thawk408

iTrader: (16)

It doesnt matter if it is 2 years old or 10 years old, it is going to have the same power (mile depend). The reason why it is not as high is due to the pure fact the the 300hp motor is more poweful. I really don't see where Nissan got the 260 tq rating.

xephiron

Actually I think the 260 TQ rating with the 300 HP motor is pretty accurate, in comparison to the original engine configuration of 287/274 HP/TQ. I say this because at our dyno-blowout 2 weeks ago, there were some G35's there with both style engines. The older G35's were getting around 230 HP and 220 TQ, where the 2 newer ones (300 HP engine) got more like 240 HP and 210 TQ. RWHP of course.

Anyway, 2 350Z's there with light mods (including mine) with the "287 HP motor" were getting around 240-250 RWHP and 230-240 RWTQ. By watching those G35's, I would assume a new 350Z engine with similar mods as ours would have probably dyno'ed 255 RWHP and 225 RWTQ 'ish. Which is better? don't know, but according to posted 1/4 times I haven't seen a stock "300 HP motor" break 13's yet and I have seen a stock "287 HP motor" hit 13.6 something.

Bottom line is I doubt the difference is even noticeable on any track and I wouldn't trade in your 287 HP Z/G for a 300 HP one and expect to get better times (drag or auto-x).

It just sounds better (for sales) for Nissan to say the "new and improved 350Z/G35 now has 300 horsepower".

jr662

true, but i still think that the 300hp engine would pull better than the 287hp going into 3rd gear.

undrgnd

iTrader: (2)

There are significant inprovements in the 300hp engine which will allow it to rev higher, last longer, and be more efficient. I for one appreciate having a well designed motor as much as one with higher torque, especially when the benefits of torque over horsepower are so unclear. I am apparently in the minority here, but I do not measure my engine's worth by what rwtq it can produce or whether I gained .01 seconds in the 1/4 mile. I would have bought the 300hp engine even if it produced the exact same numbers as the 287 one, and even though it cost more, just for the benefits of the higher redline, variable exhaust cam timing, micro-polished journals, updated ECU maps, numerous block structural improvements (Nissan's words), etc...

jr662

nicely put

thawk408

iTrader: (16)

I think it is inaccurate and I have dynos to back that up.

done12many2

iTrader: (33)

In addition, I remember reading somewhere that the TQ curve on the 300 HP model is flatter and fatter than the curve on the 287 HP model.

Not saying that the 287 version is not flat because I really liked the curve my own made, but if the 300 HP version has a flatter TQ curve throughout the band, then it would be safe to say that regarless of the peak numbers, the new version produces more usable power.

I wouldn't put it passed Nissan to pull some kind of marketing stunt to sell more cars, but considering the changes they have made, I think it's safe to assume the the newer version produces a bit more power.