whats the highest rpms a 5.4 can handle in 1st gear??????????????, i got mine set at 5700 rpms in 1st gear, 5250 rpms in 2nd , and 5150 rpms in 3rd, and i string it out atleast a couple times every other day and ive been runnin this set up for like 4 months, i didnt mess with my shift firmness, or timeing, and i wana know whats the fastest you guys have got your 4x4 f150 up to????, i got mine up to 114mph

 

Looks like you've got it set at the rpm limits in 1st and top speed is about it too with a "canned tuner". What gear ratio do you have?

 

This is really dependent on your engine and transmission (what does the torque curve look like above 5000 rpm?). You need to leave room at the top end (WOT) to prevent the torque converter from ballooning.

I would consult my tuner manufacturer or custom tuner.

 

i got 3.56s, but i got 4.56s out in my shed, just savin up money to get them installed

 

I've got mine set at 5600 RPM's in first and second and 5400 RPM's for third. I don't think I've got that high in third gear though but it does right at 100 in second gear. Bump up your shift firmness, mine is and I love it.