You can return any new or unused item within 90 days of the date your item was shipped and we will refund the full purchase price. Visa/Mastercard, Discover, American Express, Pay Pal, and Pay Pal Credit, Gift Cards, Summit Racing SpeedCard. Have questions? Our customer support team is available 7 days a week to help you. We’ll beat any advertised price on an in-stock product. Why, they are virtually always running a larger camshaft, go faster and of course can. We're confident our prices are the lowest. I for one, certainly have no quarrel with compression Ratio rules. Over 1 Million parts from more than 1000 trusted brands, more parts added all the time. We ship in-stock parts via ground shipping the same day if ordered by 8:00 pm EST. Just place an order over $109, and we'll drop the shipping and handling charge. lift.Ģ.) If opening the intake Atdc or closing the exhaust Btdc, enter as a negative (-) number. Instructions: Enter a value in the un-shaded boxes below as they pertain to your engine.
Camshaft compression calculator how to#
For a step-by-step guide to choosing individual events, watch How a 4-Stroke Engine’s Piston Motion and Valve Events Interact.įor a written guide on choosing a cam from the Summit website using the calculator's outputs, read How To Purchase The Perfect Cam.ġ.) For accuracy in comparisons, always use figures measured. To learn how to use the calculator and find a cam based on results, watch How the Summit Racing Cam timing Calculator Works. This calculator is supplied as a convenience and intended to be used for estimates only. This calculator is mainly for wide open throttle and based on HP peak RPM range. Leave at 0.000 to use default values OR change any value to override default. This Calculator will figure the duration and LSA of your camshaft using your inputs. In the lower area, enter individual events to generate the cam's required Intake and Exhaust Duration, Centerlines, Lobe Separation and Advance numbers. Use for custom configuration or oversize bore. In the middle area, change the centerlines and see what it does to the individual events and the resulting Lobe Separation and Advance. In the upper area, calculate individual valve events and lobe centerlines by entering Intake and Exhaust Duration, Lobe Separation and Advance. General rule of thumb for acceptable dynamic compression ratio to run safely on pump gas is 8:1 maximum for engines with cast iron cylinder heads and 8.5:1 with aluminum cylinder heads.This calculator will help you rapidly determine the perfect camshaft for your application. However, that same 11:1 static compression ratio engine with the radical 259/269 duration camshaft would have a dynamic compression ratio in the neighborhood of 7.5:1, totally acceptable to run on pump gas. Therefore with the mild cam it will have a high dynamic compression ratio, probably 9.5:1+ which would be way too high to run safely on 91 octane gas.
If you put a very mild camshaft (194/204 duration this cam will have an "early" IVC (intake valve closing point), and will "bleed off" less compression than a radical camshaft with 259/269 duration and a considerably "later" IVC. A longer duration camshaft will allow you to use higher mechanical compression ratio pistons because it lowers the effective compression ratio by keeping one or. Compression Ratio, Dynamic Compression Ratio takes into account camshaft. To give an example, lets say you're considering only pump gas for your engine, and it has a static compression ratio of 11:1. This calculator will calculate both the static and dynamic compression ratios. Enter your desired engine parameters to figure out your Compression Ratio, Deck Height, Combustion. Unlike Static Compression Ratio, Dynamic Compression Ratio takes into account camshaft timing by considering the intake valve closing point in relation to the piston position. Use this form to help you figure out your engine specs. Enter the measurement designation in either inches, 1, or millimeters, 2. Static Compression Ratio numbers are the ones you hear thrown around the most ("10:1 compression"), and it takes into consideration the full sweep volume of the cylinder in regard to its range of crankshaft stroke. Engine Compression Ratio (CR) Calculator This calculator requires the use of Javascript enabled and capable browsers. This calculator will calculate both Static and Dynamic compression ratioĬompression Ratio is the ratio of an engine's cylinder volume vs.
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