How can you replace the 2.8 V6 engine in a 1992 Chevy Beretta with a 1994 3.1 V6?

Answer 1

First of all, if the 1994 3.1L V6 is MPFI, from a Cavalier for example (the LAST year GM used them), then YES. It will swap in, bolt to your transmission, and utilize all current sensors, connectors, hoses, and motor mounts -- even the ECU and harness! It's an easy way to gain ~20hp over your tired old 2.8L. Keep in mind, though, that the 3.1L ceased production in 1994, and most of them in the yards are now over 15 years old (with miles to match). A rebuild is highly recommended, and that adds more $$$ to the swap. But you're in luck! You have a 1992 Beretta, which has a newer style right side upper motor mount. This makes swapping in a 3400V6 a breeze. They were introduced in 1996 and can be had for as little as $400 in some yards. Since the 3400 is still in production, the odds of finding one with low miles is good. This will save you time and money on a rebuild, and gain you an EASY 45hp & 40 lb/ft over your current engine (and a 9.6:1 vs 8.9:1 ratio). This swap is a little more involved, but you can still keep your ECU and run the engine in constant MPFI mode (as opposed to SFI). I would include the 3400 fuel rail, to utilize the bigger injectors. If you can, go with a 2001+ model for improved throttle body, intake, and lifters, or 2003+ for better cylinder heads and pushrods as well. If you want even more power/dependability, (and are up to the task), you can take on swapping in a 2004+ 3500V6! They are rated at 200hp and 220 lb/ft, with 9.8:1 compression ratio, and an estimated 23 city/32 hwy fuel efficiency. Aside from the fuel rail/injectors, you will need to purchase an aftermarket throttle body (as the 3500 utilizes drive-by-wire, which you'll need to bypass). This gives you a very nice starting point, and opens the door to aftermarket performance mods. More details and information can be found in the 60degreev6.com forum. Good luck! ;-)