Whats the difference in tunes?

[Sburn]

Originally Posted by Jon Roseman

Anyone got any experiences with adjusting their shift points or anything I can do while I wait for my tune?


Jon

Starting from the canned 93 - Performance tune, here's some of the little tweaks I've done. Note that I have a 4.6, not a 5.4.


Octane: -2 counts becasue I don't use 93 or 91 octane gas.

1 -> 2 Upshift +2 MPH
2 -> 3 Upshift +10 MPH

The 2 -> 3 upshift change made the most difference to me. Seems like my 4.6 is just starting to get its legs as it revs up in 2nd.

3 -> 4 Upshift +5 MPH

I changed the corresponding down shifts to match the above.
Left all T/C locks/unlocks alone, but I might adjust this after I drive as above for a while and when things dry out in CA.

Shift firmness: +2 on 1 -> 2, +5 on 2 -> 3 and 3-> 4.

I don't expect to adjust RPM limit since my butt dyno tells me the stock 4.6 is past the torque curve much after 4500 RPM.

I left speed limit at facory 95 MPH. Darn few safe places to go faster than that. Plus factory tires are crap for those kinds of speeds.


Like it says in the manual, make small changes.

Also, try to only change one thing at a time so you'll know what works and what doesn't.

Keep notes, because if you do make small changes and one at a time, you'll be making those changes over weeks and not be able to remember what worked good and when.