geabis

You need to find the sweet spot. on my 450 its around 16psi. On my old gmc it was at 12 psi. I would launch in 4x4 to increase traction an could launch at a higher psi . These were both diesels. So the sweet spot on a gasser is probably closer to 4 or 5 psi. If I would boost to 25psi on the 450 it would just smoke all 6 tires and not get any traction. There's a line and once you apply to much power its hard to recover a good run from it. It's best to start again at a lower psi.

dcfluid

Keep the ecoboost below 2000 rpm on launch. Target 1700 for most tires. Screw configuration helps with traction. I have the FX4 with the 2wdr diff locker modification and use that for max traction. Leave the traction control on. Every test I see with trucks get better times with TC on.

The 5.0 feels perkier to drive, until you learn how to use that partial throttle low rpm torque surge.

geabis

I knew someone would have it dialed in. Good info for the guys that are spinning off the line. Haven't had a chance to drill down my 6.2 yet. I really need a weekend at the track.

dcfluid

I don't race but took info from posters who do and tested it out on my own. Anything 2000 and above on launch is two much and would need slicks on good asphalt.
The diff locker is a big help as she lights up pretty easy even with one wheel spin control and traction control. It stops that 1/2 second slippage it takes for the computer to control full throttle wheel spin.
I have no idea about launching a 5.0.
Perhaps some 1/4 mile runners could give us some 0-60ft times and their hints.

geabis

A lot of people like to built HP and run trucks fast because the components and power train are made to handle big power and torque. So you can invest your dolla in power without having to spend on the components to handle the power.

When I built my first pony I blew the 5sd, and then the rearend. Then I had problems with body flex (t top car). It's just more economical to play with a truck.

If I was building a weekend racer to be trailered to the track, it wouldn't be a truck. But to have fun with something I drive to work and take to homedepot for a bag of concrete. I'll play with my truck. I also like the look on the guy driving the ricer wit the turbo muffler that sounds like a garden tractor cutting a field at 110 mph. When I pull next to him a 75 chirp the tires on the down shift and pull away like he is standing still.

geabis

I don't race much anymore. Just go to the track with a friend that still does. A couple times a year. It fun to participate and run the truck to see exactly what makes the difference. There are so many variables just driving a straight line, its mind boggling. And you can't trust your *** to be accurate on what was the better run. That's why you need the traps. You get all the data you need.

Loki 5.0

You can't compare those numbers given the type of Dyno 5 star uses is known to read lower than the Dyno K& N used.

jswd60

I raced mine against some chevys (won every race, they thought ahh its just a Ford its slow). There were no timeslips, just somewhere to race off the streets. Anyways traction control on or else I would just spin them. Launch at 1800-2000 rpm and the tires would bark but grip. The guys I raced all did burnouts and tried to launch way too high and spun off the line. You might be able to do higher launch with a 4x4.

engineermike

Tell that to 39,687 Lightning owners, and probably 10x that who have modified their F150's for speed.

engineermike

You COMPLETELY missed the point.

In the 2 comparisons where both engines were run on the same dyno in the same conditions, the EB beat the 5.0 by 17-30 rwhp. The 5.0 gained 20 rwhp when tuned. Therefore, a tuned 5.0 will not be "a lot faster than an EB".