Thread: 5.9 engines
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Old 05-05-2013, 02:07 PM
Gen1dak Gen1dak is offline
Dodge Ram Forum Senior Member
Join Date: Aug 2011
Location: MS Gulf Coast
Posts: 1,635
Gender: Male
Vehicle: 1990 RamCharger
Color: Red
Engine: 1988-1991 318ci (5.2L) LA V8 140hp
Rep Power: 4
Gen1dak will become famous soon enough

There are some differences, but nothing magical there. The Magnum make-over served to lend a toe-hold for hyping a new line, as well as standardizing more parts between the 318 and 360. One can easily swap Magnum heads and related parts onto even the first generation LA blocks all the way back to the late 60's. There's a minor difference in external balance weight (Magnum is less) on the 360's. The Magnum heads are the final evolution of the LA heads and evolved directly from the LA swirl port design. The improved emissions had much more to do with Mopar FINALLY catching up with Ford and Chevy in the multi-point fuel injection and computer management systems on their V8's (anyone remember the second half of the 1980's?). Mopar had MPFI on all their turbo stuff, but held off on the V8's to put it all on the Magnum. Since their trucks were the only place they had V8's, the tightening emissions rules (less strict for trucks at that point) and timeline worked in their favor. Revising the LA bought the over a decade during which they could then develop new, or should I say, revise other old designs. The 4.7 head looks a lot like the mid60's Poly, and the Gen 3 Hemi, not so different from previous gens, aside from the obvious. "What was old, is new again."
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