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5.0 CAM Help


Accarguy

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I am going to upgrade the cam in my 5.0 and I have narrowed it down to 2. I want to know if anyone has any opinions on either. This is my daily driver. Both are from Comp. I am leaning toward the second one.

SPECS:

XE266HR
35-514-8
RPM 1600-5600 Lobe Sep 112 Center line 108
Duration
Int EX
266 274
Lift
544 555



XE270HR
35-310-8
RPM 1500-5500 Lobe Sep 112 Center line 110
Duration
Int EX
270 276
Lift
533 544


Obviously the second is a bit more aggressive, but how aggressive is the million dollar question.
Thanks for the input
 
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VR4

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Both are far too aggressive without tuning. If you can tune it you'll still probably want a stall to help get this pig moving.

I've got the 258hr 35-510-8 grind and it's great. Very rarely it does stall on hot restart and immediately dropping into gear but it I wait a few seconds it's fine. No misfire codes either.
 




Accarguy

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What do you mean by stall?

The 35-510-8 looks like the more popular one to go with and says it is a great factory replacement. And it says the 35-514-8 has a slight idle though.

How is the idle/ roughness of yours. Do you by chance have a video of it?

thanks for the input
 




VR4

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Sorry. In the first instance I was talking about a torque converter with a higher stall speed. Allows the engine to rev higher before effectively transferring torque.

Second mention I mean the engine dies.


In my case it's only slightly rougher than stock. No lope. Wish it had just a little.


Before cam.
https://youtu.be/EfSBMVLbqt8

After cam.
https://youtu.be/RbrG6fCy80A
 




Accarguy

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Your fine. So you would recommend getting a torque converter then? Do you have one?

What did you do for a tune in yours?

thanks for the input
 




VR4

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My cam has about the same duration as stock but a ton more lift. It drives like stock until you get on it. No need for a higher stall converter.

I haven't tuned it yet. Still looking into options
 




shucker1

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I have the standard 266HR in mine (35-308-8).

Mild rumble and plenty of bottom end guts.

Dyno Tune did wonders.

I am pulling a 5500# boat so it helps get out off the ramp.
 




SWIGIN

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I have the Comp XE276HR in my Stang and it is a very wild cam. Very lopy idle that sounds beautiful but I would not go near that big in my EX. My Mustang needed a high stall converter ( 9.5'' 3000 stall) to work correctly with that cam.

Comp makes an Extreme 4x4 cam series for some engines but not for the 5.0 that I have seen. I have an Extreme 4x4 cam in my built 460 and it is perfect for a 4x4 or suv. It has explosive power right off idle and pulls hard to about 5500 rpm with a nice lopy idle.

If they made the Extreme 4x4 for the 5.0 I'd go for that in a heart beat.

I know this don't directly answer your question but the first two you posted are close to my Stang cam.
 




VR4

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Keep in mind if you need to go thru emissions and can't get a tune having a lopey cam will throw a p0300.

My s10 has a 276hr iirc. Nice lope especially for a v6 but does have a random misfire stored. Ford computers are more sensitive than GM in picking up and pinpointing misfires too.
 




Accarguy

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Thanks for all the input
[MENTION=290160]VR4[/MENTION] I just saw your youtube videos and you are right there is not much of a difference at idle between the two.
If i went with the 270 it would not be as aggressive than your 276 and I am probably going to get it dyno tuned after I am all done.
 




Accarguy

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Please share if you have a cam in your 5.0 Thanks!
 




fastpakr

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In case someone is considering Trick Flow's 'Track Max' stage 2 cam, I wouldn't recommend it. Way too much duration for a semi-stock engine in a heavy truck. Maybe if I'd had a matching torque converter and more compression. No power through almost 3000RPM, then pulling like a freight train when the 4R70W shifts at just below 5000. It would also help to get a tune to adjust the shift points.

The things you learn when you get the wrong cam in the box...
 




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