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Lion77

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And you can make up to 405 hp with 91 or higher octane :) on that same engine. So best of both worlds on that. Downside is cost as the RR is considerably higher priced and you lose a lot in towing due to the off-road focused performance suspension which limits vehicle stability when heavily loaded.

Just depends on what you're doing, but I'd wager that 5,500lbs is plenty for 90% of users. I think most of us maybe tow at most a side by side, ATV, small camper or bass boat which are the most common things in that weight range.

Big campers or larger boats etc. are best going to be handled by a full-sized F-150 as its not ideal to regularly tow max. I look at max towing / payload as "do it on occasion, but not regularly". If you regularly tow, I'd say it's safer to have a nice 2/3 derated margin, so maybe 5k on a regular ranger or 7k on an F-150 so you not pushing the thermal and mechanical stresses to the limit.

In engineering, if you want something to last, especially under harsh environmental, NASA, Military and Industrial typically call for 2/3 derating. If you stress something close to its absolute max, the lifespan is usually considerably shortened vs. running at 2/3 of its max where it will typically meet or exceed its lifespan.

I might say the RR is bit of an exception to that rule since the engine is more powerufl than the regular ranges 2.7 NANO and it's the same transmission. The lower capacity comes primarily from vehicle stability limitations rather than thermal management and physical stress on the drivetrain, so this is one truck I do think towing max is a bit less burdensome.
 

stemplar

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I think you're wrong. Higher octane fuels don't ignite without higher compression. The difference isn't temperature. That's my understanding anyway.
You and tuningchamp are both kinda right and kinda wrong. Octane ratings measure a fuel’s ability to resist detonation. Sources like Wikipedia mention compression specifically but if we put our scientist hats on for a moment we’ll recall from high school chemistry that pressure (compression) and temperature are most certainly related (pv=nrt). So a high octane fuel that can withstand higher compression without predetonation is indeed enduring higher temperatures too. As an aside, there’s a whole class of engines that run on this understanding, and they just compress atomized fuel until it goes BANG; they’re called diesels.
 

tubingchamp

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You and tuningchamp are both kinda right and kinda wrong. Octane ratings measure a fuel’s ability to resist detonation. Sources like Wikipedia mention compression specifically but if we put our scientist hats on for a moment we’ll recall from high school chemistry that pressure (compression) and temperature are most certainly related (pv=nrt). So a high octane fuel that can withstand higher compression without predetonation is indeed enduring higher temperatures too. As an aside, there’s a whole class of engines that run on this understanding, and they just compress atomized fuel until it goes BANG; they’re called diesels.
Oh, bro, I am NOT "tuning"champ... Tubing.... from inner tubing on the family's lake as a kid.. HAHA :)

Thanks though, I felt like I heard somewhere that there was some resistance to burn related to octane rating.. but far from an expert. Appreciate the science lesson.

Stoked to hear impressions from other users about the tune, though. I'm kind of tempted, but also want to keep my warranty... I ended up getting 7yrs, will see what the aftermarket provider says about tunes.. :)
 

danmoochie

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Temping and most likely fun but no.
If not for premium gas I would have bought the raptor.
2.7 is fine out of the box
Raptor doesn't require premium fuel.
 

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Jason B

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And you can make up to 405 hp with 91 or higher octane :) on that same engine. So best of both worlds on that. Downside is cost as the RR is considerably higher priced and you lose a lot in towing due to the off-road focused performance suspension which limits vehicle stability when heavily loaded.

Just depends on what you're doing, but I'd wager that 5,500lbs is plenty for 90% of users. I think most of us maybe tow at most a side by side, ATV, small camper or bass boat which are the most common things in that weight range.

Big campers or larger boats etc. are best going to be handled by a full-sized F-150 as its not ideal to regularly tow max. I look at max towing / payload as "do it on occasion, but not regularly". If you regularly tow, I'd say it's safer to have a nice 2/3 derated margin, so maybe 5k on a regular ranger or 7k on an F-150 so you not pushing the thermal and mechanical stresses to the limit.

In engineering, if you want something to last, especially under harsh environmental, NASA, Military and Industrial typically call for 2/3 derating. If you stress something close to its absolute max, the lifespan is usually considerably shortened vs. running at 2/3 of its max where it will typically meet or exceed its lifespan.

I might say the RR is bit of an exception to that rule since the engine is more powerufl than the regular ranges 2.7 NANO and it's the same transmission. The lower capacity comes primarily from vehicle stability limitations rather than thermal management and physical stress on the drivetrain, so this is one truck I do think towing max is a bit less burdensome.
That's not how it works. For example, when certifying lifting lugs and slings on heavy equipment, they are designed and tested to 2 1/2 working load. So, a 10-ton lifting sling is tested to 25 tons. Framework we build to carry loads are also design, built and tested to 2.5 times gross weight, and piping systems are hydro tested to at 2.5 times working pressure. Head room is always designed into the system.
So, IMO. If a truck is rated at 7K Max towing, then it's 7K Max, not 4.5K. Would I do it? No, but that's has more to do with my abilities and comfort levels, not the vehicle.
 

Lion77

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I never said you can't tow at max capacity. Not once, please read carefully. I talked about vehicle lifespan. Running anything by its designed maximum will shorten its lifespan vs. 2/3 derated use (with a few exceptions).

For example, the RR uses the same transmission and a higher-powered engine than the regular rangers with the 2.3L I-4 or 2.7L NANO V6 (the 3.0L is a bored and stroked 2.7L block, larger turbos, higher flow piping / intake etc).

So, the limitation of the RR comes from the off-road suspension which limits vehicle stability with heavy loads vs. leaf springs and lower ride height. So towing 5500lbs with the RR is basically about a 2/3 derated capacity as far as stress on the engine and drivetrain (both mechanical and thermal).

On a regular ranger, it would shorten the useful lifespan to frequently tow 7,500lbs vs. towing 5,000lbs regularly, about 2/3 of the max. That's all I was saying. Has nothing to do with not being able to tow the max rated safely, rather how long will it last when pushing it to the very limit constantly vs. towing 2/3 of that limit where there's a larger mechanical load and thermal load margin still.

Towing limits factor in 1. thermal stresses 2. mechanical stresses and 3. vehicle stability under load. Exceeding any one of those results in disaster. If you tow on a regular basis, you'll get a lot more life out of the vehicle by NOT regularly towing more than 2/3 of its rated max regardless of the vehicle.

It's almost a universal constant of mechanical and electrical equipment. But the RR is a bit of an exception because the 5,500 lb limit is there primarily due to vehicle stability. The engine / transmission are capable of towing the 7,500lb load, so towing the max of 5,500lbs is like towing 2/3 derated load aside from stability, but that's more of a safety concern for losing control of the vehicle vs. shortening its lifespan like mechanical and thermal loading.
 
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hand-filer

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Bizzare how this thread has devolved from tune availability to octane and towing capacity and a whole lot of blah.
 

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tubingchamp

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So basically the tune is useless if im not gonna run premium?
Basically, if you want more power out of an engine, you need to expect the need for premium fuel so that the added engine stress doesn't affect the durability as much.
Premium fuel -> less chance of knock -> more power
 

werkout52

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2.7 out of the box is fine for me too. I'll burn premium every 4th tank or so to make sure my injectors are happy.
Any difference in power with premium?
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