arejohn

http://press.nissan-global.com/NEW_F...lady_z_025.jpg


Assuming you shift at red line the 300hp engine will always be 400rpm higher than the 287 during race conditions. So compare the 287 hp at any RPM with the 300hp +400rpm and the 300 always has more horsepower and should win the drags.

You race with HP and drive with torque. The daily driver advantage goes to the 287.

Then again, the few reviews I have read show the 287 to be quicker to 60mph and the 1/4 mile but not enough that it could not be induced by driver or track conditions or RPM at end of run (60mph or 1320ft.)

Maybe Nissan should have made a small adjustment to the final gear ratio so that at any road speed the 300 is 400 rpm higher.

Rampage

Horsepower may win at the end of a dragstrip or long straightaway but on a road course, it is the grunt coming out of the corners that is going to get you around the track fastest. That is why the 350Z owns the S2000 and RX8 in the showroom stock classes (T-2).

MustGoFastR

iTrader: (13)

Hmm, so what you're saying is that the 3.9 final drive on the 300hp motor would be kick ***...

zpak

Cool!

I think this is the first time I've seen the torque/hp curves for the new and old engines! Thanks, arejohn!

02MaximizedVQ

Give me the 300hp version. I'll spend more time racing 400 rpm from redline and up, than around 3-4k rpm. The 300hp version still makes PLENTY of mide range torque for the daily driver to get from point A to point B in comfort.

TomeiZ33

iTrader: (17)

What do i need to do to get my 03 up to par with the newer engine setup. Anyone know the differences???

davidv

iTrader: (2)

I cant read Japanese, but does it appear that the chart compares the manual to the automatic transmission, not the 2005Z to the 2006Z. There are 4 lines: two for the automatic (torque and horsepower, and two for the manual (torque and horsepower)? What am I missing here?

potator

I was thinking the same thing... Nothing in that chart implies that it's comparing the 287 and the 300 hp motors... I obviously can't read Japanese as well, so maybe somebody that does can help us out. And the 300hp motor isn't the "new" motor or anything, it has been available in the 05 and I think even earlier in Track models and optional on the 35th Anniversary, if I remember correctly. And please correct me if I'm wrong, isn't the 300 hp motor the same exact motor as the 287 hp one, just tuned slightly different to stretch the hp and decrease the torque? I personally like the 287 hp motor, one for having more torque in which I consider is more important with such numbers and a car as the Z, and I like the fact that it's more closely balanced with each other, instead of it being even more further stretched apart like the 300hp version.

Nano

iTrader: (1)

cams and higher redline should get you pretty close...

you will lose downlow probably

if you look at the graph... the 287 engine produces more power until 5800 rpm, not 3000 4000.

300hp engine has been available on track and 35th manual since 2005.

all automatics (2006 included) use the 287hp engine.

the fact that one engine redlines at 7000rpm and the other redlines at 6600rpm implies they are comparing the 287hp engine to the 300hp engine.

potator

I see that on the chart now, thank you. However, it seems to me that they are only testing the 300hp motor in 6MT, vs the 287hp motor in a 5AT (sport tronic or what it's called). It doesn't appear that they are testing the 300hp 6MT vs the 287hp 6MT, which is what most people would probably want to see. Anybody else?

davidv

iTrader: (2)

I got you (I think). The comparison is...

300 hp manual transmission

to a 287 hp automatic transmission.

lowrider

iTrader: (3)

"Cool!

I think this is the first time I've seen the torque/hp curves for the new and old engines! Thanks, arejohn!"


This is not the first Dyno showing the revup motor vs. the old motor. I posted this back in July:

First off my car is a 2003 "G" 6MT Coupe.

Mods:
TechnoSquare Crawford Reflash ECU
JWT PopCharger with "Z" Tube
Crawford V4 Plenum
Crawford HiFlow Cats
Crawford Headers (Aint that what this thread is about?)
Invidia G200 Dual Exhaust with "H" Pipe
Ground Wires


Well - Had some fun last night. My Speedshop, Apex Motorsports in Tucson, finished my install last night. As everyone says, it's a real tough install, but IMO, well worth it.

As luck would have it the guy who runs the Dyno at Apex, has a 2005 "G" Coupe 6MT. So here's a guy with the new 298HP engine with the new cams, exhaust timing and bottom plenum. His only mods are a K&N Filter, "Z" Tube, and Ground Wires.

It's a warm night here in Tucson, about 94F, so horsepower levels are probably a bit low. Anyway, he stuck his car on the Dyno does three runs, and he has a range of from 236 to 242 horspower. We then do a switch and add the Motordyne 3/8" Plenum Spacer. This is the first one I've seen, and it is a real stealth mod. He wants to see if it works. Does three more pulls and he gets 248 horspower for each of his runs. So yes, to put all rumors aside. I saw exactly what he did. Six runs back to back. Plenums do work on the new engine.

Now for the exciting stuff, for me! The techs are just buttoning up my up may car, and we all want to see how the old modded engine, does against his new 2005 engine. So I start up my car, sounds great BTW, and drive it on to the Dyno. The modded ECU is reset, because the battery has been disconnected for and day and a half, so it has not relearned my aggressive driving habits. He drives my car on the Dyno, 3 pulls. Results all exactly the same. HP and Torque are corrected SAE. I've attached the results My Lines are Blue, his (the 2005 with the Motordyne) is Red. We peak about the same 248HP, but I peak 7-1/2 pound feet of torque higher then him. And if you look and the curves, I beat him in all the power ranges up to about 6300 RPM, where the new plenum runners and cam take me by about 1/2HP. I was hoping for a run of 250, but what the heck. See Graph attached.

My ride home was great. Those headers, are the most significant mod I've done. I can really feel the kick in the butt. I should have done this long ago.

Lou

potator

Ditto. They're not comparing the 300hp 6MT to a 287 6MT like what most people would probably rather see.

Nano

iTrader: (1)

these are the engine ratings, the graph show power and torque outputs at the flywheel... it doesn't really matter what transmission they are tested on.

obviously if the power was measured at the wheel it would make a difference... but in this case it is absolutely irrelevant if it is manual or automatic.

BTW.. I may be wrong, but it seems they are testing the Japanese 278hp version... not our north american 287hp version. In this graph the power difference is more than 13hp(if the engines are rated properly).

TomeiZ33

iTrader: (17)

I know that the engines are the same in the older models and the newer models but i would like to know what nissan did to make the extra horsepower? Did they drop in a more aggressive cam on the newer models or the power was gained by minor changes such as ECU tuning and remapping the air/fuel??

spacemn_spiff

iTrader: (3)

+1

kovalf

The left side of the graph is power but it's in kilowatts instead of horsepower. 1 HP= about 0.7457 kilowatts (1KW = about 1.341 HP). That's why the numbers look low. Similarly the torque numbers on the right are in Newton-meters instead of pound-ft, like we're used to seeing. 1 lb-ft = about 1.356 N-m (1 N-m = about 0.7376 lb-ft). That's why the torque numbers look big. I think that Nano is right about this being a Japanese engine instead of the American 287 HP. 276 HP is about 206 KW which looks to be about where the orange line tops out. 287 HP would be about 214 KW. The power for the orange line doesn't look like it gets that high. For that matter, 300 HP should be 223.71 KW, which the red line doesn't seem to reach. The red line looks closer to 216 KW. I believe that these are the Japanese 276 HP (AT) and 290 HP (MT) engines. See this link: http://caymannetnews.com/2005/09/922...features.shtml

BTW, I'm not sure what the hell the second power units (PS) are in the article at the link.

ASTIG_Z

iTrader: (8)

Newb question...what is 3.9 Final Drive?

atar350

I will still wait for an American dyno of the cars....BTW, I have a popcharger, in this graph of it on the dyno, am I making close to the same HP of the new motor, but still have the nice 274+ TQ?

thawk408

iTrader: (16)

I have posted this before, but here it is again. Here is a dyno of an 03 track vs my 05 track. Both runs were done on the same dyno and both cars are 100% stock and both were in 5th gear. The 03 is the red line and the 05 is the blue line. For some reason there is a gap in my chart. It was not like this at the shop, but when I came home and put it into my dynojet software it messed up.
http://community.webshots.com/photo/...3976169DvphPx#