Cams for 98 2v 5.4l??
10-06-2015, 12:41 PM
#1
Member
Thread Starter
Cams for 98 2v 5.4l??
What would you guys recommend the most duration Cams for the 5.4 l triton with factory heads??
Choosing from these two different profiles?
Comp Cams #102530, "Tri Power Xtreme"
Adv. Duration 253 int. 261 exh.
.050 duration 218 int. 226 exh.
Lift .484 int. .475 exh.
lope sep. 115 degree
Rpm range 1,000-5,000 rpm
Requires a "Fast Flash Programmer"?
What do they mean by a Fast Flash Programmer???
The other choice is:
Comp Cams #102200, Xtreme Energy 268.
Adv. Duration 268 int 274 exh.
.050 duration 218 int. 226 exh.
Lift .500 int .500 exh.
Lope sep. 114. degrees.
Rpm range is 1,800-6,200.
Requires custom tune according to their tech line.
The truck is 4x4 off road ext cab with auto trans and a 3:73 gear ratio. with 35" tires on it.
The motor is going to be a rebuild with stock parts. Will up grade heads if needed to the 99 up style and new valve springs and retainers to match the cam. just want more torque and still have good drivability. A little camming at idle would be nice add too.
Let me know what your experience has been with these and results of these cams.
Choosing from these two different profiles?
Comp Cams #102530, "Tri Power Xtreme"
Adv. Duration 253 int. 261 exh.
.050 duration 218 int. 226 exh.
Lift .484 int. .475 exh.
lope sep. 115 degree
Rpm range 1,000-5,000 rpm
Requires a "Fast Flash Programmer"?
What do they mean by a Fast Flash Programmer???
The other choice is:
Comp Cams #102200, Xtreme Energy 268.
Adv. Duration 268 int 274 exh.
.050 duration 218 int. 226 exh.
Lift .500 int .500 exh.
Lope sep. 114. degrees.
Rpm range is 1,800-6,200.
Requires custom tune according to their tech line.
The truck is 4x4 off road ext cab with auto trans and a 3:73 gear ratio. with 35" tires on it.
The motor is going to be a rebuild with stock parts. Will up grade heads if needed to the 99 up style and new valve springs and retainers to match the cam. just want more torque and still have good drivability. A little camming at idle would be nice add too.
Let me know what your experience has been with these and results of these cams.
10-10-2015, 09:08 AM
#4
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Thread Starter
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1970Ronnie (10-10-2015)
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1970Ronnie (10-15-2015)
11-22-2015, 01:35 PM
#7
Junior Member
[QUOTE=
The truck is 4x4 off road ext cab with auto trans and a 3:73 gear ratio. with 35" tires on it.
The motor is going to be a rebuild with stock parts. Will up grade heads if needed to the 99 up style and new valve springs and retainers to match the cam. just want more torque and still have good drivability. A little camming at idle would be nice add too.
Let me know what your experience has been with these and results of these cams.[/QUOTE]
If you increase the duration you will lose the low end torque you are looking for. High lift low duration is what you need for torque. If you are running 35's you will probably need to go to 4.30 or 4.56 gears in the differentials to get your power back. The steeper gears will really come in handy if you decide to go ahead with the cam upgrade...
The truck is 4x4 off road ext cab with auto trans and a 3:73 gear ratio. with 35" tires on it.
The motor is going to be a rebuild with stock parts. Will up grade heads if needed to the 99 up style and new valve springs and retainers to match the cam. just want more torque and still have good drivability. A little camming at idle would be nice add too.
Let me know what your experience has been with these and results of these cams.[/QUOTE]
If you increase the duration you will lose the low end torque you are looking for. High lift low duration is what you need for torque. If you are running 35's you will probably need to go to 4.30 or 4.56 gears in the differentials to get your power back. The steeper gears will really come in handy if you decide to go ahead with the cam upgrade...
The following users liked this post:
1970Ronnie (11-23-2015)
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11-23-2015, 07:28 PM
#8
Member
Thread Starter
If you increase the duration you will lose the low end torque you are looking for. High lift low duration is what you need for torque. If you are running 35's you will probably need to go to 4.30 or 4.56 gears in the differentials to get your power back. The steeper gears will really come in handy if you decide to go ahead with the cam upgrade...
11-23-2015, 09:13 PM
#9
Junior Member
I'm getting too old and broken down to do too much more than basic repairs anymore, but I want to know what I'm talking about before I order parts for repairs/upgrades that I or someone else will be doing on my truck.
11-23-2015, 11:29 PM
#10
Because I feel nice tonight and i cant sleep...
Whenever you see "programmer, handheld, flash device required" it essentially means its required to re-calibrate the pcm to accommodate for the different airflow characteristics. AKA "tuning". This is an absolute must, but i would advise you take your truck to a reputable tuner with a dyno if you follow though with a cam swap. You cannot just get a canned tune in this scenario. Things that will need to be adjusted is timing, idle airflow, injector timing (if big cam), maf curve etc...
The first cam has a fatter lobe separation angle and only -8 degrees of valve overlap. In English it will have better idling characteristics and more down low power. It also has less lift (how deep the valve opens), but on the upside that wont punish your valvetrain as hard.
The second cam has a tighter lobe separation angle and -6 degrees of valve overlap. It will sound slightly more "lopey" at idle. This cam has more lift and duration so it will run much better at high RPM at the sacrifice of down low tourqe and idle quality.
More overlap = more lope in the idle. The duration is just how long the valves are open. If you a want great idle sound and power improvements, but don't want a truck that runs like garbage down low, id suggest getting a cam which has a tigher lobe seperation, decent overlap, medium lift but lower duration figures. This will yield you very high dynamic compression. The XE268 is going to beat the **** outta your valve train and will require some serious gearing and probably a different stall.
Whenever you see "programmer, handheld, flash device required" it essentially means its required to re-calibrate the pcm to accommodate for the different airflow characteristics. AKA "tuning". This is an absolute must, but i would advise you take your truck to a reputable tuner with a dyno if you follow though with a cam swap. You cannot just get a canned tune in this scenario. Things that will need to be adjusted is timing, idle airflow, injector timing (if big cam), maf curve etc...
The first cam has a fatter lobe separation angle and only -8 degrees of valve overlap. In English it will have better idling characteristics and more down low power. It also has less lift (how deep the valve opens), but on the upside that wont punish your valvetrain as hard.
The second cam has a tighter lobe separation angle and -6 degrees of valve overlap. It will sound slightly more "lopey" at idle. This cam has more lift and duration so it will run much better at high RPM at the sacrifice of down low tourqe and idle quality.
More overlap = more lope in the idle. The duration is just how long the valves are open. If you a want great idle sound and power improvements, but don't want a truck that runs like garbage down low, id suggest getting a cam which has a tigher lobe seperation, decent overlap, medium lift but lower duration figures. This will yield you very high dynamic compression. The XE268 is going to beat the **** outta your valve train and will require some serious gearing and probably a different stall.