911pcars

"....The boost went up by 0.1kg/cm^2 (1.42psi) due to the reduced backpressure,......."

Errr..... that might explain some of the power attributed to the new exhaust system. According to the article, Nissan engineers also leaned the A/F ratio; and they did this despite the additional boost pressure? Normally, more fuel is required with commensurate boost increase unless lightening holes are desired in the pistons. Perhaps the engineers were too sloppy and the engine was running too rich before the mod, but I don't think so.

Since when is boost pressure on a modern, ECU-equipped engine dictated by the exhaust system? Answer: It isn't. The modern ECU sets the boost limit, unless of course, Nissan or someone modifies the ECU to increase boost to produce more "cat-back" power.

Color me skeptical,
Sherwood

eclou

The physics of it tells us the car is making much more than 480 crank. The C6Z06 with 500+ crank HP and 3200lbs of weight is turning 120mph trap speeds, the 430 Scuderia with 500hp can pull the same trap but weighs "3000lbs", so it is highly unlikely that the GTR can do the same with an extra 600-800 lbs unless it is pumping out closer to 550hp

wanna911

Actually the Z06 is trapping up to 128 mph, the TT is trapping up to 122 mph, so with slightly more than 480 (like 490-500 hp), it makes very good sense that the GT-R trapped 121 at sea level in tokyo on a cold day with a dashboard timer. Similar to the conditions that the Z06's trap 127-128.

So you're right, the physics do tell the story.

Mad_AL

True if you use the numbers posted above, but I used the numbers from a different car mag, which I trust more then some random stuff on the internet.

True to that, I doubt it is going to optically appeal to the western crowd

eclou

The 997tt with 480hp and AWD traps 116-117mph. Most stock Z06's are getting low to mid 120's. 128mph is not representative of the average stock Z06. The GTRs tested to date make much more than 480hp. Perhaps they were factory tweaked beyond production levels.

A 4000# car inc driver turning an 11.7 at 122 mph needs 530hp at the crank assuming 2wd. This is about the weight of a GTR

A 3700# car inc driver turning an 11.7 at 122 mph needs 496hp at the crank assuming 2wd. This is about the weight of a 996/997tt

A 3400# car inc driver turning an 11.7 at 122 mph needs 456hp at the crank assuming 2wd. This is about the weight of a Z06.

http://www.dragtimes.com/horsepower-...calculator.php

Mikelly

This car is absolutely not making 475BHP... The numbers don't add up. And the few that have been dyno'ed are proving that. Believe what you will, but this car is probably making about 570BHP, based on 20% drivetrain loss (AWD calculation).

Mike

wanna911

I'm talking about Ideal conditions which is what the GT-R has been tested in. And several TT's have trapped over 120 mph. As several Z06's have trapped mid-high 120's. I'm not talking averages because the average driver and conditions dont permit such and are not the same as the test conditions.

The well over 4000lbs w/ driver GT 500 has trapped 118 in IDEAL conditions, compare apples to apples. A lot is being blown out of proportion because people arent looking at the details, wait until the car is tested at some altitude and you wont see and AVERAGE of 120 mph, then your numbers will come down.

eclou

ET's are typically corrected for altitude and temperature, otherwise we wouldn't be able to compare anything at all.

wanna911

Only one of the big three mags in the US corrects for conditions, everyone else posts the ET and time they got (motor trend I think, and they always have the fastest times if it's that one). If that was the case you wouldnt see a 119 for aZ06 on one mag and a 125 on another, or else somoneones conversion got all screwed up.

amaist

Note to people who don't know about Best Motoring and shows of this type from Japan.

A Japanese car can never lose a race in those videos.
I am surprised that the 997 TT did not get passed by an NSX and an Integra Type R, as well.

WWE matches have more intrigue about the outcome than those "races". But it is fun to listen to the presenters get exited about everything. Their pronunciation of English terminology is a hoot. I remember them yelling "raunch contororo" when getting an M3 CSL off the line. Now I can't take the SMG gearbox seriously anymore.

Weston

Exactly! These Japanese "tuner" shows have about as much credibility as Fox News (ie none). My previous track car was a heavily modified Integra, so I've had plenty of exposure to the "tuner scene" and these ridiculous videos, and it was immediately clear that most are total crap. Some of them are so ridiculous that I can't help but laugh... driving around with one hand on the wheel, constantly looking over at the car next to them rather than the road ahead, taking a line that I'd expect from a drunken chimp, and so on. This particular one seems better than many of the others, but considering what I've repeatedly seen before, my gut feeling is that this one was just better edited to conceal more of the sandbagging. Maybe the Skyline really is that fast, or maybe not... we wont know until someone with some credibility figures it out.

wanna911

AHAHAHAHAHAHAH

HHAHAHAHAHAH

HAHAHAHAHA
HAHA






AHAHAHAHAHAHAHAHAHAH




I almost busted a gut when I just read that

wlittleman

I have watched a few of these Best Motoring shows, and you do have to take their results with a grain of salt. I do remember watching an episode where the old guy drove the yellow 996GT3, and annihilated the field of NSX's, WRX Spec C's, Evo's, and the like... It was probably one of the more accurate 'races'.

And, I've seen an episode where a F360 gets schooled around a track by the latest model of the NSX. The drivers claimed the F360 was hard to control at limit. We all know there are many more parameters (car set up, driver, etc...) at play, and getting a quantitative analysis is nearly impossible from these kinds of shows.

These shows were entertaining back when I all I wanted to watch was a bunch of wild exaggerated driving around a closed circuit. Now, I just tune into Speed Channel and watch the best racing television has to offer...the Australian V8 Supercars!!!

akim47

my friend just got from japan where he went to the tokyo auto salon and brought back some goodies... im still a fan of the p-car, but i will admit, the GT-R is and always has been an impressive car. can we at least agree to that?

Mikelly

No, "WE" can't.... However, I've owned Zcars for two decades now. However, Nissan has a long history of skewing the facts and playing with numbers. I'll bet large sums of money that the initial results being reported eslewhere are true. The GT-R IS MAKING OVER 500WHP.

Believe what you want, but the results speak for themselves.

Mike