Has anybody ever done one of the comp cams in a 5.4L.

Purpose is : Towing and Hauling

Mods: 5.4 .030 over, rasied compression, PI, LT headers, catless dual exhaust SCT custom tune.

Cams: Extreme Energy 262AH and 270AH or Tri-Power 262 and 254.

has anybody ever used either of these cams? are the significant or a little better than stock?

if it is like an e303 cam for the 5.0's ill pass.

 

You have asked a question that can get very involved and referenced two different engine families.
I would call Comp Cams hot line and run your application by them for the best chance of a worthwhile benifit for the cost and work involed.
The E303 was never meant to be a truck cam and designed to be used in a light Mass Air Mustang from back in the late 80s.
The first F150 with EFI were tuned intake systems with short timed cams for torque that was all done at about 2000 rpm.
You timing figures of 262 intake and 270 exhaust has been a staple for many years from Comp Cams.
In a 4.6/5.4, the cams are likely to be a bit different due to the better ability of these engines to breath in stock form.
As a reference, the stock engine is cammed to max out torque in the 3500 rpm range +/-.
Considering your overbore of .030 and higher compression along with a custom tune to hopefully take advantage of the changes, I would pass all this by the cam vendor and not try to guess.
Basicly I would not go longer in timing profile for pulling unless you are willing to wind the engine into a range that longer timing will be of benifit by passing more air through the motor.
Longer timing will tend to kill your off idle torque until the motor begins to build worthwhile torque.
The only thing that tends to offset this is a lower gear ratio and a tight converter.
Good luck.

 

i didn't mean to refer to a e-303 as a truck cam but as a small benifit cam. I race a 351W-393W that started as a piece by piece from a stock mass air 5.0. i know from my 5.0 experience that the e-303 is waste of time and money unless you need to pass california emissions. it has very limited gains over stock.

i have talked to comp early in my build and they said only the 262 tri-power was the only cam that would yeild best torque at 2200 which is my cruising rpm. they said it shows stock to better than stock everywhere but has alot better low end torque. all which sounds killer from a sales man, but is it worth 700 bucks?

or i could make more torque highier up and go with one of the other cams. i know regardless of what i do i will be able to get the load moving i would just like to keep it moving without downshifting constantly. hopefully having peak torque at cruise rpm would help maintain speed on the interstate.

 

I hear you, but think you are wanting to much from a motor that is well less than 350 cu/in. and NA asperaited.
You have to take into acount that these motors are DOHC and you just won't get two Cams for near the same price, new from a vendor.
To have the torque at cruise as you want takes cubic inches you don't have with a 5.4 motor unless you force induct it.
Torque comes about mainly from displacment, HP from RPM.
Both mean moving/forcing air through the motor to get the torque and HP you want.
Just think of a Diesel. Low rpm, large displcment and often blown that a gas motor cannot match in the same operating range.
I think if I were you a Diesel truck would be in order over the long term.
Good luck.

 

I use the 270AH in my Tbird. Good cams for a street/strip car with nice gains in HP and torque, but would be terrible for a truck due to the power curve. The 262AH is a noticeable difference over stock, but again, we're talking about a truck here, and if you're gonna be using the OE truck intake manifold-it's gonna be worse off than with the stock cams since both of these camshafts make their power gains higher in the RPM range than the stock cams do. It's VERY difficult to beat the stock cams in power/torque production in the RPM range that the 5.4L Triton intake manifold is designed to operate at.

 

i meant the 262h not the 262ah, after looking at the specs and rpm ranges, i decided the Tri-power cams are where its at.

-262h is a "RV" cam that doesn't even require a tune so i am assuming it is very similiar to PI cams.

-the tpx248hr-16 is the one comp suggested becuase it starts to make it's torque at 800rpm yeilding the highiest torque at 2000-2200 rpm.

-the tpx254hr-16 yeilds the best torque overall but yeilds it a little highier and starts making power at 1000rpm.

-the tpx262hr-16 has better hp and good torque but it's at 1200-5200 it won't have the best low end for 2k cruizing though.

 

IMO-you're not gonna see enough power gains over the stock cams to justify the costs of the cams.
JL

 

thats what i was wanting to know, mainly can i maintain speed better with max tq around 2200rpm or will i still have to down shift. i was afraid it wouldn't help much, just wanted to know if anybody has ran one of them.