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Top Speed

cb4017

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Briefly saw 106 by GPS. It got up there a lot faster than I would have expected.

Did 125 once in my Crown Vic PI and it was about tapped out. The light bar probably held it back a little.



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Racket

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Okay! Let the fines lay as they fall!

I have driven the truck a bit over 125 MPH! It was still pulling, but I ran out of road! This, with the governor disabled, decent fuel (91 octane), and 67° outside air temperature. But...

If any of you decide to do this, make sure you've done a bit of suspension stiffening.
Not totally sure about default rear sway bars but I would agree suspension - not just dampening but lift/rake should be a big caution. Tires, alignment and pressure would need to be damn near perfect and the road straight, level and clear.

Having said that - and having the speed limiter switched off - I confess when the opportunity presented itself I did an impromptu 'test' and once I saw the speedo getting into the 120-ish range I got off the gas. The power was there, I couldn't be confident of aerodynamic stability, suspension reaction or sufficient braking at that point.

Trucks inherently aren't designed to be consistently driven this way unless a lot of specific engineering is put in.

Even though it was super easy to reach that speed I'd caution against it and likely won't attempt it again unless some extreme event 'required' it.

If I were to build a purpose-driven top speed truck (which doesn't make sense to me) it would involve a lot of serious modifications like what Doc is doing.
 

Doc

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Not totally sure about default rear sway bars but I would agree suspension - not just dampening but lift/rake should be a big caution. Tires, alignment and pressure would need to be damn near perfect and the road straight, level and clear.

Having said that - and having the speed limiter switched off - I confess when the opportunity presented itself I did an impromptu 'test' and once I saw the speedo getting into the 120-ish range I got off the gas. The power was there, I couldn't be confident of aerodynamic stability, suspension reaction or sufficient braking at that point.

Trucks inherently aren't designed to be consistently driven this way unless a lot of specific engineering is put in.

Even though it was super easy to reach that speed I'd caution against it and likely won't attempt it again unless some extreme event 'required' it.

If I were to build a purpose-driven top speed truck (which doesn't make sense to me) it would involve a lot of serious modifications like what Doc is doing.
Yeah, before the mod, I took it to 122 , it felt squirrelly and very tippy.. problem solved ..
Regards
Doc
 

Pinepig

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My question is, where can you drive at a sustained 100+ here in the USA? If you say race track, you'd already know how to defeat the governor. Which, by the way, is easier than most folks realize. And...

I've seen 127 on the dyno a couple of times, but mine has Ford's Performance Tune with a few tweaks. Do I drive that fast? Heck no, as I have a few (smart) brain cells left.
Black Rock dry lake bed, I had mine right near 110 for about 20 minutes here. No wonder I only averaged 17mpg for that tank.

rlNpHur.jpg
 

rangerdanger19

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Hey, Addison, please let us know what you think of the Geolanders once you have them on. I am still running the stock Hankook ATM tires but am looking to upgrade soon....
Finally got the Geolander G015s installed! First impressions are pretty good. Wet surface tractions is outstanding compared to the OEM Bridgestones, but launching them on cold roads hasn't proven all that great. It could just be that I haven't properly broken them in.

There were a couple options for the G015s in terms of load ratings. I went for the reinforced 114s since I often load the bed heavy and tow our cars around, but unloaded, they are pretty firm which does cause a bit rougher ride than I'd like for such meaty tires. You win some, you lose some.

No noticeable difference in road noise or cornering performance.

I haven't tested them at high speed yet, trying to break them in a bit more, but I'll let you know how it goes!
 

RANGER_MARC

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Finally got the Geolander G015s installed! First impressions are pretty good. Wet surface tractions is outstanding compared to the OEM Bridgestones, but launching them on cold roads hasn't proven all that great. It could just be that I haven't properly broken them in.

There were a couple options for the G015s in terms of load ratings. I went for the reinforced 114s since I often load the bed heavy and tow our cars around, but unloaded, they are pretty firm which does cause a bit rougher ride than I'd like for such meaty tires. You win some, you lose some.

No noticeable difference in road noise or cornering performance.

I haven't tested them at high speed yet, trying to break them in a bit more, but I'll let you know how it goes!
Hey, Addison, thanks for the update! In the meantime, I switched the stock Hankook tires out for Falken Wildpeak AT3Ws, keeping the stock wheels. With the pandemic, the wife and I have working from home, and so I have not driven a whole lot on them, and we have not had any harsh weather so far, but I love the aggressive look and stable, grounded ride. They are a lot quieter than people say, if fact, barely noisier than stock. It looks like we are both happy with out choices!
 

Toytec

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Same as you Marc. 'Cept I had the mediocre Bridgestone A/T's. I did a practice air down the other day to 18psi. You could hardly tell by looking. They're tuff! Took about 3 min to get back up to 32.
 
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Obijack

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Not concerned with top speed as this is a truck.
 

DanaBovender

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109 is where the speed limiter kicks in. I have confirmed this a few times. Lol.
I live in Germany, my Lariat 4x4 is US Spec and the limiter does not come on in mine until it hit 112. I just had to test it....was pretty scary, knowing that something with this much mass can get there pretty quickly too.
 

RangerCoby

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I live in Germany, my Lariat 4x4 is US Spec and the limiter does not come on in mine until it hit 112. I just had to test it....was pretty scary, knowing that something with this much mass can get there pretty quickly too.
Interesting. I was told or read 109 so I assumed this was right. It could have been 112 but I didn't confirm with GPS.

Are you using the dashboard or a GPS to confirm your speed?

Cheers,
Coby
 
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DanaBovender

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Interesting. I was told or read 109 so I assumed this was right. It could have been 112 but I didn't confirm with GPS.

Are you using the dashboard or a GPS to confirm your speed?

Cheers,
Coby
GPS, and I must say that the speedo is 100% accurate in my truck 75 is 75 and 112 is dead on 112 on my GPS
 

RangerCoby

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GPS, and I must say that the speedo is 100% accurate in my truck 75 is 75 and 112 is dead on 112 on my GPS
Makes sense. I know my dash and my GPS aren't the same. When I have cruise set at 80, GPS says 79.

I like 112 better :cool:
 
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port43

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140mph in a 1972 Camaro
98mph in one of my Chevettes and I thought it was going to come apart
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125mph in a 1989 Probe GT
130mph in a Fusion
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98mph in Amber so far
 

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