WAY BAD

Does anyone know if Ford puts more TQ/M in the tow/haul mode? I know in other trucks I've tuned in the past, the tow/haul table has more TQ/M than the regular table does...

mrpositraction

That makes a lot of sense. You want to cut power during shifts to save the transmission!

Obviously this hinders performance but saves the mechanical wear on equipment.

Joewee3.5

Then why does tow/haul firm up the shifts and hold the gear longer. Seems completely opposite of tq management. Maybe a thread needs to be started to see who uses tow/haul at the track and who doesn't.

WAY BAD

There's difference in transmission line pressure and TQ/M. You can raise line pressure in the transmission to make a firmer sift, and still have TQ/M. TQ/M is the pulling of engine timing so the engine makes less torque in between shifts or the closing of the throttle blade to achive the same thing. Increasing line PSI increases the clamping force of the clutches in the transmission. Which is exactly what you need when towing.

Not saying ford does this in tow/haul mode, but may be a possibility... Would like to have confirmation from a tuner on this to see, and if the tuners are removing the TQ/M and how much if they are.

So what may be happening, when you're staged with the RPMs up that high and on the brakes. The ECM may think that it is in some kind of unwanted bind, and closes the throttle blade, or even holds that position until it receives a signal it is no longer in that unwanted bind. Hence the "fall on it's face" when you hammer it to launch. Just my theory...

O2brich

The stock tune for my Mustang pulled timing during shifts. That was one of the first things I changed when I get my tuner. Before that I could never chirp the tires going into 2nd.

CoreyMS

I've never waited and held boost, I usually first stage let them full stage and boost roll it into the second stage...kinda boost and pump the brake to stage and the light drops. Usually I don't hold it high until the yellows and right before green (1/2 second) I lay it to the floor and let her rip. I've still never done better than 1.84 60'. I have noticed the harder I launch it kinda hurts it but more from spin.

I can only remember once it doing something weird once and it was from the guys not having the tree on automatic, they would have to press a button after you staged and they waited late and I had already boosted up and its like the throttle went to idle, and as fast as it did the light dropped and I was like wtf for a half second and let off the gas and hit it again and the truck went. I think this is what your talking about. I only remember it once and don't remember what tune. It was the first time at the track.

Joewee3.5

^ sounds right. I'm used to boosting up my diesel and just going. I held boost for a couple seconds and it went straight to idle when I floored it. Then back to life but by that time I was losing the race so I just crept the rest of the way. I think there are still some trans issues that can be self with to knock some tenths off.

CoreyMS

It is probably a good thing as far as stopping excessive heat build up in the torque converter. The fastest two wheel drives have all only boosted to 1800 or close for tire spin. I really haven't spent a lot of time finding my best launch. Usually trying to launch hard rather than experimenting.

I'd really like to see that truck that ran so fast on the livernois tune and what he's doing. No one else has really ran close with the same mods with the same truck.

Joewee3.5

Yeah I'd like to know what is going on there too. I had good air, 15-20 tailwind, and a 1.8 60' and I trapped 99. I think that truck has a 170 stat and lighter rims, everything else is the same as mine but it trapped 103. I could not have had better conditions. 4mph is a huge amount of power I'm missing for being modded nearly the same.

Mark Miller

I was using tow/haul but it seemed inconsistent.Some guys on here said don't use it.It then seemed to be more consistent and ran 14's almost every pass.My best pass has been a 14.67 at 93.7 mph,2011 F-150 Supercab 4X4,3.55LS rear truck is still bone stock.

Later Mark.