It's got a limiter. When Technosquare tuned my ECU they removed the top speed limiter which obviously means there was a map in the ECU for such a thing to begin with.

The end.

If the car is "drag limited" that means there is either a deficiency in aerodynamics and or horse power. And aerodynamics goes farther than just the drag cof but I’m not going to go into that. If the car is “electronically limited” at 155mph I don’t doubt that it could reach higher speeds but the real question is how staple / safe is the car at those speeds. You have to ask yourself why the car was “electronically limited” at 155mph and the answer is probably because the car isn’t very safe beyond that speed due to aerodynamics. My MS3 is also “electronically limited” at 155mph and has a drag cof of .31 (pretty decent) It feels plenty staple at 155mph but I wouldn’t trust it much beyond that nor would I want to. Imagine getting clocked at 155+, I doubt you'll see your car again lol!

I am pretty sure that the car is computer limited to 155 because it is sold with W rated tires. I think their safety rating is right around 155 because they can't dissipate as much heat as a Z rated tire.

not saying i was driving or anything :P ...but if i could hit 152 in my 04z i think the 370z could easily break 160 (if it wasnt for a limiter)

When drag = thrust, the car can go no faster. Thrust is the reaction force of the wheel torque at the road surface. At slow speeds this force is much higher than the aerodynamic drag, so the car can accelerate. As velocity increases, the drag increases by the velocity squared.

It must of been an 04.5, as those cars are F-L-A-W-L-E-S-S

While I'd love to believe that your mazda feels stable at 155mph, the electronic limitation is more related to what tires they put on the vehicle. I believe the tires on the Z are "W" rated, so they limit it electronically to a few mph less than the rating to make sure it will handle the speed okay. Y rated tires (which you would need if removing the limiter) are a lot less common, and I'm going to assume more expensive. Not to mention no need for the average owner to take this thing beyond 160+

The sport package Bridgestones are Y rated, fwiw. Not only are Y rated tires common, they're available at very good prices. Hankook Ventus V12s are Y rated and about $220 a tire.

I have to agree that top speed worries are a bit stupid unless you're building a racecar for specific, long-straight tracks.

May be a dumb question but what's an 04.5? Lol. I was talkin bout my 04 350 enthusiast ( <3 )

Governor limited at 155

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.