Are trim levels tuned differently?

I keep seeing on the forum and elsewhere that the SR isn’t tuned to be as fast as other trim levels, and basically the higher the trim level the faster the vehicle, or something along those lines.

Is there any truth to this?

Sounds kinda crappy to get the same V6 but its throttled back because of its trim level.

 

The SR is detuned to make less power. Either live with it, or buy an SR5 on up.

 

Common for work truck configurations to reduce stress on the motor. F250 6.7 diesel is 450HP. F550 6.7 diesel is 330HP. Regeared to get the towing power.
Also, common for yachts and marine products. A Cummins diesel of the same displacement will be rated at 20,000hrs in a high HP configuration and the same block rated at 50,000 in another.

 

Anyone know how much of a longevity difference the detune makes when it comes to engine life? I can understand the logic but does it make THAT much of a difference? I'd love to see some articles, graphs, or stats.

 

LOL I have an SR5. I just don’t think its known by average jamokes like me when they’re buying their new vehicle. I thought it was creature comforts and cosmetic upgrades with higher trim levels.

I assume the higher trim level tunes will be out there at some point. Then Toyota can’t get upset if people end up tuning their SR to an SR5 or higher tune.

 

Its like buying a CA compliant AR-15; buy a $3k rifle and its only limited to 10 rounds.

 

Probably not. That doesn't make any sense. I'll believe it when I hear it from and actual Toyota engineer.

 

Yes, but the F550 is a much heavy truck, in a completely different class. Different gearing, rear end and probably trans.
Are there 100HP differences among the 6.7 F250s, based on cosmetic trim packages?
That would be an apples/apples comparison.

 

Chrome = Less power and more noise so people will look at you.

...or is that only applicable to Harleys?

 

Point taken. I took the question the wrong way thinking more along the line of are detuned motors sold.

 

Interesting. I wonder what the reasoning is for them to start tuning differently with the new gen. They certainly didn't do it on previous gens.

 

Specifically, companies do sell different HP of the motors with different trim levels. Easy example is a Porsche Turbo vs Turbo S. 572HP for the Turbo and 640HP for the Turbo S.

 

Having just gone through a buyback/lemon law on my F150 I'd be very careful about mods in the warranty period with any company. Yes, I know what the law is but the practical realities are that if they discover a tune and you have an engine issue you'll be in the position of having to prove the tune didn't cause the problem. It is an absolute and complete PITA. Keep in mind, by the time you end up in a lemon law situation it's attorneys settling the case not customer sat. or technical people.

 

It starts with the f450, pick up or cab and chassis truck decides the output level. Otherwise they’re the same. That’s why my buddy bought the pickup version and swapped the bed for a flat bed.

 

There's a piggyback tuner for $650 that doesn't leave traces on the ECU, brings the SR up to the SR5 stats.

I do have an SR, but I'm gonna live with it, I am concerned the SR5 and above tuning is grenading engines

 

Its common because of how they are dyno tested and the emissions requirements an F550 has to meet vs an F250.

Thats not exactly that same as the SR Tundra vs an SR5 Tundra. Thats because Toyota is trying to upsell everyone. Or possibly because they are building the SR trim with lighter components(not confirmed). For example, the new Tacoma just debuted and has two power levels(technically 3 since the manual trans is slightly detuned from the core engine) of the same 2.4L engine. The higher speced engines get a 9.5" differential while the lower spec'd ones get a 8.4"

I mean they kind of did. You had the 4.7L and then the 4.6L as the base motors.

 

Millions of F150 Ecoboosts with the same specs as the tundra motors have been driven on 87 for the last 13 years and were not regularly grenading because of bad batches of gas. Toyota would have had to really screw up the tuning for that to be the cause.

Based on what I have seen with my F150, I could run on something like 80 octane before the PCM ran out of safety net.

You will see the biggest difference towing where you are under constant heavy load.

 

funny, been driving toyota's since 1984 and i only use 87. i have not had an engine issue once in the 15+ toyota's i have driven.

edit: i have never had a need to use anything higher than 87

 

How many of the 15 were naturally aspirated?

 

all of them.

 

perfect

 

LOL, you can add your state of residence to that list as well.

 

Its like buying a CA or CT or DC or HI or IL or MD or MA or NJ or NY or VT or WA compliant rifle…