Poffdaddy

I haven't been able to find any official torque curves on the gen 2 3.5 ecoboost. I know it makes 470 lb-ft at 3500 but I would like to see the whole curve. Does it still make 420 lb-ft at 2500 like the first gen 3.5? Does anyone happen to have and dyno charts they've done stock?

w00t692

Stock vs tuned

w00t692

I also wanted to mention that the torque curve on this truck is set by the ECU. It can make way more down low, but based on the pedal ratio map and the driver demand torque mapping, it will never make tons of torque down low.

Poffdaddy

Thank you for sharing. Is that from your own vehicle or one that you have found? That is a stout torque curve. That is the only thing I have noticed is that the torque right off idle isn't great until about 2000 rpm. I came from driving a 2017 silverado 6.2 v8 with 8 speed for 2 years. That engine had torque right off idle due to the displacement. In general after the 3.5 ecoboost gets to 2000-2500 rpm it is more stout than the 6.2 v8 and the 10 speed transmission is superior. Mine also has 3.55 rear end. I love it.

w00t692

That's my truck. Also we are on a dyno so we're starting pulls at 2000 rpms. It's pointless to check for torque off idle on a dyno as you really can't (it will downshift automatically below a certain rpm even in manual mode) . Also the fact that the torque converter spins you up past 2000 rpms basically instantly makes it a moot point.

Poffdaddy

So it actually makes a lot more torque below 2500 rpm than this dyno shows then? The drive line loss only seems to be about 15% on stock which is really good too I would say. I always hear 20-25% driveline loss. Was the stock run on 87 or 91 octane? Does this engine make more power on 91 octane?

cobrascott

stock vs. tuned What graph is stock am i missing something on the graph that shows which one is stock or tuned, i can guess

mass-hole

I just asked the same exact question on the other forum and got this in response:



Same dyno, all trucks on 93 octane(except PSD of course), same correction factor, but different days. The 3.0 PSD is an animal btw. rated at 440 tq to the crank and dynos 472 to the wheels. The 2.7 is also an animal and hang extremely well with the 3.5 stock vs stock. I suspect this is why we see people saying they thought the 2.7 felt as fast, cause it is. This graph is pretty consistent with woot692 stock dyno.

I still have not seen a gen 2 official power curve like this though:

mass-hole

The engine should make more on 91 or 93. Look at the Platinum Expedition, it has the same motor and is rated at 400hp/480ft-lbs on 93 octane while the other Expeditions and F150s are 375hp/470ft-lbs on 87 octane. Also, if you look at the expedition specs, the peak torque of 470 or 480 comes at only 2500 rpm, not 3500 like the F150.

cobrascott

Wow, that graph is hard to read ,cannot differentiate most of the colors