fx4 fr3ak

I have a 2013 fx4 5.0L V8 with SCT tuner 87 octane from 5 star tuning. 6inch BDS lift with 35x12.50x20 nitto trailgrapplers. As well as a flowmaster delta 40 series exhaust. No intake.

This was my quarter time and stats.
Now compare to stock which is.
360 hp
380ft/trq

How come I'm not getting that?. Or even close?.
Are these fly wheel stats or rear wheel?.

fx4 fr3ak

If you can't see tuner reads.
317.5hp
340 ft/trq
With a 16.8 quarter mile time

dieselhunter44

Weight looks a little on the high side, and I'm betting those power numbers are rear wheel, not flywheel

obusnizzle

There is no way you are putting that much power to the ground with those tires.

gDMJoe

The HP/FtLb #s that the factory publishes are always at the flywheel (unless noted otherwise).
.

phantomblackgto

Only way to know for sure is go to the track and dyno. Those tires have got to be costing you quite a bit.

fx4 fr3ak

Do you know whether my tuner would be presenting rear wheel or fly wheel stats?..

XL-ent

Posted on wrong thread

Eric M

The tuner is just doing math. Punch your numbers in here and see what you get compared to the tuner.
https://robrobinette.com/et.htm

It's calculating the actual horsepower it takes to move that weight tin that time, so it'd be calculating it at the tire, but they might throw 15% on it so it's closer to flywheel numbers people are used to seeing.

TriSum

Year: 2018
Model: XL
Engine: 5.0L
Cab: Regular
Bed Length: Short
2WD/4WD: 4WD
Gears: 3.73
Transmission: 10 speed
Weight: 4520 (1/4 tank) ~4800 at track
Mods: None, 91 octane
1/4 time: 14.089
MPH: 98.78