Sae vs std dyno calculator. I've also thrown in an Uncorrected setting.

Sae vs std dyno calculator . For this article « Previous Thread Next Thread » SAE vs STD dyno correction factor? Feb 6, 2025 · Values outside of this range may produce inaccurate results for SAE Relative Horsepower and Dyno Correction Factor, but all other calculator results (such as Density Altitude, Air Density, etc) will still be correct. It has often benn mentioned there is a 4% difference. In this ten‑minute breakdown we show why every serious Feb 19, 2009 · Gut feeling this car puts out just shy of 200 HP SAE to the wheels with a 20% drivetrainloss Fell free to look at my post on SAE vs STD on the R/T portion of this board. 23 InHg (99 kPa) of dry air and 77 F (25°C). Apr 29, 2004 · On a Dynojet, what's the difference between SAE, Standard etc. Here's why. The Standard numbers are 10 RWHP and 10 RWTQ higher. It seems punkish for a builder to post STD results. ? I was given 2 graphs on my most recent LS1 Edit, SAE and Standard. STD - but other than inflating #'s, will one method or the other give you a better tune? Open Description for sources cited and further readings!Too many dyno sheets tell only half the story. Most people know that showing STD numbers read higher but not many know why. SAE J1349, corrected to 25°C, 990mBar: K = ( (990/Pdry) x ( (Temp+273) / 298) ^ 0. Feb 13, 2013 · How many HP is gained or lost by going to STD correction on a dyno? Mine was in SAE and made a cooter hair over 45 hp with the big 3. The Dynojet software gives 4 correction options – SAE, STD, EEC and DIN. Two additional inputs into the system adjust for tire friction power loss and drivetrain efficiency (manually input). sure enough if you look at this stock dyno you will see the HP peaks twice and your dyno guys shut it off way way way to early as the second peak is much higher: Jun 7, 2011 · The standard is a SAE-calibrated engine dyno. Feb 3, 2000 · SAE -- The SAE standard applied is a modified version of the SAE J1349 standard of June 1990. Use Station Pressure reading and not the 'corrected' barometer reading. 56% Jun 19, 2007 · I don't get it. This SAE standard requires a correction for friction torque. The STD Correction Factor is most often used by Sep 13, 2011 · In fact, SAE, due to the higher and more realistic standard temperature and absolute pressure factors will normally read 4-percent lower than a dyno graph printed in STD. Since my pre-tune dyno pull was SAE, I am going by the post-tune SAE numbers. They can do this through a few different method’s, but the most common are by looking at The SAE standard says that actual mech efficiency should be used if known, but uses the "blanket" percentage in those cases where it is not. just wondering other peoples opinions on this. STD" or "incorrect"? Is it the way that the specific dyno is set up to measure hp and tq? some are set for SAE and some are set for STD? or how would what is "real" at the rear wheels change with an equation/calculator. (I'm trying to calculate this one for current San Diego weather) Right now I just compared stock vs. I'll have him email me the jpg images of the runs, I Oct 17, 2012 · Density Altitude: 1952feet Virtual Temperature: 77F Vapor Pressure: 0 inches Hg Dyno Correction Factor: 1 A car making 672RWHP STD correction would be making 645RWHP SAE. Dynojet version of STD correction does perform humidity correction based on J607 formula. Both "correct" to dry air (% humidity), 29. STD Correction - I was looking through some dyno sheets and noticed that some shops use SAE correction values on the Dynojet while other use the the STD correction values. If it's hot and humid, shouldn't the STD (uncorrected) numbers be lower? When you add the SAE correction the numbers would then reflect the dyno numbers at the conditions considered ideal by the SAE. Apr 27, 2010 · What is the difference between Dyno #'s of SAE vs STD. SAE was 186, STD was 194. J607 specification formula does not perform humidity correction. With any dyno testing there is a need for correction factors that are applied to the raw numbers the dyno actually measures. Both SAE net and SAE gross horsepower test procedures Jan 24, 2013 · A lot of people have been asking about SAE . 5 x 1. Apr 10, 2025 · The Dyno Correction Calculator adjusts engine power and torque numbers from a dynamometer (dyno) test to match standard conditions. May 13, 2011 · C6 Scan & Tune - STD vs SAE - Question on SAE vs STD. STD on the dyno - What is the difference in SAE and STD as measured on a dynamometer? Which one do you use to compare rwhp and rwt numbers with others? Thanks, Clayton from Las Vegas :flag: Feb 6, 2025 · Values outside of this range may produce inaccurate results for SAE Relative Horsepower and Dyno Correction Factor, but all other calculator results (such as Density Altitude, Air Density, etc) will still be correct. My 434. The standard atmospheric conditions for STD are: Apr 4, 2006 · Wouldnt the correction factor vary depending upon condition deviation from STD dyno location to SAE dyno location. 44% STD 10 55. Apr 7, 2007 · Yes, STD calculates about 2-3% higher than SAE. Same run but set to CF: SAE produced 414 hp and 384 ft-lbs. Jun 27, 2007 · Is there a source of actually comparing the two? Dyno in STD, and then dyno the same build in SAE. Jan 23, 2023 · How's it calculated? The Society of Automotive Engineers (SAE) created the SAE J1349 JUN90 standard method for correcting horsepower and torque readings so that they will seem as if the readings had all been taken at the same "standard" test cell where the air pressure, humidity and air temperature are held constant. The SuperFlow WinDyn software will automatically convert the dyno results to SAE and report them as CWhlTq and CWhlPw (Channel Wheel Torque / Power). this is still AMERICA! Nov 26, 2025 · A lot of people have been asking about SAE . Thank you Bobby! Mar 26, 2003 · SAE numbers are about 4% lower than STD. 3 STD Apr 12, 2005 · In aviation a "Standard Atmosphere" is 59 degrees and 29. I was just wondering what the difference is? I notice a lot of people use STD Estimate horsepower output from any engine type (4-stroke, 2-stroke, any fuel type, turbo, blower, Wankel, etc. I've also thrown in an Uncorrected setting. Feb 28, 2013 · How many HP is gained or lost by going to STD correction on a dyno? Mine was in SAE and made a cooter hair over 45 hp with the big 3. I'm really only considering temperature in my thoughts, is it from the water content in the air, or maybe Serban dynoed at the I found four Hellcats all posting results of just over 1000rwhp all using STD correction, three from the same well known shop and two of these I found the baseline dyno results and those just happen to be in SAE. This rating is measured at the flywheel, on an engine dyno, but the engine is tested with all accessories installed, including a full exhaust system, all pumps, the alternator, the starter, and emissions controls. The software adjusts for these to report flywheel torque Oct 30, 2013 · If you've ever wondered about SAE vs. I haven’t seen the STD or EEC correction formulas, but the EEC gives a very similar result to the SAE system which I usually use. The two most common standards are SAE J1349 and SAE J607 (sometimes known as “STD” on some dynos). The conditions were around 73 degrees, though, so the Uncorrected value is very close to SAE, as it should be. #travelingtall #zippersperformance #harleydavidson #motorcycle We Apr 17, 2006 · I understand the difference between 4th gear vs. So when comparing to others all factors are the same. Reply Save Like C Charlie540i Discussion starter · #3 ·Apr 12, 2005 Aug 30, 2002 · I've noticed that half of the "population" go by STD dyno readings and the othe half SAE. He showed me both SAE and STD read outs, turns out there is a slight difference in numbers. I just got my cobra with my 2. STD is what the car actually makes on that day with all the current conditions. This is the standard on which current American ratings are based. Even on otherwise identical cars. This being said, the only thing that really matters is the delta - the difference between the base pull and the tuned pull. Jul 22, 2009 · C6 Tech/Performance - Dyno Sheets - SAE vs. The SAE (or STD) corrections seek, albeit imperfectly, to bring both number under a common set of environmental conditions to permit more accurate comparisons. i go by SAE. 92" mercury. Notes: + : J607 with Humidity Correction. how my car is now: STD delta vs SAE delta and the difference was only 2whp/2wtq The only time deltas will differ greatly is when you compare uncorrected numbers vs. 98 SAE, on a friends (different dyno and region) I saw 1. C5 Tech - SAE vs. Dec 15, 2002 · STP does not equal Standard Temp and Pressure on the Superflow Dyno. vs STD Dyno numbers so I thought this would help. SAE represents more realistic standard conditions, STD artificially boosts numbers. 5 Oct 6, 2008 · It seems like most STD dyno sheets I see show higher numbers than SAE. I was just wondering what the difference is? I notice a lot of people use STD If you really want to give validity to a dyno graph, make sure that a stock vehicle’s engine output is also included and calculate the percent improvement to qualify the claim. STD numbers simply help boost the shop's ego and make you think your car makes more power than it actually does. One of our all time favorite grinds for big broad power with our big bore kits. No new mods on my car or anything. Jun 15, 2018 · The standard for 20 years have been Dyno Jets and SAE and even know they are consistant from dyno to dyno, there are some who's weather stations may be placed on more or less ventilated areas, calibrated differently etc. 5th & SAE vs. Mar 20, 2010 · C6 Scan & Tune - Differences between SAE Correction Factor & STD Correction Factor - What is (are) the difference (s) between the STD Correction Factor & the SAE Correction Factor? Does one dyno higher or lower RWHP & RWTQ #'s on a Dynojet Dyno? How about on other types of dynos? Nov 22, 2011 · Thanks to our friends at the Society of Automotive Engineers (SAE), most dyno results follow a standard procedure and almost all of them end up being "corrected" to a standard known as SAE J1349. corrected. STD settings on a dyno chart, here you go. Next time you are on the dyno insist for SAE corrected numbers. Even MM&FF go by STD correct? What is more legitimate to share w/ the public? Me personally. But the amount of mechanical loss, in my opinion, is a constant for a given engine, so using a percentage skews the readings the farther you get from the baseline atmospheric values. SAE Jul 6, 2005 · In 1972, American manufacturers phased in SAE net horsepower. How do correction factors (SAE, STD, DIN) change WHP? Dynos “correct” wheel power to a standard temperature, pressure and humidity so numbers are comparable. If you have your dyno data on disk you will be able to find the correction factors for both SAE & STD in the tabulated data. Aug 27, 2002 · I was at Mustang Magic today and asked Joe to convert my Dyno #'s from STD to SAE. 18 SAE J607, corrected to 15°C, 1013mBar: K = ( (1013/Pdry) x ( (Temp+273) / 288) ^ 0. STD on the dyno - What is the difference in SAE and STD as measured on a dynamometer? Which one do you use to compare rwhp and rwt numbers with others? Thanks, Clayton from Las Vegas :flag: Nov 11, 2005 · If you dyno’d on a 10 degrees C day at sea level, and I dyno at 35 degrees C at +3000 feet above sea level our respective conditions influence how much power we each make. Dyno: SAE vs STD CorrectionBMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Dyno: SAE vs STD Correction View Poll Results: SAE or STD Correction for Dyno SAE 8 44. The Flywheel HP estimate assumes an 11% driveline loss. 3 whipple tuned today and the #'s were 592HP & 549TQ @ 17lbs, and the tuner changed from I believe SAE to STD and the same runs #'s went to 604HP & 560TQ. Just multiply your STD results by . May 17, 2012 · A lot of people have been asking about SAE . « Previous Thread Next Thread » Dyno Correction Factor Calculator (online) The STD correction factor, used primarily in older North American dyno results, uses different atmospheric conditions compared to the SAE standard. For example, a 500 horsepower dyno on an engine that Dyno correction factors; SAE vs STD correctionWe had Bobby Wood reissue the original WM8-408 cam for M8 for us. Feb 1, 2007 · Engine dyno guys have virtually always used "Standard Correction" instead of SAE Correction as the numbers are higher with standard correction but unrealistic usually in terms of weather conditions when racing. This calculator converts your dyno run into corrected SAE, MSA and STD horsepower. 02 SAE. Can someone explain the differences in SAE vs. That explains the difference. I don't think you can convert the number from STD to SAE unless you are at the dyno. May 31, 2008 · Performance Results - STD vs SAE Dyno Numbers - Explanation Please - A dyno run on my car w/dyno set to CF: STD came up with 426 hp and 392 ft-lbs. These correction factors are used by dyno shops to correct for nonstandard temperature, barometric pressure and humidity. Why bother using up dyno time in that mode? to sell their product?????????????? truth and equality for all. May 20, 2018 · The generally accepted "Standard for Comparison" as used by virtually every professional race team and engine builder/manufacture is the SAE correction factor (SAE J1349 and J1995 are the standards and SAE J2723 is the procedure). In today's video, we discuss the difference between SAE and STD Dyno numbers, what they are, and why they make a difference. Feb 6, 2025 · The engine tuner's calculator now includes relative horsepower, air density, density altitude, virtual temperature, absolute pressure, vapor pressure, relative humidity and dyno correction factor! To use this calculator just enter the temperature, absolute pressure and vapor pressure, then click on the calculate button. Power is corrected to reference conditions of 29. When a dyno claims a 500whp output for its turbo kit upgrade but doesn’t show exactly what the stock engine does on the same dyno, there is no reference provided. Jun 17, 2007 · A friend of mine just got a Dynocom dyno at his shop, so I went by and had a go at it. Of the 4, STD gives the highest readings by far with DIN not too far behind. 18) - 0. Would someone please give me a technical explanation of why the SAE numbers are lower? I imagine it's some sort Dyno correction calculator Correct your engine's power output for different atmospheric conditions using our easy-to-use calculator. Dyno Correction Factor, calculated according to SAE J1349 AUG2004, is simply the reciprocal of the relative horsepower value. This calculator converts your dyno run into corrected SAE, MSA and STD horsepower. Convert socket, wrench, and fastener sizes from SAE to metric and metric to standard using our calculator and SAE to metric conversion chart. Dyno Correction Factors SAE vs STD Understanding Dyno Correction Factors and Their Impact on Performance Numbers When evaluating engine performance using a dynamometer (dyno), it’s essential to understand the role of dyno correction factors. From what I understand that they are conversion factors On my dyno graph, it says . for example: SAE dyno is at elevation of 1500' above sea level at 70 degrees and 29hg, 15% humidity. ). Identifying Your Correction Factor: Dynojet: Dec 7, 2010 · What is the difference in dyno results when someone says "SAE vs. Sep 22, 2018 · A chassis dynamometer, or "Dyno", is tool that calculates your car’s horsepower and torque output. Standard? Apr 24, 2013 · Values outside of this range may produce inaccurate results for SAE Relative Horsepower and Dyno Correction Factor, but all other calculator results (such as Density Altitude, Air Density, etc) will still be correct. 23" Hg air pressure, but SAE corrects to 77 degrees F and STD corrects to 60 degrees F. I'm not sure if that is the same "standard" the dyno is using, but I do know that in Florida where it is hot our Standard power on our dyno were always higher than SAE power. These correction factors are an attempt to correct for varying atmospheric conditions such as humidity, barometric pressure and air temperature. :willy: I did a little research and found a good read: There are few standards used in the dyno world Jan 24, 2004 · SAE uses a standard for temp, humidity, altitude, etc. Is there a reason that some performance shops would use STD over SAE (besides to show higher numbers) if SAE seems to be a common standard? Dec 25, 2006 · C5 Tech - SAE vs. 96 and that will put you within a couple of HP.