Head replacement 2v to 3v.
#1
Head replacement 2v to 3v.
I've pretty much given up on the idea of making a 4v out of my 2v 2002 5.4L F-150. The 4v would give me what I wanted to 3000 rpm and then kick in the other intake/exhaust runners after that. It seems the closest I can come is by using a set of 3v heads. Any body have an idea as to what would be involved? Comp Cams has the cams so it must be a popular enuff engine to consider making them. I would imagine the stock ECU could handle the new (ported) flow requirements. I'd appreciate any help I might get.
#2
wont work with 3v heads on your 2V setup. The pistons are different - yours lack the exhaust valve relief for the repositioned exhaust valve on the 3V heads. Your truck lacks the engine management to control the 3V variable cam timing. The intake wont work since yours wont fit and the 3V has drive by wire rather than a cable. I cant think of a more complicated conversion. It would be easier to put a 340 dodge engine in your truck than a pair of 3V heads.
#4
HI!... Or just do up your current 5.4. Look at my SIG. I got those #'s on a N/A 5.4.
I remember reading somewhere where after you change the pistons you can bolt on the 3-VALVE heads to a 2-VALVE shortblock, but you have to have custom cams built to run the 3-valve set-up with out the Variable Timing. I believe the guy was making over 425RWH.P in N/A trim. It's a ton of fabrication though.
I remember reading somewhere where after you change the pistons you can bolt on the 3-VALVE heads to a 2-VALVE shortblock, but you have to have custom cams built to run the 3-valve set-up with out the Variable Timing. I believe the guy was making over 425RWH.P in N/A trim. It's a ton of fabrication though.
#5
Originally Posted by Pnewman
wont work with 3v heads on your 2V setup. The pistons are different - yours lack the exhaust valve relief for the repositioned exhaust valve on the 3V heads. Your truck lacks the engine management to control the 3V variable cam timing. The intake wont work since yours wont fit and the 3V has drive by wire rather than a cable. I cant think of a more complicated conversion. It would be easier to put a 340 dodge engine in your truck than a pair of 3V heads.
#6
#7
Originally Posted by Neal
HI!... Or just do up your current 5.4. Look at my SIG. I got those #'s on a N/A 5.4.
I remember reading somewhere where after you change the pistons you can bolt on the 3-VALVE heads to a 2-VALVE shortblock, but you have to have custom cams built to run the 3-valve set-up with out the Variable Timing. I believe the guy was making over 425RWH.P in N/A trim. It's a ton of fabrication though.
I remember reading somewhere where after you change the pistons you can bolt on the 3-VALVE heads to a 2-VALVE shortblock, but you have to have custom cams built to run the 3-valve set-up with out the Variable Timing. I believe the guy was making over 425RWH.P in N/A trim. It's a ton of fabrication though.
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#9
Those three valve ports are nice and big aren't they - First time I seen them - was a little surprised -
http://cgi.ebay.com/ebaymotors/05-06...em290201809302
http://cgi.ebay.com/ebaymotors/05-06...em290201809302
#10
Originally Posted by Neal
HI!... Or just do up your current 5.4. Look at my SIG. I got those #'s on a N/A 5.4.
I remember reading somewhere where after you change the pistons you can bolt on the 3-VALVE heads to a 2-VALVE shortblock, but you have to have custom cams built to run the 3-valve set-up with out the Variable Timing. I believe the guy was making over 425RWH.P in N/A trim. It's a ton of fabrication though.
I remember reading somewhere where after you change the pistons you can bolt on the 3-VALVE heads to a 2-VALVE shortblock, but you have to have custom cams built to run the 3-valve set-up with out the Variable Timing. I believe the guy was making over 425RWH.P in N/A trim. It's a ton of fabrication though.
Originally Posted by 05RedFX4
You can replace the stock cam phasers with an adjustable cam sprocket and not have to worry about broken phasers with aftermarket cams. Just make sure your tuner knows you have them so he can turn off the variable cam timing. The adjustable cam sprokets for the 3 valve heads are made by BOSS 330 Racing.
Last edited by swazo; 02-02-2008 at 12:42 PM.
#11
Originally Posted by Pnewman
buy a 5.4 navigator 32V engine from a wrecked truck and plop it in. Easy conversion and 300HP out of the box. Add a blower down the road and have 450HP.
#12
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