Top Speeds in Different Gears (6MT)

370Zsteve · 10-21-2009, 06:04 AM

Quote:

Originally Posted by schnabdt

I just thought it would be interesting to see what the car could achieve in each gear. All of this was done at the 7500 rpm red line and not past it even though I'm sure the electronic nannies would let you squeeze out a little more if you wanted to.

1st - 40

2nd - 65

3rd - 90

4th - 115

Is it normal for the progression to be this linear? That would lead me to believe it could get 165 without a limiter. Of course all of this was and should be done in a safe and controlled environment. Also, I was impressed to see that it could nail sixty reasonably comfortably while still in second. That definitely helps it 0 - 60 times for the crowd that judges almost solely on that statistic.

Loving this thing!

Resistance from the air will flatten those numbers as speed increases in 5th and 6th. The Z has nice drag coefficient spec, nonetheless physics will take over eventually.

Anyone on the forum taken one to max velocity on the track? And isn't the limiter set at 156mph?

PeterSellers · 10-21-2009, 11:36 AM

Quote:

Originally Posted by 370Zsteve

Resistance from the air will flatten those numbers as speed increases in 5th and 6th. The Z has nice drag coefficient spec, nonetheless physics will take over eventually.

Not exactly. Air resistance does not affect a car's theoretical top speed in any gear. The top speed in any gear is only a function of engine speed, gearing and final drive (and wheel size I suppose). This is all assuming the car has the power to reach those speeds.

schnabdt · 10-21-2009, 02:30 PM

PeterSellers, that explanation sounds right to me. I have to doubt the z will do 195 as JoeD stated. Unless it's modified and a new transmission which makes this thread very unspecific.

JoeD · 10-21-2009, 02:49 PM

Quote:

Originally Posted by schnabdt

PeterSellers, that explanation sounds right to me. I have to doubt the z will do 195 as JoeD stated. Unless it's modified and a new transmission which makes this thread very unspecific.

195 MPH is the theoretically calculated top-speed based on gearing, tire-size, and the engine's redline. Not taking into account the tire's expansion at that speed, 7500 RPM in 6th-gear works out to 195 MPH.

I never said the car will get to that speed.

But a TechnoSquare re-flash with an 8100 RPM fuel-cut will get you to 210 MPH in 6th at that RPM.

JoeD · 10-21-2009, 02:40 PM

Quote:

Originally Posted by PeterSellers

Not exactly. Air resistance does not affect a car's theoretical top speed in any gear. The top speed in any gear is only a function of engine speed, gearing and final drive (and wheel size I suppose). This is all assuming the car has the power to reach those speeds.

Exactly.

kannibul · 10-21-2009, 02:41 PM

Quote:

Originally Posted by PeterSellers

Not exactly. Air resistance does not affect a car's theoretical top speed in any gear. The top speed in any gear is only a function of engine speed, gearing and final drive (and wheel size I suppose). This is all assuming the car has the power to reach those speeds.

+1, though, aerodynamics do play a HUGE part in it.

Take a Mustang GT500 and a Corvette. Mustang will throw all it's power into pushing air over what is basically a brick with wheels, vs the Corvette slipping through the air somewhat like a wing. End result, Corvette is faster.

UNKNOWN_370 · 12-11-2012, 11:23 AM

Quote:

Originally Posted by 370Zsteve

Resistance from the air will flatten those numbers as speed increases in 5th and 6th. The Z has nice drag coefficient spec, nonetheless physics will take over eventually.

Anyone on the forum taken one to max velocity on the track? And isn't the limiter set at 156mph?

155mph and the fastest I ever heard of a Z going without the limiter is 168mph. I'm Seriously guessing with this part but, the right body kit it might hit 170-172mph without a limiter?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
$5 Million Lawsuit Charges Apple With Fraud Over 3G Speeds	AK370Z	The Lounge (Off Topic)	10	01-11-2011 07:03 PM
Gears and Coffee car show - Sacramento 10/25	g37mobbin	Northern California Region	1	10-21-2009 12:56 PM
370 Z AT with Sport package and shifting speeds	casaforte9	Nissan 370Z General Discussions	5	10-13-2009 10:52 PM
Skipping Gears with SRM	MJM33067	Nissan 370Z General Discussions	9	08-16-2009 10:26 AM
Close ratio gears?	tvfreakazoid	Engine & Drivetrain	24	01-30-2009 03:44 PM

10-21-2009, 02:30 PM	#3 (permalink)
schnabdt Base Member Join Date: Apr 2009 Location: Nashville Posts: 15 Drives: 09 370 SPT TRG MB M6 Rep Power: 17	PeterSellers, that explanation sounds right to me. I have to doubt the z will do 195 as JoeD stated. Unless it's modified and a new transmission which makes this thread very unspecific.