Unlocking top end power?

[JCraven94]

Took my 22' XL out to a flashlight drag event and had a great time, even though I got whooped on pretty good . I ran a Focus ST (bolt ons/ tune), 5.0 Mustang (assumed stock), 2.3 EB Mustang (bolt ons/tune), and got paired up with a Nissan GTR (hella built) as well, which was hilarious. Other than the GTR, I had a pretty good jump off the line on the other three, Focus ST and EB Mustang being the closest races, but definitely noticed a significant power falloff in the upper end. My truck's not built by any means, I run a DIY intake, aftermarket muffler with resonator delete, and an out of the box 93 tune from SCT. I've seen some serious builds on here and other places, just curious what the performers are doing to help free up the restriction and maybe get a bit more flow in the upper end. I assume down pipe, intercooler, things of that nature would help, but want to hear people's real world experiences. I'm sure the tiny turbo loses a lot of flow as well, I notice pretty decent boost falloff around 4500 or so RPM. It was about 90 degrees and above today, seen about 17psi max out of the turbo. Let's discuss!

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[BLUEOVALRACER]

Was that a 1/4 mile race and did they time You? Was that the 5.0 Mustang in the Video or 2.3 EB? Is Your Maverick FWD OR AWD? And Thanks for the Video!!

 

[JCraven94]

Was that a 1/4 mile race and did they time You? Was that the 5.0 Mustang in the Video or 2.3 EB? Is Your Maverick FWD OR AWD? And Thanks for the Video!!

It was an 1/8 mile course, no timing just win or lose. The Mustang in the video is the EB, dude was super cool. My truck is AWD, which honestly is the only advantage I had .

 

[OleFordGuy]

Nice, I know that's a lot of FUN !!! Haven't done any of that in a long long time so I have no first hand experience with the 2.0 upgrades. I would assume downpipe, intercooler, turbo upgrades would help.

 

[Quest]

Turbo size is your biggest limiter

 

[Bulk]

"significant power falloff in the upper end"

What's your elevation? That's around stock boost levels, with a tune.

 

[Rileyotta]

Took my 22' XL out to a flashlight drag event and had a great time, even though I got whooped on pretty good . I ran a Focus ST (bolt ons/ tune), 5.0 Mustang (assumed stock), 2.3 EB Mustang (bolt ons/tune), and got paired up with a Nissan GTR (hella built) as well, which was hilarious. Other than the GTR, I had a pretty good jump off the line on the other three, Focus ST and EB Mustang being the closest races, but definitely noticed a significant power falloff in the upper end. My truck's not built by any means, I run a DIY intake, aftermarket muffler with resonator delete, and an out of the box 93 tune from SCT. I've seen some serious builds on here and other places, just curious what the performers are doing to help free up the restriction and maybe get a bit more flow in the upper end. I assume down pipe, intercooler, things of that nature would help, but want to hear people's real world experiences. I'm sure the tiny turbo loses a lot of flow as well, I notice pretty decent boost falloff around 4500 or so RPM. It was about 90 degrees and above today, seen about 17psi max out of the turbo. Let's discuss!

Do you have the tow package? The gears are different and you lose top end speed in exchange for low end torque I believe.

 

[JCraven94]

"significant power falloff in the upper end"

What's your elevation? That's around stock boost levels, with a tune.

Where we were at, about 1,070 feet at that airstrip, so I can see losing a few PSI. I usually run closer to 19 under full boost in my area. 0-60 was always great, then it felt like it just fell on it's face every time.

 

[JCraven94]

Do you have the tow package? The gears are different and you lose top end speed in exchange for low end torque I believe.

No tow package on mine

 

[Bulk]

After digging it seems that the 2.0 ecoboost uses a Borg Warner K03 turbo. Which are good for about 15psi boost with OEM housings. It's very possible it's being pushed out of its efficiency range; especially if it's making more boost lower in the RPM range and it's tapering off as the RPMs rise.
https://www.motorreviewer.com/engine.php?engine_id=134

 

[JCraven94]

After digging it seems that the 2.0 ecoboost uses a Borg Warner K03 turbo. Which are good for about 15psi boost with OEM housings. It's very possible it's being pushed out of its efficiency range; especially if it's making more boost lower in the RPM range and it's tapering off as the RPMs rise.
https://www.motorreviewer.com/engine.php?engine_id=134

Interesting, makes total sense though. These turbos are meant for quick spool at low end but really aren't meant for sustained power, they just don't have a lot of CFM. I honestly didn't pay much attention to the boost pressure towards the end of the run, was more focused at the cars catching me haha. Even being limited on boost pressure, I'm just curious what kind of supporting mods make the biggest difference to that upper end before inevitably having to do something like a turbo upgrade. Also, curious on the real limitations of the 8F35 trans as well. Everything I've seen says they're already under-rated for the stock configuration as is, and working at a Ford dealer for a while, I've seen quite a hand full of them fail, usually due to torque convertor failure which takes out the whole trans a lot of times. Although it seems to be less prominent in later models. Apparently ford has done some sneaky programming to try and prevent such things from happening.

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