I'm just gonna trust you guys that the Z will go 155 (or more without the limiter). At my age, things go by pretty quickly at half that speed.

Really? My MS3 felt downright nervous and darty at 140+ mph.
I've driven a lot of fast cars, and my MS3 was not one of the more staple... err, I mean stable, of them at high speeds.

RX8 felt like it was going to go airborne at high speeds. Probably due to the lightweight wankel.

Great info as always loved the discussion topic. Its always a constant argument between me and my crew.

Hooked!

Ok.....the car IS/WAS limited to 155mph and this limit CAN BE removed with a tune. The car IS NOT drag limited to 160........I KNOW THIS FOR A FACT! I have exceeded 160 and run closer to 170 with no problem. My guess is that the car will go over 180 but I couldnt get there as i ran out of track.

I know my car is not the norm on this forum but, I doubt the "drag limited" figure of 160 even without the TT kit.

:iagree: This is correct.

how much power does your car make? i coulld barely clear 150 in a 997 gt3 at monticello. assuming you have tires in stock diameter, 5th gear redlines at roughly 160mph

My Trans Am was limited to @168mph via drag. It was a 2001 WS6 6-speed and those test numbers are from several sources as well as a very accurate electronic calculator that takes rolling and drag C/O and powerband into consideration backing them up almost spot-on.

It was a 2001 WS6.

The powerband and gearing of the 370Z along with the slipprier C/O should allow a very similar top speed.

I am taking the time to model a top-speed calculation for the 370Z using dyno-charts I have found on this site. Taken into account will be: power (torque) at every 500rpm range from a dyno graph I find here, (drive-wheel torque over the RPM band). Drivetrain ratios: gear ratios, differential ratio, and tire size. Parasitic loss from: vehicle weight, drag coefficient, frontal area and driver weight

Give me a few.

Okay, I calculated it all out. I got 168mph using the GT-R's 22.5 sq ft frontal area (couldn't find one for the 370Z, this dyno here:
http://www.the370z.com/attachments/n..._baseline2.jpg

to plot the points, and 3300# + a 175# driver.

using 500ms shift points, I calculated that this car should run 30-120mh in 16.4 seconds. Car and driver tested a 370Z to run this in 16.35 seconds. Therefor, I am of the opinion that this calculation has a VERY small margin of error that is likely smaller than the variance from car to car. Here is my data, and here is a C&D test-sheet for you to check it against:

http://www.caranddriver.com/var/ezfl...61a7a3bb51.pdf

http://i51.tinypic.com/1057cjq.png

*You will note that the whp/wtq displayed is not IDENTICAL to the graph I took it from. This is because I did not agonize over dragging the dots exactly as they were on the dyno. They are off by 1-3# of torque I am sure, as this program allows me only to drag dots, not manually input rpm/power data. However, the horsepower in my data was calculated from the torque, and only being off by a few whp, it is good enough to make me happy considering it is calculated at 5250 and the dyno I took this data from did not have an rpm/tq readout as you can see. In other words: The variance of the data is less than car to car, but I am explaining why it is there.

....Way to fab that up there...

Thanks! I just wanted to see if my 168mph guess was correct. It was closer than I thought :happydance:

Besides, this thread had gone on for 4 pages with no answer. Meh.

well you could of hop in the z car and hit the vacant stretch!

with the limiter off I'm sure a base 370z could see those speeds...it'd take forever but it make it.

350z's the limiter is 158mph

As others have mentioned its electronically limited to 155 MPH. I can also say this from experience.

An 04.5 is a 2004 model year 350Z made during the second half of the year. I think some people felt they were higher performing due to weight and higher peak torque numbers. I owned one and it was a base model with Nismo catback exhaust. Not sure what he means by "FLAWLESS". I thought mine had some flaws and was not nearly as good or as fast as my stock 2009 370Z 7AT w/ Sport Package.

Limited electronically. I was the first ECU reflashed car in the country basically and that was one of the first things changed (removed).

Now as far as what this car is actually "drag" limited to... I don't know. Even with mods and putting down 315 to the rear wheels, it takes a bit to get to 140 even. 160 sounds doable but over 170? IDK about that... Of course with forced induction that is another story.

Hmmm really. From 60mph, I feel like I can get to 140mph very quickly. My car seems to Rev up past 120mph very fast. From 0 it doesn't take too long either. I seem to reach 100mph extremely fast from 0 and then the next forty are progressively gradual. In other words I don't feel like I'm lagging to get to 140mph. Maybe its because I have a 7AT? But once I hit 140mph, then things seem to slow down a lot more.

Well this is coming from a banked straight so I guess it feels more sluggish to get to 140. Actually, let me clarify. From 120 to 140 seems to take a bit longer than I would like but I guess all told, I am covering that span in about 2 or 3 seconds and an 8th of a mile??

Haha... when I put it that way, I guess it's not so bad! :icon17:

Lol... :driving:

About drag limit. It is a little bit strange to me. Here are few facts:

Audi TT mk2 (second generation):
Drag coefficient 0.30
2.0TFSI FWD S-line - 2889 lbs curb weight - 200HP:owned:
my top speed was 280+ km/h on tachymeter (272 km/h by Garmin GPS) on long straight on Autobahn with grippy tyres, but traction control since 260 was blinking :driving:
Tyres - 245/40/18" (in S-line, basic were 225/50/16")

3.2 VR6 quattro with 3250 lbs (3262 lbs for S-tronic) curb weight - 250HP
electronically limited top speed to 250 km/h
Tyres - standard 225/44/17"

TTRS 2012 MT - 3306 lbs - 360HP
Drag coefficient 0.32
Top speed electronically limited to 250 km/h or 280 km/h (option with Carbon Air Box). BTW: 0-62 in 4.1s in 2012 version!
Tyres - 245/40/18" - Height is 10mm lower than standard TT

370Z 3232 lbs curb weight - 328 HP (in Europe)
Drag coefficient 0.29 in sport package thanks to chin spoiler and rear wing
(0.30 in BASE)
Top speed 250 km/h - why not higher without el. limiter?

LOL at the comments.

Funny how the comments quickly became a Mustang/Camero vs Z, but boy if they visit this forum, we don't give a damn, we love both cars.

Youtube is hilarious.

Anyways, I have first hand experience on this topic... the 168 mph estimate is very close.

the way the US is about cars I'm surprised its not mandated in a law somewhere that all cars be electronically limited to 100mph...

They will accomplish that goal by forcing us all to drive the Prius.

Def not drag limited, i have topped mine out at 154 according to GPS, with plenty left to go...

lol, whats also funny is reading through the comments you also find a Z on Z hater. you know, one of those die hard 07-08 HR 350Z guys that swears up and down the 350Z is better in all ways to the 370. i agree with everyone else here, i don't care what it is...as long as you are happy with what you drive then who gives a crap what others think.

The car is drag limited. It doesn't have enough power to push past 165-168mph.

The Z on Z hate always gets me... doesn't make any sense.

Especially because it's a no brainer that the 370 is vastly improved in just about every category. ;)

:bowrofl:

If memory serves me right, I hit 160 in 5th gear or early 6th gear. That's in an auto, so I still have 6th and 7th to go. Videos with minister removed shows car topping out at 173 STOCK

173 is probably possible with a tailwind. With calm wind and a flat surface you aren't getting over 170. There just isn't enough power to overcome the drag.

Not to mention it will take forever to get to that speed.

hmm interesting my auto is capable of such speeds? never knew. :icon17:

Okay I'm not sure how this is possible but I've hit 172. The only mods I had were drop in filters, a full exhaust, HFC and it was dropped quite a bit. I'm also at a very high altitude though...don't know if that has anything to do with it. I bought the car with 2k miles and it appeared stock inside and out...and I've never got a tune or removed the limiter. This makes me wonder if it was modified before I bought it.. :confused:

172 based on what? Speedometer?

FWIW HFC and CBE is a pretty big power bump... good for a couple-few mph on the top end.

Yes that was just off the speedo give or take a mph. So I don't understand, is it limited from the factory or not?

i hit 171 with a garmin for gps data. speedo said 175. it starts to get wobbly up there

fully load 2 200 lbs guys road trip cloths and a dog

Speedometer is wildly inaccurate. It could be off by 10% at high speed in some cases.

It is limited from the factory to 155 mph I believe. If you were truly going faster than 155 then yes, your car has had the limiter removed and might have a tune on it.

Are your current tires shorter than stock tire height? If they are then your speedometer is going to read faster than you are actually going... and at high speeds the margin of error is going to be even greater than when stock. So it's very possible that your 172mph indicated was under 155 actual.