Its probably been discussed some, but as long as I have my truck dyno tuned will I be safe with a 6# lower? I have the Diablo chip already and I was looking to buy a 4#. The deal fell thru and now I am able to pick up a 6# for a good deal. My truck is a daily driver with chip/air/magna/little head work and a few other little things. I dont want to shorten the life of her to much with a 6#. What do you guys think.

Thanks in advance!!

 

why not a 5lb?

 

If I could find a 5# for at or near the same price as the 6# then there would be no problem.

Can anyone tell me anything about the 4 vs. 6? Will I be ok with a 6 on a daily driver with the right tune?

 

Yes, with the proper tune. There are a few here who are doing it with no problems. Make sure to get it Dyno'd immediately though with the chip to make sure.

https://www.f150online.com/forums/sh...hreadid=132505

this is a new thread discussing someone who not only is running 6 pounds of boost, but also Nitrous. You should be ok.

 

A good tune is the most important thing....a 4# with a bad tune is much worse than a 6# with a good tune. Put it on a dyno and have the A/F checked, and don't go crazy with the timing. Also, if you want any longevity with the 5.4, keep the rpms below 5300. Until you get around 450rwhp, a good tune and limited rpms will go a long ways toward keeping it safe. Above that, and you should offer daily sacrifices to the Rod God, carry a rabbits foot, or have stock in Manley.

 

Great!!! Thanks for the help.

 

I tend to think that the benefits of going from a 4# to a 6# are pretty small, because at higher RPM's, you are probably at the flow capacity of the blower. A 6# should give a little more low end, since boost will build quicker.

As others have said, I think the tune is everything. An overly aggressive tune on a 4# is worse than a good tune on a 6#.

I would personally ask for a mild to moderate tune. I mean seriously, what's the big deal about trying to squeeze another 25HP by super aggressive timing and high A/F's. I'm more than happy to sacrifice 0.2 sec in the 1/4 mile for the peace of mind of a good, safe tune.

 

I would go 6# since I am disappointed in my truck's performance with a 4#. Go 6, and you will never look back... just do not go over 6 as you may end having a rod poke a hole in your block.

 

Man!!!! In my mind was convinced to go with a 4#. I guess I am scared of the durability with a 6#.

Ya'll are talking me into it though!!

 

I just upped the ante to the 6#'er, and I am never going back !!!

It freaking ROCKS !!!

And TiresWinsRaces is correct ... It was all on the bottom ...
600 FT LBS of TORQUE. The boost guage JUMPS to attention now!!

 

My truck is used as my daily driver. I run a 2LB upper & 4LB lower.
From what I've heard it's safe, Not to mention the power is awesome. Hell...I ran an 8.50 @ 82.27MPH on street tires.
New times to come soon w/ new traction.