PX429

Roller cam, roller lifters...etc

It rev's up higher, easier

freewilly

if you got a non roller block. you can retro kit it with proper cam. if you going solid roller it dont matter , cause they have bars between 2 lifter sets, no need for the spider, just tell them when you get the cam etc. what you working with. my 94 351w block with roller cam came out of a ford F350 pick up .i got it for free. friend deal.

vristang

Assuming you are running a carb, the firing order makes no difference.

If going EFI, the cam MUST match the firing order of the EEC.

jason

black_88gt

So if i wasnt able to get a roller motor. what everyones opinion on what i should do..Im trying to do the swap as cheap as possible. But i want it to be able to hold up.

5IVE.OH

No. You just need to change the wiring on the injectors so it matches.

vristang

Don't expect this to work.
Folks have tried it and the fuel mixture gets all out of whack.

This is because... The computer adjusts the fuel by the bank, not by the injector.

The problem is that the injectors are on banks (right and left). All fuel adjustments are made on a per bank basis.
For example the computer may lean out the right bank injectors, after getting a rich signal from the right O2.
The computer does not make fuel adjustments on individual injectors.

If 1 of the injectors that should be on the right bank have now been moved to the left bank, the AFR will get totally hosed, because the Long Term Fuel Trims will do more harm than good. The car will run like crap.

I have heard from a couple of guys who have tried it, and the car does run, but not very well.
At least not well enough to prevent the purchase of the correct cam.

jason

black_88gt

Does the 351w already have a small base circle cam stock.why can you use the 5.0 ho cam and linked roller lifter but u cant use the 5.0 ho cam with the ho lifter in the 351w.Arnt both lifters the same length.Would i be able to use the 5.0 cam with the flat tappet lifters that is already in the motor..sorry these are such dumb questions ..im learnin.

vristang

Actually, this seems to be one of the most confusing aspects of the swap.

The stock ho lifters are taller than the linked lifters. If you install the ho lifters in a non roller 351w with a standard base circle cam, then the lifter will protrude out of its bore so far that oil will spray freely from the lifter.
Kinda tough to describe, but if you envision the location of the oil hole in the lifter getting above the top of the lifter bore, you can see how oil control would be a bit of an issue.

Hope that made sense,

Yes you can use the flat tappet cam that is there already, assuming the firning order is correct for your computer.
The flat tappet lifters don't have the same issue as the roller lifters.

jason

deadcarnahans

[quote]ORIGINAL: r.barn

you just have to use a couple of special items.

you have to get a custom small base circle cam
and you have to use the expensive retro fit lifters with linked cross bar.


Here's the deal: You do not need a small base circle cam if you use the link bar lifters.
You need small base circle cam if you use Ford OEM lifters and guide bars. This prevents the lifter from raising the guide bar off of its seat above the lifter bores which would result in noise and possible cataclysm.
The length of the two types of lifters is the same, not including the extension to attach the link. The lifter will not rise enough to open the oil passage and lose pressure.

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