This weekend's "events" have left me wondering something about my truck.

Does anyone know if Ford put a speed limiter/governor on our V10's? If so, how does it work and at what speed does it kick in?

I have a 2005 F350 V10 4x4. Thanks!

 

My 2001 is limited at 96MPH - and I've bumped it a few times - when like that darn Dodge 1500 hemi got away from me

There is also an RPM limiter, I think it's around 5200RPM? 5600RPM? I forget.

 

Sure there's a governor on the V10. I think most of us do 70 at about 2200 rpm. So at 4400 rpm it would be trying to do 140 mph with an extra thousand rpm to spare to fight the wind!

Also, I think I'd go with the limiter at 5200 or so. Don't think I could hit 5600.....

 

Ive got her to go higher then 5200. Not much more but over that. It was 5600. Just put it in first and accelerate from a dead stop and go up to like 40 mph then shift haha

 

Exactly! Many confuse the 5200 shift-point of the auto tranny with the redline... they aren't the same.

As for the original question, all new vehicles have a speed limiter and an RPM limiter. Generally, speed is limited to what the OEM tires are designed to handle. Of course a "chip" can remove/adjust both limiters should you so desire.

 

Hi Guys!! I live in Italy and the highway here are like tracks....so....I wondering to have some tips to took off the speed limiter at all.....
anyone done that??

Thank you....
Peppe (Joe)

 

Welcome Joe!

You need a tuner/programmer. Various models will do what you want.

Is it a US-emissions spec vehicle? What does the underhood sticker say ?

 

Hi Krewat!
Mine X come from California....so it have California US-Emission

Thank you for your help!

 

My truck shuts down at 160 km/h which is 96 MPH, I am turnig close to 2,700 rpm at this point. I have ordered a Superchips FlashPaq Tuner and I have been told that this will eliminate the speed limiter. I will keep you posted.

 

Just be advised that the speed limiter is there for a reason. NoMo said it. TIRES. Now, I highly doubt that your tires will fail if you go say 107 but they are not rated for sustained speeds over 106 mph. Keep that in mind when adjusting the speed limiter.

Check the speed rating on the tire. eg. 265/75R- R16. R is the speed rating.

P 93 mph
Q 99 mph
R 106 mph

Your's may not be an R. It may be lower or even higher depending on brand and size.

 

I know this is kinda off topic but the "R" you are referring to lists rim diameter. If you wish to know your safely rated speed this is how for Yokohamas(my tire choice) but the same "Letter/Numbering" system works for all manufacturers here in Canada:<TABLE cellSpacing=0 cellPadding=3 width=496 border=0><TBODY><TR><TD vAlign=top colSpan=3>

</TD></TR><TR><TD vAlign=top colSpan=3>
Service Description
Many tires come with a service description added on to the end of the tire's size. These service descriptions contain a two-digit number (load index) and a letter (speed rating). The load index is a representation of the maximum load each tire is designed to support. Because the maximum tire load capacity is branded on the tire's sidewall, the load index is used as a quick reference.

</TD></TR><TR><TD vAlign=top colSpan=3>Use the following chart to determine the maximum load-carrying
capacity based on a tire's load index:
</TD></TR><TR><TD vAlign=top colSpan=3>
Speed Rating
Speed ratings are certified maximum sustained speed designations assigned to passenger car radials and high performance tires. Because of the evolution of high-speed passenger car travel, it was necessary to establish a way to rate a tire's high-speed capability. In the U.S., these ratings are based on tire testing in laboratory conditions under simulated loads (European testing uses actual road testing). For a tire to be speed rated by the U.S. Government, it must meet certain minimum government standards for reaching and sustaining that specified speed. Domestically, high performance tires must be speed rated. The tire industry defines high performance tires as those with speed symbols of "S" or greater and aspect ratios of 70 or lower. Yokohama goes one step further and defines high performance tires with a speed symbol of "H, V, W, Y," or "Z" and an aspect ratio of 70 or less (typically, 60 or less). Conventional passenger car radials need only meet the minimum Department of Transportation standard of 85 mph. Speed symbols may currently be marked on a tire in any of three ways: 205/60ZR15; 205/60ZR15 89W; or 205/60R15 89W. The International Standard Organization system (ISO) currently serves as a worldwide standard for tire markings. At the end of a transition period, any speed symbol denoting a fixed maximum speed capability will be at the end of the service description following the tire marking (illustrated in the second and third examples above).

</TD></TR><TR><TD vAlign=top colSpan=3>
*z rating refers to open ended speed capability.

Warning:
Speed ratings apply only to the tire, not to the vehicle. Putting a speed rated tire on any car does not mean the car can be operated at the tire's rated speed. </TD></TR></TBODY></TABLE>

 

I realized that after posting. I'm was reading Tire Rack's website to get my speed rating and the tire size was written with two R's. Most all the other tires had two letters there as well. However, I've never actually seen it on a tire like that. Your info was spot on. Good cut-n-paste.

 

Actually, that "R" in 265/70R16 denotes a radial (vs bias) tire.