28,500 lbs Ford vs Ram 1 ton DRW

Huntindog wrote:

No it is NOT false.
J1995 is a specified procedure for testing. It is actually an old procedure. It has been replaced by most with J1349. This is a more stringent procedure, BUT their were loopholes that too many were using to get misleading (higher) numbers. So it was updated in 2005. Realizing that some manufacturers could still find ways to manipulate the numbers, SAE came out with a new process at that time. J2723. It can go hand in hand with J1349.
What it specifies is that SAE must be present and oversee the testing to keep it legit. Only those that do this voluntary extra step can advertise their SAE numbers as "certified".

Check out what I posted earlier in this thread:

SAE certified power ratings

Hmmm, who to believe here. A biased fanboy who has never worked for an engine manufacturer and only wants to make hi favorite brand look good or someone who is unbiased here that has worked many years for an engine manufacturer and only want to give people the facts.

Or we can just believe the very people that set the certification standards.

Engine Power Test Code - Spark Ignition and Compression Ignition - Gross Power and Torque Rating J1995_201401

"This SAE Standard has been adopted to provide a basis for dynamometer determination of gross engine power and torque under reference conditions. It is intended for use primarily by engine manufacturers who supply engines for installation by others in applications where the engine manufacturer may not control the induction and exhaust system design or the speed at which the engine is run"


What do they say about the J2723 that GM uses you ask?

Engine Power Test Code - Engine Power and Torque Certification J2723_201509

"This document specifies the procedure to be used for a manufacturer to certify the net power and torque rating of a production engine according to SAE J1349 (Rev. 8/04) or the gross engine power of a production engine according to SAE J1995.

Manufacturers who advertise their engine power and torque ratings as Certified to SAE J1349 or SAE J1995 shall follow this procedure. Certification of engine power and torque to SAE J1349 or SAE J1995 is voluntary, however, this power certification process is mandatory for those advertising power ratings as “Certified to SAE J1349” or “Certified to SAE J1995.”"

All three are certified standards per SAE with the J2327 being the newest with the main difference being that it requires one of these SAE-Approved Witnesses to witness the dyno testing so that SAE can get more money from the manufacturers to use certification logo. That does not mean that they are not certifications. It only means that in order to advertise the "Certified to J----", you have to pay for the witness. That is all.