Now, why did Lexus went down on hp for the 2006 model?

With a four-cam, 24-valve V6 engine with 223 horsepower at 5,600 rpm and 238 pound-feet of torque at 3,600 rpm. It doesn't make any sense..................

The 2005 model has 230hp and 242lb. torque.....

 

They decided to use a more accurate method to determine hp.

 

The new SAE method, J2723, requires a third-party certification, in which a witness is present throughout the ENTIRE testing procedure preventing HP/Torque numbers from being played with.
The old SAE standard does not. What automakers do is to pull x engines from the production line and average the test results to get a number, and guess which engines they pull.
More importantly, which engines they are selling to you
Don't believe me? Read this article Inflated HP

 

So, the 2005 model 230hp/242lb. torque is NOT the actual number since it was not certify by a third party?? What gives?? So, i'm driving a car that might not even have 230HP?

 

I posted this in the 2nd Gen New IS section:

https://www.clublexus.com/forums/sho...d.php?t=175604

 

as flip posted, it has nothing to do with inflated numbers or third party testing. Method of testing was changed and all manufacturers will have to update their ratings. Engine itself is the same. 7hp drop is pretty low compared to some other engines, and this is because it was tested with 91 octane gas (Toyota decided to test their cars with 87 which decreased the hp ratings more)...

 

Here is a direct quote from New SAE Standard J2723

"That's where the voluntary test, certified by a qualified witnessing party, assures the testing process subscribes to provisions of the new J1349 standard, says Lancaster. The voluntary certification test - SAE standard J2723 - was finalized March 31. It closely mirrors the ISO 1585 process auto makers undergo to certify engines under Europe's homologation rules"

"In some past cases, manufacturers have taken advantage of J1349's loopholes to generate horsepower ratings that only could be achieved under the rarefied conditions of an ideal testing environment - but were unlikely to be replicated in the real world"

I understand we don't want to believe that we bought products that are not as advertised, but testing with 91 while recommendating 87-91 is itself misleading, I will let you decide whether this is intentional or not. To be fair, kudo to Toyota to implement this voluntary SAE standard (well partially), but that does not change the fact that unrealistic ratings are achieved on these engines. Those numbers were promised to you and me when we bought our cars. For Camry V6, that is more than 10% drop from 2005 to 2006 for the same engine?

Also see this link of Toyota has NOT adopted third party certification No Value in 3rd Party Certification

"A spokeswoman for Toyota said that most of its engines have already been retested using the new standard and that eventually all will be. But she said Toyota was still considering the third-party verification.

A spokeswoman for Ford said the automaker is using the new test standards but sees no "value" in third-party verification. "

 

huh? First of all, Toyota reccomends 87 and tests with 87 while Lexus reccomends 91 and tests with 91. Lexus always has stated that using lower octane fuel will decrease performance.
You can drive it with 87 but you wont get the same hp. No other manufacturer with new SAE ratings has actually published with what octane fuel was it tested with, except for Toyota and Lexus.

New SAE is an different test, which is why ratings are different. For example - use of AC is mandatory now, which explains the drop in HP as well.

You were never promised 230hp under new SAE ratings, you were promised 230HP under old ratings. That does not mean everyone cheated on old ratings, just that actual requirements were different.

New IS350 in Japan has 322hp... but that HP rating is tested differently and is in actuallity the same as 306hp in US. All depends on the testing procedure itself.

 

Lexus 04 RX330 User Manual recommends using 87 octane rating fuel and above. Not 91. Read your UM

 

Lexus always stated that best performance was with 91 octane.... you can find this everywhere. It is common sense...

 

Let me rephrase and make the point clear: HP rating is achieved with higher octane but this fact is not revealed to end consumers when Lexus is selling cars with boosted HP ratings. This and other questionable sales/testing tactics are what SAE Standard J2723 trying to eliminate in order to protect buyers.
I am taking back my kudo to Toyota for voluntarilly implement J2723. "Toyota had to advertise based on the new SAE testing procedures because of a California state law, said company spokesman Bill Kwong. The company then decided to use one set of ratings for all of its U.S. ads. " sounds like a Lexus marketing decision to respond to California law.