it produces more torque at peak power, 200rpm later.. which says a lot again. the 287hp engine produces hp FASTER up 6200+rpm(again, not 4500rpm). at respective peak HP, the two engine put out almost exact same torque... (saying the 300hp has more torque is rediculous)


the fact the 300hp is inconclusively faster(and in some reviews, even slower) in ALL performance tests speaks for the difference.

Seriously, what engine would you pick? 300hp at 6200rpm or 300hp at 6400rpm? That is what a few mods will do (BTW, the 300hp engine is just a modified 287hp engine, nothing more... seems to me the placebo of 13hp 200rpm later is huge).

the 300hp engine is better no doubt(and in equally modded engines, it will always be ahead), but a) the difference is marginal at best b) stock vs stock, it will be faster if you can constantly stay above 6200rpm. Everytime you dip bellow 6200rpm the 287hp engine is faster (at 4800rpm it produces 13hp MORE than the 300hp engine at same RPM, so YEAH, peak torque makes a difference too).

Why do you think the 287hp engine stayed on the auto tranny models? Longer final drive demands more mid-rpm power, as when you shift you lose more RPM. I bet if they had used the 300hp engine on autos, the car would actually have been SLOWER. Just like peak torque doesn't tell the whole story, peak HP doesn't tell the whole story either(and that is why you need a shorter FD , you trully need to stay in higher RPM constantly, that's what less torque does for you)

 

Nano caro...

The 300hp engine produce more torque at it peak rpm than the 287hp engine at it lower rpm. Use maths, divide the power by rpm.

The 300hp's torque curve is flatter, staying up past it's peak torque.

I remind you that I have both a '04 Performance and a '05 Track in my driveway. And the difference is quite noticeable.

 

Ma cher Kolia, what you are saying doesn't make sense... peak torque is at 4800rpm for both engines, and peak power comes sooner for the 287hp engine than the 300hp engine. At 4800rpm, the 287hp engine produces 13 more HP than the 300hp engine(math, plug in the numbers)... at what RPM do you thin the 300hp engine torque catches up and the engine starts producing more HP? Before you answer, consider this...

at 6200rpm the 287hp engine produces 243 ft/lbs of torque
at 6400rpm the 300hp engine produces 246 ft/lbs of torque

if you think the 300hp engine produces more than 243 ft/lbs of torque at 6200rpm you live in dreamland. (as flat as it may be, it is not that flat).
you fail to understand power comes sooner on the 287hp engine! It produces torque FASTER. If the 2 car should race shifting at 6200rpm, the 287hp engine will always win. (the torque curve of the 300hp engine is flatter AFTER that! Not the 4500rpm you keep claiming...)

I test drove a 35th anniversary and a G35 coupe with rev-up, and I wasn't impressed, I honestly couldn't tell the difference and was dissapointed. I URGE anyone who consider changing car for the HP difference to go test drive one...

 

hehe

Why would I shift at 6200rpm if I can keep the lower gear until I reach 7000rpm ? Again, it's area under the curve that counts, and high rpm torque for road circuit application (like we both do).

As for the torque curve, I see two engines with same rpm peak torque, one loosing torque faster than the other. On a road circuit, the gear box can be used to keep the engine running between the peak torque rpm and the red line, nullifying any mid rev advantage, since we spend very little time there.

It's spliting hair I know. But there wouldn't be any fun otherwise

 

Well, there you got it! The rev-up clear advantage goes from 6400 to 7000rpm(not 4500, damn joo!), mainly for the little extra power and larger powerband (ability to produce more torque longer up there thanks to vvt). On the track it's a clear benefit, on the street it just a placebo (just look how many people swear by the MREV)

Unfortunately, you can't stay above 6200rpm forever, even if you are able to shift at redline everytime, 2-3 has a 2000rpm drop, 3-4 and 4-5 has a 1500rpm drop ... that puts you at 5000 - 5500rpm, where the 287hp engine is stronger .

Of course

 

I want my Pocket Coffees!

 

Its' my turn to compare, Now that the math lessons are over Let me share my experience...........lol i have owned both engines an enthusiast 05 and a 06 base....compared to the 05 the 06 feels stronger in 2nd.... also i notice there is a stronger wider stance because nissan put 245 rears on the back of the 06 models compared to 235.. i felt the 287 had noticeable TQ in 1st gear than the REV-up, but the 300hp rev-up feels the same otherwise...btw the tranny in my 06 shakes just like it did in my 05 except the shifts from 1st to 2nd are smoother.....u dem Z's Now, if you race these 2 cars it could go either way, drivers race written all over it...I can see the 287 pulling and the Rev-up slightly edging it out by half a car....... or then again i have never done this, and i love both the 287 and 300

 

I'm starting to not take your posts seriously...

How does the 287hp models have less weight? Its the same exact car, just a different engine. Adding 13hp didn't make the cars heavier.

Granted, the 06's are heavier than the '03-05's, but thats across the board, not just the manual's with the 300hp engine. It also includes the 287hp auto's.

You'd take HP over TQ? HP sells cars, TQ wins races.

 

I had my gf drive my Z with the 300hp Rev-up (she has an 03 Touring 6-speed) and even with her car modded, she said mine felt faster.

 

That's an important point. The 06 MY's are heavier, not the different engine.

And FWIW, I've found that everyone with the 287hp likes the torque more than the 300hp. And everyone with the 300hp likes the hp more than the 287hp.
Neither side will convince the other that one is better.

 

The '05 Tracks are still the best of them all !

Lighter AND with 300hp... Mouwahaha

 

I care, why?

Did I say the car is heaver BECAUSE they added 13hp? Give me a break. Things tend to get heavier when you keep adding to it.

And that's why they're the slowest of all. Worst hp:weight ratio. I'm sure anyone buying an auto doesn't care about that though.

Uh. I'm sorry, but you are mistaken. You need to go back to physics and learn the difference between horspower and torque. HP:weight wins races. Take an F1 car for instance, they don't even make 300ft-lbs of torque. Tell me a mustang GT is going to blow it away in a straight line because it has more torque!!

 

The bottom line is really... the difference is so marginal, its stupid to compare it really. Its a driver's race either way.

 

I was hoping you would recant before signing off, or at least entertain everyone and try to dig yourself out of the hole you dug by saying something so silly(after trying to insult my intelligence, nonetheless).

Oh well, maybe later??

 

And the lightest rims. Score one more for the '05 Track!

 

I didn't realize the '05 track was so light. Albeit it's not the lightest of all stock Z's, but that's the best lbs:hp ratio I've seen from a stock Z.... right @ 10.75 and yeah the lighter rims would have a twofold effect. Less weight to push forward and less rotational weight to spin. Not bad at all.

 

This is why it's the only Z with two stars when running in TT with NASA...

 

from what ive read the intake cams were set up with the vvt but not exhaust for the 03-05, and now they have vvt on the i/e cams

 

actually, so is the 2005 35th edition(automatic included )... which has the lowest HP/weight ratio of all models.

all 350z are still in same class, 287hp just get the right to a few more mods.

 

300s for everyone