Your Dynamic Compression Ratio. With the stock cam ( specs from Sealed Power stock replacement listed at Rock Auto ) Your effective boost compression ratio, reflecting static c.r., cam timing, altitude, and boost of 0 PSI is 6.83 :1. for detonation at a given compression ratio/camshaft/gas/ignition timing. Your dynamic cranking pressure is 129.94 PSI. So if it were on a B230F, compression would go to 9.3:1, basically the B230FB. Your dynamic compression ratio is 6.83:1. ( no computer controlled ignition, carb )įor the heck of it, I plugged in the numbers for an 元0 5.0LĮntering the calculated intake closing ABDC point for the '395' or ramjet camshaft ( not sure if there is advance ground in or not )Ĭamshaft, Rod Length, Boost and Altitude Correction to Compression This results in less low-end power.Anyone used one? From what I have read, ideal max dynamic compression ratio would be 8.0-8.25, 8.5 borderline for a street engine on pump gas. However, you also move the power curve higher in the rpm range. Also, what is the highest dynamic compression ratio safe to run on 91 octane at sea level One last question: how does one determine a camshafts opening. Twin-Cam Compression and Engine Displacement Calculator. These cams are often used for stock replacement, daily driver, and towing applications.Īs you increase the duration, you increase the peak power the engine can make. The number 1 compression calculator Calculate quick & easy via your engine code Correct piston & head gasket. Generally, cams with smaller duration numbers make peak horsepower at lower rpm. The rpm range has a lot to do with Duration. Four 4 Stroke Engine Tuning/Modification Calculator: - Camshaft/Noken as Checker/Calculator (Intake Open, Intake Close, Exhaust Open, Exhaust Close. Download the Cam Motion Dynamic Compression Calculator. Just keep in mind that the dynamic compression calculations do not take volumetric efficiency into consideration. This handy calculator is a popular reference tool for those who wish to calculate dynamic compression. Enter your desired engine parameters to figure out your Compression Ratio, Deck Height, Combustion Chamber CC, or Displacement. Cam Motion Dynamic Compression Calculator. (Note: If you click the buttons more than once, it will continue to add to the bore's value. Compression Ratio Calculator Common Pontiac Engine Displacements : (click the button for that bore and stroke for each engine) Click the following to add to the bore size. If you have questions, the best course of action is to contact the manufacturer. Engine Calculator Use this form to help you figure out your engine specs. The vavle chamfers on a cylinder bore of block, etc. There is no formula to find the rpm range for a camshaft. (considers cam timing and rod ratio) This calculator will give you the proper compression ratio with a known piston. Find it and several other helpful calculators and tools to help you determine compression ratio, gear ratio, CFM requirements, and more on Summit Racing’s Calculators and Tools page. Many factors affect this range, including: The listed range is a result of testing the camshaft on a dyno with different combinations of engine parts. This calculator is mainly for wide open throttle and based on HP peak RPM range. This Calculator will figure the duration and LSA of your camshaft using your inputs. The rpm range is determined by the camshaft manufacturer. Optimum Camshaft Duration / LSA Calculator. The basic operating rpm range for a camshaft is its "sweet spot." This range is where the engine will produce the most Torque and Horsepower.
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