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Your 5.0 HO automatic block is roller capable, but was not ever roller equiped.
Roller cams and CFi work together fine, but you cannot use high flow cylinder heads. Stock, or E7, fine. As soon as it gets GT40 or GT40P's, the intake valve flow speed changes and causes poor idle. Same with exhaust. You can really go up in size and type, but there is a limit, and then the whole shootin match won't work with the stock fuel and ignition setttings.
But roller cam, yes, even a B cam. But never with high flow heads, because it was designed around the stock 157 to 225 hp cam lift and head flow rates.
Since its speed density, it can acommodate improvments, but because its speed density, you can't go too far. Past the stock 130 cfm intake manifold flow, it gets ropey. The Ford engineers made the 5.0 HO EFI Central Point injection quite unlike any other 1980 to 1985 CFi system.
They deleted the IAC/ISC systems, and the VOTM is used in a very different way, as is the choke pulloff, which is the principal difference, again proving what makes them for me the culmination of the very best minimum Fo MoCo engineering ever. Leaving out a part, and using another exsiting system to get a better result...that's smart!
Information from MANY experienced sources on this...most bail on the system very early because of a lack of good, proven info.
http://vb.foureyedpride.com/showthre...98-1985-ltd-lx
http://vb.foureyedpride.com/showthre...et-issue/page2
I was able to find the original artilcle, from Jo Peterson; it affirms the maximum allowed head, exhaust and cam swaps for
much heavier AOD Ford LTD LX HO CFi's
fgross2006 copied the exhaust suggestions, so did
never, who had haunting with a B cam and the big exhaust. Seams like just a little loss or gain of intake or exhaust scavenging, and you can over cook it, but this is what works below.
http://home.earthlink.net/~jopeterson/
http://home.earthlink.net/~jopeterson/Mods.htm
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