Putting 2.2 in a 2.5 TBI

[tvanlant]

The 2.5 TBI engine in my DD 92 spirit is going south. I am going to the pick-your-parts j/y this weekend and was thinking about picking up a 2.2 TBI engine to replace the 2.5 for better fuel economy. I'll probably do some head work to it to get the power back from the displacement loss and help further increase fuel economy.

Any opinions on this?? I think only the shadows/sundances in 92 had the 2.2 TBI engines, right? Would there be any extra work or anything I need to look out for in doing this?

and I'm not going turbo...

[turbovanman²]

Well it bolts right up, uses the same sensors but due to the 2.5 cal, it will be rich on the 2.2, so I doubt you'll get better MPG. I also don't believe that the 2.2/2.5 TBI's are any different in MPG due to the different power delivery aspects. The only way I guess to reduce fuel is with a custom cal, find a 2.2 computer???????, or trick the map into running leaner.

[tvanlant]

Yeah, I suppose the 2.5 will have more torque so I won't have to go as many revs to get moving. The only thing I would believe the 2.2 would be better is on the highway when the automatic is spinning the motor pretty high. I like to cruise around 80, so the 2.5 is up there.

Maybe I'll just re-ring and rod bearing the engine thats in the car and do the head work while it's off. Better idea?

[turbovanman²]

If thats all it needs, I would just do a rering and bearings.