Very interesting in Buick Reatta Posted February 27, 2005 <div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Just the Northstar engine and trans = big bucks4.9 engine and tran = about 600-1000</div></div>Not to bash either of these engines but people who have done the Northstar swap into Fieros have experienced PCM issues because currently there is NO tuning out for them. Without the other caddy electronics present, the engine tends to operate in limp-mode so full power cannot be realized. Those who have worked around this in the Fiero community have only gotten the Northstar engines to perform on the same level as a stock or near-stock 3800 Series II SC engine in the same type of vehicle.The 4.9 caddy engine has also been done, both fuel injected and some have even elected to go carbed. However, most I have seen have only churned out performance numbers marginally better than the stock 2.8L V6 that comes in the Fiero. Certainly not as fast as a stock Northstar or 3800IISC. There are a couple of people in the Fiero community who have managed to get custom cams made and even added turbos to the 4.9, but still the fastest ones cannot touch a highly modded 3800 Series II SC.For now it appears the best engine [in my opinion] (most reliable and most power potential) to use for a swap is the 3800 Series II SC. Cheaper to come by than the Northstar, and much cheaper to mod and install into a Reatta than either caddy V8, it would be my engine of choice for a swap...unless of course you can't live without the V8 sound...or horrible gas mileage that comes with it .