Join Date: Sep 1999
Location: Vancouver, WA, near Portland, OR
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Re: 231 Buick swap for 2.5L
It's a great engine. Lighter than a Chevy 4.3L. Jeep used its' predecessor, the 225 Buick from '66-'71 in CJ's and Jeepsters, (Jeep actually bought the tooling from Buick to build the 225 and then sold it back to Buick when Kaiser sold Jeep to AMC, hence the 231 debuted in '75). Specs for a '80 231/3.8L are 110 HP @ 3800 rpm and 190 lbs torque @ 1600 rpm. Turbocharged models were 170 HP @ 4000 rpm & 265 lbs torque @ 2400 rpm.