var d = 0; form.trans6.value = ""; One horsepower is equal to 745.7 watts, watts being a unit of power that James Watt also came up with, and the same unit you see everyday associated with things like light bulbs and electrical devices. form.trans7.value = ""; } } } if (form.quarter3.value) { Exclusive Content. Also these power figures were typically attained with a very unrestrictive open exhaust system, along with the lack of restrictive OE air cleaner assemblies. return formatvalue((form.height11.value - form.diameter11.value) / 2 / form.widthin11.value * 100, form.rsize); For late-model multiport fuel injection type engines (Chevy LS, Mopar Gen 3 Hemi, etc.) The L48 version of the Small Block (350 CID displacement) in the Corvette produced a measly 165 hp in 1975 and was raised to 180 hp for 1976. form.widthmm11.value = findwidthmm11(form); { } function findcfm13(form) } form.hp0.value = findhp0(form); function findet2(form) function findmph5(form) if(x==1) computeForm(input.form); It would likely use a 3200-3500 stall converter, like PN109-603, to get the best performance. form.bore9.value = ""; if (x==6) return; { The 310 horsepower rating of a 1973 Pontiac Trans Am SD 455 may seem quite dismal if you're comparing it to something like the 370 horsepower rating of the 1970 Pontiac Trans Am RAIV 400, but the actual difference in the power output of these two engines is much smaller than the 60 horsepower discrepancy indicates. function findeighth3(form) } Chevrolet Performance believes that everyone should be able to afford a high-quality GM V8 without going broke. form.rpm13.value = ""; var n4 = 0; } } } return formatvalue((form.rear8.value * form.mph8.value * 336.136 * form.trans8.value * ((1 + (form.conv8.value / 100)))) / (form.rpm8.value), form.rsize); Consequently the engine is tuned to give good low down performance and will use conservative timing and fuelling settings. { CFM. Between the lack of power-robbing accessories and restrictive exhaust systems, the advertised horsepower numbers were quite inflated when compared to today's power figures. function findmph1(form) var c = 0; Horsepower is a measure of the ability to move a certain amount of weight a certain distance, within a certain amount of time. } form.mph1.value = ""; } form.tire5.value = ""; form.rpm8.value = ""; Net horsepower was attained from engine dynos with the accessories, OE air cleaner, and factory exhaust system present on the test subject engine. if(x==7) return rounded.substring(0, rsize); { function findrpm7(form) } This tool is very accurate for displacement calculations. return formatvalue(parseFloat(form.widthmm10.value / 25.4 * form.aspect10.value / 100 * 2) + parseFloat(form.diameter10.value), form.rsize); } if(x==13) Chevy High-Performance. { Original Shows, Motorsports and Live Events. As for engine size versus exhaust size, the engine is an air pump. You can change the head ccs, deck height, overbore size, etc. Share. return formatvalue((form.rpm5.value * form.tire5.value) / (form.rear5.value * 336.136 * form.trans5.value * ((1 + (form.conv5.value / 100)))), form.rsize); form.eqratio12.value = ""; } form.rpm7.value = findrpm7(form); if(x==3) } } } A competition roller cam and valve combination may yield 95% while blowers often achieve up to 115%.) form.rpm5.value = ""; form.bore.value = ""; Engines that have been tuned for improved performance or have a stronger performance camshaft and valve combination may have up to 92%. } function findet1(form) Turnkey packages starting from $995 to $1095 to $1195. To calculate horsepower, the following equation is used: horsepower = [ (force x distance)/ (time)]/550. form.height11.value = ""; } } function findhp0(form) n3 = a * a * 12.87 * e How To. } function RoundUp(inValue) { if(x==10) for (var i = 0; i < str.length; i++) { Free Horsepower Calculator. Chevrolet Performance's 350 c.i.d. } form.et2.value = ""; form.widthmm11.value = ""; { form.mph5.value = ""; } form.rpm7.value = ""; return false; form.mph2.value = ""; return formatvalue((form.rpm6.value * form.tire6.value) / (form.mph6.value * 336.136 * form.trans6.value * ((1 + (form.conv6.value / 100)))), form.rsize); The best way to get the weight is to weigh your vehicle at the track with the driver seated inracing position. vehicle weight. } form.quarter3.value = ""; Check out our three recipes to pick up real power. form.rear4.value = ""; form.weight1.value = ""; return invalid.substring(0, rsize); If you have the actual displacement in ccs of the exact head gasket you are using, you can get an even more accurate compression calculation by using those figures. n4 = n2 + n3 + c - f Use our engine and horsepower calculators for your next engine build or maintenance. form.trans8.value = ""; { Automatic Transmissions, Torque Converters & Parts, Free Engine Piston Compression function findracecarb13(form) } form.rear6.value = ""; form.eqratio12.value = findeqratio12(form); To make horsepower numbers more accurate to what you would actually see from your engine when installed in your car, for the 1972 model year, American car manufacturers started using "net" horsepower figures. newValue = newValue * 100 form.hp1.value = ""; form.height10.value = findheight10(form); if (x==5) This, of course, is a rough estimate, and there are several complex mathematical formulas to help you discover the perfect size of pipe to use. Pre-programmed formulas for engine building and track tuning. One unit of horsepower is equal to 33,000 pounds-feet per minute. } fuel injector calculator for gasoline and e85 The following is a guideline equation for approximating fuel flow per injector based on estimates on engine Horsepower (HP) and if (x==1) CHEVY 350 350 HP MIDNIGHT BLUE CRATE ENGINE. Chevrolet Performance 350 C.I.D. form.cfm13.value = findcfm13(form); function findquarter3(form) Pricing for this engine: Basic price for 2-bolt main: $2595 . form.cyls9.value = ""; For instance, if you have a 64cc chamber and a head gasket displacement of 9.2 ccs, then in the "Head" ccs field enter "73.2". form.eighth3.value = ""; { Once youve determined your realistic horsepower and BSFC numbers, multiply them together and divide the product by six (the typical weight of a gallon of gasoline). else if(x==0) return formatvalue(Math.pow(form.hp1.value / form.weight1.value, 1/3)* 234, form.rsize); form.et2.value = findet2(form); form.rpm4.value = ""; } function computeForm(form) { { } form.effratio12.value = ""; { There are also several online calculators you can utilize, like this one. Use this compression calculator tool to figure the compression you will get with the specifications you provide. { if (strin.indexOf("e") != -1 || function findaspect11(form) var strin = "" + input; } form.aspect11.value = ""; base long block crate engines are their most popular choicebecause no one else can deliver as much performance for this kind of value. form.aspect11.value = findaspect11(form); Quality tools are an investment that will last alifetime if properly cared for. var n2 = 0; function findeffratio12(form) Chevy Engines - Stroke, Rod Length, & Rod Ratio Table Chrysler Engines - Stroke, Rod Length, & Rod Ratio Table Disclaimer: The calculators and tables provided in this section are intended for reference They use the accepted formulas used by most engine builders. function findrear6(form) The RPM entered should be the maximum RPM the engine is to run (you know that RED LINE on your tachometer). if (input.value != null && input.value.length != 0) form.strtcarb13.value = ""; return formatvalue(form.rpm13.value * form.cid13.value * .000246, form.rsize); if (num < min || max < num) { } A big part of building high performance engines, racing engines and vehicles involves math, numerous formulas, calculations and precise measuring of components to provide the absolute best performance possible. Chevy 350 Engine Specs The Chevy 350 engine is a 350 cubic inch (5.7-liter) small block V8 with a 4.00 and 3.48 inch bore and stroke. form.conv4.value = findconv4(form); A common conversion for horsepower is pounds-feet per minute. form.strtcarb13.value = findstrtcarb13(form); } var f = 0; You can use this for example to see how big your stroker engine will actually be as far as displacement, based on different bore sizes or crank strokes. { Please feel free to use these tools, bookmark this page for future use, and post links to this page for others to use. form.tire7.value = ""; form.ratio.value = "Invalid"; } { { We strongly endorse this product if you are serious about improving your vehicles performance and your success at the track. if (x==8) }, Input 1/4 mile dragstrip finish line vehicle MPH and as raced { Horsepower is an If your late-model MPFI motor has an aftermarket intake like from F.A.S.T., then choose stage 3. A high number can cause low RPM and a low number can hold back the engine resulting in performance issues. }, Engine Rear Wheel Horsepower Calculator Based on total vehicle weight and 1/4 mile MPH. return formatvalue((((form.rpm4.value * form.tire4.value) / (form.rear4.value * form.trans4.value * form.mph4.value *336))-1) * 100, form.rsize); Engine Rear Wheel Horsepower Calculator Based on total vehicle weight and 1/4 mile MPH. } return newValue; if(x==2) form.eighth3.value = findeighth3(form); form.rear5.value = ""; form.heads.value = ""; form.ratio.value = 0; At the track, see how weather and elevation will affect your times so you can instantly predict your dial-ins using current track conditions. To do so, enter in the peak wheel horsepower of the vehicle, and the vehicle weight including driver, in the form below. function computeField(input) { To run another calculation just click the clear button and start over. function findheight10(form) form.conv7.value = ""; Back in the 18th century James Watt was developing steam engines and wanted to come up with a unit of measurement that would indicate the amount of workhorses the steam engine would replace. var b = 0; { Engine & Horsepower Calculators . return formatvalue(form.weight0.value * Math.pow(form.mph0.value / 234, 3), form.rsize); form.rear6.value = findrear6(form); form.conv8.value = ""; input.value = str; return formatvalue(1353 / form.mph2.value, form.rsize); form.oldheight12.value = ""; form.ratio.value = RoundUp(n8) + ":1"; Convert fuel injector flow rate from lb/hr to cc/min or from cc/min to lb/hr using this simple calculator. var e = parseFloat(form.dt.value); } { { The 3 critical dimensions for displacement calculations are bore, stroke and number of cylinders. return formatvalue((form.rpm13.value * form.cid13.value) / 3456, form.rsize); if (strin.length <= rsize) return strin; It also has to cope with poor quality fuel and changes in altitude that can seriously affect the engines behaviour. Right now this horsepower calculator is intended for single cam engines with carburetor-style intake manifolds (this includes your aftermarket TBI setups FiTech, MSD Atomic, Holley Terminator, etc.). Xtreme Energy Cams provide increased torque, vacuum, response, and power while still providing quiet operation of the valve train and the durability required in daily driven vehicles. } } form.rpm6.value = ""; We offer base options as well as turn key GM 350 small block engines ready for an easy installation perfect for a self install in your classic car or truck. } return formatvalue((form.rear7.value * form.mph7.value * 336.136 * form.trans7.value * ((1 + (form.conv7.value / 100)))) / (form.tire7.value), form.rsize); Making big power from a recycled 350 Chevy engine is as easy 1, 2, 300 HP. The 350/290 HP Deluxe: Chevrolet Performance's most popular small block crate engine - see images, dyno specs, installation info and more. form.rear8.value = ""; if (x==9) if (x==7) return formatvalue((form.quarter3.value * .655) - .22, form.rsize + 2); To use this horsepower calculator enter the mph trap speed at the 1/4 mile mark from one of your dragstrip ET slips. return formatvalue(form.rpm13.value * form.cid13.value * .000318, form.rsize); { { var n8 = 0; if(x==5) var b = parseFloat(form.stroke.value); Quality Name Brand Parts (NOT Cheap) By 1962, a 170-horsepower version of the 283 became Chevy's base V-8, but optional small-block V-8s received a full 4.00-inch bore and a longer stroke at 3.25 inches for a { Xtreme Energy Cams bridge the gap between Magnum street cams and race only cams. It is: { newValue = inValue form.tire4.value = ""; var invalid = "**************************"; form.hp0.value = ""; For example, if you have a stock engine that makes 350 horsepower, your equation will look like this: (350HP x.5 lbs) / 6 lbs = 175 lbs/hr of fuel / 6 lbs = 29 GPH We are a premium high-performance custom small block builder and we offer horsepower from 350 up to 500 that is specific for daily driving, not racing. You are currently viewing Chevrolet.com (United States). If it's very limited use, stick with 2 1/2-inch and enjoy the sound. n6 = n5 * 16.386 / g alert(msg + " not in range [" + min + ".." + max + "]"); It covers a huge range of calculations that are important to gearheads, everything from engine compression ration calculations to rear end gear ratioand tire size affects on rpm and mph. n2 = a * a * 12.87 * d { var f = parseFloat(form.piston.value); The 350 has also been the benchmark for small block Chevy performance and is immediately associated with popular cars like the Camaro and Corvette. Then enter the total weight of your vehicle, as raced, including the drivers weight. Then enter the total weight of your vehicle, as raced, including the drivers weight. return; } return formatvalue(form.widthin11.value * 25.4, form.rsize); function clearvalue(name) { var n5 = 0; { var c = parseFloat(form.heads.value); Chevrolet Small Block Combinations - Small-Block Power From Mild to Warm to Hot--Three Recipes for Small-Block Chevy Power. { As for American carmakers, previous to the 1972 model year, the horsepower figures you typically saw in car manufacturer literature and car magazines were "gross" horsepower figures. form.disp.value = RoundUp(n5); (Not your typical STATIC compression number, if you don't know this you can calculate it. For example, if your engine has a torque of 350 foot-pounds, then the horsepower would be 333 horsepower, at 5,000 RPM. 1/15. { } form.tire8.value = findtire8(form); { form.displ9.value = finddispl9(form); } { { var n3 = 0; form.conv4.value = ""; return formatvalue(form.widthmm10.value / 25.4, form.rsize); Base Long Block Crate Engines. if (form.et2.value) if (x==13) { { form.widthin10.value = ""; The CFM needs to be balanced. function update(form, x) Building A 500hp Small-Block Chevy - 500 HP For Cheap 383 stroker assemblies built using a 4.030-inch, 350-based block with a 3.75-inch-stroke crank cost the same to build as 350 form.tire6.value = ""; One horsepower is equivalent to the amount of force needed to lift 550 lbs of weight within a period of 1 second. To enter head gasket displacement volume, in the "Gasket Thickness" field enter ".0001". if(x==8) function findmph2(form) form.trans5.value = ""; } } When you choose torque, this calculator will measure the approximate torque of an engine based on the horsepower, multiplied by 5,252 (conversion between foot-pounds and horsepower), divided by the RPM of the engine. Remember, computer-controlled multiport fuel injection does not automatically mean more peak horsepower than a well tuned carburetor setup. return formatvalue((form.newheight12.value / form.oldheight12.value) * form.origratio12.value, form.rsize); These gross horsepower figures came from engine dyno results in which the tested engine had no real-world accessories attached such as power steering pumps, smog pumps, and or A/C compressors. No computer, charts or workbooks needed. Then combine the gasket displacement ccs with the "Head" ccs. function findtire8(form) Watt would call this new unit of measurement "horsepower". } form.mph8.value = ""; Remember, these tools perform some of the most critical functions of your engine building process. name.value=""; When using the tool for engine size calculations only you can put most any reasonable numbers in the fields that are used to calculate compression ratio, but you must put something in all fields for the tool to work. Close this window to stay here or choose another country to see vehicles and services specific to your location. if (x==0) form.cfm13.value = ""; silencer ring installed in glove box, Smarty form.trans4.value = ""; The bumpstick recommended by the experts at RHS specs out at 212/218 degrees of duration at 0.050 lift with 110-degree lobe centers and 0.447/0.454 lift on the intake and exhaust.
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