![]() ![]() IMHO it would be more effective to do the EFI first but ultimately t is your time and money. See you have crower rods but what other mods are you intending on the botton end? Yes, since you do appear to have a lot of time available how about calculating the piston speed at 7.5K with your stroked crank and comparing it to the stock one at Porsches 6.5K redline. I look forward to reading more about your progress! Waaaaaayy tooooo much! But it is fun to hear from someone excited about upgrading his car's performance. Oh, BTW, ou have tooooo much time on your hands ![]() I think the backpressure of the turbo started to choke it up, and the air temps got very hot More boost made more power, but in a diminishing pattern. My car made 250 crank BHP at 12 psi of boost, so somewhere in the upper regions of the stock figures. Posted: Thu 7:00 am Post subject: Re: Engine Modification Horsepower CalculatorĪs a point of reference, my car is astock displacement engine, but with improved intake system, and slightly better turbo. Last edited by ideola on Thu 10:17 pm edited 1 time in total this should help in the conversion process so you can plot your goals onto a map regardless of the unit of measure used on the map.Įrstwhile owner of just about every 924 variant ever made I put the flow requirements in CFM and cm3/sec because some of the maps have flow expressed as CFM and some as cm3/sec. I don't profess to be an engineer, I'm just applying some basic principles and formulas to help estimate (and that's the key word) whether my HP goals are actually achievable. It also provides flow requirements and pressure ratios, which should be useful in mapping your goals onto a compressor map to see if it will provide the boost and flow required for your application.Ĭomments and suggestions for improvements to the spreadsheet are welcome. This doesn't take into account every possible variable, but it allows you to plug in the key modifiable parameters of the engine (stroke, bore, volumetric efficiency, rpm and boost) and determine reachable BHP numbers. Now available online as a public Google Docs spreadsheet. Here is an image, along with a link to an downloadable, editable spreadsheet that you can all play with. I put together a spreadsheet to help me calculate achievable power output numbers, and thought you all might be interested in looking at the results. Posted: Thu 6:29 am Post subject: Engine Modification Horsepower Calculator Profile Log in to check your private messages Log inĩ24 FAQ (Technical) 924 Technical Section 924.org 924 RegistryĮngine Modification Horsepower Calculator Any calculations should be double checked before making any engine building and design :: View topic - Engine Modification Horsepower CalculatorįAQ Search Memberlist Usergroups Register ![]() HiPo Parts is not responsible for errors made based on the use of these calculators. The data provided is only as reliable and the inputs used. Popular Engines - Stroke, Rod Length, & Rod Ratio Tableįord Engines - Stroke, Rod Length, & Rod Ratio TableĬhevy Engines - Stroke, Rod Length, & Rod Ratio TableĬhrysler Engines - Stroke, Rod Length, & Rod Ratio Tableĭisclaimer: The calculators and tables provided in this section are intended for reference They use the accepted formulas used by most engine builders. Piston Compression (Pin) Height CalculatorĬarburetor (CFM) Requirement for Engine Calculator We have also provided some tables of common engine combinations that may help you compare and contrast different combination.Įngine Displacement, Bore/Stroke Ratio, & Rod/Stroke Ratio CalculatorĮngine Compression & Displacement Calculator To make that math easier, we have a section of calculators that do the hard part for you. Determining the parts that best suit your engine require some complex equations. ![]()
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