Top speed in 4th gear

[Mowgli]

What is the top speed in 4th gear for a car on stock tires with stock gears - assuming everything is tuned, aligned, and inflated correctly?

 

[03blackCOBRA]

Something like 140

 

[Poisonous Mods]

On the Rollers i thougt i only saw 135MPH @ 7000RPM.

Sorry cant remember that well since i was watching the A/F more.

 

[Cobra10thaniv]

I thought I read in a mag was 134 at redline

 

[03DOHC]

On the rollers.

 

[lRageATMl]

that can't possibly be right...i remember going 140 in my car in the top of 4th...

 

[DD2000GT]

I shift at 135 just at redline in my car.

 

[Blade]

I thought the faster you go, the less accurate your speedo? That might explain some peeps seeing 140 and others 134, 135, etc.

 

[hssss03]

My car, stock, hit 133 on the dyno in 4th.

 

[NetworkingGuru]

It's at least 140. I bounced it off the limiter in 4th, and I remember thinking it was between 140 and 150.

 

[BALDSNAKE]

142 on along pit row Willow Springs. If fact, kept it in 4th on entire course. One torqky SOB.

 

[derryck]

I know I've hit an indicated 140 mph in 4th as well.

 

[Poisonous Mods]

Originally posted by 03DOHC
On the rollers.

Uhm folks :shrug:

Potty Tang posted a pick of the run as well. :rollseyes

U also got to put in affect the aero on our cars at that type of speed.

I know my speedo was off, so maybe some folks have more accurate speedo's vs others. :shrug:

 

[StangD281]

135 +/- 1 or 2 due to error....I've hit the limiter twice in 4th trying to max it out.

 

[BAD03SVT]

Originally posted by Poisonous Mods
On the Rollers i thougt i only saw 135MPH @ 7000RPM.

Sorry cant remember that well since i was watching the A/F more.

he said stock so i imagine he would be wanting to know about 6500 RPM considering stock limiter :shrug:

 

[mswaim]

There used to be a chart/graph floating around here that listed the top speeds for each gear. I believe it was listed as 140 mph@ 6,500 rpms on a stock setup. Might try searching, it should still be floating around somewhere.

 

[hssss03]

We just had 15 '03 Cobras dynoed a couple of weeks ago. Ranged from stock to 460rwhp. The range at the top of 4th for ALL the cars that I saw was 128mph to 134mph. And that's on the dyno, not taking into account areodynamics.

 

[03'Darin]

I did 130 at 6000 rpm's in 4th gear last week while racing a sport bike. I have been told by others that 140 is at the limiter in fourth.

 

[golfprowanabe]

Shouldn't matter on a dyno or not. Aerodynamics should have nothing to do with gear ratio.

 

[JB]

Originally posted by golfprowanabe
Shouldn't matter on a dyno or not. Aerodynamics should have nothing to do with gear ratio.

I think that's the point that hssss03 was making...