4.6 cam install
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6th Gear
Joined: Nov 2022
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4.6 cam install
I知 going to install a set of cams in my 99 f150 4.6. I知 replacing the cams obviously, the valve seals, timing chains and components, oil pump, head gaskets. Do I need to replace the crank and rod bearings and put new rings in since I知 redoing the top end?
More Turbo
Joined: Mar 2009
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are these cams compatible with the factory valve springs and retainers???
I壇 replace the timing chains, tensioners and guides as well
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6th Gear
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I知 replacing all the timing components while I知 in there. I have new valve springs and retainers.
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6th Gear
Joined: Nov 2022
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i considered putting new bearing in the crank and in the rods with new rings but if the cams weren稚 going to hurt the bottom end I was going to wait on rebuilding the bottom end for right now. The truck is just a daily driver no racing or hard towing. I知 going to pull the motor out to do everything and tear everything apart.
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6th Gear
Joined: Nov 2022
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I知 wanting to put in comp cams xe268h cams. I知 wondering if anyone knows if there will be any ptv issues. It痴 4.6 non pi. I致e seen on some forums and videos where some people didn稚 have any issues or had to degree the cam
Last edited by Oldude98; Nov 20, 2022 at 11:42 PM.
More Turbo
Joined: Mar 2009
Posts: 532
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has you had this discussion with your tuner?
what gears are in the truck?
I知 wondering why one would change the cams on a N/A npi 4.6 seems like a total waste of money and negates performance/drivability
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6th Gear
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I'm just wanting a little sound in my truck I've wanted cams for a while now. Just trying to get some helpful information on if i should do the bottom end, im pretty sure the motor has around 240ish.
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More Turbo
Joined: Mar 2009
Posts: 532
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cams will reduce the low end
if it were mine, I壇 do a PI head/cam/intake swap and enjoy it
Hotshot
Joined: Jul 2020
Posts: 10,565
Likes: 2,677
From: Near Salt Lake City
My sentiment exactly
If you want a hotrod, buy one
A screw or Turbo
Replacing the cams looking for performance is liable to be a bummer
It can be done, but the cam specs have to be close to factory, or it will run like puke
Maybe something similar to 5.4 lightning cam specs, is what I'd do if provoked
If you want a hotrod, buy one
A screw or Turbo
Replacing the cams looking for performance is liable to be a bummer
It can be done, but the cam specs have to be close to factory, or it will run like puke
Maybe something similar to 5.4 lightning cam specs, is what I'd do if provoked
More Turbo
Joined: Mar 2009
Posts: 532
Likes: 92
My sentiment exactly
If you want a hotrod, buy one
A screw or Turbo
Replacing the cams looking for performance is liable to be a bummer
It can be done, but the cam specs have to be close to factory, or it will run like puke
Maybe something similar to 5.4 lightning cam specs, is what I'd do if provoked
If you want a hotrod, buy one
A screw or Turbo
Replacing the cams looking for performance is liable to be a bummer
It can be done, but the cam specs have to be close to factory, or it will run like puke
Maybe something similar to 5.4 lightning cam specs, is what I'd do if provoked
the factory Lightning cams are identical to every other 2 valve PI camshaft
Laughing Gas
Joined: Jan 2006
Posts: 1,098
Likes: 11
From: Minnesota
If it is a deeper growl you want, for sure, ditch the NPI and get some heads and an intake and go PI. Mustangs went form 215hp. to 260 hp. with the PI setup. I know for a fact my stock 97 Mustang GT did not have the same sound as my 2000 Mustang stock GT. Granted, the Mustangs have true factory duals where as the F150 does not so that makes a difference also. I really think you will be disappointed in just a cam swap. How about doing a true dual exhaust ( not just a reverse Y) to get some growl?
Lead Driver
Joined: Sep 2002
Posts: 9,568
Likes: 2,036
From: North Texas
Why not go from the non PI 4.6 to a PI 5.4?
My PI 5.4 is 260hp/350tq area. That 4.6 I think was 210hp/260tq. Torque accelerates you anyway.
While 260hp is pretty lame, a good tune (I have 5star ones) an intake and a high flow muffler yield a much easier driving vehicle and gets down the road just fine.
My PI 5.4 is 260hp/350tq area. That 4.6 I think was 210hp/260tq. Torque accelerates you anyway.
While 260hp is pretty lame, a good tune (I have 5star ones) an intake and a high flow muffler yield a much easier driving vehicle and gets down the road just fine.
7th Gear
Joined: Feb 2021
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If it is a deeper growl you want, for sure, ditch the NPI and get some heads and an intake and go PI. Mustangs went form 215hp. to 260 hp. with the PI setup. I know for a fact my stock 97 Mustang GT did not have the same sound as my 2000 Mustang stock GT. Granted, the Mustangs have true factory duals where as the F150 does not so that makes a difference also. I really think you will be disappointed in just a cam swap. How about doing a true dual exhaust ( not just a reverse Y) to get some growl?