351w discussion
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Senior User
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From: Coats, North Carolina
351w discussion
I want to purchase a motor that needs rebuilt with hydraulic lifters and the right motor, basically a replacement, rebuild it and do a quick engine swap....
I want to know anything and everything about these motors. What they're known for, the good, the bad, whats better. so on so forth. Did our trucks have the 2 valve or the 4 valve. so on so forth, lets hear it!
I want to know anything and everything about these motors. What they're known for, the good, the bad, whats better. so on so forth. Did our trucks have the 2 valve or the 4 valve. so on so forth, lets hear it!
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From: Central Mississippi
5.8/351s were began getting "roller" style hydraulic lifters in 94, some got them, some not, but all 94s should be capable of having them installed*. All 95s up should have them. 5.8/351s in 97-98 F-250s & larger will have roller lifters as well. (but not 150s)
2V/4V is a confusing name. Prior to the advent of modular engines by ford, it refferred to the number of "barrels" or more properly, "venturies" (the funnel/hourglass shaped thingies) in a carburetor. And it has been a while since ford put a 4-barrel carb on a 351.
Modular engines (4.6/281 & 5.4/331) are reffered to as 2v/4v, meaning that they come in 2-valve & 4-valve cylinder head configurations & aren't what you're looking for.
* The difference between roller capable & not lies in the design of the the lifter valley below the intake manifold. The bosses (the tube-like holes where the lifter lives) are different. (just FYI)
Perhaps some one can trot out some casting #s for you if you can't find an engine in its original home.
Hope this helps.
2V/4V is a confusing name. Prior to the advent of modular engines by ford, it refferred to the number of "barrels" or more properly, "venturies" (the funnel/hourglass shaped thingies) in a carburetor. And it has been a while since ford put a 4-barrel carb on a 351.
Modular engines (4.6/281 & 5.4/331) are reffered to as 2v/4v, meaning that they come in 2-valve & 4-valve cylinder head configurations & aren't what you're looking for.
* The difference between roller capable & not lies in the design of the the lifter valley below the intake manifold. The bosses (the tube-like holes where the lifter lives) are different. (just FYI)
Perhaps some one can trot out some casting #s for you if you can't find an engine in its original home.
Hope this helps.
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From: Ottawa, Ontario
All 351/5.8 motors had hydraulic lifters, but the block was modified to accept hycraulic roller lifters in '94. This is the motor you want, a '94+ 5.8 from an F or E series truck. The stock heads on these trucks are somewhat restrictive.. meaning you won't get big HP out of them without replacement. The upside is the heads are good TQ producers which is a good thing in a truck. This block and it's internals are very good quality and with regular maintenance can go 300-400k miles, it's common for seal and gasket leaks to limit that to much less however, especially if there are head gasket problems. There isn't much point in going into all the upgrade possibilities available for this motor though, because you are limited by the EFI system on that truck, you have to keep the replacement in near stock form.
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I have owned two 94 F150's one with the 5.0 and one with the 5.8 which I still have. The 5.8 is in my opinion a much better truck. It has better Torque number and the engine is pretty much bullit proof in stock form. If you start modifying it a lot, you will run into computer compatability problems. Except for the MAF conversion and perhaps a set of long tube headers, I don't reallt see why you would want to modify it any more. It has all the HP you need for road use and most off-road use.
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From: Coats, North Carolina
I wasn't planning on doing anything to major tot his truck, as stated I have the EFI computer to hold me back. Nothing gained. I completely agree this motor is an awesome motor. But it needs rebuilding, I don't want anything major, just rebuild, avoid bore if I can, keep stock cam, replace all the bearings and gaskets, replace the rotating assembly parts, and timing chain and sproket.
A freshen up at the very least, then on top of that replace the cooling system with all motorcraft parts, as well as power steering, and ignition.
Has anyone tried the edlebrock EFI Intake manifolds kit for the 351w?
A freshen up at the very least, then on top of that replace the cooling system with all motorcraft parts, as well as power steering, and ignition.
Has anyone tried the edlebrock EFI Intake manifolds kit for the 351w?
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From: Ottawa, Ontario
Originally Posted by SpeedRebel09
Has anyone tried the edlebrock EFI Intake manifolds kit for the 351w?
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From: Coats, North Carolina
Originally Posted by Conanski
Not personally.. but a few here have and reported it didn't do a whole lot on a stock motor considering the cost. The stock heads and intake are actually a pretty good match on the 5.8, and impressive gains can be realized with the right upgrades. If your truck is OBD2 as I suspect you may be a good candidate for a tuner module.
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