Quote:
Originally Posted by Hib Halverson
LT5 was the first GM engine with SEFI. The next one didn't come along until 1994 when increasingly stringent exhaust emissions standards had GM making the LT1 an SEFI engine. In four years, technology advanced such that SEFI LT1s didn't need the long crank time.
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There are GM engines which were SFI before the LT5, the 1984+ Grand Nationals with the 3.8 were all SFI engine with the wasted spark ignition system. Similar in appearance to the LT5 and Northstar ignition hardware.
The Buicks were known to have similar extended crank times.