3-Series (E21, E30)Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.
its overkill. the stock injectors work just fine, the only reason to switch is if your current injectors are bad or you want to upgrade to the newer 4 pintle design/disc design. single pintle 19# wont really net you much without supporting upgrades (m30 maf, headers, exhaust)
Ive done it all before on my 325i and its kinda tricky to tune even with the m30 maf (perhaps esp. so).
if you go with them with everything else stock, adjust the maf screw a couple of turns. you'll still most likely get check engine light to flicker when @ idle.
also upgrade to crane cams hi-6 digital ignition controller if you want a boost in the efficiency of the engine. with 19#'s, hi-6, m30 maf and re-gapped dual electrode bosch coppers(screw platinums) i did notice the power was more present all over the power band, however lacked the actual dyno for specific #'s.
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