i bought an 04 g35 coupe recently. i am extremely happy with it but i am slightly confused. the guy selling it said it had 298 hp and it has a sport package, either way im happy with it not being sport but i have no way of telling if it is or isnt. On wikipedia it says some of the g35 coupes are 280 hp and some are 298... which one is mine... how can i tell...

thanks guys for helping me out

 

revup 6mt have the higher Hp. revups i believe started late 05-07 so more then likely you do not.

 

Your 04 coupe has 280hp. 05-06 Manuals had 298hp.

 

yup unfortunately only 280 for the '04s

 

These numbers, although official, don't tell the whole story. Here's what happened:

In 03/04 the DE was rated at 282hp and 270ft lbs of tq.

In 05 the revup received 298hp and 260ft lbs of tq. HOWEVER, the way HP was rated actually changed in 05 and many argue that there was no change in power at all. That makes sense because losing tq while gaining HP doesn't usually happen unless there's a flaw in design.

Either way, the 0-60 and 1/4mi times never changed for the coupe throughout its production, so it really is irrelevant.

But if you want to shine on the 05-07 guys, just tell them that the 04 actually is rated at more torque and torque is the actual power that you feel, not HP.

 

The horsepower readings between an MT and a AT come from different ECU mapping. The different mapping changes the power curve which results in higher HP/lower torque for the MT and vice versa for the AT.

tl,dr:
05-06-07 6mt have 298 horses

 

I understand that the engine is set up differently (different intake as well as mapping), but that doesn't mean that it makes different power necessarily. Maybe it does, maybe it doesn't. Because of the fact that the way its rated changed however, there's no way to tell really. For instance, maybe under the new rating system the 04 would have made 293 and the 05 would make 286 under the 04 system. There's no way to tell. There could really only be a 2hp difference between the two.

But regardless, the performance numbers never changed.

 

As everyone has said, since actual performance and track times never changed it doesn't matter what the horsepower on the brochure/manual/advertisement says. A dyno is just a tuning tool anyway, not a performance measurement. The real test is when you take it to the track and the time it runs.

But, Nissan didn't have a glossy brochure that stated 298hp in 2004, it said 280 back then.

 

Great Explanation...I was not aware that the performance was the same even though the horsepower was rated differently

 

If i remember correctly rev up changed the rev limit of the engine higher.
TQ > HP at early RPM to get car moving where as HP keeps the car at high speed.
Around 6500 RPM HP passes TQ before that they are reletive
that might account for the increase in HP.

I may also be completely wrong