cupcar

iTrader: (1)

What are detail differences between old Z 287 HP engine and the new 300 HP 2005 Track engine?

Is an update possible and or worth it?

Sorry if an old question, I tried a forum search on this topic and search engine doesn't work.

Brandon@Forged

The 35th anniversary and Track model 300hp engines are the same. I'd say it's just another reason to get a track model, if you are already planning to pay that much anyway, it just helps to entice you.

King Tut

iTrader: (1)

Yep I agree 100%. It is there to sell more track models. I don't think anyone has found out all the exact changes needed to change a 287 to a 300, but I know it isn't worth the money to do it.

Armitage

iTrader: (15)

I believe there is a slight change in exhaust cam profile, higher redline, supposedly an intake revision... thats what I've gathered so far, though I don't know 100% for sure. There may also be changes to the A/F mapping in the ECU.

It may be there to entice people to buy more Track models, but the cost of the Track models hasn't changed much since the previous years. Most of the cost difference between the Track model and other models is in the Brembo BBK and Ray's wheels anyway.

Hraesvelg

iTrader: (1)

I thought they just added variable timing to the exhaust ports. Stock pre-2005 engines has variable timing on just the intake side right?

uplz4588

diff rods also i belive...

Armitage

iTrader: (15)

Maybe thats what it was. Not cam profiles, but variable timing on both the intake and exhaust ports.

Low J.

it seems like they just leaned it out or something because it has 300hp but torque drops below the stock number to 260something.......personally I'd rather have the torque myself.......this is strictly a marketing move and not performance.

thawk408

iTrader: (16)

Awhile ago someone mentioned that this engine might be better for F/I, becuase of the stronger rod bolts and maybe even rods. Does anyone know anything about this?

cupcar

iTrader: (1)

So far all I have found is the engine has different pistons, different cams and timing on the exhaust cams is variable as well as intake.

I suspect the rod bolts (and valve springs??) are different to support the increse in rev limit to 7200 rpm.

Hopefully someone will come up with a detailed list.

Kolia

iTrader: (2)

Yet, you're falling into that same marketing trap by buying peak torque...

Peak-anything means very little.

A full dyno graph will yeld a lot more info. Even then, it won't say anything on actual drivability...

I'm getting a Track for the wheels, the brakes, the aero package (for what it's worth) and the added rpm is a bonus. I'm hoping that torque and throttle response is improved in the 4500 to 7000 rpm.

It certainly delivers more torque at high rpm (extrapolating the 287hp @ 6200 rpm to 6400 rpm give close to 296hp. 4hp short of 300. So Torque must is improved)

kzshin

Kolia is absolutely right. Besides people who tends take torque is more important than HP are usually those drag racer, or people who cares more about straight line "acceleration" performance.

The balance of the car is most important, not just single peak value.

cupcar

iTrader: (1)

Horsepower is everything, the gearbox makes the torque.

whatever

iTrader: (2)

there was an article I saw at the japanese book store last week that did a 4 page comparison of old engine vs new engine
too bad I can't understand half the thing they said.
it wasn't option, it was the other one, Carboy?

thawk408

iTrader: (16)

Somebody that knows to read japanese PLEASE HELP US OUT!!!

Low J.

here's the official specs on the anniversary edition:

Horsepower 300 @ 6400 RPM
Torque 260 @ 4800 RPM



and the stock Z:

Horsepower 287 @ 6200 RPM
Torque 274 @ 4800 RPM


so peak torque drops significantly for some some reason. If you're looking for "balance" the stock Z powerplant seems to be the better balanced of the two.

SR20DEN

iTrader: (2)

I have studied all of the ESMs to find the real answer and I haven't found it. They list the exact same cam profile for all VQ35 engines except for the '01-'04 Pathfinder. This includes the '05 G35C and the 35th Anniversary 350Z. But there is always a chance that the information was left out. The diagrams also do not show or indicate any difference in the VTC or exhaust gear.
It appears that someone will have to pysically take one apart and blueprint certain parts to determine the real differences.

The VQ40DE does have slightly more aggressive cams.

cupcar

iTrader: (1)

The stock Z engine may have the "balance" of more torque at lower rpm, allowing one to tip the throttle and accelerate without dropping down a gear.

But, I would rather have the torque up high, use the gearbox and have the extra 600 rpm to work with. To me it's just more fun that way.

I guess that is why the engine is for the "Track" model only in the first place.

King Tut

iTrader: (1)

Can't wait to get one of those. I loved driving the 2005 Frontier with it and the 6 speed manual. As for the 2005 Track, I believe the majority of the HP is in the increased rev limiter and ECU tweaks, but I hope someone finds a camshaft difference.

thawk408

iTrader: (16)

It thought it was published on nissans website that it would have slightly more aggressiver cams?