Striker1911

When I got 315/65/17 on my 2005 5.4 triton I tried to pass someone and my truck topped out at 85 mph. Curious I tried it again later on and once again it topped out at 85. Any help or tips to fixing this.

alsatropine

iTrader: (2)

You cant stock wise. Since you got larger tires it dropped your spedometer about 5 mph. Our trucks are governed. It will start to shut down around 92.

Striker1911

I've had my truck pinned at 115 before I had the 315s so it can't be that

I just don't know

Yep with my programmer I set to top at 100. No need to go faster IMO in a truck with sloshy breaks.

dougbattaglia

My 2013 Eco has been to 102 mph but don't know if it will go faster or not. No tuner, just stock

Logan24

Oh it'll go faster, I've been over 180/kmh and still had more juice. I have a tune/exhaust/intake tho. Truck gets pretty squirrelly at those speeds tho. Lots of air pressure under your truck at that speed.
PS - don't get caught going that fast, here in Canada anything 50/kmh over the limit and you have yourself a date with a judge.

Black FX2

tuner

Twisty

"Any help or tips to fixing this."
I've driven a few cars and trucks.
A 1973 Mercury Marquis Brougham rides real nice at about 90 to 100 mph.
A 1998 Chevy Malibu will not go more than 82 mph.
A 1992 Chevy 1 ton dually 4x4 will do pretty good on gravel up to about 65 mph.
A 1974 Chevy Blazer with a 4 inch lift on 35 inch tires will have Derek begging you to slow down at 85 mph.
My F150? At 75 mph, I get nervous. It handles like sh*t at highway speeds.

seannh

The custom tune in my LivewireTS was set to a 100MPH limit, which at first made me think it was a tad low; but as everyone else has said so far, I don't think I want to be going much faster than that. My brakes were just inspected at the dealer and are well in spec and the truck still sloooooowwwws to a stop.

thetacticaltiger

I've only tried once but my 04 4.6 stops at 90! I wonder if that's all the power i have or a limit