Sae j607 tuning The most commonly accepted standard is the SAE J1349. The two most common standards are SAE J1349 and SAE J607 (sometimes known as “STD” on some dynos). :willy: I did a little research and found a good read: There are few standards used in the dyno world Additional Details Publisher SAE International Published Jun 1, 1974 Product Code J607A_197406 Content Type Technical Standard Status Revised Language English Oct 24, 2024 · Earlier in this thread I commented on how fast sweep rates + Inertia added on SF dynos can deliver big numbers, so here is an example from data exported from WinDyn of a 600 RPM/SEC dyno sweep. 31 in hg, a little more realistic. Voluntary Engineering Standards William J. Dyno correction calculator Correct your engine's power output for different atmospheric conditions using our easy-to-use calculator. 234 in-Hg (99kPa) Baprace HotPass Posts: 1809 Joined: Sun Aug 06, 2006 8:57 am Location: Henrietta NY 14623 Use Station Pressure reading and not the 'corrected' barometer reading. Learn how tuning shops inflate numbers and what red flags to watch for before you pay. Whether you prefer SAE or STD correction, it’s important to know how each factor influences the results, so you can make informed decisions based on accurate, standardized data. 92 in-Hg. Aug 24, 2011 · SAE J607 was last published in the 1984 SAE handbook, of which I do not have a copy (I found the reference to the '84 Handbook in my 1994 handbook). This corrects to a more practical set of atmospheric conditions and utilizes coefficients to compensate for an 85% mechanical efficiency. 38"Hg atmospheric Re: Chassis Dyno ques by Ken_Parkman » Sat Jul 23, 2011 9:13 pm SAE J607 is corrected to 60 F and 29. 82 L (50 in3) or less in displacement and 15. Aug 3, 2011 · SAE J607 also called SAE STD, which is the classic Hotrod and Racing Engine correction factor used by most folks on an engine dyno. Sep 1, 2009 · - Is shop "A" correcting to SAE J1349 while shop "B" is correcting to SAE J607? Big numbers sell, and this is why you can see 5% or more difference from dyno shop to dyno shop on a given day, even in cases where both places are attempting to correct to the same SAE J607 standard. A lot of letters and numbers that didn't mean anything yet. It was recommended that J1349 be used instead. The purpose of this code is to prove a uniform means of comparing small gasoline engines of 0. 234 in-Hg (99kPa) Baprace HotPass Posts: 2040 Joined: Sun Aug 06, 2006 8:57 am Location: Henrietta NY 14623 Jul 20, 2021 · Event: Dyno Tune Location: Touge Tuning, Mississauga Ontario Ambient Temp: 20. Here are a few recent pictures : It hasn't run in a few (10?) years, but its been kept inside a garage, dry and out of the elements. A. This calculator converts your dyno run into corrected SAE, MSA and STD horsepower. 0634 could just barely be used. Originally Posted by rmbuilder Rob, First let me point out that no matter what correction factor (SAE J607 or J1349) you are using in your test session, the SAE clearly states that if correction factors in excess of 7% occur during the testing, the results are invalid and the input criteria must be brought to within accepted parameters. For this article, understand that these correction factors will give results that are different from each other, with SAE J1349 typically about 4% lower than SAE J607. 3 hp at 5,800 rpm. 048 for J607 for those conditions, meaning his measured HP was 358. 92 in-Hg, and 0% relative humidity (again no elevation standard)only 1°F off the ICAO standards. Real world conditions and numbers, without wind, tides wakes etc. Jan 22, 2010 · It's interesting to note that SAE J607 (commonly referred to as STD HP) has standard conditions of 60°F, 29. Browse Standards J607_198808 Current CANCELLED 1988-08-25 Small Spark Ignition Engine Test Code (Cancelled Aug 1988) J607_198808 Notes: + : J607 with Humidity Correction. 1 kW (20 hp) or less in power output. 92 in-Hg or the newer SAE J1349 standard of 77°F (25°C) day with 0% humidity and a barometric pressure of 29. 92 in Hg and dry air (zero humidity). Any suggestions to save me time trouble shooting appreciated. Also, what does ADR stand for?? Always wondered. Jun 22, 2021 · This heavily modified 2015 Subaru WRX was custom tuned by TurboTek Tuning has an ETS intake, EWG header and catless J-pipe. Along with a nostrum high pressure fuel pump and many other upgrades Apr 8, 2020 · Reelysalty said: . These correction factors are used by dyno shops to correct for nonstandard temperature, barometric pressure and humidity. Oct 5, 2012 · For an engine builder going to the dyno for the first time, the process can be intimidating, and the information gathered can be confusing. Feb 6, 2025 · Dyno Correction Factor Calculator This Correction Factor Calculator determines the dyno correction factor which is to be multiplied by the actual dyno data in order to correct for the effects of temperature, barometric pressure, humidity, and altitude. SAE J607 - Small Spark Ignition Engine Test CodeThe purpose of this code is to prove a uniform means of comparing small gasoline engines of 0. Anybody know? Print Go Up Pages1 User actions HarleyTechTalk Dyno & Tuning Zone Nov 21, 2025 · Investigation into dyno manipulation and false horsepower claims. Blue = observed, yellow = SAE J607 correction factor applied, and green = J607 + Inertia. Oct 24, 2025 · NOTE: It is recommended that you use Adobe Reader v7. It’s also worth mentioning we adhere to SAE J607 Standard of automotive engineers’ correction, so we collect repeatable numbers from day to day allowing for weather correction. You want a real argument - then we could discuss DYNOJET numbers vs the real world -and the fact that DynoJets are ridiculously high ! Jan 23, 2023 · Note: SAE J607 is an older standard which did not attempt to include any of the engine's internal friction losses. Governor characteristics are considered part of the end item specification. So, if you really want the J607, look for a copy of the 1984 handbook, perhaps in a university library. Do you have Oct 20, 2008 · I am used to, and know pretty well, the one's that are used by most automotive engine shops: SAE J607: (older method) uses corrections based on 60°F air, 29. As previously stated, test results are going to differ based on different correction factors. Some “tuning” shops will report STD numbers because they are always higher than SAE. 234 in-Hg (99kPa) Baprace HotPass Posts: 2041 Joined: Sun Aug 06, 2006 8:57 am Location: Henrietta NY 14623 Also, what does ADR stand for?? Always wondered. However, the rewards are well worth the time and money. 18 SAE J607, corrected to 15°C, 1013mBar: K = ( (1013/Pdry) x ( (Temp+273) / 288) ^ 0. These calculations are derived from SAE J1349 Revision AUG2004. Perhaps DynoJet can verify what, if any, friction/drivetrain loss factor it includes in its' motorcycle SAE CF . 234 in-Hg (99kPa) Baprace HotPass Posts: 1985 Joined: Sun Aug 06, 2006 8:57 am Location: Henrietta NY 14623 Also, what does ADR stand for?? Always wondered. This correction scheme also uses a value for friction power as part of the calculation formula. When comparing dyno results, always ensure that the numbers are corrected to the same standard. 92"Hg atmospheric pressure, and 0% humidity. The older J607 standard considers that the engine was run on a 60°F day with 0% humidity and a barometric pressure of 29. OEMs will almost always quote J1349 corrected numbers when advertising horsepower and torque. 234 in-Hg (99kPa) Baprace HotPass Posts: 1933 Joined: Sun Aug 06, 2006 8:57 am Location: Henrietta NY 14623 Also, what does ADR stand for?? Always wondered. Be sure to ask which correction factor is being used when comparing dyno numbers! Jul 22, 2009 · C6 Tech/Performance - Dyno Sheets - SAE vs. 5 HP A736008 MIN [SAE J607] Mower starts right up - runs fine for a minute then starts to miss and run rough - runs fine again for awhile just before it goes MT. Jan 1, 2021 · The ambient correction factors. E. 69 Judge is spot on with his comments on SAE J607. 234 in-Hg (99kPa) Baprace HotPass Posts: 1988 Joined: Sun Aug 06, 2006 8:57 am Location: Henrietta NY 14623 Dec 12, 2020 · Also, what does ADR stand for?? Always wondered. These standards adjust for factors such as temperature, humidity, and barometric pressure. 0703 DTS Version = 1. SAE J607 Small Spark Ignition Engine Test Code (Canceled) Translate name STANDARD published on 1. Voluntary Engineering Standards United States. The main reason we use the J607 Apr 15, 2025 · There are different versions of the SAE J607 Ford Version = 1. 8 lb-ft of torque at 4,600 rpm and 512. It's installed on a 30-inch riding lawnmower made by MTD. 92”Hg, inlet air temperature of 60 F, and for dry air (0% humidity). 234 in-Hg (99kPa) Baprace HotPass Posts: 2021 Joined: Sun Aug 06, 2006 8:57 am Location: Henrietta NY 14623 Dec 4, 2020 · Also, what does ADR stand for?? Always wondered. Jul 10, 2007 · The SAE J607 standard is what we set our dyno's to here in Australia, if we sell one in the US, it is set to SAE J1349. 5 x 1. May 20, 2018 · In fact, SAE requires that the corrections be less than ± 7%. The holes in the block that secure the muffler are stripped, so I'm currently running it without the muffler. Also the ECE standard is the same as the SAE J1349, but does not use mechanical efficiency in the Old Briggs & Stratton jae 607 flat top 8 hp was planning on building a go-kart and sticking this in it however though plans have changed it currently has the governor removed and it also has a VM 20 Jun 4, 2011 · Decals on the engine say 3600 RPM (SAE J607). 234 in-Hg (99kPa) Baprace HotPass Posts: 1977 Joined: Sun Aug 06, 2006 8:57 am Location: Henrietta NY 14623 As previously stated, test results are going to differ based on different correction factors. The engine appears clean. SAE J1349: (newer method) which uses corrections based on 77°F, 29. Handbook ,1987 NBS Special Publication ,1971 An Index of U. This has resulted in a loud backfire from either the engine or the carburetor. 92 in-Hg (101. It is not intended as a laboratory manual. Jan 20, 2024 · And yes, SAE J1349 does use humidity in calculating a correction factor. Jan 24, 2015 · Correction Factor SAE J607 This factor is commonly used by the performance industry, particularly on engine dynos. 234 in-Hg (99kPa) Baprace HotPass Posts: 2046 Joined: Sun Aug 06, 2006 8:57 am Location: Henrietta NY 14623 Dec 4, 2020 · Also, what does ADR stand for?? Always wondered. So, if you plan to compare Hotrod or Racing Engine dyno figures between various engines across the nation, you must use this correction factor in order to be on the same page with most everyone else. It subtracts corrected vapor pressure from observed barometric pressure to correct for water vapor in the air. Aug 9, 2007 · The older SAE J607 standard assumes the engine is being run where the environmental conditions are 60F, 0% humidity with a barometric pressure of 29. 93" of mercury and no correction for vapor pressure. Created Date20090908133958Z Mar 18, 2008 · 4% higher than those corrected to SAE J1349. Unfortunately, SAE J607 conditions are not very realistic. CF that day was 1. 1349 is more accurate than SAE J607 but if the Correction Factor is greater 5-6%, bets are off on accuracy of the computed HP. " Sep 13, 2011 · For you engine dyno enthusiasts, these factors should look familiar, as STD (J607) is one of the most popular correction factors available and used almost exclusively by NASCAR teams to compare The SAE J607 standard specifies a maximum ceiling of 10% power correction, on the basis that any power correction in excess of 10% will produce a power figure that cannot necessarily be reproduced by the vehicle under optimum conditions. 1005 because it is correcting by more than 10%, however the SAE J1349 factor of 1. Manufactures will frequently report J1349-corrected measurements whenever their advertising is aimed at the promotion of horsepower and torque numbers. 234 in-Hg (99kPa) Baprace HotPass Posts: 1988 Joined: Sun Aug 06, 2006 8:57 am Location: Henrietta NY 14623 Feb 25, 2019 · “Some ‘tuning’ shops will report STD [SAE J607] numbers because they are always higher than [J1349]. 234 in-Hg (99 KPa). 234 in-Hg (99kPa) Baprace HotPass Posts: 1988 Joined: Sun Aug 06, 2006 8:57 am Location: Henrietta NY 14623 Two common standards are SAE J1349 and SAE J607, also known as STD. Or have a copy of the SAE J607 standard? And, while we're at it: I seem to recall reading somewhere that Dynojet STD correction is calculated using the SAE J607 formula, but somehow adapted to account for humidity and using a different reference temperature. Two common standards are SAE J1349 and SAE J607, also known as STD. For instance, the SAE J1349 standard corrects to a 77°F day with 0% humidity and a barometric pressure of 29. Most often, the former is approximately 4% lower than the latter. This correction factor is actually SAE J607, and also referred to as “Racer Corrected. ” Simply speaking, the STP correction factor takes the ambient conditions and corrects the observed data to 60° F, a barometric pressure of 29. May 26, 2009 · are different from each other, with SAE J1349 typically about 4% lower than SAE J607. 8 C Elevation: 249ft Car: 10gen Honda Civic Si Tuner: Ray from TurboTek Dyno Info: Mainline Prohub Transmission: 6 Apr 6, 2020 · Corrected to SAE J607 and running on 91-octane pump gas, on the engine dyno at the flywheel the 393 developed 500. 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. This is standard practice with OEM manufacturers. Consequently, J607 gives higher values, which fail to include the friction losses. Whereas the newer SAE J1349 standard is 77F with 0% humidity and a barometric pressure of 29. Customer: I have an engine that is approximately 30 years old, specifically a Briggs & Stratton 4 cycle with 319cc and 8hp at 3600rpm. Jul 30, 2019 · Such is not a part of J607 or J607+ which further separates so-called "STD" and SAE power curves and numbers. 1988 Oct 22, 2019 · PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > What year did Pontiac go from Fly wheel HP to rear wheel HP Apr 4, 2006 · The most common are the SAE standards. Types of Dyno Correction Factors The most common correction standards include the SAE J607 (STD), SAE J1349, ECE, DIN, and JIS. The application of SAE J607 is for WOT testing and data is corrected to the standard conditions of a barometric pressure of 29. Assuming that the Barometric pressure listed above is corrected I get a CF of 1. S. The SAE J1349 Standard is a newer standard than the SAE J607 Standard, and the J607 standard is one of the more generous standards, while the J1349 standard is one of the less generous standards (close to 4% difference between . 18) - 0. Feb 9, 2012 · Engineers have long recognised these discrepancies and thus 'correction factors' are applied to raw dyno data, the most common being SAE J1349 and SAE J607, which take into account factors such as humidity, barometric pressure and air temperature. Dec 25, 2006 · Standard (J607) will report higher numbers than SAE (J1349 ). Air density is affected by the temperature, pressure and humidity of the air May 2, 2010 · SAE J607 also called SAE STD, which is the classic Hotrod and Racing Engine correction factor used by most folks on an engine dyno. Author Topic: The ambient correction factors. Dynojet version of STD correction does perform humidity correction based on J607 formula. Its got a little bit of surface rust here and there, but it doesn't appear to have any serious rust damage. Please note temperature is converted Rankine This correction factor is actually SAE J607, and also referred to as “Racer Corrected. In fact, dyno time is such a valuable asset to your engine program that it should be regarded with the same enthusiasm and preparation as a trip to the racetrack. Slattery,1971 An Index of U. 5 Additional Details Publisher SAE International Published Aug 25, 1988 Product Code J607_198808 Content Type Technical Standard Status Canceled Language English Collapse Revisions Panel Dec 4, 2020 · Also, what does ADR stand for?? Always wondered. 92 in hg and SAE J1349 (June 1990) is corrected to 77 F and 29. So in the example above we would not be allowed to use the STD or standard J607 SAE factor of 1. Sae J607 Manual: S. 3kPa) SAE J1349 (ECE and JIS is same) 77°F (25C) 0% humidity barometric pressure of 29. 8. Be sure to ask which correction factor is being used when comparing dyno numbers!” Also, what does ADR stand for?? Always wondered. Notes: + : J607 with Humidity Correction. when a manufacturer says the engine produces a maximum of 300bhp, are there any SAE standards that say it was measured at certain temperature and altitudes? Aug 23, 2015 · Briggs & Stratton 3. R This correction factor is actually SAE J607, and also referred to as “Racer Corrected. National Bureau of Standards,1971 Index of Specifications and Standards , Power Farming in Australia and New Zealand Technical Manual ,1982 An Index of State Specifications and Standards « Previous Thread Next Thread » Dyno Correction Factor Calculator (online) Small Spark Ignition Engine Test Code (Cancelled Aug 1988) J607_198808 - 1988-08-25 This correction factor is actually SAE J607, and also referred to as “Racer Corrected. The SAE J607 standard specifies a maximum ceiling of 10% power correction, on the basis that any power correction in excess of 10% will produce a power figure that cannot necessarily be reproduced by the vehicle under optimum conditions. Jul 10, 2007 · The SAE J607 standard is what we set our dyno’s to here in Australia, if we sell one in the US, it is set to SAE J1349. SAE J1349, corrected to 25°C, 990mBar: K = ( (990/Pdry) x ( (Temp+273) / 298) ^ 0. 234 in-Hg (99kPa) Baprace HotPass Posts: 1988 Joined: Sun Aug 06, 2006 8:57 am Location: Henrietta NY 14623 Dec 4, 2020 · Also, what does ADR stand for?? Always wondered. It corrects observed data to STP, or 60 degrees F at a barometric pressure of 29. Jun 1, 2011 · On the eddy current dyno, they used a correction factor SAE J1995, the Dynojet used SAE J1349, and the SF901 used the SAE J607. 234 in-Hg. The AirMouse even measures grains of water per pound of dry air. The SAE J1349 Standard is a newer standard than the SAE J607 Standard, and the J607 standard is one of the more generous standards, while the J1349 standard is one of the less generous standards (close to 4% difference between the 2). This SAE standard provides guidelines for testing small spark-ignition engines to ensure performance and reliability. The two most common standards are SAE J1349 and SAE J607 (sometimes known as “STD” on some dynos). J607 specification formula does not perform humidity correction. . SAE J607 – Small Spark Ignition Engine Test Code The purpose of this code is to prove a uniform means of comparing small gasoline engines of 0. Dec 4, 2020 · Also, what does ADR stand for?? Always wondered. 05825 This correction factor is actually SAE J607, and also referred to as “Racer Corrected. Oct 7, 2013 · Nice upgrade, would be interested in seeing your dyno sheet, what correction factor ? ( SAE J607 or SAE J1349 ) . Jun 22, 2018 · The module measures ambient air density mass, ambient air density percentage, ambient air pressure, ambient air temperature, density altitude, pressure altitude, relative humidity, absolute humidity, and offers SAE J607 and SAE J1349 correction factors. (Read 35368 times) The two most common standards are SAE J1349 and SAE J607 (sometimes known as “STD” on some dynos). Apr 15, 2022 · Event: Dyno Tune Location: Touge Tuning, Mississauga Ontario Elevation: 249ft Car: 2013 Subaru WRX STi Tuner: TurboTek Dyno Info: Mainline Prohub Transmission: 6-speed Gear: 4th Peak HP at RPM This correction factor is actually SAE J607, and also referred to as “Racer Corrected. 0 or higher for optimal download performance; older versions should continue to work, but downloading large files may appear to take longer, so please be patient in those cases. 068. 234 in-Hg (99kPa) Baprace HotPass Posts: 2045 Joined: Sun Aug 06, 2006 8:57 am Location: Henrietta NY 14623 Also, what does ADR stand for?? Always wondered. STD is SAE J607 (DIN is the same) 60°F (20C) 0% humidity barometric pressure of 29. Replaced with J1349 Product Details Published: 08/25 The two most common standards are SAE J1349 and SAE J607 (sometimes known as “STD” on some dynos). “All runs were on 91-octane unleaded "California" pump premium gas, corrected using the SAE J607 performance-industry standard factor (roughly equivalent to the old-school muscle car "gross horsepower" rating method, it generates numbers roughly 4-percent higher than SAE J1349 net hp, the rating method in use for late-mode” May 9, 2017 · 2017 ZL1 Bone Stock Dyno Runs Anyone? ZL1 Discussions This correction factor is actually SAE J607, and also referred to as “Racer Corrected. zgft kegi kmrfod ozaojp jtkyaql asiwvgp tiqu gluwm dseq zqxga nxfbel lgre lvcgulz hbz gfptot